WILLIAMS COMPANIES, INC. Form 10-K Annual Report Filed 2025-02-25

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

(Mark One)


☑	ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the fiscal year ended	December 31, 2024
	OR
☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from to

The Williams Companies, Inc.

Transcontinental Gas Pipe Line Company, LLC

Northwest Pipeline LLC

(Exact Name of Registrant as Specified in Its Charter)


	Commission file number:	State or Other Jurisdiction of Incorporation or Organization:	IRS Employer Identification No.:
The Williams Companies, Inc.	1-4174	Delaware	73-0569878
Transcontinental Gas Pipe Line Company, LLC	1-7584	Delaware	74-1079400
Northwest Pipeline LLC	1-7414	Delaware	26-1157701


	Address of Principal Executive Offices:	Zip Code:	Registrant’s Telephone Number, Including Area Code:
The Williams Companies, Inc.	One Williams Center, Tulsa, Oklahoma	74172	800-945-5426 (800-WILLIAMS)
Transcontinental Gas Pipe Line Company, LLC	2800 Post Oak Boulevard, Houston, Texas	77056	713-215-2000
Northwest Pipeline LLC	One Williams Center, Tulsa, Oklahoma	74172	800-945-5426

Securities registered pursuant to Section 12(b) of the Act:


	Title of Each Class	Trading Symbol(s)	Name of Each Exchange on Which Registered
The Williams Companies, Inc.	Common Stock, $1.00 par value	WMB	New York Stock Exchange
Transcontinental Gas Pipe Line Company, LLC	None	None	None
Northwest Pipeline LLC	None	None	None

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

The Williams Companies, Inc.

Yes

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Transcontinental Gas Pipe Line Company, LLC

Yes

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☑

Northwest Pipeline LLC

Yes

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☑

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

The Williams Companies, Inc.

Yes

☐

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Transcontinental Gas Pipe Line Company, LLC

Yes

☐

☑

Northwest Pipeline LLC

Yes

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☑

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

The Williams Companies, Inc.

Yes

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Transcontinental Gas Pipe Line Company, LLC

Yes

☑

☐

Northwest Pipeline LLC

Yes

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☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

The Williams Companies, Inc.

Yes

☑

☐

Transcontinental Gas Pipe Line Company, LLC

Yes

☑

☐

Northwest Pipeline LLC

Yes

☑

☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

The Williams Companies, Inc.

Large accelerated filer

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Accelerated filer

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Non-accelerated filer

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Smaller reporting company

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Emerging growth company

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Transcontinental Gas Pipe Line Company, LLC

Large accelerated filer

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Accelerated filer

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Non-accelerated filer

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Smaller reporting company

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Emerging growth company

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Northwest Pipeline LLC

Large accelerated filer

☐

Accelerated filer

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Non-accelerated filer

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Smaller reporting company

☐

Emerging growth company

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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.


The Williams Companies, Inc.			☐
Transcontinental Gas Pipe Line Company, LLC			☐
Northwest Pipeline LLC			☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.


The Williams Companies, Inc.			☑
Transcontinental Gas Pipe Line Company, LLC			☐
Northwest Pipeline LLC			☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.


The Williams Companies, Inc.			☑
Transcontinental Gas Pipe Line Company, LLC			☐
Northwest Pipeline LLC			☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).


The Williams Companies, Inc.			☐
Transcontinental Gas Pipe Line Company, LLC			☐
Northwest Pipeline LLC			☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).

The Williams Companies, Inc.

Yes

☐

☑

Transcontinental Gas Pipe Line Company, LLC

Yes

☐

☑

Northwest Pipeline LLC

Yes

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The aggregate market value of the voting and nonvoting common equity held by nonaffiliates computed by reference to the price at which the common equity was last sold as of the last business day of the registrant’s most recently completed second quarter was approximately:


The Williams Companies, Inc.			$49,974,668,630
Transcontinental Gas Pipe Line Company, LLC			None
Northwest Pipeline LLC			None

The number of shares outstanding of the registrant’s common stock outstanding at February 20, 2025 was:


The Williams Companies, Inc.			1,219,369,295
Transcontinental Gas Pipe Line Company, LLC			None
Northwest Pipeline LLC			None

DOCUMENTS INCORPORATED BY REFERENCE


The Williams Companies, Inc.			Portions of the Williams’ Definitive Proxy Statement for the Williams’ Annual Meeting of Stockholders to be held on April 29, 2025, are incorporated into Part III, as specifically set forth in Part III.
Transcontinental Gas Pipe Line Company, LLC			None
Northwest Pipeline LLC			None

Both Transcontinental Gas Pipe Line Company, LLC and Northwest Pipeline LLC meet the conditions set forth in General Instructions I(1)(a) and (b) of Form 10-K and is therefore filing this Form 10-K with the reduced disclosure format specified in General Instructions I(2)(b), (c), and (d) of Form 10-K.

This combined Form 10-K is separately filed by The Williams Companies, Inc., Transcontinental Gas Pipe Line Company, LLC, and Northwest Pipeline LLC. Information contained herein relating to any individual registrant is filed by such registrant on its own behalf. Each registrant makes no representation as to information relating to the other registrants.

FORM 10-K

TABLE OF CONTENTS


		Page
PART I

Item 1.	Business	4















Item 1A.	Risk Factors	28
Item 1B.	Unresolved Staff Comments	48
Item 1C.	Cybersecurity	48
Item 2.	Properties	50
Item 3.	Legal Proceedings	50
Item 4.	Mine Safety Disclosures	51
	Information About Williams’ Executive Officers	52

	PART II

Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	54

Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	56
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	88
Item 8.	Financial Statements and Supplementary Data	93


Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	193
Item 9A.	Controls and Procedures	193
Item 9B.	Other Information	198
Item 9C.	Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	198

	PART III

Item 10.	Directors, Executive Officers and Corporate Governance	198
Item 11.	Executive Compensation	199
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	199
Item 13.	Certain Relationships and Related Transactions, and Director Independence	199
Item 14.	Principal Accountant Fees and Services	199

	PART IV

Item 15.	Exhibits and Financial Statement Schedules	201
Item 16.	Form 10-K Summary	213

DEFINITIONS

The following is a listing of certain abbreviations, acronyms, and other industry terminology that may be used throughout this Form 10-K.

Measurements:

Barrel or Bbl: One barrel of petroleum products that equals 42 U.S. gallons

Mbbls/d: One thousand barrels per day

Bcf : One billion cubic feet of natural gas

Bcf/d: One billion cubic feet of natural gas per day

MMcf/d: One million cubic feet of natural gas per day

British Thermal Unit (Btu): A unit of energy needed to raise the temperature of one pound of water by one degree Fahrenheit

MMBtu: One million British thermal units

Dekatherms (Dth): A unit of energy equal to one million British thermal units

Mdth/d: One thousand dekatherms per day

MMdth: One million dekatherms or approximately one trillion British thermal units

MMdth/d: One million dekatherms per day

Government and Regulatory:

EPA: Environmental Protection Agency

Exchange Act, the: Securities and Exchange Act of 1934, as amended

FERC: Federal Energy Regulatory Commission

IRS: Internal Revenue Service

NGA: Natural Gas Act of 1938, as amended

SEC: Securities and Exchange Commission

Securities Act, the: Securities Act of 1933, as amended

Other:

Note: References to numerical notes refer to the Combined Notes to Financial Statements.

EBITDA: Earnings before interest, taxes, depreciation, and amortization

Fractionation: The process by which a mixed stream of natural gas liquids is separated into constituent products, such as ethane, propane, and butane

GAAP: U.S. generally accepted accounting principles

LNG: Liquefied natural gas; natural gas which has been liquefied at cryogenic temperatures

MVC: Minimum volume commitments

NGLs: Natural gas liquids; natural gas liquids result from natural gas processing and crude oil refining and are used as petrochemical feedstocks, heating fuels, and gasoline additives, among other applications.

Equity NGL margins: NGL revenues less Btu replacement cost, plant fuel, transportation, and fractionation

Registrants: The Williams Companies, Inc. (Williams), and Williams’ wholly owned subsidiaries Transcontinental Gas Pipe Line Company, LLC (Transco) and Northwest Pipeline LLC (NWP) are each individually referred to as a Registrant and collectively as the Registrants.

Appalachia Midstream Investments: Williams’ equity-method investments with an approximate average 66 percent interest in multiple gas gathering systems in the Marcellus Shale region

Crowheart Acquisition: On November 1, 2024, Williams closed on the acquisition of Crowheart Energy, LLC, resulting in more than a 90 percent ownership interest in certain crude oil and natural gas properties in the Wamsutter basin in Wyoming. Prior to this acquisition, Williams held a 75 percent undivided interest in each well’s working interest.

Discovery Acquisition: On August 1, 2024, Williams closed on the acquisition of the remaining 40 percent interest in Discovery Producer Services, LLC (Discovery) which operates a natural gas gathering and transportation system in the Gulf of America and processing and fractionation facilities in Louisiana, along with certain other assets.

DJ Basin Acquisitions: On November 30, 2023, Williams closed on the acquisition of 100 percent of Cureton Front Range, LLC (Cureton) (Cureton Acquisition) and also closed on the acquisition of the remaining 50 percent interest in Rocky Mountain Midstream Holdings LLC (RMM) (RMM Acquisition), both of which operate midstream assets in the Denver-Julesberg (DJ) Basin.

Gulf Coast Storage Acquisition: On January 3, 2024, Williams closed on the acquisition of 100 percent of both Hartree Cardinal Gas, LLC and Hartree Natural Gas Storage, LLC (collectively, “Hartree”), which own natural gas storage facilities and pipelines in Louisiana and Mississippi.

MountainWest Acquisition: On February 14, 2023, Williams closed on the acquisition of 100 percent of MountainWest Pipelines Holding Company (MountainWest), which includes FERC-regulated interstate natural gas pipeline systems and natural gas storage capacity.

Trace Acquisition: On April 29, 2022, Williams closed on the acquisition of 100 percent of Gemini Arklatex, LLC through which the Haynesville Shale region gas gathering and related assets were acquired.

NorTex Asset Purchase: On August 31, 2022, Williams purchased a group of assets in north Texas, primarily natural gas storage facilities and pipelines, from NorTex Midstream Holdings, LLC.

PART I

Item 1. Business

This report includes information for multiple registrants, specifically The Williams Companies, Inc. (Williams), as well as Transcontinental Gas Pipe Line Company, LLC (Transco) and Northwest Pipeline LLC (NWP) both of which are wholly owned subsidiaries of Williams (collectively, the Registrants). References to subsidiaries by name, including equity-method investees, Transco, and NWP, refer exclusively to those businesses and operations.

General

Williams is an energy company committed to being the leader in providing infrastructure that safely delivers natural gas products to reliably fuel the clean energy economy. Williams has operations in 12 supply areas that provide natural gas gathering, processing, and transmission services; NGLs fractionation, transportation, and storage services; and marketing services to approximately 800 customers. Williams owns an interest in and operates over 33,000 miles of pipelines in 24 states, 34 natural gas processing facilities, 9 NGL fractionation facilities, approximately 25 million barrels of NGL storage capacity, and 417 Bcf of natural gas storage capacity, and delivers natural gas that is used every day for clean-power generation, heating, and industrial use.

Williams was founded in 1908, originally incorporated under the laws of the state of Nevada in 1949 and reincorporated under the laws of the state of Delaware in 1987. Its common stock trades on the New York Stock Exchange under the symbol “WMB.” Its operations are located in the United States. Williams’ headquarters are located in Tulsa, Oklahoma, with other major offices in Houston, Texas; Pittsburgh, Pennsylvania; and Salt Lake City, Utah.

Transco owns and operates an approximately 9,700-mile natural gas pipeline system extending from Texas, Louisiana, Mississippi and the Gulf of America through Alabama, Georgia, South Carolina, North Carolina, Virginia, Maryland, Delaware, Pennsylvania and New Jersey to the New York City metropolitan area. The system serves customers in Texas and the 12 southeast and Atlantic seaboard states mentioned above, including major metropolitan areas in Georgia, Washington D.C., Maryland, North Carolina, New York, New Jersey, and Pennsylvania. Transco’s principal business is the interstate transportation of natural gas, which is regulated by the FERC.

NWP owns and operates an approximately 3,900-mile natural gas pipeline system, extending from the San Juan basin in northwestern New Mexico and southwestern Colorado through Colorado, Utah, Wyoming, Idaho, Oregon, and Washington to a point on the Canadian border near Sumas, Washington. The system serves customers in Washington, Oregon, Idaho, Wyoming, Nevada, Utah, Colorado, New Mexico, California, and Arizona, either directly or indirectly through interconnections with other pipelines. NWP’s principal business is the interstate transportation of natural gas, which is regulated by FERC.

Service Assets, Customers, and Contracts

Key variables for Williams’ businesses will continue to be:

•Obstacles to Williams’ expansion efforts, including delays or denials of necessary permits and opposition to hydrocarbon-based energy development;

•Producer drilling activities impacting natural gas supplies supporting Williams’ gathering and processing volumes;

•Retaining and attracting customers by continuing to provide reliable services;

•Revenue growth associated with additional infrastructure either completed or currently under construction;

•Prices impacting Williams’ commodity-based activities;

•Disciplined growth in Williams’ service areas.

Interstate Natural Gas Pipeline Assets

Williams’ interstate natural gas pipelines, which are presented in the Transmission & Gulf of America segment as described under the heading “Business Segments,” are subject to regulation by the FERC and as such, rates and charges for the transportation of natural gas in interstate commerce are subject to regulation. The rates are established primarily through the FERC’s ratemaking process, but rates may also be negotiated with customers pursuant to the terms of tariffs and FERC policy.

Williams’ interstate natural gas pipelines transport and store natural gas for a broad mix of customers, including local natural gas distribution companies, public utilities, municipalities, direct industrial users, electric power generators, and natural gas marketers and producers. Most of Williams’ interstate natural gas transmission businesses are fully contracted under long-term firm reservation contracts with high credit quality customers. These contracts have various expiration dates and account for the major portion of these regulated businesses. Additionally, Williams offers storage services and interruptible transportation services under shorter-term agreements. The top ten customers of the interstate natural gas pipelines in 2024 accounted for approximately 45 percent of Williams’ regulated interstate natural gas transportation and storage revenues.

Transco’s three largest customers in 2024 accounted for approximately 20 percent of Transco’s total operating revenues. Transco’s firm transportation agreements are generally long-term agreements with various expiration dates and account for the major portion of its business.

During 2024, NWP’s three largest customers were Puget Sound Energy, Inc., Cascade Natural Gas Corporation, and Northwest Natural Gas Company, which accounted for approximately 31 percent, 10 percent, and 11 percent, respectively, of NWP total operating revenues for the year ended December 31, 2024. No other customer accounted for more than 10 percent of NWP total operating revenues during that period.

Natural Gas Gathering and Processing Assets

Williams’ gathering, processing, and treating operations are presented within the Transmission & Gulf of America, Northeast G&P, and West reporting segments as described under the heading “Business Segments.”

Williams’ gathering systems receive natural gas from producers’ crude oil and natural gas wells and gather these volumes to gas processing, treating, or redelivery facilities. Typically, natural gas, in its raw form, is not acceptable for transportation in major interstate natural gas pipelines or for commercial use as a fuel. Williams’ treating facilities remove water vapor, carbon dioxide, and other contaminants, and collect condensate. Williams is generally paid a fee based on the volume of natural gas gathered and/or treated, generally measured in the Btu heating value.

In addition, natural gas contains various amounts of NGLs, which generally have a higher value when separated from the natural gas stream. Williams’ processing plants extract the NGLs, which include ethane, primarily used in the petrochemical industry; propane, used for heating, fuel, and also in the petrochemical industry; and, normal butane, isobutane, and natural gasoline, primarily used by the refining industry.

Williams’ gas processing services generate revenues primarily from the following types of contracts:

•Fee-based: A cash fee is received based on the volume of natural gas processed, generally measured in the Btu heating value. A portion of Williams’ fee-based processing revenue includes a share of the margins on the NGLs produced. For the year ended December 31, 2024, approximately 95 percent of NGL production volumes were under fee-based contracts.

•Noncash commodity-based: Gas is also processed under two types of commodity-based contracts, keep-whole and percent-of-liquids, where consideration for services is received in the form of NGLs. For a keep-whole arrangement Williams replaces the Btu content of the retained NGLs with natural gas purchases, also known as shrink replacement gas. For a percent-of-liquids arrangement, Williams delivers an agreed-upon percentage of the extracted NGLs and retains the remainder. Retained NGLs, referred to as equity NGL production, are then sold. Per-unit NGL margins are calculated based on sales of these equity volumes at the processing plants. For the year ended December 31, 2024, approximately 5 percent of NGL production volumes were under noncash commodity-based contracts.

Generally, Williams’ gathering and processing agreements are long-term agreements, with terms ranging from month-to-month to the life of the producing lease. Certain contracts include cost-of-service mechanisms that are designed to support a return on invested capital and allow gathering rates to be adjusted, subject to specified caps in certain cases, to account for variability in volume, capital expenditures, commodity price fluctuations, compression, and other expenses. Williams also has certain gas gathering and processing agreements with MVC, whereby the customer is obligated to pay a contractually determined fee based on any shortfall between the actual gathered and processed volumes and the MVC for a stated period.

Demand for gas gathering and processing services is dependent on producers’ drilling activities, which is impacted by the strength of the economy, commodity prices, and the resulting demand for natural gas by manufacturing and industrial companies and consumers. Williams’ gathering, processing, and treating businesses do not have direct exposure to crude oil prices. Williams’ on-shore natural gas gathering and processing businesses are substantially focused on gas-directed drilling basins rather than crude oil, with a broad diversity of basins and customers served. Declines in crude oil drilling would be expected to result in less associated natural gas production, which could drive more demand for natural gas produced from gas-directed basins served.

During 2024, Williams’ facilities gathered and processed gas for approximately 248 customers. The top ten customers accounted for approximately 59 percent of gathering and processing fee revenues and NGL margins from noncash commodity-based agreements. Williams believes counterparty credit concerns in its gathering and processing businesses are significantly mitigated by the physical nature of Williams’ services, where gathering occurs at the wellhead and therefore is critical to a producer’s ability to move product to market.

Gas and NGL Marketing

Williams’ natural gas and NGL marketing services are presented primarily within its Gas & NGL Marketing Services segment. Williams markets natural gas and NGL products to a wide range of users in the energy and petrochemical industries. In 2024, the three largest natural gas marketing customers accounted for approximately 10 percent of Williams’ gross natural gas marketing sales, and the three largest NGL marketing customers accounted for approximately 37 percent of Williams’ NGL marketing sales.

Williams’ gas marketing business markets natural gas and provides natural gas asset management and wholesale marketing, trading, storage, and transportation for a diverse set of natural gas and electric utilities, municipalities, power generators, and producers, including for Williams’ upstream properties. Additionally, Williams’ gas marketing business moves and optimizes natural gas to markets through transportation and storage agreements on Williams’ own strategically positioned assets. Williams’ gas and NGL marketing services provide customers with access to diverse sources of supply and to various natural gas demand markets, including the southeastern and Gulf Coast regions which are the fastest growing natural gas demand regions in the United States.

Williams purchases natural gas for storage when the current market price paid to buy and transport natural gas plus the cost to store and finance the natural gas is less than an estimated, forward market price that can be received in the future, resulting in positive net product sales. Commodity-based exchange-traded futures contracts and over-the-counter (OTC) contracts are used to sell natural gas at that future price to substantially protect the natural gas revenues that will ultimately be realized when the stored natural gas is sold. Additionally, Williams enters into transactions to secure transportation capacity between delivery points in order to serve Williams’ customers and various markets. Commodity-based exchange-traded futures contracts and OTC contracts are used to capture the price differential or spread between the locations served by the capacity in order to substantially protect the natural gas revenues that will ultimately be realized when the physical flow of natural gas between receipt and delivery points occurs.

Monthly demand charges incurred for the contracted storage and transportation capacity and payments associated with asset management agreements are substantially indirectly reimbursed by customers. As Williams is acting as an agent, natural gas marketing revenues are presented net of the related costs of those activities. In addition, all of Williams’ natural gas marketing derivative activities qualify as held for trading purposes, which requires net presentation in Williams Consolidated Statement of Income.

Williams’ NGL marketing business transports and markets equity NGLs from the production at Williams’ processing plants, NGLs from the production at Williams’ upstream properties, and also NGLs on behalf of third-party NGL producers, including some of our fee-based processing customers, as well as the NGL volumes owned by certain of Williams’ equity-method investments. The NGL marketing business bears the risk of price changes in these NGL volumes while they are being transported to final sales delivery points. In order to meet sales contract obligations, Williams may purchase products in the spot market for resale.

Williams is exposed to commodity price risk. To manage this volatility, various contracts are used in the marketing and trading activities that generally meet the definition of derivatives. Williams enters into commodity-related derivatives to hedge exposures to natural gas and NGLs and retain exposure to price changes that can, in a volatile energy market, be material and can adversely affect results of operations.

Williams experiences significant earnings volatility from the fair value accounting required for the derivatives used to hedge a portion of the economic value of the underlying transportation and storage portfolio as well as upstream related production. However, the unrealized fair value measurement gains and losses are generally offset by valuation changes in the economic value of the underlying production or transportation and storage contracts, which is not recognized until the underlying transaction occurs.

Crude Oil Transportation and Production Handling Assets

Williams’ crude oil transportation operations, which are primarily presented in the Transmission & Gulf of America segment as described under the heading “Business Segments,” earn revenues primarily from a combination of fixed-monthly fees, contractual fixed or variable fees applied to production volumes, and contributions in aid of

construction (CIAC) arrangements. Generally, fixed-monthly fees associated with production handling and export revenues are recognized on a units-of-production basis utilizing either contractually determined maximum daily quantities or expected remaining production. CIAC arrangements are recognized on a units of production basis, utilizing expected remaining production. Williams’ crude oil transportation business is supported mostly by major oil producers with long-cycle perspectives.

Standalone, Market-Based Rate Natural Gas Storage Assets

Williams’ standalone, market-based rate natural gas storage assets are presented in the Transmission & Gulf of America segment as described under the heading “Business Segments” and include Williams’ North Texas Assets (NorTex) acquired in August 2022 and Williams’ Gulf Coast storage assets acquired in January 2024. These natural gas storage assets provide natural gas storage services in interstate commerce under the jurisdiction of the FERC pursuant to the Natural Gas Act or Section 311 of the Natural Gas Policy Act. Williams is authorized to charge and collect market-based rates for all of the services that these natural gas storage assets provide.

Williams stores natural gas for a broad mix of customers, including local natural gas distribution companies, public utilities, municipalities, direct industrial users, electric power generators, and natural gas marketers and producers. Most of these natural gas storage businesses are fully contracted under long-term firm reservation contracts with high credit quality customers. The contracts have various expiration dates and account for the major portion of the entities’ businesses. The three largest customers of this business in 2024 accounted for approximately 21 percent of its total operating revenues.

Business Segments

Consistent with the manner in which Williams’ chief operating decision maker evaluates performance and allocates resources, Williams’ operations are conducted, managed, and presented in Part I of this Annual Report within the following reportable segments: Transmission & Gulf of America, Northeast G&P, West, and Gas & NGL Marketing Services. All remaining business activities, including upstream operations, certain new energy ventures, and corporate activities, are included in Other.

Williams’ reportable segments are comprised of the following business activities:

•Transmission & Gulf of America is comprised of the Transco, NWP, and MountainWest interstate natural gas pipelines, and their related natural gas storage facilities, as well as natural gas gathering and processing and crude oil production handling and transportation assets in the Gulf Coast region, including Discovery, a former 60 percent equity-method investment in which Williams acquired the remaining ownership interest in August 2024, a 51 percent interest in Gulfstar One LLC (Gulfstar One), and a 50 percent equity-method investment in Gulfstream Natural Gas System, L.L.C. (Gulfstream). Transmission & Gulf of America also includes natural gas storage facilities and pipelines providing services in north Texas, Louisiana, and Mississippi.

•Northeast G&P is comprised of midstream gathering, processing, and fractionation businesses in the Marcellus Shale region primarily in Pennsylvania and New York, and the Utica Shale region of eastern Ohio, as well as a 65 percent interest in Ohio Valley Midstream LLC (Northeast JV) which operates in West Virginia, Ohio, and Pennsylvania, a 66 percent interest in Cardinal Gas Services, L.L.C. (Cardinal) which operates in Ohio, a 69 percent equity-method investment in Laurel Mountain Midstream, LLC (Laurel Mountain), a 50 percent equity-method investment in Blue Racer Midstream LLC (Blue Racer), and Appalachia Midstream Investments.

•West is comprised of gas gathering, processing, and treating operations in the Rocky Mountain region of Colorado and Wyoming, the Barnett Shale region of north-central Texas, the Eagle Ford Shale region of south Texas, the Haynesville Shale region of east Texas and northwest Louisiana, the Mid-Continent region which includes the Anadarko and Permian basins, and the DJ Basin of Colorado which includes RMM, a former 50 percent equity-method investment in which Williams acquired the remaining ownership interest in November 2023. This segment also includes NGL storage facilities, an undivided 50 percent interest in

an NGL fractionator near Conway, Kansas, and a 50 percent equity-method investment in Overland Pass Pipeline Company LLC (OPPL).

•Gas & NGL Marketing Services is comprised of NGL and natural gas marketing and trading operations, which includes risk management and transactions related to the storage and transportation of natural gas and NGLs on strategically positioned assets.

Detailed discussion of each of our reportable segments follows. For a discussion of ongoing expansion projects, see Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Transmission & Gulf of America

Interstate Natural Gas Pipeline Assets

Transco

At December 31, 2024, Transco’s system had a design capacity totaling approximately 19.8 MMdth/d. During 2024, Transco began full service on the Regional Energy Access expansion project which added approximately 0.4 MMdth/d of firm transportation capacity to its pipeline, partial early service on the Southside Reliability Enhancement expansion project which added approximately 0.4 MMdth/d of firm transportation capacity, and full service on Carolina Market Link expansion project which added approximately 0.1 MMdth/d of firm transportation capacity. In addition, a reduction of approximately 0.1 MMdth/d of firm transportation capacity is attributable to unsubscribed capacity as well as a reduction of approximately 0.1 MMdth/d of firm transportation capacity is attributable to termination of interim service related to the Regional Energy Access expansion project. Transco’s system includes 61 compressor stations, four underground storage fields, and one LNG storage facility. Compression facilities at sea level-rated capacity total approximately 2.6 million horsepower.

Transco has natural gas storage capacity in four underground storage fields located on or near its pipeline system or market areas and operates two of these storage fields. Transco also has storage capacity in an LNG storage facility that it owns and operates. The total usable gas storage capacity available to Transco and its customers in such underground storage fields and LNG storage facility and through storage service contracts is approximately 188 Bcf of natural gas. At December 31, 2024, Transco’s customers had stored in its facilities approximately 137 Bcf of natural gas. Storage capacity permits Transco’s customers to inject gas into storage during the summer and off-peak periods for delivery during peak winter demand periods.

NWP

At December 31, 2024, NWP’s system had a design capacity totaling approximately 3.8 MMdth/d. NWP’s system includes 42 transmission compressor stations having a combined sea level-rated capacity of approximately 476,000 horsepower.

NWP owns a one-third undivided interest in the Jackson Prairie underground storage facility in Washington. NWP also owns and operates an LNG storage facility in Washington. These storage facilities have an aggregate working natural gas storage capacity of approximately 10 Bcf. NWP also contracts for natural gas storage services for approximately 3 Bcf at the Clay basin underground storage reservoir with a Williams’ affiliate, MountainWest. These natural gas storage facilities, which are substantially utilized for third-party natural gas, enable NWP to balance daily receipts and deliveries and provide storage services to customers.

MountainWest Acquisition

On February 14, 2023, Williams closed on the acquisition of 100 percent of MountainWest Pipelines Holding Company. MountainWest is an interstate natural gas transmission company that owns and operates an approximately 2,000-mile natural gas pipeline system which is regulated by the FERC. At December 31, 2024, MountainWest’s system has a design capacity totaling 8.0 MMdth/d. The system is comprised of MountainWest Pipeline, LLC; MountainWest Overthrust Pipeline, LLC; a 50 percent equity-method interest in White River Hub, LLC; and 64 Bcf of natural gas storage capacity, including the Clay basin underground storage reservoir in Utah. During 2024, MountainWest increased its natural gas storage capacity at the Clay basin underground storage reservoir by

approximately 8 Bcf. MountainWest is located in the Rocky Mountains near six producing areas, including the Greater Green River basin in Wyoming, the Uinta basin in Utah, and the Piceance basin in Colorado.

Gulfstream

Williams owns a 50 percent equity-method investment in Gulfstream, a 745-mile interstate natural gas pipeline system extending from the Mobile Bay area in Alabama to markets in Florida, which has a capacity to transport 1.4 Bcf/d. Operating responsibilities for Gulfstream are shared with the other 50 percent owner.

Standalone, Market-Based Rate Natural Gas Storage Assets

Gulf Coast Storage Acquisition

On January 3, 2024, Williams closed on the Gulf Coast Storage Acquisition. At December 31, 2024, these assets include a strategic portfolio of approximately 230 miles of natural gas transmission pipelines and six underground storage facilities with a capacity of approximately 118 Bcf of natural gas storage across Louisiana and Mississippi and direct access to LNG export facilities and interstate pipelines. These assets expand Williams’ natural gas storage footprint in the Gulf Coast region.

North Texas Assets (NorTex)

On August 31, 2022, Williams purchased a group of assets in north Texas from NorTex Midstream Holdings, LLC. At December 31, 2024, NorTex includes approximately 94 miles of natural gas transmission pipelines and 37 Bcf of natural gas storage in the Dallas-Fort Worth market. In addition to providing gas supply to power generation in north Texas, these assets also provide storage services for Permian gas directed toward growing Gulf Coast LNG demand.

Natural Gas Gathering and Processing Assets

The following tables summarize the significant owned and operated gathering and processing assets of this segment:


	Offshore Natural Gas Gathering Pipelines
	Location	Pipeline Miles	Inlet Capacity (Bcf/d)	Ownership Interest	Supply Basins
Consolidated:
Canyon Chief, including Blind Faith and Gulfstar extensions	Deepwater Gulf of America	156	0.5	100%	Eastern Gulf of America
Norphlet	Deepwater Gulf of America	58	0.3	100%	Eastern Gulf of America
Other Eastern Gulf	Offshore shelf and other	46	0.2	100%	Eastern Gulf of America
Seahawk	Deepwater Gulf of America	115	0.4	100%	Western Gulf of America
Perdido Norte	Deepwater Gulf of America	105	0.3	100%	Western Gulf of America
Whale	Deepwater Gulf of America	26	0.2	100%	Western Gulf of America
Other Western Gulf	Offshore shelf and other	53	0.2	100%	Western Gulf of America

Discovery	Central Gulf of America	594	0.6	100%	Central Gulf of America

Natural Gas Processing Facilities

Location

Inlet Capacity (Bcf/d)

NGL Production Capacity (Mbbls/d)

Ownership Interest

Supply Basins

Consolidated:

Markham

Markham, TX

0.5

100%

Western Gulf of America

Mobile Bay

Coden, AL

0.7

100%

Eastern Gulf of America

Discovery

Larose, LA

0.6

100%

Central Gulf of America

Crude Oil Transportation and Production Handling Assets

In addition to Williams’ natural gas assets, Williams owns and operates four deepwater crude oil pipelines and owns and operates production platforms serving the deepwater in the Gulf of America. Williams’ offshore floating production platforms provide centralized services to deepwater producers such as compression, separation, production handling, water removal, and pipeline landings.

The following tables summarize the significant operated crude oil transportation pipelines and production handling platforms of this segment:


	Crude Oil Pipelines
	Pipeline Miles	Capacity (Mbbls/d)	Ownership Interest	Supply Basins
Consolidated:
Mountaineer, including Blind Faith and Gulfstar extensions	155	150	100%	Eastern Gulf of America
BANJO	57	90	100%	Western Gulf of America
Alpine	96	85	100%	Western Gulf of America
Perdido Norte	74	150	100%	Western Gulf of America
Whale	124	140	100%	Western Gulf of America


	Production Handling Platforms
	Gas Inlet Capacity (MMcf/d)	Crude/NGL Handling Capacity (Mbbls/d)	Ownership Interest	Supply Basins
Consolidated:
Devils Tower	110	60	100%	Eastern Gulf of America
Gulfstar I FPS (1)	172	80	51%	Eastern Gulf of America


Discovery	75	10	100%	Central Gulf of America

__________

(1)Statistics reflect 100 percent of the assets from Williams’ 51 percent interest in Gulfstar One floating production system (FPS).

Discovery Acquisition

On August 1, 2024, Williams closed on the acquisition of the remaining 40 percent interest in Discovery, along with certain other assets. Discovery’s assets include a 600 MMcf/d cryogenic natural gas processing plant near Larose, Louisiana, a 35 Mbbls/d NGL fractionator plant near Paradis, Louisiana, and a 594-mile offshore natural gas gathering and transportation system in the Gulf of America. Discovery’s mainline has a gathering inlet capacity of 600 MMcf/d. Discovery’s assets also include a crude oil production handling platform with capacity of 10 Mbbls/d and gas handling and separation capacity of 75 MMcf/d.

Deepwater Whale Expansion Project

existing Western Gulf of America offshore infrastructure via a 26-mile gas lateral pipeline from the Whale platform to the existing Perdido gas pipeline and added a new 124-mile oil pipeline from the Whale platform to Williams’ existing junction platform. This project was placed into service in January 2025.

Transmission & Gulf of America Operating Statistics


	2024	2023	2022
	(Annual Average Amounts)
Consolidated:
Interstate natural gas pipeline throughput (MMdth/d) (1) (2)	20.2	20.4	16.9
Gathering volumes (Bcf/d)	0.55	0.26	0.29
Plant inlet natural gas volumes (Bcf/d)	0.71	0.44	0.47
NGL production (Mbbls/d)	47	27	28
NGL equity sales (Mbbls/d)	10	6	6
Crude oil transportation (Mbbls/d)	113	123	119

Non-consolidated: (3)
Interstate natural gas pipeline throughput (MMdth/d) (1)	1.2	1.2	1.3
Gathering volumes (Bcf/d)	—	0.34	0.40
Plant inlet natural gas volumes (Bcf/d)	—	0.34	0.40
NGL production (Mbbls/d)	—	27	28
NGL equity sales (Mbbls/d)	—	7	8

_____________

(1)Tbtu converted to MMdth at one trillion British thermal units = one million dekatherms.

(2)Includes volumes for natural gas transmission assets acquired in the MountainWest Acquisition after the purchase on February 14, 2023, including 100 percent of the volumes associate with the operated equity-method investment White River Hub, LLC. Further, the amounts for the acquired assets are averaged over the period owned, not over the entire year.

(3)Includes 100 percent of the volumes associated with operated equity-method investments Gulfstream and Discovery, prior to the acquisition of the remaining 40 percent interest in Discovery on August 1, 2024. Volumes associated with the Discovery assets for 2024 are presented entirely in the Consolidated section.

Northeast G&P

Natural Gas Gathering and Processing Assets

This segment includes Williams’ natural gas gathering, compression, processing, and NGL fractionation businesses in the Marcellus and Utica Shale regions in Pennsylvania, West Virginia, New York, and Ohio.

The following tables summarize the significant operated assets of this segment:


	Natural Gas Gathering Assets
	Location	Pipeline Miles	Inlet Capacity (Bcf/d)	Ownership Interest	Supply Basins
Consolidated:
Ohio Valley Midstream (1)	Ohio, West Virginia, & Pennsylvania	216	0.8	65%	Appalachian
Utica East Ohio Midstream (1) (2)	Ohio	53	0.6	65%	Appalachian
Susquehanna Supply Hub	Pennsylvania & New York	506	4.6	100%	Appalachian
Cardinal (1)	Ohio	429	0.7	66%	Appalachian
Flint	Ohio	100	0.5	100%	Appalachian

Non-consolidated: (3)
Bradford Supply Hub	Pennsylvania	754	4.4	66%	Appalachian
Marcellus South	Pennsylvania & West Virginia	296	1.3	68%	Appalachian
Laurel Mountain	Pennsylvania	1,147	0.9	69%	Appalachian
Blue Racer	Ohio & West Virginia	617	2.0	50%	Appalachian


	Natural Gas Processing Facilities
	Location	Inlet Capacity (Bcf/d)	NGL Production Capacity (Mbbls/d)	Ownership Interest	Supply Basins
Consolidated: (1)
Fort Beeler	Marshall Co., WV	0.5	62	65%	Appalachian
Oak Grove	Marshall Co., WV	0.6	75	65%	Appalachian
Kensington	Columbiana Co., OH	0.6	68	65%	Appalachian
Leesville	Carroll Co., OH	0.2	18	65%	Appalachian

Non-consolidated: (3)
Berne	Monroe Co., OH	0.4	60	50%	Appalachian
Natrium	Marshall Co., WV	0.8	120	50%	Appalachian

_____________

(1)Statistics reflect 100 percent of the assets from Williams’ 65 percent ownership in its Northeast JV and 66 percent ownership of Cardinal gathering system.

(2)Utica East Ohio Midstream inlet capacity consists of 1.3 Bcf/d of a high-pressure gathering pipeline that delivers Cardinal gathering volumes to Utica East Ohio Midstream processing facilities. The listed inlet capacity of 0.6 Bcf/d is incremental capacity to the Cardinal gathering capacity of 0.7 Bcf/d.

(3)Includes 100 percent of the statistics associated with operated equity-method investments.

Other NGL Operations

As part of its Northeast G&P business, Williams owns and operates a 43 Mbbls/d NGL fractionation facility at Moundsville, West Virginia, nearby condensate stabilization facilities capable of handling approximately 17 Mbbls/d of field condensate, a de-ethanization facility at its Oak Grove processing plant, an ethane pipeline, and an NGL pipeline. The Oak Grove de-ethanizer is capable of handling up to approximately 80 Mbbls/d of mixed NGLs to extract up to approximately 40 Mbbls/d of ethane. Williams also owns and operates a 135 Mbbls/d NGL fractionation facility and approximately 970,000 barrels of NGL storage capacity in Harrison County, Ohio, as well as 44 Mbbls/d of condensate stabilization capacity, and other ancillary assets, including loading and terminal facilities in Harrison, Carroll, and Columbiana Counties, Ohio.

NGLs are extracted from the natural gas stream in Williams’ Oak Grove and Fort Beeler cryogenic processing plants. Ethane produced at the Oak Grove de-ethanizer is transported to markets via its 50-mile ethane pipeline to Houston, Pennsylvania. The remaining mixed NGL stream from the de-ethanizer is then transported via Williams’

50-mile NGL pipeline and fractionated at either its Moundsville or Harrison fractionation facility. The resulting products are then transported on truck, rail, or pipeline. Ohio Valley Midstream provides residue natural gas take away options for customers with interconnections to three interstate transmission pipelines.

Certain Equity-Method Investments

Appalachia Midstream Investments

Through the Appalachia Midstream Investments, Williams operates and owns an approximate average 66 percent interest in the Bradford Supply Hub gathering system and owns an approximate average 68 percent interest in the Marcellus South gathering system, together which consist of approximately 1,050 miles of gathering pipeline in the Marcellus Shale region with the capacity to gather 5,700 MMcf/d of natural gas. The majority of Williams’ volumes in the region are gathered from northern Pennsylvania, southwestern Pennsylvania, and the northwestern panhandle of West Virginia in core areas of the Marcellus Shale. Williams operates the assets primarily under long-term, 100 percent fixed-fee gathering agreements that include significant acreage dedications. Additionally, some Marcellus South agreements have MVCs.

Laurel Mountain

Williams operates and owns a 69 percent interest in a joint venture, Laurel Mountain, which includes a 1,147-mile gathering system in western Pennsylvania with the capacity to gather 0.9 Bcf/d of natural gas. Laurel Mountain has a long-term, dedicated, volumetric-based fee agreement, with exposure to natural gas prices, to gather the anchor customer’s production in the western Pennsylvania area of the Marcellus Shale. Additionally, certain Laurel Mountain agreements have MVCs.

Blue Racer

Williams operates and owns a 50 percent interest in Blue Racer. Blue Racer is a joint venture to own, operate, develop, and acquire midstream assets in the Utica Shale and certain adjacent areas in the Marcellus Shale. Blue Racer’s assets include 617 miles of gathering pipelines and the Natrium complex in Marshall County, West Virginia, with a cryogenic processing capacity of 800 MMcf/d and fractionation capacity of approximately 134 Mbbls/d. Blue Racer also owns the Berne complex in Monroe County, Ohio, with a cryogenic processing capacity of 400 MMcf/d, and 102 miles of NGL and condensate pipelines connecting Natrium to Berne. Blue Racer provides gathering, processing, and marketing services primarily under percent-of-liquids and fixed-fee agreements.

Northeast G&P Operating Statistics


	2024	2023	2022
	(Annual Average Amounts)
Consolidated:
Gathering volumes (Bcf/d)	4.16	4.45	4.19
Plant inlet natural gas volumes (Bcf/d)	1.86	1.89	1.65
NGL production (Mbbls/d)	139	139	120
NGL equity sales (Mbbls/d)	1	1	1

Non-consolidated: (1)
Gathering volumes (Bcf/d)	6.46	6.92	6.61
Plant inlet natural gas volumes (Bcf/d)	0.98	0.93	0.71
NGL production (Mbbls/d)	72	65	51
NGL equity sales (Mbbls/d)	5	4	3

__________

(1) Includes 100 percent of the volumes associated with operated equity-method investments, including Laurel Mountain and Blue Racer; as well as the Bradford Supply Hub and Marcellus South within Appalachia Midstream Investments.

West

Natural Gas Gathering and Processing Assets

The following tables summarize the significant operated assets of this segment:


	Natural Gas Gathering Assets
	Location	Pipeline Miles	Inlet Capacity (Bcf/d)	Ownership Interest	Supply Basins/Shale Formations
Consolidated:
Wamsutter	Wyoming	2,251	0.7	100%	Wamsutter
Southwest Wyoming	Wyoming	1,613	0.5	100%	Southwest Wyoming
Piceance	Colorado	352	1.8	100%	Piceance
Barnett Shale	Texas	815	0.5	100%	Barnett Shale
Eagle Ford Shale	Texas	1,258	0.5	100%	Eagle Ford Shale
Haynesville Shale	Louisiana & Texas	869	5.0	100%	Haynesville Shale, Bossier Shale
Permian	Texas	113	0.1	100%	Permian
Mid-Continent	Oklahoma & Texas	1,695	0.2	100%	Miss-Lime, Granite Wash, Colony Wash
DJ Basin	Colorado	472	0.8	100%	Denver-Julesburg


	Natural Gas Processing Facilities
	Location	Inlet Capacity (Bcf/d)	NGL Production Capacity (Mbbls/d)	Ownership Interest	Supply Basins
Consolidated:
Echo Springs	Echo Springs, WY	0.6	48	100%	Wamsutter
Opal	Opal, WY	0.7	39	100%	Southwest Wyoming
Willow Creek	Rio Blanco Co., CO	0.5	30	100%	Piceance
Parachute	Garfield Co., CO	1.0	5	100%	Piceance
Fort Lupton	Weld Co., CO	0.3	50	100%	Denver-Julesburg
Keenesburg I	Weld Co., CO	0.2	40	100%	Denver-Julesburg
Front Range	Weld Co., CO	0.1	12	100%	Denver-Julesburg

DJ Basin Acquisitions

On November 30, 2023, Williams closed on the acquisition of 100 percent of Cureton Front Range, LLC and the acquisition of the remaining 50 percent interest in Rocky Mountain Midstream Holdings LLC, both of which operate midstream assets in Colorado’s DJ Basin. The Cureton Acquisition includes natural gas gathering pipelines and one in-service processing plant. The RMM Acquisition was the purchase of a partner’s 50 percent interest, resulting in 100 percent ownership by Williams. RMM includes a natural gas gathering pipeline, an approximate 100-mile crude oil transportation pipeline, and natural gas processing assets in the DJ Basin. It also includes crude oil storage and compression assets.

Trace Acquisition

On April 29, 2022, Williams closed on the acquisition of 100 percent of Gemini Arklatex, LLC, through which the gas gathering and related assets of Trace Midstream were acquired. The purpose of this acquisition was to expand Williams’ footprint into the east Texas area of the Haynesville Shale region, increasing in-basin scale.

Other NGL Operations

Williams owns interests in and/or operates NGL fractionation and storage assets in central Kansas near Conway. These assets include a 50 percent interest in an NGL fractionation facility with capacity of slightly more than 100 Mbbls/d and also approximately 23 million barrels of NGL storage capacity. In addition, Williams owns a 189-mile NGL pipeline from a fractionator near Conway, Kansas, to an interconnection with a third-party NGL pipeline system in Oklahoma.

Overland Pass Pipeline Equity-Method Investment

Williams operates and owns a 50 percent interest in OPPL. OPPL is capable of transporting 245 Mbbls/d of NGLs and includes 1,035 miles of NGL pipeline extending from Opal, Wyoming, to the Mid-Continent NGL market center near Conway, Kansas, along with extensions into the Piceance and DJ basins in Colorado and the Bakken Shale in the Williston basin in North Dakota. The equity NGL volumes from Williams’ Wyoming plants as well as certain Colorado plants are dedicated for transport on OPPL under long-term transportation agreements.

West Operating Statistics


	2024	2023	2022
	(Annual Average Amounts)
Consolidated:
Gathering volumes (Bcf/d) (1)	5.46	6.02	5.19
Plant inlet natural gas volumes (Bcf/d)	1.54	1.54	1.15
NGL production (Mbbls/d)	90	91	43
NGL equity sales (Mbbls/d)	7	14	14
Non-Consolidated: (2)
Gathering volumes (Bcf/d)	—	—	0.29
Plant inlet natural gas volumes (Bcf/d)	—	—	0.28
NGL production (Mbbls/d)	—	—	33

________________

(1) Includes volumes for gathering assets acquired in the Trace Acquisition after the purchase on April 29, 2022 as well as volumes for gathering assets acquired in the DJ Basin Acquisitions after the purchase on November 30, 2023. Further, the amounts for the acquired assets are averaged over the period owned, not over the entire year.

(2) Includes 100 percent of the volumes associated with operated equity-method investment RMM prior to acquisition of the remaining 50 percent interest on November 30, 2023. Volumes associated with the RMM assets for 2023 are presented entirely in the Consolidated section.

Gas & NGL Marketing Services

Williams’ natural gas marketing business provides asset management and the wholesale marketing, trading, storage, and transportation of natural gas for a diverse set of natural gas and electric utilities, municipalities, power generators, and producers and markets natural gas from the production at its upstream properties. Williams’ NGL marketing business transports and markets its equity NGLs from the production at its processing plants, NGLs from the production at its upstream properties, and NGLs on behalf of third-party NGL producers, including some of its fee-based processing customers. See the Gas and NGL Marketing section of Service Assets, Customers, and Contracts in Item 1. Business for additional information related to this business segment.

Gas & NGL Marketing Services Operating Statistics


	2024	2023	2022
	(Annual Average Amounts)
Sales Volumes:
Natural Gas (Bcf/d)	7.11	7.05	7.20
NGLs (Mbbls/d)	177	223	250

Other

Other includes upstream operations, certain new energy ventures, and minor business activities that are not reportable segments, as well as corporate operations.

Upstream Ventures

Williams acquired certain crude oil and natural gas properties in the Wamsutter basin in February 2021. Williams had an agreement regarding these properties in which it owned 75 percent of the venture’s undivided interest in each well’s working interest. In November 2024, Williams closed on the acquisition of the third-party operator Crowheart Energy, LLC. After closing on the acquisition Williams is the operator and owns more than a 90 percent working interest in each well.

Certain natural gas properties in Louisiana were transferred to Williams in November 2020 as part of a bankruptcy resolution with a customer. In the third quarter of 2021, Williams sold 50 percent of the existing wells and wellbore rights in the South Mansfield area of the Haynesville Shale region to a third party operator, in a strategic effort to develop the acreage, thereby enhancing the value of Williams midstream natural gas infrastructure. Under the agreement, the third party operates the upstream position and develops the undeveloped acreage. The third-party’s interest in new wells increased to 75 percent in early 2023 when a certain drilling hurdle was met. Williams retained ownership in the undeveloped acreage until a separate acreage earning hurdle was met in the fourth quarter of 2023, at which time remaining undeveloped acreage was conveyed to the third party resulting in the third party owning 75 percent and Williams owning 25 percent.

Operating Statistics


	2024 (1)	2023	2022
	(Annual Average Amounts)
Net Product Sales Volumes:
Natural Gas (Bcf/d)	0.31	0.29	0.22
NGLs (Mbbls/d)	11	7	7
Crude Oil (Mbbls/d)	6	4	2

________________

(1) Includes volumes for the Crowheart Acquisition after the purchase on November 1, 2024. Further, the amounts for the acquired assets are averaged over the period owned, not over the entire year.

New Energy Ventures

Williams’ Other segment also includes investments in certain new energy ventures related to hydrogen, solar, renewable natural gas, and NextGen Gas. NextGen Gas is natural gas that has been independently certified as low emissions gas across all segments of the value chain.

Rate Matters

FERC regulation requires all terms and conditions of service, including the rates charged, to be filed with and accepted by the FERC before any changes can go into effect. Our interstate natural gas pipelines establish their rates primarily through the FERC’s ratemaking process, but also may negotiate rates with their customers pursuant to the terms of their tariff and FERC policy. Key determinants in the ratemaking process are: (1) costs of providing service, including depreciation expense; (2) allowed rate of return, including the equity component of the capital structure and related income taxes; and (3) contract and volume throughput assumptions. The allowed rate of return is determined in each rate case. Rate design and the allocation of costs between the reservation and commodity rates also impact profitability. As a result of rate case proceedings, certain revenues may be collected subject to refund. Estimates of rate refund liabilities may be recorded considering their and third-party regulatory proceedings, advice of counsel and other risks.

Consistent with FERC policy, our interstate natural gas pipelines design their rates using the straight fixed-variable (SFV) method of rate design. Under the SFV method of rate design, substantially all fixed costs, including

return on equity and income taxes, are included in a reservation charge to customers and all variable costs are recovered through a commodity charge to customers. While the use of SFV rate design limits our pipelines’ opportunity to earn incremental revenues through increased throughput, it also limits their risk associated with fluctuations in throughput.

Transco Rate Case Filing

On August 30, 2024, Transco filed a general rate case with the FERC for an overall increase in rates. In September 2024, with the exception of certain rates that reflected a rate decrease, the FERC accepted and suspended our general rate filing to be effective March 1, 2025, subject to refund and the outcome of hearing procedures established by the FERC. The specific rates that reflected a rate decrease were accepted, without suspension, to be effective October 1, 2024, as requested by Transco, and will not be subject to refund. The impact of the rates reflecting a rate decrease is expected to reduce revenues by approximately $1 million per month beginning October 1, 2024.

NWP Rate Case Settlement

On November 15, 2022, the FERC approved NWP’s Petition for Approval of Pre-Filing Stipulation and Settlement Agreement (Settlement) in Docket No. RP22-1155. The Settlement established a new general system firm Rate Schedule TF-1 (Large Customer) daily reservation rate of $0.37250/Dth with a $0.00935/Dth commodity rate (which were made effective January 1, 2023), resolved other rate issues, established a Modernization and Emission Reduction Program and satisfied our rate case filing obligation under our settlement in Docket No. RP17-346. Provisions were included in the Settlement that establish a moratorium on any NGA Section 4 or 5 proceedings that would seek to place new rates in effect any earlier than January 1, 2026. The Settlement also provides that Northwest Pipeline file an NGA Section 4 general rate case with rates to be effective not later than April 1, 2028, unless (a) Northwest Pipeline has entered into a pre-filing settlement or (b) a Section 5 general rate case has been filed on or before April 1, 2028.

As a result of the Settlement, in January 2023, NWP refunded approximately $126 million, including interest, associated with the decrease in federal tax rates due to the Tax Cuts and Jobs Act of 2017 (Tax Reform), which reduced current Regulatory liabilities on NWP’s Balance Sheet.

Regulatory Matters

FERC

Williams’ natural gas pipeline interstate transmission and storage activities, including activities of Transco and NWP, are subject to FERC regulation under the NGA and under the Natural Gas Policy Act of 1978, as amended, and, as such, the rates and charges for the transportation of natural gas in interstate commerce, accounting, and the extension, enlargement, or abandonment of the jurisdictional facilities, among other things, are subject to regulation. Each of Williams’ natural gas pipeline companies, including Transco and NWP, holds certificates of public convenience and necessity issued by the FERC authorizing ownership and operation of all pipelines, facilities, and properties for which certificates are required under the NGA. FERC Standards of Conduct govern how the interstate pipelines communicate and conduct transmission transactions with an affiliate that engages in marketing functions. Among other things, the Standards of Conduct require that interstate gas pipelines treat all transmission customers, affiliated and non-affiliated, on a not unduly discriminatory basis. FERC Standards of Conduct govern the relationship between natural gas transmission providers and marketing function employees as defined by the rule. The Standards of Conduct are intended to prevent natural gas transmission providers from preferentially benefiting gas marketing functions by requiring the employees of a transmission provider that perform transmission functions to function independently from marketing function employees and by restricting the information that transmission providers may provide to marketing function employees. Under the Energy Policy Act of 2005, the FERC is authorized to impose civil penalties of more than $1.5 million per day for each violation of its rules.

FERC regulation requires all terms and conditions of service, including the rates charged, to be filed with and accepted by the FERC before any changes can go into effect. Williams’ interstate gas pipeline companies, including

Transco and NWP, establish rates through the FERC’s ratemaking process. In addition, Williams’ interstate gas pipelines, including Transco and NWP, may enter into agreements with customers for negotiated rates, which may be less than, equal to, or greater than the otherwise applicable cost-based recourse rates. Williams, including Transco, has also received authority to charge market-based rates for certain of our storage services. Key determinants in the FERC ratemaking process include:

•Costs of providing service, including depreciation expense;

•Allowed rate of return, including the equity component of the capital structure and related income taxes;

•Contract and volume throughput assumptions.

The allowed rate of return is determined in each rate case. Rate design and the allocation of costs between the reservation and commodity rates also impact profitability. During the pendency of rate case proceedings, certain revenues collected may be subject to refund.

Williams also owns interests in and operates natural gas liquids pipelines that are regulated by various federal and state governmental agencies. Services provided on the interstate natural gas liquids pipelines are subject to regulation under the Interstate Commerce Act by the FERC, which has authority over the terms and conditions of service; rates, including depreciation and amortization policies; and initiation of service. Williams’ intrastate natural gas liquids pipelines providing common carrier service are subject to regulation by various state regulatory agencies.

Updated Certificate Policy Statement and Interim Greenhouse Gas (GHG) Policy Statement

On February 18, 2022, the FERC issued an Updated Certificate Policy Statement and an Interim GHG Policy Statement, which were to provide guidance for consideration of interstate natural gas pipeline projects. The Updated Certificate Policy Statement was intended to provide an analytical framework for how the FERC would consider whether a project is in the public convenience and necessity. The Interim GHG Policy Statement was intended to set forth how the FERC would assess the impacts of natural gas infrastructure projects on climate change in its reviews under the National Environmental Policy Act and the NGA. On March 24, 2022, the FERC converted the Updated Certificate Policy Statement and the Interim GHG Policy Statement into draft policy statements, and on January 24, 2025, the FERC terminated the Interim GHG Policy Statement proceeding. The FERC has not yet issued final guidance on the Updated Certificate Policy Statement.

Pipeline Safety

Williams’ interstate natural gas pipelines, including Transco and NWP, are subject to the Natural Gas Pipeline Safety Act of 1968, as amended, the Pipeline Safety Improvement Act of 2002, the Pipeline Safety, Regulatory Certainty, and Jobs Creation Act of 2011, and the Protecting Our Infrastructure of Pipelines and Enhancing Safety Act of 2016 and 2020, which regulate safety requirements in the design, construction, operation, and maintenance of interstate natural gas transmission facilities. The United States Department of Transportation Pipeline and Hazardous Materials Safety Administration (PHMSA) administers federal pipeline safety laws.

Federal pipeline safety laws authorize PHMSA to establish minimum safety standards for pipeline facilities and persons engaged in the transportation of gas or hazardous liquids by pipeline. These safety standards apply to the design, construction, testing, operation, and maintenance of gas and hazardous liquids pipeline facilities affecting interstate or foreign commerce. PHMSA has also established reporting requirements for operators of gas and hazardous liquid pipeline facilities, as well as provisions for establishing the qualification of pipeline personnel and requirements for managing the integrity of gas transmission and distribution lines and certain hazardous liquid pipelines. To ensure compliance with these provisions, PHMSA performs pipeline safety inspections and has the authority to initiate enforcement actions.

In August 2022, PHMSA published Rule 2, which is the last in the three-part Mega Rule set of regulations. Rule 2 went into effect in May 2023, but a Stay of Enforcement until February 2024 limited the amount of the regulation that was implemented. Since the rule was published in 2022, Williams, including Transco and NWP, has worked to understand the regulatory changes and modify procedures as needed and will continue to monitor impacts, if any, from recently published amendments.

Pipeline Integrity Regulations

Williams has an enterprise-wide Gas Integrity Management Plan, which includes Transco and NWP, that meets the PHMSA final rule issued pursuant to the requirements of the Pipeline Safety Improvement Act of 2002. To meet the PHMSA regulations, Williams has identified all pipelines in high consequence areas (HCAs) and developed baseline assessment plans for all applicable pipelines. In response to the PHMSA Mega Rule, implemented in 2021, Williams identified Moderate Consequence Areas, and integrated those segments into its integrity program along with Class 3 and 4 pipeline locations required by the rule.

Regulatory changes as part of the Mega Rule, effective in 2024, impose stricter requirements for repairing crack-like, dent, and metal loss features. This has led to increased remediation efforts and higher costs compared to previous years. Additionally, advancements in identifying, evaluating, and remediating hard spot defects have contributed to higher spending.

Williams estimates that the cost to be incurred in 2025 with its entire Gas Integrity Management program to be approximately $219 million, which includes $168 million and $38 million for Transco and NWP, respectively. Management considers these costs to be prudent and incurred in the ordinary course of business and, the maintenance capital costs to be recoverable through rate case filings by Williams’ interstate pipelines.

Williams also has an enterprise-wide Liquid Integrity Management Plan that meets PHMSA requirements including HCA identification and a baseline assessment plan. Williams estimates that the cost to be incurred in 2025 associated with this program will be approximately $2 million. Williams considers these costs to be prudent and incurred in the ordinary course of business.

Cybersecurity Matters

In 2024, the Transportation Security Administration (TSA) issued two updated security directives to further enhance cybersecurity resilience for pipeline operators. Security Directive Pipeline-2021-01D, effective May 29, 2024, continues to require owners/operators of critical pipelines to: (1) report cybersecurity incidents to the Cybersecurity and Infrastructure Security Agency (CISA) within 24 hours; (2) designate a Cybersecurity Coordinator available 24 hours a day, seven days a week, to coordinate cybersecurity practices and incident responses; and (3) conduct comprehensive reviews of cybersecurity practices, identify gaps, and report results to TSA and CISA.

Additionally, Security Directive Pipeline-2021-02E, effective July 27, 2024, builds on previous directives by requiring pipeline operators to: (1) implement a TSA-approved Cybersecurity Implementation Plan, incorporating network segmentation, continuous monitoring, and access control measures; (2) develop and maintain a robust Cybersecurity Incident Response Plan to reduce risks to critical systems during an incident; and (3) establish a Cybersecurity Assessment Plan with annual updates and reports to evaluate the effectiveness of implemented measures and identify vulnerabilities.

Williams, including Transco and NWP, has established and received TSA approval for its Cybersecurity Implementation Plan and Cybersecurity Assessment Plan, and is compliant with the remaining requirements established in Security Directives 1D and 2E.

Additionally, the United States Coast Guard issued a final rule in January 2025, establishing baseline cybersecurity requirements for maritime transportation assets, including vessels and facilities regulated under the Maritime Transportation Security Act. This rule mandates the development and maintenance of a Cybersecurity Plan, designation of a Cybersecurity Officer, implementation of security measures for account, device, and data protection, regular cybersecurity assessments, and reporting of cyber incidents. Compliance timelines for these requirements are phased, with key milestones such as cybersecurity assessments and plan submissions required within 24 months of the rule’s effective date.

Williams is actively monitoring evolving regulatory requirements to ensure compliance across its operations, including Transco and NWP. Williams is assessing the applicability of various regulations to its assets and implementing necessary measures to align with these standards. Williams, including Transco and NWP, remains

committed to safeguarding its infrastructure, minimizing risks, and maintaining the resilience of its operations in the face of evolving cybersecurity threats

See Part I, Item 1A. “Risk Factors” — “A breach of information technology infrastructure, including a breach caused by a cybersecurity attack on Williams, Transco, or NWP, or the third parties with whom they are interconnected, may interfere with the safe operation of assets, result in the disclosure of personal or proprietary information, and cause reputational harm.”

Gathering Regulations

Williams’ onshore midstream gathering operations are subject to laws and regulations in the various states in which it operates. For example, the Texas Railroad Commission has the authority to regulate the terms of service for Williams’ intrastate natural gas gathering business in Texas. Although the applicable state regulations vary widely, they generally require that pipeline rates and practices be reasonable and nondiscriminatory, and may include provisions covering marketing, pricing, pollution, environment, and human health and safety. Some states, such as New York and Ohio, have specific regulations pertaining to the design, construction, and operations of gathering lines within such state.

Williams has been actively implementing PHMSA’s 2021 Gas Gathering final rule that requires all onshore gas gathering lines to report incidents and file annual reports. The final rule also established a new Type C regulated gathering line and now requires Type C gathering lines to comply with specifically identified PHMSA regulations in 49 Code of Federal Regulations Part 192. Since the rule was published, Williams has worked to understand the regulatory changes and modify our procedures as needed.

Liquids Pipelines

Williams’ liquids pipelines are regulated by the Louisiana Department of Natural Resources, the Texas Railroad Commission, and various other state and federal agencies. These pipelines are also subject to the liquid pipeline safety and integrity regulations discussed above since both Louisiana and Texas have adopted the integrity management regulations defined in PHMSA.

Outer Continental Shelf Lands Act

Williams’ offshore gas and liquids pipelines located on the outer continental shelf, including Transco, are subject to the Outer Continental Shelf Lands Act, which provides in part that outer continental shelf pipelines “must provide open and nondiscriminatory access to both owner and non-owner shippers.”

See Part I, Item 1A. “Risk Factors” — “The operation of Williams’, Transco’s, and NWP’s businesses might be adversely affected by regulatory proceedings, changes in government regulations or in their interpretation or implementation, or the introduction of new laws or regulations applicable to Williams’, Transco’s, and NWP’s businesses or customers,” and “The natural gas sales, transportation, and storage operations of Williams’, Transco’s, and NWP’s natural gas pipelines are subject to regulation by the FERC, which could have an adverse impact on their ability to establish transportation and storage rates that would allow them to recover the full cost of operating their respective pipelines and storage assets, including a reasonable rate of return.”

Environmental Matters

Williams’ operations, including Transco and NWP, are subject to federal environmental laws and regulations as well as the state, local, and tribal laws and regulations adopted by the jurisdictions in which they operate. Williams, Transco, and NWP could incur liability to governments or third parties for any unlawful discharge of pollutants into the air, soil, or water, as well as liability for cleanup costs. Materials could be released into the environment in several ways including, but not limited to:

•Leakage from gathering systems, underground gas storage caverns, pipelines, processing or treating facilities, transportation facilities, and storage tanks;

•Damage to facilities resulting from accidents during normal operations;

•Damages to onshore and offshore equipment and facilities resulting from storm events or natural disasters;

•Blowouts, cratering, and explosions.

In addition, Williams, Transco, and NWP may be liable for environmental damage caused by former owners or operators of our properties.

Williams, Transco, and NWP believe compliance with current environmental laws and regulations will not have a material adverse effect on their capital expenditures, earnings, or current competitive position. However, environmental laws and regulations could affect their business in various ways from time to time, including incurring capital and maintenance expenditures, fines and penalties, and creating the need to seek relief from the FERC for rate increases to recover the costs of certain capital expenditures and operation and maintenance expenses.

NWP - Washington State Climate Commitment Act

In 2021, the state of Washington passed its Climate Commitment Act establishing a market-based cap-and-invest program to reduce carbon emissions. This program took effect on January 1, 2023, and sets a limit, or cap, on overall carbon emissions in the state and requires businesses like NWP to obtain allowances equal to their annual covered carbon emissions. The state’s cap will be reduced over time to meet the state’s carbon emissions reduction targets, which means fewer carbon emissions allowances will be available to purchase each year. These allowances can be purchased through quarterly auctions hosted by the state or bought and sold on a secondary market. In 2023, NWP began purchasing allowances for the carbon emissions from nine of its thirteen compressor stations within the state whose annual carbon emissions have exceeded 25,000 metric tons of carbon dioxide equivalent at least once since 2015. NWP also began purchasing allowances for NWP’s delivery of natural gas to certain of their customers and certain of their facilities in the state whose annual carbon emissions are insufficient to require their direct participation in the program. NWP’s latest rate case settlement allows them to recover the costs of purchasing allowances under the program in their next rate case.

For additional information regarding the potential impact of federal, state, tribal, or local regulatory measures on business and specific environmental issues, please refer to Part 1, Item 1A. “Risk Factors” — “Williams’, Transco’s, and NWP’s operations are subject to environmental laws and regulations, including laws and regulations relating to climate change and greenhouse gas emissions, which may expose them to significant costs, liabilities, and expenditures that could exceed expectations,” and Part II, Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Environmental” and “Environmental Matters” in Part II, Item 8. Financial Statements and Supplementary Data — Note 18 – Contingencies and Commitments.

Competition

Williams’ competitive strategy spans all of its product and service offerings. Williams has a narrowed natural gas value chain focus that supports the exceptional reliability and quality services that are valued by our customers.

Gathering and Processing

Competition for natural gas gathering, processing, treating, transportation, and storage, as well as NGLs transportation, fractionation, and storage continues to increase as United States production continues to grow. Williams’ midstream services compete with similar facilities that are in close proximity to its assets.

Williams faces competition from companies of varying size and financial capabilities, including major and independent natural gas midstream providers, private equity firms, and major integrated oil and natural gas companies that gather, transport, process, fractionate, store, and market natural gas and NGLs, as well as some larger exploration and production companies that are choosing to develop midstream services to handle their own natural gas.

Williams’ gathering and processing agreements are generally long-term agreements that may include acreage dedication. Competition for natural gas volumes is primarily based on reputation, flexibility of commercial terms (including but not limited to fees charged, products retained, volume commitments), available capacity, array and quality of services provided, as well as efficiency, reliability, and safety of services. Williams believes its significant

presence in key supply basins, expertise and reputation as a reliable and safe operator, commitment to sustainability, and ability to offer integrated packages of services positions it well against competition.

Regulated Interstate Natural Gas Transportation and Storage

The market for supplying natural gas is highly competitive and new pipelines, storage facilities, and other related services are expanding to service the growing demand for natural gas. Additionally, pipeline capacity in many natural gas supply basins is constrained and facing more regulation and opposition causing competition to increase among pipeline companies as they strive to connect those basins to major natural gas demand centers.

Williams predominately competes with major intrastate and interstate natural gas pipelines. Some local distribution companies are also involved in the long-haul transportation business through joint venture pipelines. The principle elements of competition in the interstate natural gas pipeline business are based on available capacity, rates, reliability, quality of customer service, diversity and flexibility of supply, and proximity or access to customers and market hubs.

Williams faces competition in a number of key markets, and competes with other interstate and intrastate pipelines for deliveries to customers who can take deliveries at multiple points. Natural gas delivered on Williams’ system competes with alternative energy sources used to generate electricity such as hydroelectric power, solar, wind, coal, fuel oil, and nuclear. Future demand for natural gas within the power sector could be increased by growing power demand and by regulations limiting or discouraging coal use in power generation. Conversely, natural gas demand could be adversely affected by laws mandating or encouraging solar and wind power sources or restricting the use of natural gas in power generation.

Significant entrance barriers to build new pipelines exist, including increased federal and state regulations and elevated public opposition against new pipeline builds, and these factors will continue to impact potential competition for the foreseeable future. However, Williams believes past success in working with regulators and the public, the position of its existing infrastructure, established strategic long-term contracts, and the fact that Williams’ pipelines have numerous receipt and delivery points provide it a competitive advantage, especially along the eastern seaboard and northwestern United States.

Energy Management and Marketing Services

Williams’ Gas & NGL Marketing Services segment competes with national and regional full-service energy providers, producers, and pipeline marketing affiliates or other marketing companies that aggregate commodities with transportation and storage capacity.

For additional information regarding competition for Williams services or otherwise affecting our business, please refer to Part 1, Item 1A. “Risk Factors” - “The business, operating results, and financial condition of Williams’, Transco’s, and NWP’s natural gas transportation and midstream businesses are dependent on the continued availability of natural gas supplies in the supply basins and demand for those supplies in the markets that they serve,” “The energy industry is highly competitive, and increased competitive pressure could adversely affect Williams’, Transco’s, and NWP’s businesses and operating results,” and “Williams, Transco, and NWP may not be able to replace, extend, or add additional customer contracts or contracted volumes on favorable terms, or at all, as applicable, which could affect Williams’, Transco’s, and NWP’s financial condition and ability to grow, as well as the amount of cash available to Williams to pay dividends.”

Human Capital Resources

Williams is committed to maintaining a work environment that enables Williams to attract, develop, and retain a highly skilled and diverse group of talented employees who help promote long-term value creation now and into the clean energy future.

Employees

As of February 1, 2025, Williams had 5,829 full-time employees located throughout the United States. During 2024, Williams’ voluntary turnover rate was 5.0 percent.

Transco and NWP have no employees. Operations, management and certain administrative services are provided by Williams for both Transco and NWP.

Williams’ 2023 Sustainability Report is available on its website for more information about human capital programs and initiatives. The 2024 Sustainability Report will be available in the summer of 2025. Nothing on Williams’ website shall be deemed incorporated by reference into this Annual Report on Form 10-K.

Workforce Safety

Williams continues to advance a safety-first culture by developing and empowering employees to operate assets in a safe, reliable, and customer-focused way. Williams strives to continuously improve safety and implement best practices to progress towards zero safety incidents. When a safety hazard is recognized, every employee has the authority and responsibility to stop work activities, make changes to enhance safety, and share the lessons learned with the organization on how we made it right.

Williams includes three safety and environmental metrics as a part of its Annual Incentive Program design. For 2024, these goals included Critical Tier 3 Loss of Primary Containment (LOPC) Ratio, a High Potential Hazard Identification to Incident Ratio goal aimed to focus attention on behaviors that are the leading causes of incidents, as well as a Methane Emissions Reduction goal focusing on efforts to reduce greenhouse gas emissions by safely and reliably operating and maintaining assets. These three metrics comprise 15 percent of Williams annual incentive program for eligible employees, and reinforce the importance of incident prevention and a commitment to environmental and safety-focused improvements.

For 2024, the LOPC Ratio, High Potential Hazard Identification to Incident Ratio and Methane Emissions Reduction goals outperformed the established targets.

Workforce Health, Engagement, and Development

Williams’ employees are its most valued resource, are instrumental in our mission to safely deliver products that support the clean energy economy, and are the driving force behind Williams’ reputation as a safe, reliable company that does the right thing, every time. Cultivating a healthy work environment increases productivity, enhances employee satisfaction, and promotes long-term value creation.

Williams provides a competitive total rewards program that includes base salary, an annual incentive program, retirement benefits, and health benefits, including wellness and employee assistance programs. Williams provides employees with company-paid life insurance, disability coverage, and paid parental leave for both birth and non-birth parents, as well as adoption assistance. The annual incentive program is a key component of Williams’ commitment to a performance culture focused on recognizing and rewarding high performance.

In order to attract and retain top talent, Williams creates and is committed to maintaining a safe, inclusive workplace where employees feel valued, heard, respected, and supported in their personal and professional development. Williams leverages social and digital platforms like a careers site, external job boards, virtual and in-person career fairs and community events to attract candidates who have the specific skills we need. Further, leaders participate in inclusion training and utilize interview guides with collaboration and inclusion-focused questions to ensure they are equipped with interviewer best practices that help them holistically evaluate candidates. Williams utilizes employee surveys and employee-led advisory councils to understand the needs of the business from the perspective of employees regarding engagement, development and inclusion. Additionally, Williams supports employee engagement through formal programming including professional development, mentoring, and succession planning.

Williams provides extensive corporate and technical training programs that are agile and robust. These programs are designed to support the professional, skill, and technological development of employees, which in turn creates a competitive advantage. Williams is committed to adding long-term value by investing in employees’ growth and development. In addition to internal development programming, Williams also supports external development opportunities to further enhance employees’ professional and technical skills. Performance is measured considering both the achieved results associated with attaining annual goals and the observable skills and behaviors based on defined competencies that contribute to workplace effectiveness and career success. All formal leaders are

evaluated on two additional competencies around building inclusive, high-performing teams. Including the defined competencies in the annual performance assessments illustrates Williams’ emphasis on, and commitment to, achieving results in the right way.

Additionally, Williams is committed to strengthening the communities where we operate through philanthropy and volunteerism. Williams supports Science, Technology, Engineering, and Math education initiatives, community benefit projects, environmental conservation, first responder efforts, and the work of United Way agencies across the United States.

The Compensation and Management Development Committee of Williams’ Board of Directors oversees executive compensation and equity-based compensation plans and the material risks associated with the compensation program, as well as the oversight elements of human capital management, including talent development and diversity and inclusion.

Inclusive Workforce

Williams is committed to creating an inclusive culture, where differences are embraced and employees feel valued, welcomed, appreciated, and compelled to reach their full potential. Williams believes that inclusion fosters innovation, collaboration, and drives business growth and long-term success. To create a culture of inclusion, Williams embraces, appreciates, and fully leverages the diversity of background and experience within teams. Williams believes that incorporating differences into a team of people who are working toward the same goal provides a competitive advantage.

To create space for employees to share personal experiences and perspectives, and to appreciate differences, Williams offers Employee Resource Groups (ERGs). These groups are employee-led and based on similar interests and experiences, represent different communities and their allies, and are open to everyone. ERG members participate in community events, volunteer, lend professional and personal support to one another, and promote inclusion across the company. Each ERG leadership team includes one or two vice president sponsors to help the group champion efforts. These leadership teams coordinate and prioritize efforts with corporate oversight and support.

Williams is committed to helping all employees develop and succeed. Williams seeks inclusive representation at all levels of the organization through our talent management practices and employee development programs, including required baseline inclusion training for all leaders across the company.

Williams’ Diversity and Inclusion Council, which includes members of the executive officer team, organizational and operational leaders, and individual employees, promotes policies, practices, and procedures that support the growth of a high-performing workforce where all individuals can achieve their full potential. The council serves as the governing body over enterprise inclusion initiatives, including events, organized and hosted by one of Williams 10 ERGs, and annual awards that recognize an outstanding leader and an individual contributor who champion inclusion.

As of December 31, 2024, Williams’ Board of Directors includes 12 members, 11 of whom are independent members, including the Chairman. As part of the director selection and nominating process, the Governance and Sustainability Committee annually assesses the Board’s effectiveness. Williams strives to maintain a board of directors with varied occupational and personal backgrounds.

Transactions with Affiliates

Transco and NWP engage in transactions with Williams and its subsidiaries. Please see Part II, Item 8. Financial Statements and Supplementary Data — Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies and Note 4 – Related Party Transactions.

Website Access To Reports and Other Information

Williams files its annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, proxy statements, and other documents electronically with the SEC under the Exchange Act.

Williams’ Internet website is www.williams.com. Williams makes available, free of charge, through the Investors tab of its Internet website its annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8‑K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after Williams electronically files such material with, or furnishes it to, the SEC. Williams Corporate Governance Guidelines, Sustainability Report, Board committee charters, and the Williams Code of Business Conduct are also available on the Internet website. Williams will also provide, free of charge, a copy of any of our corporate documents listed above upon written request to Williams’ Corporate Secretary, One Williams Center, Suite 4700, Tulsa, Oklahoma 74172.

Item 1A. Risk Factors

FORWARD-LOOKING STATEMENTS AND CAUTIONARY STATEMENT

FOR PURPOSES OF THE “SAFE HARBOR” PROVISIONS OF

THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

The reports, filings, and other public announcements of Williams, Transco, and NWP may contain or incorporate by reference statements that do not directly or exclusively relate to historical facts. Such statements are “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. These forward-looking statements relate to anticipated financial performance, management’s plans and objectives for future operations, business prospects, outcomes of regulatory proceedings, market conditions, and other matters. Williams, Transco, and NWP make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995, as applicable.

All statements, other than statements of historical facts, included in this report that address activities, events, or developments that Williams, Transco, and NWP expect, believe, or anticipate will exist or may occur in the future, are forward-looking statements. Forward-looking statements can be identified by various forms of words such as “anticipates,” “believes,” “seeks,” “could,” “may,” “should,” “continues,” “estimates,” “expects,” “forecasts,” “intends,” “might,” “goals,” “objectives,” “targets,” “planned,” “potential,” “projects,” “scheduled,” “will,” “assumes,” “guidance,” “outlook,” “in-service date,” or other similar expressions. These forward-looking statements are based on management’s beliefs and assumptions and on information currently available to management and include, among others, statements regarding:

•Levels of dividends to Williams’ stockholders;

•Future credit ratings of Transco, NWP, and Williams and its affiliates;

•Amounts and nature of future capital expenditures;

•Expansion and growth of business and operations;

•Expected in-service dates for capital projects;

•Financial condition and liquidity;

•Business strategy;

•Cash flow from operations or results of operations;

•Rate case filings;

•Seasonality of certain business components;

•Natural gas, natural gas liquids, and crude oil prices, supply, and demand;

•Demand for services.

Forward-looking statements are based on numerous assumptions, uncertainties, and risks that could cause future events or results to be materially different from those stated or implied in this report. Many of the factors that will determine these results are beyond Williams’, Transco’s, and NWP’s ability to control or predict. Specific factors that could cause actual results to differ from results contemplated by the forward-looking statements include, among others, the following:

•Availability of supplies, market demand, and volatility of prices;

•Development and rate of adoption of alternative energy sources;

•The impact of existing and future laws and regulations, the regulatory environment, environmental matters, and litigation, as well as the ability and the ability of other energy companies with whom Williams, Transco, and NWP conduct or seek to conduct business, to obtain necessary permits and approvals, and the ability to achieve favorable rate proceeding outcomes;

•Exposure to the credit risk of customers and counterparties;

•Williams’ ability to acquire new businesses and assets and successfully integrate those operations and assets into existing businesses as well as successfully expand facilities and consummate asset sales on acceptable terms;

•The ability to successfully identify, evaluate, and timely execute on capital projects and investment opportunities;

•The strength and financial resources of competitors and the effects of competition;

•The amount of cash distributions from and capital requirements of Williams’ investments and joint ventures in which Williams participates;

•The ability of Williams to effectively execute on its financing plan;

•Increasing scrutiny and changing expectations from stakeholders with respect to environmental, social, and governance practices;

•The physical and financial risks associated with climate change;

•The impacts of operational and developmental hazards and unforeseen interruptions;

•The risks resulting from outbreaks or other public health crises;

•Risks associated with weather and natural phenomena, including climate conditions and physical damage to facilities;

•Acts of terrorism, cybersecurity incidents, and related disruptions;

•Williams’ costs and funding obligations for defined benefit pension plans and other postretirement benefit plans, and Transco’s and NWP’s allocations regarding the same;

•Changes in maintenance and construction costs, as well as the ability to obtain sufficient construction- related inputs, including skilled labor;

•Inflation, interest rates, tariffs on foreign-made materials and goods (including steel and steel pipes) necessary to conduct business, and general economic conditions (including future disruptions and volatility in the global credit markets and the impact of these events on customers and suppliers);

•Risks related to financing, including restrictions stemming from debt agreements, future changes in credit ratings as determined by nationally recognized credit rating agencies, and the availability and cost of capital;

•The ability of the members of the Organization of Petroleum Exporting Countries (OPEC) and other oil exporting nations to agree to and maintain oil price and production controls and the impact on domestic production;

•Changes in the current geopolitical situation, including the Russian invasion of Ukraine and conflicts in the Middle East;

•Changes in U.S. governmental administration and policies;

•Whether Williams is able to pay current and expected levels of dividends;

•Additional risks described in Williams’, Transco’s, and NWP’s SEC filings.

Given the uncertainties and risk factors that could cause Williams’, Transco’s, and NWP’s actual results to differ materially from those contained in any forward-looking statement, Williams, Transco, and NWP caution investors not to unduly rely on these forward-looking statements. Williams, Transco, and NWP disclaim any obligations to, and do not intend to, update the above list or announce publicly the result of any revisions to any of the forward-looking statements to reflect future events or developments.

In addition to causing actual results to differ, the factors listed above and referred to below may cause Williams’, Transco’s, and NWP’s intentions to change from those statements of intention set forth in this report.

Such changes in intentions may also cause results to differ. Williams, Transco, and NWP may change intentions, at any time and without notice, based upon changes in such factors, assumptions, or otherwise.

Because forward-looking statements involve risks and uncertainties, Williams, Transco, and NWP caution that there are important factors, in addition to those listed above, that may cause actual results to differ materially from those contained in the forward-looking statements. These factors are described in the following section.

Summary of Risk Factors

You should carefully consider the following risk factors in addition to the other information in this report. Each of these factors could adversely affect Williams’, Transco’s, and NWP’s businesses, prospects, financial condition, results of operations, cash flows, and, in some cases, reputation. The occurrence of any of such risks could also adversely affect the value of an investment in securities. These factors are summarized below and described in more detail following the summary.

Risks Related to Business

•The business, operating results, and financial condition of Williams’, Transco’s, and NWP’s natural gas transportation and midstream businesses are dependent on the continued availability of natural gas supplies in the supply basins and demand for those supplies in the markets that they serve.

•Prices for natural gas, NGLs, oil, and other commodities are volatile, and this volatility has and could continue to adversely affect Williams’ financial condition, results of operations, cash flows, access to capital, and ability to maintain or grow its business.

•Significant prolonged changes in natural gas prices could affect supply and demand for Transco and NWP and cause a reduction in or termination of their long-term transportation and storage contracts or throughput on their systems.

•Williams, Transco, and NWP are exposed to the credit risk of customers and counterparties, and credit risk management will not be able to completely eliminate such risk.

•Williams, Transco, and NWP face opposition to the operation and expansion of pipelines and facilities from various individuals and groups.

•Williams, Transco, and NWP may not be able to grow or effectively manage growth.

•The energy industry is highly competitive, and increased competitive pressure could adversely affect Williams’, Transco’s, and NWP’s businesses and operating results.

•Williams does not own 100 percent of the equity interests of certain subsidiaries, including the nonconsolidated entities, which may limit its ability to operate and control these subsidiaries. Certain operations, including the nonconsolidated entities, are conducted through arrangements that may limit Williams’ ability to operate and control these operations.

•Williams, Transco, and NWP may not be able to replace, extend, or add additional customer contracts or contracted volumes on favorable terms, or at all, as applicable, which could affect Williams’, Transco’s, and NWP’s financial condition and ability to grow, as well as the amount of cash available to Williams to pay dividends.

•Certain of Williams’, Transco’s, and NWP’s natural gas pipeline services are subject to long-term, fixed-price contracts that are not subject to adjustment, even if the cost to perform such services exceeds the revenues received from such contracts.

•Some of Williams’, Transco’s, and NWP’s businesses are exposed to supplier concentration risks arising from dependence on a single or a limited number of suppliers.

•Transco and NWP depend on certain key customers for a significant portion of their revenues. The loss of any of these key customers or the loss of any contracted volumes could result in a decline in Transco’s and NWP’s respective businesses.

•Failure of service providers or disruptions to outsourcing relationships might negatively impact Williams’, Transco’s, and NWP’s ability to conduct business.

•An impairment of Williams’ assets, including property, plant, and equipment, intangible assets, and/or equity-method investments, could reduce Williams’ earnings.

•Increasing scrutiny and changing expectations from stakeholders with respect to environmental, social and governance practices may impose additional costs or risks.

•Williams, Transco, and NWP may be subject to physical and financial risks associated with climate change.

•Williams’, Transco’s, and NWP’s operations are subject to operational hazards that might result in unforeseen interruptions.

•Williams’, Transco’s, and NWP’s assets and operations, as well as their customers’ assets and operations, can be adversely affected by weather and other natural phenomena.

•Williams’, Transco’s, and NWP’s businesses could be negatively impacted by acts of terrorism and related disruptions.

•A breach of information technology infrastructure, including a breach caused by a cybersecurity attack on Williams, Transco, or NWP, or the third parties with whom they are interconnected, may interfere with the safe operation of assets, result in the disclosure of personal or proprietary information, and cause reputational harm.

•If third-party pipelines and other facilities interconnected to Williams’, Transco’s, and NWP’s pipelines and facilities become unavailable to transport natural gas and NGLs or to treat natural gas, as applicable, Williams’, Transco’s, and NWP’s revenues could be adversely affected.

•Williams’ operating results for certain components of its business might fluctuate on a seasonal basis.

•Williams, Transco, and NWP do not own all of the land on which their pipelines and facilities are located, which could disrupt operations.

•Williams’ business could be negatively impacted as a result of stockholder activism.

•Williams’ costs and funding obligations for defined benefit pension plans and other postretirement benefit plans, and Transco’s and NWP’s allocations regarding the same, are affected by factors beyond Williams’ control.

Risks Related to Financing

•A downgrade of Williams’, Transco’s, and NWP’s credit ratings, which are determined outside of their control by independent third parties, could impact liquidity, access to capital, and costs of doing business, and the ability of Transco and NWP to obtain credit in the future could be affected by Williams’ credit ratings.

•Difficult conditions in the global financial markets and the economy in general could negatively affect Williams’, Transco’s, and NWP’s businesses and results of operations.

•Restrictions in Williams’, Transco’s, and NWP’s debt agreements and the amount of indebtedness may affect future financial and operating flexibility.

•Changes to interest rates or increases in interest rates could adversely impact Williams’, Transco’s, and NWP’s access to credit, share price and ability to issue securities or incur debt for acquisitions or other purposes, as applicable, and Williams’ ability to make cash dividends at intended levels.

•Williams’ hedging activities might not be effective and could increase the volatility of Williams’ results.

•Access to capital could be affected by financial institutions’ policies concerning fossil-fuel related businesses.

•Williams can exercise substantial control over Transco’s and NWP’s distribution policies, businesses and operations and may do so in a manner that is adverse to Transco’s and NWP’s interests.

Risks Related to Regulations

•The operation of Williams’, Transco’s, and NWP’s businesses might be adversely affected by regulatory proceedings, changes in government regulations or in their interpretation or implementation, or the introduction of new laws or regulations applicable to Williams’, Transco’s, and NWP’s businesses or customers.

•The natural gas sales, transportation, and storage operations of Williams’, Transco’s, and NWP’s natural gas pipelines are subject to regulation by the FERC, which could have an adverse impact on their ability to establish transportation and storage rates that would allow them to recover the full cost of operating their respective pipelines and storage assets, including a reasonable rate of return.

•Williams’, Transco’s, and NWP’s operations are subject to environmental laws and regulations, including laws and regulations relating to climate change and greenhouse gas emissions, which may expose them to significant costs, liabilities, and expenditures that could exceed expectations.

General Risk Factors

•Williams, Transco, and NWP do not insure against all potential risks and losses and could be seriously harmed by unexpected liabilities or by the inability of insurers to satisfy claims.

•Failure to attract and retain an appropriately qualified workforce could negatively impact Williams’, Transco’s, and NWP’s results of operations.

•Holders of Williams’ common stock may not receive dividends in the amount expected or any dividends.

Risk Factors

Risks Related to Business

The business, operating results, and financial condition of Williams’, Transco’s, and NWP’s natural gas transportation and midstream businesses are dependent on the continued availability of natural gas supplies in the supply basins and demand for those supplies in the markets that they serve.

The ability of Williams, Transco, and NWP to maintain and expand their natural gas transportation and midstream businesses depends on the level of drilling and production, predominantly by third parties, in the supply basins near Williams’, Transco’s, and NWP’s pipelines and gathering systems. Production from existing wells and natural gas supply basins with access to Williams’, Transco’s, and NWP’s pipeline and gathering systems will naturally decline over time. The amount of natural gas reserves underlying these existing wells may also be less than anticipated, and the rate at which production from these reserves declines may be greater than anticipated. Williams, Transco, and NWP do not obtain independent evaluations of natural gas reserves, and thus, do not have independent estimates of total reserves dedicated to, or the anticipated life of reserves connected to, Williams’, Transco’s, and NWP’s systems and processing facilities. In addition, low prices for natural gas, regulatory limitations, including permitting and environmental regulations, or the lack of available capital have, and may continue to, adversely affect the development and production of existing or additional natural gas reserves, the installation of gathering, storage, and pipeline transportation facilities, and the import and export of natural gas suppliers. Localized low natural gas prices in one or more of the existing supply basins connected to Williams, Transco, or NWP, whether caused by a lack of infrastructure or otherwise, could also result in depressed natural gas production in such basins and limit the supply of natural gas available. The competition for natural gas supplies to serve other markets could also reduce the amount of natural gas supply for customers. A failure to obtain access to sufficient natural gas supplies will adversely impact Williams’, Transco’s, and NWP’s ability to maximize the capacities of their gathering, transportation, and processing facilities, as applicable.

Demand for Williams’, Transco’s, and NWP’s services is dependent on the demand for gas in the markets served. Demand for natural gas can be affected by weather, future industrial and economic conditions, fuel conservation measures, alternative fuel sources such as electricity, coal, fuel oils, or nuclear energy, technological advances in fuel economy, energy generation, and renewable sources of energy, and governmentally imposed constraints, such as prohibitions on natural gas hookups in newly constructed buildings, all of which are matters beyond Williams’, Transco’s, and NWP’s control.

A failure to obtain access to sufficient natural gas supplies or a reduction in demand for services in the markets served by Williams, Transco, and NWP could result in impairments of Williams’ assets and have a material adverse effect on Williams’, Transco’s, and NWP’s businesses, financial condition, results of operations, and cash flows.

Prices for natural gas, NGLs, oil, and other commodities are volatile, and this volatility has and could continue to adversely affect Williams’ financial condition, results of operations, cash flows, access to capital, and ability to maintain or grow its business.

Williams’ revenues, operating results, future rate of growth, and the value of certain components of its business depend primarily upon the prices of natural gas, NGLs, oil, or other commodities, and the differences between prices of these commodities, and could be materially adversely affected by an extended period of low commodity prices or a decline in commodity prices. Price volatility has and could continue to impact both the amount Williams receives for products and services and the volume of products and services sold. Prices affect the amount of cash flow available for capital expenditures and Williams’ ability to borrow money or raise additional capital. Price volatility has had, and could continue to have, an adverse effect on Williams’ business, results of operations, financial condition, and cash flows.

The markets for natural gas, NGLs, oil, and other commodities are likely to continue to be volatile. Wide fluctuations in prices might result from one or more factors beyond Williams’ control, including:

•Imbalances in supply and demand whether rising from worldwide or domestic supplies of and demand for natural gas, NGLs, oil, and related commodities;

•Geopolitical turmoil in the Middle East, Eastern Europe, and other producing regions;

•The activities of OPEC and other countries, whether acting independently of or informally aligned with OPEC, which have significant oil, natural gas, or other commodity production capabilities, including Russia;

•The level of consumer demand;

•The price and availability of other types of fuels or feedstocks;

•The availability of pipeline capacity;

•Supply disruptions, including plant outages and transportation disruptions;

•The price and quantity of foreign imports and domestic exports of natural gas and oil;

•Domestic and foreign governmental regulations and taxes; and

•The credit of participants in the markets where products are bought and sold.

Significant prolonged changes in natural gas prices could affect supply and demand for Transco and NWP and cause a reduction in or termination of their long-term transportation and storage contracts or throughput on their systems.

Higher natural gas prices over the long term could result in a decline in the demand for natural gas and, therefore, in Transco’s and NWP’s long-term transportation and storage contracts or throughput on their systems. Also, lower natural gas prices over the long term could result in a decline in the production of natural gas, resulting in reduced contracts or throughput on their systems. As a result, significant prolonged changes in natural gas prices could have a material adverse effect on Transco’s and NWP’s businesses, financial condition, results of operations, and cash flows.

Williams, Transco, and NWP are exposed to the credit risk of customers and counterparties, and credit risk management will not be able to completely eliminate such risk.

Williams, Transco, and NWP are subject to the risk of loss resulting from nonpayment and/or nonperformance by customers and counterparties in the ordinary course of business. Generally, Williams’, Transco’s, and NWP’s customers are rated investment grade, are otherwise considered creditworthy, are required to make prepayments or provide security to satisfy credit concerns, or are dependent upon Williams, Transco or NWP, in some cases without a readily available alternative, to provide necessary services. However, Williams’, Transco’s, and NWP’s credit

procedures and policies cannot completely eliminate customer and counterparty credit risk. Williams’, Transco’s, and NWP’s customers and counterparties include industrial customers, local distribution companies, natural gas producers, and marketers whose creditworthiness may be suddenly and disparately impacted by, among other factors, commodity price volatility, deteriorating energy market conditions, and public and regulatory opposition to energy producing activities. In a low commodity price environment, certain customers have been or could be negatively impacted, causing them significant economic stress resulting, in some cases, in a customer bankruptcy filing or an effort to renegotiate contracts. To the extent one or more of Williams’, Transco’s, or NWP’s key customers commences bankruptcy proceedings, the contracts with such customers may be subject to rejection under applicable provisions of the United States Bankruptcy Code or may be renegotiated. Further, during any such bankruptcy proceeding, prior to assumption, rejection, or renegotiation of such contracts, the bankruptcy court may temporarily authorize the payment of value for services less than contractually required, which could have a material adverse effect on Williams’, Transco’s, and NWP’s businesses, results of operations, cash flows, and financial condition. If Williams, Transco, and NWP fail to adequately assess the creditworthiness of existing or future customers and counterparties or otherwise do not take sufficient mitigating actions, including obtaining sufficient collateral, deterioration in their creditworthiness and any resulting increase in nonpayment and/or nonperformance by them could cause Williams, Transco, or NWP to write down or write off accounts receivable. Such write-downs or write-offs could negatively affect Williams’, Transco’s, or NWP’s operating results for the period in which they occur, and, if significant, could have a material adverse effect on Williams’, Transco’s, or NWP’s businesses, financial condition, results of operations, and cash flows.

Williams, Transco, and NWP face opposition to the operation and expansion of pipelines and facilities from various individuals and groups.

Williams, Transco, and NWP have experienced, and anticipate continuing to face, opposition to the operation and expansion of pipelines and facilities from governmental officials, environmental groups, landowners, tribal groups, local groups, and other advocates. In some instances, Williams, Transco, and NWP encounter opposition that disfavors hydrocarbon-based energy supplies regardless of practical implementation or financial considerations. Opposition to operation and expansion can take many forms, including the delay or denial of required governmental permits, organized protests, attempts to block or sabotage operations, intervention in regulatory or administrative proceedings involving assets, or lawsuits or other actions designed to prevent, disrupt, or delay the operation or expansion of assets and business. In addition, acts of sabotage or eco-terrorism could cause significant damage or injury to people, property, or the environment or lead to extended interruptions of operations. Any such event that delays or prevents the expansion of Williams’, Transco’s, or NWP’s businesses, that interrupts the revenues generated by operations, or that causes significant expenditures not covered by insurance, could adversely affect Williams’, Transco’s, and NWP’s financial condition and results of operations.

Williams, Transco, and NWP may not be able to grow or effectively manage growth.

As part of Williams’ growth strategy, Williams considers acquisition opportunities. Suitable acquisition candidates or assets may not be available on terms and conditions Williams finds acceptable or, where multiple parties are trying to acquire an acquisition candidate or assets, Williams may not be chosen as the acquirer. If Williams is able to acquire a targeted business, Williams may not be able to successfully integrate the acquired businesses and realize anticipated benefits in a timely manner.

Additionally, as part of Williams’, Transco’s, and NWP’s growth strategy, Williams, Transco, and NWP engage in significant capital projects and have both a project lifecycle process and an investment evaluation process. These are the processes used to identify, evaluate, and execute on capital projects, and the investment evaluation process is used by Williams’ to identify, evaluate, and execute on acquisitions. Williams, Transco, and NWP may not always have sufficient and accurate information to identify and value potential opportunities and risks or the investment evaluation process may be incomplete or flawed. Growth may also be dependent upon the construction of new natural gas gathering, transportation, compression, processing, or treating pipelines and facilities, NGL transportation, or fractionation or storage facilities as well as the expansion of existing facilities. Additional risks associated with construction may include the inability to obtain rights-of-way, skilled labor, equipment, materials, permits, and other required inputs in a timely manner such that projects are completed, on time or at all, and the risk that construction cost overruns, including due to inflation or the imposition of tariffs on foreign-made materials and

goods (including steel and steel pipes) necessary to conduct business, could cause total project costs to exceed budgeted costs. Additional risks associated with growing the business include, among others, that:

•Changing circumstances and deviations in variables could negatively impact the investment analysis, including projections of revenues, earnings, and cash flow relating to potential investment targets, resulting in outcomes that are materially different than anticipated;

•Williams, Transco, or NWP could be required to contribute additional capital to support acquired businesses or assets, and Williams, Transco, or NWP may assume liabilities that were not disclosed, exceed estimates and for which contractual protections are either unavailable or prove inadequate;

•Acquisitions could disrupt ongoing business, distract management, divert financial and operational resources from existing operations, and make it difficult to maintain current business standards, controls, and procedures;

•Acquisitions and capital projects may require substantial new capital, including the issuance of debt or equity, and Williams, Transco, or NWP may not be able to access credit or capital markets or obtain acceptable terms.

If realized, any of these risks could have an adverse impact on Williams’, Transco’s, and NWP’s financial condition, results of operations, including the possible impairment of assets, or cash flows.

The energy industry is highly competitive, and increased competitive pressure could adversely affect Williams’, Transco’s, and NWP’s businesses and operating results.

Williams has numerous competitors in all aspects of its businesses, and additional competitors may enter its markets. Any current or future competitor that delivers natural gas, NGLs, or other commodities into the areas that Williams operates could offer transportation services that are more desirable to shippers than those Williams provides because of price, location, facilities, or other factors. In addition, current or potential competitors may make strategic acquisitions or have greater financial resources, which could affect Williams’ ability to make strategic investments or acquisitions. Competitors may be able to respond more quickly to new laws or regulations or emerging technologies or to devote greater resources to the construction, expansion, or refurbishment of their facilities. Further, natural gas also competes with other forms of energy available to customers, including electricity, coal, fuel oils, and other alternative energy sources. Failure to successfully compete against current and future competitors could have a material adverse effect on Williams’ business, results of operations, financial condition, and cash flows.

Similarly, Transco and NWP compete primarily with other interstate pipelines and storage facilities in the transportation and storage of natural gas. The principal elements of competition among interstate natural gas transportation and storage assets are rates, terms of service, access to natural gas supplies, flexibility, and reliability. Although most of Transco’s and NWP’s current capacity is fully contracted, the FERC has taken certain actions to strengthen market forces in the interstate natural gas pipeline industry that have led to increased competition throughout the industry. Similarly, a highly liquid competitive commodity market in natural gas, and increasingly competitive markets for natural gas services, including competitive secondary markets in pipeline capacity, have developed. As a result, pipeline capacity is being used more efficiently, and peaking and storage services are increasingly effective substitutes for annual pipeline capacity. As a result, Transco and NWP could experience some “turnback” of firm capacity as the primary terms of existing agreements expire. If Transco and NWP are unable to remarket this capacity or can remarket it only at substantially discounted rates compared to previous contracts, they or their remaining customers, may have to bear the costs associated with the turned back capacity. Moreover, Williams and its other affiliates may not be limited in their ability to compete with Transco and NWP.

Additionally, some of Transco’s and NWP’s competitors may have greater financial resources and access to greater supplies of natural gas than they do. Some of these competitors may expand or construct transportation and storage systems that would create additional competition for natural gas supplies or the services provided to customers. In a number of key markets, interstate pipelines are now facing competitive pressure from other major pipeline systems, enabling local distribution companies and end users to choose a transmission provider based on considerations other than location. Other entities could construct new pipelines or expand existing pipelines that could potentially serve the same markets as Transco’s and NWP’s pipeline systems. Any such new pipelines could

offer transportation services that are more desirable to shippers because of locations, facilities, or other factors. These new pipelines could charge rates or provide service to locations that would result in greater net profit for shippers and producers, and thereby force Transco and NWP to lower the rates charged for service on their pipelines to extend existing transportation service agreements or to attract new customers. Transco and NWP are aware of proposals by competitors to expand pipeline capacity in certain markets Transco and NWP also serve, which, if the proposed projects proceed, could increase the competitive pressure upon Transco and NWP. Transco and NWP may not be able to successfully compete against current and future competitors and any failure to do so could have a material adverse effect on Transco’s and NWP’s businesses, financial condition, results of operations, and cash flows.

Williams does not own 100 percent of the equity interests of certain subsidiaries, including the nonconsolidated entities, which may limit its ability to operate and control these subsidiaries. Certain operations, including the nonconsolidated entities, are conducted through arrangements that may limit Williams’ ability to operate and control these operations.

The operations of Williams’ current non-wholly owned subsidiaries are conducted in accordance with their organizational documents. Williams anticipates that it will enter into more such arrangements, including through new joint venture structures. Williams may have limited operational flexibility in such current and future arrangements and may not be able to control the timing or amount of cash distributions received. In certain cases:

•Williams cannot control the amount of cash reserves determined to be necessary to operate the business, which reduces cash available for distributions;

•Williams cannot control the amount of capital expenditures that it is required to fund, and Williams is dependent on third parties to fund their required share of capital expenditures;

•Williams may be subject to restrictions or limitations on its ability to sell or transfer its interests in the jointly owned assets;

•Williams may be forced to offer rights of participation to other joint venture participants in the area of mutual interest;

•Williams has limited ability to influence or control certain day to day activities affecting the operations; and

•Williams may have additional obligations, such as required capital contributions that are important to the success of the operations.

In addition, conflicts of interest may arise between Williams, on the one hand, and other interest owners, on the other hand. If such conflicts of interest arise, Williams may not have the ability to control the outcome with respect to the matter in question. Disputes between Williams and other interest owners may also result in delays, litigation, or operational impasses.

The risks described above or the failure to continue such arrangements could adversely affect Williams’ ability to conduct the operations that are the subject of such arrangements which could, in turn, negatively affect Williams’ business, growth strategy, financial condition, and results of operations.

Williams, Transco, and NWP may not be able to replace, extend, or add additional customer contracts or contracted volumes on favorable terms, or at all, as applicable, which could affect Williams’, Transco’s, and NWP’s financial condition and ability to grow, as well as the amount of cash available to Williams to pay dividends.

Williams, Transco, and NWP rely on a limited number of customers and producers for a significant portion of revenues and supply of natural gas and NGLs, as applicable. Although many of Williams’, Transco’s, and NWP’s customers and suppliers are subject to long-term contracts, if Williams, Transco, and NWP are unable to replace or extend such contracts, add additional customers, or otherwise increase the contracted volumes of natural gas provided to it by current producers, in each case on favorable terms, if at all, Williams’, Transco’s, and NWP’s businesses, financial condition, results of operations, and cash flows, as well as Williams’ growth plans and the amount of cash available to pay dividends could be materially adversely affected.

Williams’, Transco’s, and NWP’s ability to replace, extend, or add additional customer or supplier contracts, or increase contracted volumes of natural gas from current producers, on favorable terms, or at all, is subject to a number of factors, some of which are beyond their control, including:

•The level of existing and new competition in Williams’, Transco’s, and NWP’s businesses or from alternative sources, such as electricity, renewable resources, coal, fuel oils, or nuclear energy;

•General economic, financial markets, and industry conditions;

•The effects of regulation on Williams, Transco, and NWP, their customers, and their contracting practices;

•Williams’, Transco’s, and NWP’s ability to understand their customers’ expectations, efficiently and reliably deliver high quality services, and effectively manage customer relationships. The results of these efforts will impact Williams’, Transco’s, and NWP’s reputation and positioning in the market.

In addition, Williams’ markets are affected by natural gas and NGL prices, demand, availability, and margins. Higher prices for energy commodities related to Williams’ businesses could result in a decline in the demand for those commodities and, therefore, in customer contracts or throughput on the pipeline systems. Lower energy commodity prices could negatively impact the ability to maintain or achieve favorable contractual terms, including pricing, and could also result in a decline in the production of energy commodities resulting in reduced customer contracts, supply contracts, and throughput on the pipeline systems.

Certain of Williams’, Transco’s, and NWP’s natural gas pipeline services are subject to long-term, fixed-price contracts that are not subject to adjustment, even if the cost to perform such services exceeds the revenues received from such contracts.

Williams’, Transco’s, and NWP’s natural gas pipelines provide some services pursuant to long-term, fixed-price contracts. It is possible that costs to perform services under such contracts will exceed the revenues collected. Although other services are priced at cost-based rates that are subject to adjustment in rate cases, under FERC policy, a regulated service provider and a customer may mutually agree to sign a contract for service at a “negotiated rate” that may be above or below the FERC regulated cost-based rate for that service. These “negotiated rate” contracts are not generally subject to adjustment for increased costs that could be produced by inflation or other factors relating to the specific facilities being used to perform the services.

Further, the costs of testing, maintaining, or repairing regulated facilities for Williams, Transco, and NWP may exceed Williams’, Transco’s and NWP’s expectations, and the FERC may not allow, or competition in the markets may prevent, recovery of such costs in the rates charged for applicable services at Williams’, Transco’s, and NWP’s regulated pipelines and facilities. Williams, Transco and NWP have experienced and could experience in the future unexpected leaks or ruptures on their regulated natural gas pipeline systems or storage facilities. Either as a preventative measure or in response to a leak or another issue, Williams, Transco and NWP could be required by regulatory authorities to test or undertake modifications to their regulated systems. If the cost of testing, maintaining, or repairing regulated facilities exceeds expectations, and the FERC does not allow recovery, or competition in the markets prevents recovering such costs in the rates charged for Williams’, Transco’s and NWP’s regulated services, such costs could have a material adverse impact on Williams’, Transco’s and NWP’s businesses, financial condition, results of operation, and cash flows.

Some of Williams’, Transco’s, and NWP’s businesses are exposed to supplier concentration risks arising from dependence on a single or a limited number of suppliers.

Some of Williams’, Transco’s, and NWP’s businesses may be dependent on a small number of suppliers for the delivery of critical goods or services. If a supplier on which one of the businesses depends were to fail to timely supply required goods and services, such business may not be able to replace such goods and services in a timely manner or otherwise on favorable terms or at all. If Williams’, Transco’s, and NWP’s businesses are unable to adequately diversify or otherwise mitigate such supplier concentration risks, and such risks were realized, such businesses could be subject to reduced revenues and increased expenses, which could have a material adverse effect on Williams’, Transco’s, and NWP’s financial condition, results of operations, and cash flows.

Transco and NWP depend on certain key customers for a significant portion of their revenues. The loss of any of these key customers or the loss of any contracted volumes could result in a decline in Transco’s and NWP’s respective businesses.

Transco and NWP rely on a limited number of customers for a significant portion of their revenues. Although some of these customers are subject to long-term contracts, Transco and NWP may be unable to negotiate extensions or replacements of these contracts on favorable terms, or at all. For the year ended December 31, 2024, Transco’s largest customer was Dominion Energy, Inc., which accounted for approximately 7 percent of its operating revenue, and NWP’s largest customer was Puget Sound Energy, Inc., which accounted for approximately 31 percent of its operating revenue. The loss of all, or even a portion of, the revenues from contracted volumes supplied by Transco’s and NWP’s key customers, as a result of competition, creditworthiness, inability to negotiate extensions or replacements of contracts, or otherwise, could have a material adverse effect on their businesses, financial condition, results of operations, and cash flows. For more information regarding Transco’s and NWP’s customer revenues, please read Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk.

Failure of service providers or disruptions to outsourcing relationships might negatively impact Williams’, Transco’s, and NWP’s ability to conduct their businesses.

Transco and NWP rely on Williams and other third parties for certain services necessary for Transco and NWP to be able to conduct business. Certain of Williams’ accounting and information technology services, which are relied upon by Transco and NWP, are currently provided by third-party vendors, and sometimes from service centers outside of the United States. Services provided pursuant to these arrangements could be disrupted. Similarly, the expiration of agreements associated with such arrangements or the transition of services between providers could lead to loss of institutional knowledge or service disruptions. Williams’ reliance on others as service providers, and Transco’s and NWP’s reliance on Williams’ reliance on others as service providers, could have a material adverse effect on Williams’, Transco’s, and NWP’s businesses, financial condition, results of operations, and cash flows.

An impairment of Williams’ assets, including property, plant, and equipment, intangible assets, and/or equity-method investments, could reduce Williams’ earnings.

GAAP requires Williams to test certain assets for impairment on either an annual basis or when events or circumstances occur which indicate that the carrying value of such assets might be impaired. The outcome of such testing could result in impairments of Williams’ assets including property, plant, and equipment, intangible assets, and/ or equity-method investments. Additionally, any asset monetizations could result in impairments if any assets are sold or otherwise exchanged for amounts less than their carrying value. If Williams determines that an impairment has occurred, Williams would be required to take an immediate noncash charge to earnings.

Increasing scrutiny and changing expectations from stakeholders with respect to environmental, social and governance practices may impose additional costs or risks.

Companies across all industries are facing increasing scrutiny from stakeholders related to their environmental, social and governance (“ESG”) practices. Investor advocacy groups, institutional investors, investment funds and other influential investors are also increasingly focused on ESG practices and in recent years have placed increasing importance on the implications and social cost of their investments. Regardless of the industry, investors’ increased focus and activism related to ESG (as proponents or opponents) and similar matters may hinder access to capital, as investors may decide to reallocate capital or to not commit capital as a result of their assessment of a company’s ESG practices. Companies that do not adapt to or comply with investor or other stakeholder expectations and standards, which are evolving, or that are perceived to have not responded appropriately to the concern for ESG issues, regardless of whether there is a legal requirement to do so, may suffer from reputational damage, and the business, financial condition, and/or stock price of such a company could be materially and adversely affected.

Williams, Transco, and NWP face pressures from their stakeholders, who are increasingly focused on climate change, to prioritize sustainable energy practices, reduce carbon footprint, and promote sustainability. Williams’ stockholders may require Williams to implement ESG procedures or standards to continue engaging with Williams, to remain invested in Williams, or before they may make further investments in Williams. Additionally, Williams, Transco, and NWP may face reputational challenges in the event their ESG procedures or standards do not meet the standards set by certain constituencies. Williams, Transco, and NWP adopted certain practices as highlighted in Williams’ 2023 Sustainability Report, including with respect to air emissions, biodiversity and land use, climate

change, and environmental stewardship. It is possible, however, that Williams’, Transco’s, and NWP’s stakeholders might not be satisfied with these sustainability efforts or the speed of their adoption. If Williams, Transco and NWP do not meet stakeholders’ expectations, Williams’, Transco’s, and NWP’s businesses, ability to access capital, and/or Williams’ stock price could be harmed.

Additionally, adverse effects upon the oil and gas industry related to the worldwide social and political environments, including uncertainty or instability resulting from climate change, changes in political leadership and environmental policies, changes in geopolitical-social views toward fossil fuels and renewable energy, concern about the environmental impact of climate change, and investors’ expectations regarding ESG matters, may also adversely affect demand for Williams’, Transco’s, and NWP’s services. Any long-term material adverse effect on the oil and gas industry could have a significant financial and operational adverse impact on Williams’, Transco’s, and NWP’s businesses.

The occurrence of any of the foregoing could have a material adverse effect on the price of Williams’ stock and Williams’, Transco’s, and NWP’s businesses and financial condition.

Williams, Transco, and NWP may be subject to physical and financial risks associated with climate change.

The threat of global climate change may create physical and financial risks to Williams’, Transco’s, and NWP’s businesses. Energy needs vary with weather conditions. To the extent weather conditions may be affected by climate change, energy use could increase or decrease depending on the duration and magnitude of any changes. Increased energy use due to weather changes may require Williams, Transco, and NWP to invest in more pipelines and other infrastructure to serve increased demand. A decrease in energy use due to weather changes may affect Williams’, Transco’s, and NWP’s financial condition through decreased revenues. Extreme weather conditions in general require more system backup, adding to costs, and can contribute to increased system stresses, including service interruptions. Weather conditions outside of Williams’, Transco’s, and NWP’s operating territory could also have an impact on their revenues. To the extent the frequency of extreme weather events increases, this could increase the cost of providing service. Williams, Transco, and NWP may not be able to pass on the higher costs to customers or recover all costs related to mitigating these physical risks.

Additionally, many climate models indicate that global warming is likely to result in rising sea levels and increased frequency and severity of weather events, which may lead to higher insurance costs, or a decrease in available coverage, for Williams’, Transco’s, and NWP’s assets in areas subject to severe weather. These climate-related changes could damage physical assets, especially operations located in low-lying areas near coasts and river banks, and facilities situated in hurricane-prone and rain-susceptible regions.

To the extent financial markets view climate change and greenhouse gas (“GHG”) emissions as a financial risk, this could negatively impact Williams’, Transco’s, and NWP’s cost of and access to capital. Climate change and GHG regulation could also reduce demand for Williams’, Transco’s, and NWP’s services. The business could also be affected by the potential for lawsuits against GHG emitters, based on links drawn between GHG emissions and climate change.

Williams’, Transco’s, and NWP’s operations are subject to operational risks and hazards that might result in accidents and unforeseen interruptions.

There are operational risks and hazards associated with the gathering, transporting, storage, processing, and treating of natural gas, the fractionation, transportation, and storage of NGLs, and crude oil transportation and production handling, including:

•Aging infrastructure and mechanical problems;

•Damages to pipelines and pipeline blockages or other pipeline interruptions;

•Uncontrolled releases of natural gas (including sour gas), NGLs, crude oil, or other products;

•Collapse or failure of storage facilities or caverns, as applicable;

•Operator error;

•Damage caused by third-party activity, such as operation of construction equipment;

•Pollution and other environmental risks;

•Fires, explosions, craterings, and blowouts;

•Security risks, including cybersecurity;

•Operating in a marine environment, as applicable.

Any of these risks could result in loss of human life, personal injuries, significant damage to property, environmental pollution, impairment of operations, loss of services to customers, reputational damage, and substantial losses to Williams, Transco, and NWP. The location of certain segments of Williams’, Transco’s, and NWP’s facilities in or near populated areas, including residential areas, commercial business centers, and industrial sites, could increase the level of damage resulting from these risks. An event such as those described above could have a material adverse effect on Williams’, Transco’s, and NWP’s financial condition and results of operations, particularly if the event is not fully covered by insurance.

Williams’, Transco’s, and NWP’s assets and operations, as well as their customers’ assets and operations, can be adversely affected by weather and other natural phenomena.

Williams’, Transco’s, and NWP’s assets and operations, especially those located offshore, and their customers’ assets and operations can be adversely affected by hurricanes, floods, earthquakes, landslides, tornadoes, fires, and other natural phenomena and weather conditions, including extreme or unseasonable temperatures, making it more difficult for Williams, Transco, and NWP to realize the historic rates of return associated with their assets and operations. A significant disruption in Williams’, Transco’s, and NWP’s or their customers’ operations or the occurrence of a significant liability for which Williams, Transco, and NWP are not fully insured could have a material adverse effect on their businesses, financial condition, results of operations, and cash flows.

Williams’, Transco’s, and NWP’s businesses could be negatively impacted by acts of terrorism and related disruptions.

Given the volatile nature of the commodities Williams, Transco, and NWP transport, process, store, and sell, their assets and the assets of their customers and others in the industry may be targets of terrorist activities. Uncertainty surrounding the Russian invasion of Ukraine, conflicts in the Middle East, or other sustained military campaigns, may affect Williams’, Transco’s, and NWP’s operations in unpredictable ways, including the possibility that infrastructure facilities could be direct targets of, or indirect casualties of, an act of terrorism. A terrorist attack could create significant price volatility, disrupt business, limit access to capital markets, or cause significant harm to operations, such as full or partial disruption to Williams’, Transco’s, and NWP’s ability to produce, process, transport, or distribute natural gas, NGLs, or other commodities, as applicable. Acts of terrorism, as well as events occurring in response to or in connection with acts of terrorism, could cause environmental repercussions that could result in a significant decrease in revenues or significant reconstruction or remediation costs, which could have a material adverse effect on Williams’, Transco’s, and NWP’s businesses, financial condition, results of operations, and cash flows.

A breach of information technology infrastructure, including a breach caused by a cybersecurity attack on Williams, Transco, or NWP, or the third parties with whom they are interconnected, may interfere with the safe operation of assets, result in the disclosure of personal or proprietary information, and cause reputational harm.

Williams relies on its information technology infrastructure to process, transmit, and store electronic information, including information used to safely operate Williams’, Transco’s, and NWP’s assets. Transco and NWP rely on Williams for their information technology infrastructure. The Williams Board of Directors has oversight responsibility with regard to cybersecurity risks, and reviews management’s efforts to address and mitigate cybersecurity risks, including the establishment and implementation of policies to address cybersecurity threats. Williams has invested, and expects to continue to invest, significant time, manpower, and capital in its information technology infrastructure. However, the age, operating systems, or condition of the current information technology infrastructure and software assets and the ability to maintain and upgrade such assets could affect Williams’, and thus Transco’s and NWP’s, ability to resist cybersecurity threats. While Williams believes that it maintains appropriate information security policies, practices, and protocols, Williams regularly faces cybersecurity and other security threats to its information technology infrastructure, including risks that may be enhanced through the use of artificial intelligence, which could include threats to operational industrial control systems and safety systems that

operate its pipelines, plants, and assets. Williams faces unlawful attempts to gain access to its information technology infrastructure, including coordinated attacks from hackers, whether state-sponsored groups, “hacktivists”, or private individuals. Williams faces the threat of theft and misuse of sensitive data and information, including customer and employee information. Williams also faces attempts to gain access to information related to its assets through attempts to obtain unauthorized access by targeting acts of deception against individuals with legitimate access to physical locations or information. Williams is also subject to cybersecurity risks arising from the fact that Williams’, Transco’s, and NWP’s business operations are interconnected with third parties, including third-party pipelines, other facilities and contractors and vendors. In addition, the breach of certain business systems could affect Williams’ ability to correctly record, process, and report financial information. Breaches in Williams’, Transco’s, and NWP’s information technology infrastructure or physical facilities, or other disruptions including those arising from theft, vandalism, fraud, or unethical conduct, which may increase as a result of the Russian invasion of Ukraine or other geopolitical tensions and conflicts, could result in damage to or destruction of assets, unnecessary waste, safety incidents, damage to the environment, reputational damage, potential liability, the loss of contracts, the imposition of significant costs associated with remediation and litigation, heightened regulatory scrutiny, increased insurance costs, and have a material adverse effect on Williams’, Transco’s, and NWP’s operations, financial condition, results of operations, and cash flows.

If third-party pipelines and other facilities interconnected to Williams’, Transco’s, and NWP’s pipelines and facilities become unavailable to transport natural gas and NGLs or to treat natural gas, as applicable, Williams’, Transco’s, and NWP’s revenues could be adversely affected.

Williams, Transco, and NWP depend upon third-party pipelines and other facilities that provide delivery options to and from their pipelines and storage facilities for the benefit of their customers. Because Williams, Transco, and NWP do not own these third-party pipelines or other facilities, their continuing operation is not within Williams’, Transco’s or NWP’s control. If these pipelines or facilities were to become temporarily or permanently unavailable for any reason, or if throughput were reduced because of testing, line repair, damage to pipelines or facilities, reduced operating pressures, lack of capacity, increased credit requirements or rates charged by such pipelines or facilities or other causes, Williams, Transco, and NWP and their customers would have reduced capacity to transport, store, or deliver natural gas or NGL products to end use markets or to receive deliveries of mixed NGLs, as applicable, thereby reducing revenues. Any temporary or permanent interruption at any key pipeline interconnection or in operations on third-party pipelines or facilities that would cause a material reduction in volumes transported on Williams’, Transco’s, or NWP’s pipelines or gathering systems, as applicable, or processed, fractionated, treated, or stored at Williams’, Transco’s, or NWP’s facilities, as applicable, could have a material adverse effect on Williams’, Transco’s, and NWP’s businesses, financial condition, results of operations, and cash flows.

Williams’ operating results for certain components of its business might fluctuate on a seasonal basis.

Revenues from certain components of Williams’ business can have seasonal characteristics. In many parts of the country, demand for natural gas and other fuels peaks during the winter. As a result, Williams’ overall operating results in the future might fluctuate substantially on a seasonal basis. Demand for natural gas and other fuels could vary significantly from Williams’ expectations depending on the nature and location of its facilities and pipeline systems and the terms of the natural gas transportation arrangements relative to demand created by unusual weather patterns.

Williams, Transco, and NWP do not own all of the land on which their pipelines and facilities are located, which could disrupt operations.

Williams, Transco, and NWP do not own all of the land on which their pipelines and facilities have been constructed. As such, Williams, Transco, and NWP are subject to the possibility of increased costs to retain necessary land use. In those instances in which Williams, Transco and NWP do not own the land on which their facilities are located, Williams, Transco, and NWP obtain the rights to construct and operate their facilities and gathering systems on land owned by third parties and governmental agencies for a specific period of time. In addition, some of Williams’ and NWP’s facilities cross Native American lands pursuant to rights-of-way of limited terms. Williams and NWP may not have the right of eminent domain over land owned by Native American tribes. Williams’, Transco’s, and NWP’s loss of any of these rights, through their inability to renew right-of-way contracts

or otherwise, could have a material adverse effect on their businesses, financial condition, results of operations, and cash flows.

Williams’ business could be negatively impacted as a result of stockholder activism.

In recent years, stockholder activism, including threatened or actual proxy contests, has been directed against numerous public companies, including Williams. Williams was the target of a proxy contest from a stockholder activist, which resulted in Williams incurring significant costs. If stockholder activists were to again take or threaten to take actions against Williams or seek to involve themselves in the governance, strategic direction, or operations of Williams, Williams could incur significant costs as well as the distraction of management, which could have an adverse effect on Williams’ business or financial results. In addition, actions of activist stockholders may cause significant fluctuations in Williams’ stock price based on temporary or speculative market perceptions or other factors that do not necessarily reflect the underlying fundamentals and prospects of Williams’ business.

Williams’ costs and funding obligations for defined benefit pension plans and other postretirement benefit plans, and Transco’s and NWP’s allocations regarding the same, are affected by factors beyond Williams’ control.

Williams has defined benefit pension plans and other postretirement benefit plans. The timing and amount of the funding requirements under the defined benefit pension plans depend upon a number of factors that Williams’ controls, including changes to pension plan benefits, as well as factors outside of Williams’ control, such as asset returns, interest rates, and changes in pension laws. Changes to these and other factors can significantly increase Williams’ funding requirements and could have a significant adverse effect on Williams’ financial condition and results of operations.

Transco and NWP have no employees; employees of Williams and its affiliates provide services to Transco and NWP. As a result, Transco and NWP are allocated a portion of Williams’ cost for defined benefit pension plans and other postretirement benefit plans. The timing and amount of these allocations depends on factors that Williams controls, and any changes can significantly increase the allocations, which could have a significant adverse effect on Transco’s and NWP’s financial condition and results of operations.

Risks Related to Financing

A downgrade of Williams’, Transco’s, and NWP’s credit ratings, which are determined outside of their control by independent third parties, could impact their liquidity, access to capital, and costs of doing business, and the ability of Transco and NWP to obtain credit in the future could be affected by Williams’ credit ratings.

Downgrades of Williams’, Transco’s, and NWP’s credit ratings increase cost of borrowing and could require Williams, Transco, and NWP to provide collateral to their counterparties, negatively impacting available liquidity. In addition, Williams’, Transco’s, and NWP’s ability to access capital markets could be limited by the downgrading of their credit ratings.

Credit rating agencies perform independent analysis when assigning credit ratings. The analysis includes a number of criteria such as business composition, market and operational risks, as well as various financial tests.

Credit rating agencies continue to review the criteria for industry sectors and various debt ratings and may make changes to those criteria from time to time. Credit ratings are subject to revision or withdrawal at any time by the ratings agencies. As of the date of the filing of this report, Williams, Transco, and NWP have been assigned an investment-grade credit rating by the credit ratings agencies.

In addition, substantially all of Williams’ operations are conducted through its subsidiaries. Williams’ cash flows are substantially derived from loans, dividends, and distributions paid to it by its subsidiaries. Due to the relationship of Transco and NWP as subsidiaries of Williams, Transco’s and NWP’s ability to obtain credit will be affected by Williams’ credit ratings. Any downgrading of a Williams credit rating could result in a downgrading of a Transco and NWP credit rating, which could adversely affect Transco’s and NWP’s access to capital and limit their ability to obtain financing in the future upon favorable terms, if at all.

Difficult conditions in the global financial markets and the economy in general could negatively affect Williams’, Transco’s, and NWP’s businesses and results of operations.

Williams’, Transco’s, and NWP’s businesses may be negatively impacted by adverse economic conditions or future disruptions in the global financial markets. Included among these potential negative impacts are industrial or economic contraction leading to reduced energy demand and lower prices for Williams’, Transco’s, and NWP’s products and services and increased difficulty in collecting amounts owed to them by customers. Geopolitical tensions and conflicts, including those in the Middle East, as well as the ongoing Russian invasion of Ukraine and the actions undertaken by western nations in response to these conflicts, have had, and may continue to have, adverse impacts on global financial markets. If financing is not available when needed, or is available only on unfavorable terms, Williams, Transco, and NWP may be unable to implement their business plans or otherwise take advantage of business opportunities or respond to competitive pressures. In addition, financial markets have periodically been affected by concerns over U.S. fiscal and monetary policies. These concerns, as well as actions taken by the U.S. federal government in response to these concerns, could significantly and adversely impact the global and U.S. economies and financial markets, which could negatively impact Williams, Transco, and NWP in the manner described above.

Williams, Transco and NWP are party to a credit agreement with aggregate commitments available of $3.75 billion, with up to an additional $500 million increase in aggregate commitments available under certain circumstances. Transco and NWP are each subject to a $500 million borrowing sublimit. The ability of Williams, Transco, and NWP to borrow under that facility could be impaired if one or more of the lenders fails to honor its contractual obligation to lend. For more information regarding financing, please read Note 13 – Debt and Banking Arrangements.

Restrictions in Williams’, Transco’s, and NWP’s debt agreements and the amount of their indebtedness may affect their future financial and operating flexibility.

Williams’ total outstanding long-term debt (including current portion and commercial paper) as of December 31, 2024, was $26.9 billion, including the long-term debt of Transco and NWP. The total outstanding long-term debt (including current portion) as of December 31, 2024, for Transco and NWP was $5.2 billion and $582 million, respectively.

The agreements governing Williams’, Transco’s, and NWP’s indebtedness contain covenants that restrict Williams’, Transco’s, and NWP’s, as applicable, and their respective subsidiaries’, ability to incur certain liens to support indebtedness, and ability to merge or consolidate or sell all or substantially all of its respective assets in certain circumstances. In addition, certain of Williams’, Transco’s, and NWP’s debt agreements contain various covenants that restrict or limit, among other things, the ability to make certain distributions during the continuation of an event of default, and to enter into certain affiliate transactions and certain restrictive agreements. Additionally, Transco has a debt covenant in one series of its notes restricting its ability and that of its subsidiaries to guarantee certain indebtedness. Certain of Williams’, Transco’s, and NWP’s debt agreements also contain, and those Williams, Transco, and NWP enter into in the future may contain, financial covenants, and other limitations with which they will need to comply.

Williams’, Transco’s, and NWP’s debt service obligations and the covenants described above could have important consequences. For example, they could:

•Make it more difficult for Williams, Transco, and NWP to satisfy their obligations with respect to their indebtedness, which could in turn result in an event of default on such indebtedness;

•Impair Williams’, Transco’s, and NWP’s ability to obtain additional financing in the future for working capital, capital expenditures, acquisitions, general corporate purposes or limited liability company purposes, as applicable, or other purposes;

•Diminish Williams’, Transco’s, and NWP’s ability to withstand a continued or future downturn in their business or the economy generally;

•Require Williams, Transco, and NWP to dedicate a substantial portion of their cash flow from operations to debt service payments, thereby reducing the availability of cash for working capital, capital expenditures,

acquisitions, the payments of dividends, general corporate purposes or limited liability company purposes, as applicable, or other purposes;

•Limit Williams’, Transco’s, and NWP’s flexibility in planning for, or reacting to, changes in their business and the industry in which they operate, including limiting their ability to expand or pursue business activities and preventing Williams, Transco, and NWP from engaging in certain transactions that might otherwise be considered beneficial to Williams, Transco, and NWP.

Williams’, Transco’s, and NWP’s ability to comply with their debt covenants, to repay, extend, or refinance their existing debt obligations and to obtain future credit will depend primarily on their operating performance. Williams’, Transco’s, and NWP’s ability to refinance existing debt obligations or obtain future credit will also depend upon the current conditions in the credit markets and the availability of credit generally. If Williams, Transco, and NWP are unable to comply with these covenants, meet their debt service obligations, or obtain future credit on favorable terms, or at all, Williams, Transco, and NWP could be forced to restructure or refinance their indebtedness, seek additional equity capital or sell assets. Williams, Transco, and NWP may be unable to obtain financing or sell assets on satisfactory terms, or at all.

Williams’, Transco’s, and NWP’s failure to comply with the covenants in the documents governing their indebtedness could result in events of default, which could render such indebtedness due and payable. Williams, Transco, and NWP may not have sufficient liquidity to repay their indebtedness in such circumstances. In addition, cross-default or cross-acceleration provisions in each of Williams’, Transco’s, and NWP’s debt agreements could cause a default or acceleration to have a wider impact on their liquidity than might otherwise arise from a default or acceleration of a single debt instrument. For more information regarding debt agreements, please read Note 13 – Debt and Banking Arrangements.

Changes to interest rates or increases in interest rates could adversely impact Williams’, Transco’s, and NWP’s access to credit, share price, and ability to issue securities or incur debt for acquisitions or other purposes, as applicable, and Williams’ ability to make cash dividends at intended levels.

Interest rates have fluctuated in recent years but could increase in the future. As a result, interest rates on future credit facilities and debt offerings could be higher than current levels, causing Williams’, Transco’s, and NWP’s financing costs to increase accordingly. As with other yield-oriented securities, Williams’ share price will be impacted by the level of Williams’ dividends and implied dividend yield. The dividend yield is often used by investors to compare and rank yield-oriented securities for investment decision-making purposes. Therefore, changes in interest rates, either positive or negative, may affect the yield requirements of investors who invest in Williams’ shares, and a rising interest rate environment could have an adverse impact on Williams’ share price and Williams’ ability to issue equity or pay cash dividends at intended levels or Williams’, Transco’s, and NWP’s ability to incur debt.

Williams’ hedging activities might not be effective and could increase the volatility of Williams’ results.

In an effort to manage Williams’ financial exposure related to commodity price and market fluctuations, Williams has entered, and may in the future enter into contracts to hedge certain risks associated with its assets and operations. In these hedging activities, Williams has used, and may in the future use, fixed-price, forward, physical purchase, and sales contracts, futures, financial swaps, and option contracts traded in the over-the-counter markets or on exchanges. Nevertheless, no single hedging arrangement can adequately address all risks present in a given contract. For example, a forward contract that would be effective in hedging commodity price volatility risks would not hedge the contract’s counterparty credit or performance risk. Therefore, unhedged risks will always continue to exist. While Williams attempts to manage counterparty credit risk within guidelines established by its credit policy, Williams may not be able to successfully manage all credit risk and as such, future cash flows and results of operations could be impacted by counterparty default. The difference in accounting treatment for the underlying position and the financial instrument used to hedge the value of the contract can cause volatility in Williams’ reported net income while the positions are open due to mark-to-market accounting.

Access to capital could be affected by financial institutions’ policies concerning fossil fuel related businesses.

Public concern regarding the potential effects of climate change has directed increased attention towards the funding sources of fossil-fuel energy companies. As a result, certain financial institutions, funds, and other sources

of capital have restricted or eliminated their investment in certain market segments of fossil-fuel related energy. Ultimately, limiting fossil-fuel related companies’ access to capital could make it more difficult for Williams’, Transco’s, and NWP’s customers to secure funding for exploration and production activities or for Williams, Transco, and NWP to secure funding for growth projects. Such a lack of capital could also both indirectly affect demand for Williams’, Transco’s, and NWP’s services and directly affect their ability to fund construction or other capital projects.

Williams can exercise substantial control over Transco’s and NWP’s distribution policies, businesses, and operations and may do so in a manner that is adverse to Transco’s and NWP’s interests.

Because Transco and NWP are indirect wholly owned subsidiaries of Williams, Williams exercises substantial control over their businesses and operations and makes determinations with respect to, among other things, the following:

•Payment of distributions and repayment of advances;

•Decisions on financings and capital raising activities;

•Mergers or other business combinations;

•Acquisition or disposition of assets.

Williams could decide to increase distributions or advances to Transco’s and NWP’s member consistent with existing debt covenants. This could adversely affect Transco’s or NWP’s liquidity.

Risks Related to Regulations

The operation of Williams’, Transco’s, and NWP’s businesses might be adversely affected by regulatory proceedings, changes in government regulations or in their interpretation or implementation, or the introduction of new laws or regulations applicable to Williams’, Transco’s, and NWP’s businesses or customers.

Public and regulatory scrutiny of the energy industry has resulted in the proposal and/or implementation of increased regulations. Such scrutiny has also resulted in various inquiries, investigations, and court proceedings, including litigation of energy industry matters. Both the shippers on Williams’, Transco’s, and NWP’s pipelines and regulators have rights to challenge the rates charged under certain circumstances. Any successful challenge could materially affect Williams’, Transco’s, and NWP’s results of operations.

Certain inquiries, investigations, and court proceedings are ongoing. Adverse effects may continue as a result of the uncertainty of ongoing inquiries, investigations, and court proceedings, or additional inquiries and proceedings by federal or state regulatory agencies or private plaintiffs. In addition, Williams, Transco, and NWP cannot predict the outcome of any of these inquiries or whether these inquiries will lead to additional legal proceedings against them, civil or criminal fines and/or penalties, or other regulatory action, including legislation, which might be materially adverse to the operation of Williams’, Transco’s, and NWP’s businesses and results of operations or increase their operating costs in other ways. Current legal proceedings or other matters, including environmental matters, suits, regulatory appeals, and similar matters might result in adverse decisions against Williams, Transco, and NWP which, among other outcomes, could result in the imposition of substantial penalties and fines and could damage their reputation. The result of such adverse decisions, either individually or in the aggregate, could be material and may not be covered fully or at all by insurance.

In addition, existing regulations, including those pertaining to financial assurances to be provided by Williams’, Transco’s, and NWP’s businesses in respect of potential asset decommissioning and abandonment activities, might be revised, reinterpreted, or otherwise enforced in a manner that differs from prior regulatory action. New laws and regulations, including those pertaining to oil and gas hedging and cash collateral requirements, might also be adopted or become applicable to Williams, Transco, and NWP, their customers, or their business activities. If new laws or regulations are imposed relating to oil and gas extraction, or if additional or revised levels of reporting, regulation, or permitting moratoria are required or imposed, including those related to hydraulic fracturing, the volumes of natural gas and other products that Williams, Transco, and NWP transport, gather, process, and treat could decline, compliance costs could increase, and results of operations could be adversely affected.

The natural gas sales, transportation, and storage operations of Williams’, Transco’s, and NWP’s natural gas pipelines are subject to regulation by the FERC, which could have an adverse impact on their ability to establish transportation and storage rates that would allow them to recover the full cost of operating their respective pipelines and storage assets, including a reasonable rate of return.

In addition to regulation by other federal, state, and local regulatory authorities, interstate pipeline transportation and storage services and related assets are subject to regulation by the FERC. Federal regulation extends to such matters as:

•Transportation and sale for resale of natural gas in interstate commerce;

•Rates, operating terms, types of services, and conditions of service;

•Certification and construction of new interstate pipelines and storage facilities;

•Acquisition, extension, disposition, or abandonment of existing interstate pipelines and storage facilities;

•Accounts and records;

•Depreciation and amortization policies;

•Relationships with affiliated companies that are involved in marketing functions of the natural gas business;

•Market manipulation in connection with interstate sales, purchases, or transportation of natural gas.

Regulatory or administrative actions in these areas, including successful complaints or protests against the rates of the gas pipelines, can affect Williams’, Transco’s, and NWP’s businesses in many ways, including decreasing tariff rates and revenues or setting future tariff rates to levels such that revenues are inadequate to recover increases in operating costs or to sustain an adequate return on capital investments, decreasing volumes in the pipelines, increasing costs, and otherwise altering the profitability of the pipeline business.

Furthermore, Transco charges its transportation customers a separate fee to access its offshore facilities in the Gulf of America, unlike other interstate pipelines that own facilities offshore. The separate charge is referred to as an “IT feeder” charge. The “IT feeder” rate is charged only when gas is actually transported on the applicable facilities and typically it is paid by producers or marketers. Because the “IT feeder” rate is typically paid by producers and marketers, it generally results in netback prices to producers that are slightly lower than the netbacks realized by producers transporting on other interstate pipelines. This rate design disparity can result in producers bypassing Transco’s offshore facilities in favor of alternative transportation facilities.

Williams’, Transco’s, and NWP’s operations are subject to environmental laws and regulations, including laws and regulations relating to climate change and greenhouse gas emissions, which may expose them to significant costs, liabilities, and expenditures that could exceed expectations.

Williams’, Transco’s, and NWP’s operations are subject to extensive federal, state, tribal, and local laws and regulations governing environmental protection, endangered and threatened species, the discharge of materials into the environment, and the security of chemical and industrial facilities. Substantial costs, liabilities, delays, and other significant issues related to environmental laws and regulations are inherent in the gathering, transportation, storage, processing, and treating of natural gas, fractionation, transportation, and storage of NGLs, and crude oil transportation and production handling as well as waste disposal practices and construction activities, as applicable. New or amended environmental laws and regulations can also result in significant increases in capital costs incurred to comply with such laws and regulations. Failure to comply with these laws, regulations, and permits may result in the assessment of administrative, civil and/or criminal penalties, the imposition of remedial obligations, the imposition of stricter conditions on or revocation of permits, the issuance of injunctions limiting or preventing some or all operations, and delays or denials in granting permits.

Joint and several strict liability may be incurred without regard to fault under certain environmental laws and regulations, for the remediation of contaminated areas and in connection with spills or releases of materials associated with natural gas, oil, and wastes on, under, or from Williams’, Transco’s, and NWP’s properties and facilities. Private parties, including the owners of properties through which Williams’, Transco’s, and NWP’s pipeline and gathering systems pass and facilities where their wastes are taken for reclamation or disposal, may have the right to pursue legal actions to enforce compliance as well as to seek damages for noncompliance with

environmental laws and regulations or for personal injury or property damage arising from their operations. Some sites at which Williams, Transco, and NWP operate are located near current or former third-party hydrocarbon storage and processing or oil and natural gas operations or facilities, and there is a risk that contamination has migrated from those sites.

Williams, Transco, and NWP are generally responsible for all liabilities associated with the environmental condition of their facilities and assets, whether acquired or developed, regardless of when the liabilities arose and whether they are known or unknown. In connection with certain acquisitions and divestitures, Williams, Transco, and NWP could acquire, or be required to provide indemnification against, environmental liabilities that could expose them to material losses, which may not be covered by insurance. In addition, the steps Williams, Transco and NWP could be required to take to bring certain facilities into compliance could be prohibitively expensive, and Williams, Transco, and NWP might be required to shut down, divest, or alter the operation of those facilities, which might cause them to incur losses.

In addition, climate change regulations and the costs that may be associated with such regulations and with the regulation of emissions of GHGs have the potential to affect the businesses of Williams, Transco, and NWP. Regulatory actions by the Environmental Protection Agency or the passage of new climate change laws or regulations could result in increased costs to operate and maintain facilities, install new emission controls on facilities, or administer and manage any GHG emissions program. Williams, Transco, and NWP believe it is possible that future governmental legislation and/or regulation may require them either to limit GHG emissions associated with operations or to purchase allowances for such emissions. Williams, Transco, and NWP could also be subjected to a carbon tax assessed on the basis of carbon dioxide emissions or otherwise. However, Williams, Transco, and NWP cannot predict precisely what form these future regulations might take, the stringency of any such regulations or when they might become effective. Several legislative bills have been introduced in the United States Congress that would require carbon dioxide emission reductions. Previously considered proposals have included, among other things, limitations on the amount of GHGs that can be emitted (so called “caps”) together with systems of permitted emissions allowances. These proposals could require Williams, Transco, and NWP to reduce emissions or to purchase allowances for such emissions.

In addition to activities on the federal level, state and regional initiatives could also lead to the regulation of GHG emissions sooner than and/or independent of federal regulation. These regulations could be more stringent than any federal legislation that may be adopted. Future legislation and/or regulation designed to reduce GHG emissions could make some of Williams’, Transco’s, and NWP’s activities uneconomic to maintain or operate. Williams, Transco, and NWP continue to monitor legislative and regulatory developments in this area and otherwise take efforts to limit and reduce GHG emissions from their facilities. Although the regulation of GHG emissions may have a material impact on Williams’, Transco’s, and NWP’s operations and rates, Williams, Transco, and NWP believe it is premature to attempt to quantify the potential costs of the impacts.

If Williams, Transco, and NWP are unable to recover or pass through a significant level of costs related to complying with climate change regulatory requirements, it could have a material adverse effect on Williams’, Transco’s, and NWP’s results of operations and financial condition.

General Risk Factors

Williams, Transco, and NWP do not insure against all potential risks and losses and could be seriously harmed by unexpected liabilities or by the inability of their insurers to satisfy their claims.

In accordance with customary industry practice, Williams, Transco, and NWP maintain insurance against some, but not all, risks and losses, and only at levels they believe to be appropriate. The occurrence of any risks not fully covered by Williams’, Transco’s, and NWP’s insurance could have a material adverse effect on their businesses, financial condition, results of operations, and cash flows and their ability to repay debt.

Failure to attract and retain an appropriately qualified workforce could negatively impact Williams’, Transco’s, and NWP’s results of operations.

Events such as an aging workforce without appropriate replacements, mismatch of skill sets to future needs, the challenges of attracting new, qualified workers to the midstream energy industry, or unavailability of contract labor may lead to operating challenges such as lack of resources, loss of knowledge, and a lengthy time period associated

with skill development, including with the workforce needs associated with projects and ongoing operations. Transco and NWP have no employees; employees of Williams and its affiliates provide services. Williams’ failure to hire and adequately obtain replacement employees, including the ability to transfer significant internal historical knowledge and expertise to the new employees, or the future availability and cost of contract labor may adversely affect Williams’, Transco’s, and NWP’s ability to manage and operate the businesses. If Williams is unable to successfully attract and retain an appropriately qualified workforce, including members of senior management, results of operations could be negatively impacted.

Holders of Williams’ common stock may not receive dividends in the amount expected or any dividends.

Williams may not have sufficient cash each quarter to pay dividends or maintain current or expected levels of dividends. The actual amount of cash Williams pays as a dividend may fluctuate from quarter to quarter and will depend on various factors, some of which are beyond Williams’ control, including:

•The amount of cash that Williams’ subsidiaries distribute to it;

•The amount of cash Williams generates from its operations, Williams’ working capital needs, Williams’ level of capital expenditures, and Williams’ ability to borrow;

•The restrictions contained in Williams’ indentures and credit facility and Williams’ debt service requirements;

•The cost of acquisitions, if any.

A failure either to pay dividends or to pay dividends at expected levels could result in a loss of investor confidence, reputational damage, and a decrease in the value of Williams’ stock price.

Item 1B. Unresolved Staff Comments

Not applicable.

Item 1C. Cybersecurity

Management for Williams, Transco, and NWP recognizes the increasing volume and sophistication of cyber threats and takes its responsibility to protect the information and systems under its purview seriously. Management’s cybersecurity processes aim to provide a comprehensive approach to assess, identify, and manage material risks arising from these cybersecurity threats.

Comprehensive Cybersecurity Program: Management has implemented a comprehensive cybersecurity risk management program (Cybersecurity Program) that is aligned with the National Institute for Standards and Technology Cybersecurity Framework. The Cybersecurity Program provides a risk-based approach to cybersecurity, and security controls are tailored so that cost-effective controls can be applied commensurate with the risk and sensitivity of specific information systems, control systems, and enterprise data. The Cybersecurity Program incorporates best practices and industry standards from multiple sources and is designed to comply with applicable regulations. The Cybersecurity Program includes, but is not limited to, the following elements: risk assessment, policies and procedures, contract management, training and awareness, auditing, compliance monitoring and testing, table-top exercises, and incident response.

Integration with Overall Risk Management: Management’s cybersecurity processes have been integrated into overall risk management system and processes. Management considers cybersecurity threat risks alongside other Company risks as part of its overall risk assessment process. Cybersecurity risk professionals collaborate with subject matter specialists, as necessary, to gather insights for identifying and assessing material cybersecurity threat risks, their severity, and potential mitigations.

Engagement of Third Parties: Management often engages with specialized third-party assessors, consultants, auditors, and other experts to review, validate, and enhance its cybersecurity practices. Third-party independent assessments provide an external perspective on management’s cybersecurity posture, allowing it to leverage best practices from the industry and ensure its defenses remain robust. All third parties engaged for such processes are subjected to rigorous scrutiny to ensure the third parties meet management’s security standards.

Oversight of Third-party Service Providers: Management acknowledges the potential risks associated with the use of third-party service providers. Therefore, management has established processes to oversee and identify material cybersecurity risks that may be associated with third-party service providers with whom it engages. This includes conducting thorough, risk-based due diligence before onboarding, performing security assessments, and confirming adherence to management’s cybersecurity requirements. Management also maintains active communication channels with these providers to stay informed about any potential security incidents or concerns.

Disclosure of Risks: Management describes how risks from cybersecurity threats could materially affect its business strategy, results of operations, or financial condition, as part of its risk factor disclosures at Part I, Item 1A of this Annual Report on Form 10-K.

Management is committed to continually enhancing its cybersecurity processes and practices to address the dynamic nature of the threats it faces and to ensure the security and integrity of its systems and data.

Cybersecurity Governance

Cybersecurity is an important part of the risk management processes and an area of focus for the Board of Directors and management. Each member of Williams’ organization, which includes Transco and NWP, from facility operators to board members, has a responsibility to safeguard the organization’s cybersecurity. The Chief Information Security Officer (CISO) is responsible for the cybersecurity strategy and execution, while the Board and the Audit Committee are responsible for oversight of cybersecurity risk.

The Cybersecurity Governance Committee is led by the CISO and includes cybersecurity managers and other subject matter experts as standing members. The Cybersecurity Governance Committee is tasked with developing, implementing, and maintaining the Cybersecurity Program. The Cybersecurity Executive Advisory Board (Executive Advisory Board) is led by the CISO, with the Chief Information Officer (CIO), Chief Financial Officer, Chief Human Resources Officer, the General Counsel, and the Chief Operations Officer as standing members. The Executive Advisory Board’s purpose is to ensure enterprise alignment with the Cybersecurity Program and provide executive oversight of the Cybersecurity Program.

The Board of Directors oversees cybersecurity-related policy and strategy. As part of this oversight, the CISO provides a cybersecurity dashboard that is reviewed by the Board at every regularly scheduled Board meeting, which includes key performance indicators for cybersecurity process maturity, operational performance, and enterprise performance toward Transportation Security Administration (TSA) compliance. Additionally, the CIO and/or CISO presents to the Board bi-annually regarding the cybersecurity risks and strategies, including as part of the Board’s annual long-term strategy session. The Audit Committee, comprised of independent directors, reviews the implementation and effectiveness of cybersecurity risk management protocols and reviews the effectiveness of cybersecurity as part of the Company’s accounting and internal control policies. As part of this oversight, the CIO presents to the Audit Committee bi-annually, as well as periodically in conjunction with any internal audits related to cybersecurity. Additionally, management has protocols by which cybersecurity incidents that meet established reporting thresholds are escalated internally and, where appropriate, are reported to the Board, as well as ongoing updates regarding any such incident until it has been addressed.

Williams’ new CIO joined the company in February 2025, and will succeed the company’s retiring CIO, who is retiring in March 2025. The new CIO brings over 20 years of experience in information technology and leadership within the energy industry and has extensive expertise in digital transformation, cloud strategies, enterprise AI initiatives, and cybersecurity, as well as managing large-scale system implementations and integrations. He holds an Executive MBA from the University of Texas at San Antonio, a Master of Computer Science and Engineering from the University of Texas at Arlington, and a Bachelor of Information Science and Engineering from Bangalore University.

The retiring CIO had been in his role at Williams for over 10 years and had over 30 years of combined information technology experience with a broad scope of responsibility. He provided senior leadership support of the cybersecurity and risk management programs since 2013. He holds a bachelor’s degree in management information systems (MIS) from the University of Oklahoma and a Master of Business Administration in MIS from the University of Dallas.

The CISO has been at Williams for over 25 years. During that time, he has held a variety of information technology positions at multiple levels in the organization ranging from network engineering to application development and project management, as well as several IT Manager and Director roles. He has had oversight of the cybersecurity and risk management programs since 2017. Active in government and private sector partnerships, he is currently serving as the Chair of Emergency Response Working Group under the Oil & Natural Gas Subsector Coordinating Council and recently acted as the Chair of the Interstate Natural Gas Association of America security committee. He holds degrees in Business Administration and MIS from the University of Oklahoma and is certified in Leadership from Harvard Business School’s executive education. In 2018, he obtained his Chief Information Security Officer certification from Carnegie Mellon University.

Item 2. Properties

Please read “Business” for a description of the location and general character of Williams’ principal physical properties. We generally own our facilities in fee simple, although a substantial portion of our pipeline and gathering facilities is constructed and maintained pursuant to rights-of-way, easements, permits, licenses, or consents on and across properties owned by others.

Transco

Transco’s gas pipeline facilities are generally owned in fee simple. However, a substantial portion of such facilities is constructed and maintained pursuant to rights-of-way, easements, permits, licenses or consents on and across properties owned by others. Compressor stations, with appurtenant facilities, are located in whole or in part either on lands owned or on sites held under leases or permits issued or approved by public authorities. Transco’s storage facilities are either owned or contracted for under long-term leases or easements. Transco leases their company offices in Houston, Texas.

NWP

NWP’s gas pipeline facilities are generally owned in fee simple. However, a substantial portion of such facilities are constructed and maintained on and across properties owned by others pursuant to rights-of-way, easements, permits, licenses or consents. NWP’s compressor stations, with associated facilities, are located in whole or in part upon lands owned by them and upon sites held under leases or permits issued or approved by public authorities. Land owned by others, but used by NWP under rights-of-way, easements, permits, leases, licenses, or consents, includes land owned by private parties, federal, state, and local governments, quasi-governmental agencies, or Native American tribes. The Plymouth LNG facility is located on lands owned in fee simple by NWP. Various credit arrangements restrict the sale or disposal of a major portion of our pipeline system. NWP leases its company offices in Salt Lake City, Utah.

Item 3. Legal Proceedings

Environmental

Certain reportable legal proceedings involving governmental authorities under federal, state, and local laws regulating the discharge of materials into the environment are described below. While it is not possible for Williams to predict the final outcome of the proceedings that are still pending, it does not anticipate a material effect on its consolidated financial position if it received an unfavorable outcome in any one or more of such proceedings. Williams’ threshold for disclosing material environmental legal proceedings involving a governmental authority where potential monetary sanctions are involved is $1 million.

Other environmental matters called for by this Item are described under the caption “Environmental Matters” in Note 18 – Contingencies and Commitments included under Part II, Item 8 Financial Statements of this report, which information is incorporated by reference into this Item.

Other Litigation

The additional information called for by this Item is provided in Note 18 – Contingencies and Commitments included under Part II, Item 8 Financial Statements of this report, which information is incorporated by reference into this Item.

Item 4. Mine Safety Disclosures

Not applicable.

Information About Williams’ Executive Officers

The name, title, age, period of service, and recent business experience of each of Williams’ executive officers as of February 25, 2025, are listed below.

Name and Position

Age

Business Experience in Past Five Years (or Relevant Business Experience)

Alan S. Armstrong

2011 to present

Director, Chief Executive Officer, and President, The Williams Companies, Inc.

Director, Chief Executive Officer, and President

2015 to 2018

Chairman of the Board, Williams Partners L.P.

2014 to 2018

Chief Executive Officer, Williams Partners L.P.

2012 to 2018

Director of the general partner, Williams Partners L.P.

Micheal G. Dunn

2017 to present

Executive Vice President and Chief Operating Officer, The Williams Companies, Inc.

Executive Vice President and Chief Operating Officer

2017 to 2018

Director of the general partner, Williams Partners L.P.

Mary A. Hausman

2022 to present

Vice President, Chief Accounting Officer and Controller, The Williams Companies, Inc.

Vice President, Chief Accounting Officer and Controller

2019 to 2022

Staff Vice President of Internal Audit, The Williams Companies, Inc.

2019

Director Special Projects, The Williams Companies, Inc.

2013 to 2019

Vice President and Chief Accounting Officer, NV Energy (a Berkshire Hathaway Energy Company)

Larry C. Larsen

2022 to present

Senior Vice President Gathering & Processing, The Williams Companies, Inc.

Senior Vice President Gathering & Processing

2020 to 2022

Vice President Strategic Development, The Williams Companies, Inc.

2019 to 2020

Vice President Rocky Mountain Midstream, The Williams Companies, Inc.

2018 to 2019

Vice President GM Rocky Mountain Midstream, The Williams Companies, Inc.

2017 to 2018

Vice President Central Services, The Williams Companies, Inc.

Eric J. Ormond

2023 to present

Senior Vice President Project Execution, The Williams Companies, Inc.

Senior Vice President Project Execution

2023

Senior Vice President Commercial Operations, Engineering & Project Management, Crestwood Midstream Partners LP

2020 to 2023

Senior Vice President Engineering & Project Management, Crestwood Midstream Partners LP

2017 to 2020

Vice President Strategic Development & New Ventures, Crestwood Midstream Partners LP

Debbie L. (Cowan) Pickle

2018 to present

Senior Vice President and Chief Human Resources Officer, The Williams Companies, Inc.

Senior Vice President and Chief Human Resources Officer

2013 to 2018

Global Vice President of Human Resources, Koch Chemical Technology Group, LLC

Name and Position

Age

Business Experience in Past Five Years (or Relevant Business Experience)

John D. Porter

2022 to present

Senior Vice President and Chief Financial Officer, The Williams Companies, Inc.

Senior Vice President and Chief Financial Officer

2020 to 2021

Vice President, Chief Accounting Officer, Controller and Financial Planning & Analysis, The Williams Companies, Inc.

2017 to 2019

Vice President Enterprise Financial Planning & Analysis and Investor Relations, The Williams Companies, Inc.

2013 to 2017

Director of Investor Relations & Enterprise Planning, The Williams Companies, Inc.

Chad A. Teply

2023 to present

Senior Vice President – Transmission & Gulf of America, The Williams Companies, Inc.

Senior Vice President – Transmission & Gulf of America

2020 to 2023

Senior Vice President – Project Execution, The Williams Companies, Inc.

2017 to 2020

Senior Vice President – Business Policy and Development, PacifiCorp (a Berkshire Hathaway Energy Company)

T. Lane Wilson

2017 to present

Senior Vice President and General Counsel, The Williams Companies, Inc.

Senior Vice President and General Counsel

Chad J. Zamarin

2023 to present

Executive Vice President of Corporate Strategic Development, The Williams Companies, Inc.

Executive Vice President of Corporate Strategic Development

2017 to 2023

Senior Vice President – Corporate Strategic Development, The Williams Companies, Inc.

2017 to 2018

Director of the general partner, Williams Partners L.P.

2014 to 2017

President – Pipeline and Midstream, Cheniere Energy, Inc.

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Williams’ common stock is listed on the New York Stock Exchange under the symbol “WMB.” At the close of business on February 20, 2025, Williams had 5,553 holders of record of common stock.

Transco and NWP are indirectly wholly owned by Williams.

Cash distributions declared and paid to Williams are as follows:


	Year Ended December 31,
	2024		2023
	(Millions)
Transco	$	1,145	$	1,220
NWP	$	150	$	155

In January 2025, Transco and NWP declared and paid cash distributions to Williams of $246 million and $24 million, respectively.

Share Repurchase Program

In September 2021, Williams’ Board of Directors authorized a share repurchase program with a maximum dollar limit of $1.5 billion. Repurchases may be made from time to time in the open market, by block purchases, in privately negotiated transactions, or in such other manner as determined by management. Williams will also determine the timing and amount of any repurchases based on market conditions and other factors. The share repurchase program does not obligate Williams to acquire any particular amount of common stock, and it may be suspended or discontinued at any time. This share repurchase program does not have an expiration date. Williams’ purchases of its equity securities are as follows:


Period	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under the Plans or Programs
October 1 - October 31, 2024	—	$	—	—	$	1,360,938,325
November 1 - November 30, 2024	—	$	—	—	$	1,360,938,325
December 1 - December 31, 2024	—	$	—	—	$	1,360,938,325
Total	—			—

Performance Graph

Set forth below is a line graph comparing Williams’ cumulative total stockholder return on common stock (assuming reinvestment of dividends) with the cumulative total return of the S&P 500 Stock Index, the Bloomberg Americas Pipelines Index, and the Arca Natural Gas Index for the period of five fiscal years commencing January 1, 2020. The Bloomberg Americas Pipelines Index is composed of Enbridge Inc., TC Energy Corporation, Kinder Morgan, Inc., ONEOK, Inc., Cheniere Energy, Inc., Pembina Pipeline Corporation, Targa Resources Corp., and Williams. The Arca Natural Gas Index is comprised of 20 highly capitalized companies in the natural gas industry

involved primarily in natural gas exploration and production and natural gas pipeline transportation and transmission. The graph below assumes an investment of $100 at the beginning of the period.


	2019	2020	2021	2022	2023	2024
The Williams Companies, Inc.	100.0	92.4	127.9	170.1	190.4	309.1
S&P 500 Index	100.0	118.4	152.3	124.7	157.5	196.8
Bloomberg Americas Pipelines Index	100.0	79.1	106.1	122.6	131.1	187.2
Arca Natural Gas Index	100.0	86.5	138.8	177.7	191.5	231.6

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations


Combined Management’s Discussion and Analysis of Financial Condition and Results of Operations			Page
General			56
Company Outlook			59
Critical Accounting Estimates			62
Results of Operations			65
Williams			65
Transco			78
N WP			81
Management ’s Discussion and Analysis of Financial Condition and Liquidity			83

General

Williams is an energy company committed to being the leader in providing infrastructure that safely delivers natural gas products to reliably fuel the clean energy economy. Its operations are located in the United States.

Williams’ interstate natural gas pipeline strategy is to create value by maximizing the utilization of its pipeline capacity by providing high-quality, low-cost transportation of natural gas to large and growing markets. Williams’ gas pipeline businesses’ interstate transmission and storage activities are subject to regulation by the FERC. As such, Williams’ rates and charges for the transportation of natural gas in interstate commerce, and the extension, expansion or abandonment of jurisdictional facilities and accounting, among other things, are subject to regulation. The rates are established primarily through the FERC’s ratemaking process, but Williams may also negotiate rates with its customers pursuant to the terms of its tariffs and FERC policy. Changes in commodity prices and volumes transported have limited near-term impact on these revenues because the majority of the cost of service is recovered through firm capacity reservation charges in transportation rates.

The ongoing strategy of Williams’ midstream operations is to safely and reliably operate large-scale midstream infrastructure where its assets can be fully utilized and drive low per-unit costs. Williams focuses on consistently attracting new business by providing highly reliable service to its customers. These services include natural gas gathering, processing, treating, compression and storage; NGL fractionation, transportation and storage; and crude oil production handling and transportation, as well as marketing services for NGL, crude oil, and natural gas.

Consistent with the manner in which Williams’ chief operating decision maker evaluates performance and allocates resources, Williams’ operations are conducted, managed, and presented within the following reportable segments: Transmission & Gulf of America, Northeast G&P, West, and Gas & NGL Marketing Services. All remaining business activities, including upstream operations, certain new energy ventures, and corporate activities, are included in Other. Williams’ reportable segments are comprised of the following business activities:

•Transmission & Gulf of America is comprised of the Transco, NWP, and MountainWest interstate natural gas pipelines, and their related natural gas storage facilities, as well as natural gas gathering and processing and crude oil production handling and transportation assets in the Gulf Coast region, including Discovery, a former 60 percent equity-method investment in which Williams acquired the remaining ownership interest in August 2024 (see Note 3 – Acquisitions and Divestitures), a 51 percent interest in Gulfstar One, and a 50 percent equity-method investment in Gulfstream. Transmission & Gulf of America also includes natural gas storage facilities and pipelines providing services in north Texas, and also in Louisiana and Mississippi related to the January 2024 Gulf Coast Storage Acquisition (see Note 3 – Acquisitions and Divestitures).

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Management’s Discussion and Analysis (Continued)

investment in Laurel Mountain, a 50 percent equity-method investment in Blue Racer, and Appalachia Midstream Investments.

•West is comprised of gas gathering, processing, and treating operations in the Rocky Mountain region of Colorado and Wyoming, the Barnett Shale region of north-central Texas, the Eagle Ford Shale region of south Texas, the Haynesville Shale region of east Texas and northwest Louisiana, the Mid-Continent region which includes the Anadarko and Permian basins, and the DJ Basin of Colorado which includes RMM, a former 50 percent equity-method investment in which Williams acquired the remaining ownership interest in November 2023 (see Note 3 – Acquisitions and Divestitures). This segment also includes NGL storage facilities, an undivided 50 percent interest in an NGL fractionator near Conway, Kansas, and a 50 percent equity-method investment in OPPL.

Unless indicated otherwise, the following discussion and analysis of results of operations and financial condition and liquidity relates to Williams’ current continuing operations and should be read in conjunction with the financial statements and notes thereto included in Part II, Item 8 of this report.

Dividends

In December 2024, Williams paid a regular quarterly dividend of $0.4750 per share. On January 28, 2025, Williams’ board of directors approved a regular quarterly dividend of $0.5000 per share payable on March 31, 2025.

Overview of Year Ended December 31, 2024

Net income (loss) attributable to The Williams Companies, Inc. for the year ended December 31, 2024, decreased $954 million compared to the year ended December 31, 2023. Further discussion of the results is found in this report in the Results of Operations.

Recent Developments

Transco FERC Rate Case Filing

On August 30, 2024, Transco filed a general rate case with the FERC for an overall increase in rates. In September 2024, with the exception of certain rates that reflected a rate decrease, the FERC accepted and suspended Transco’s general rate filing to be effective March 1, 2025, subject to refund and the outcome of hearing procedures established by the FERC. The specific rates that reflected a rate decrease were accepted, without suspension, to be effective October 1, 2024, as requested by Transco, and will not be subject to refund. The impact of the rates reflecting a rate decrease is expected to reduce revenues by approximately $1 million per month beginning October 1, 2024.

Expansion Project Updates

Significant expansion project updates for the period, including projects placed into service are described below. Ongoing major expansion projects are discussed later in Company Outlook.

Transmission & Gulf of America

Deepwater Whale Project

In August 2021, Williams reached an agreement with two third-parties to provide offshore natural gas gathering and crude oil transportation services as well as onshore natural gas processing services. The project expands its existing Western Gulf of America offshore infrastructure via a 26-mile gas lateral pipeline from the

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Management’s Discussion and Analysis (Continued)

Whale platform to the existing Perdido gas pipeline and adds a new 124-mile oil pipeline from the Whale platform to Williams’ existing junction platform. This project was placed into service in January 2025.

Southside Reliability Enhancement

In July 2023, Transco received approval from the FERC for the project, which involves an expansion of Transco’s existing natural gas transmission system to provide incremental firm transportation capacity from receipt points in Virginia and North Carolina to delivery points in North Carolina. This project went into service in the fourth quarter of 2024. The project increased capacity by 423 Mdth/d.

Regional Energy Access

In January 2023, Transco received approval from the FERC for the project to expand Transco’s existing natural gas transmission system to provide incremental firm transportation capacity from receipt points in northeastern Pennsylvania to multiple delivery points in Pennsylvania, New Jersey, and Maryland. Transco placed approximately half of the project into service in the fourth quarter of 2023 and placed the remainder of the project into service in August 2024. The project increased capacity by 829 Mdth/d.

On January 24, 2025, the FERC issued an Order on Remand Reinstating Certificate and Abandonment Authorization (Remand Order) for the project. The Remand Order was issued in response to the D.C. Circuit Court of Appeals’ decision in New Jersey Conservation Foundation, et al., v. FERC, which vacated the FERC certificate order for the project and remanded the matter to the FERC for appropriate action. In the Remand Order, the FERC (1) continued to find that the project is needed, (2) affirmed its decision not to make a significance determination regarding greenhouse gas emissions, (3) considered Transco’s measures to reduce greenhouse gas emissions, and (4) concluded that the benefits of the project outweigh the adverse impacts. Accordingly, the Remand Order reinstated the certificate and abandonment authority for the project as issued in the FERC’s original certificate order. The authorization took effect upon the issuance of the mandate by the D.C. Circuit Court of Appeals, which occurred on January 29, 2025.

Data Center Power Projects

Williams continues to pursue projects to support the power demands created by new data center development. Williams is in the process of ordering major equipment and long-lead time items for the most mature of these expected projects. These advanced purchases are supported by reimbursement agreements from the potential customer.

Acquisitions and Divestitures

Crowheart Acquisition

As of December 31, 2023, Williams had an agreement regarding certain crude oil and natural gas properties in the Wamsutter basin in Wyoming under which it owned a 75 percent undivided interest in each well’s working interest and proportionally consolidated its undivided interest. On November 1, 2024, Williams closed on the acquisition of a third-party operator, Crowheart Energy, LLC, for $307 million cash, subject to working capital and post-closing adjustments. After closing on the acquisition, Williams owns more than a 90 percent working interest in each well. The purpose of this acquisition was to consolidate Williams’ interests in the Wamsutter basin and further optimize development in the area to continue to supply its gathering and processing assets (see Note 3 – Acquisitions and Divestitures).

Discovery Acquisition

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Management’s Discussion and Analysis (Continued)

investment to fair value included in Other investing income (loss) – net in the Consolidated Statement of Income in the third quarter of 2024. The purpose of this acquisition was to expand Williams’ gathering, processing, and transportation presence in the Gulf of America region. Discovery continues to be reported within the Transmission & Gulf of America segment (see Note 3 – Acquisitions and Divestitures).

Sale of Aux Sable interest

Also on August 1, 2024, Williams completed the sale of its equity-method investments in Aux Sable in Williams’ Northeast G&P segment for total consideration of $161 million. As a result of this sale, Williams recorded a gain of $149 million included in Other investing income (loss) – net in the Consolidated Statement of Income in the third quarter of 2024 (see Note 8 – Investing Activities).

Gulf Coast Storage Acquisition

On January 3, 2024, Williams closed on the acquisition from Hartree Partners LP for $1.95 billion of 100 percent of a strategic portfolio of natural gas storage facilities and pipelines, located in Louisiana and Mississippi. The purpose of this acquisition, which is reported in the Transmission & Gulf of America segment, was to expand Williams’ natural gas storage footprint in the Gulf Coast region. The Gulf Coast Storage Acquisition was funded with cash on hand and $100 million of deferred consideration. On January 3, 2025, Williams paid the remaining $100 million of the Gulf Coast Storage Acquisition purchase price obligation (see Note 3 – Acquisitions and Divestitures).

Company Outlook

Williams’ strategy is to provide a large-scale, reliable, and clean energy infrastructure designed to maximize the opportunities created by the vast supply of natural gas and natural gas products that exists in the United States. Williams accomplishes this by connecting the growing demand for cleaner fuels and feedstocks with our major positions in the premier natural gas and natural gas products supply basins. Williams continues to maintain a strong commitment to safety, environmental stewardship including seeking opportunities for renewable energy ventures, operational excellence, and customer satisfaction. Williams believes that accomplishing these goals will position us to deliver safe, reliable, clean energy services to its customers and an attractive return to shareholders. Williams’ business plan for 2025 includes a continued focus on earnings and cash flow growth.

In 2025, Williams’ operating results are expected to benefit from the continued growth in the Transmission & Gulf of America segment, primarily reflecting the impacts of numerous expansion projects at Transco and the Gulf of America. Additionally, growth in 2025 includes the impact of the Transco rate case and higher gathering and processing results associated with growth in the DJ Basin and the Northeast. Williams also expects increases in Haynesville Shale volumes, including partial year impact of the Louisiana Energy Gateway expansion project and higher expected results from its upstream operations, including the full year impact of the Crowheart Acquisition. These increases are partially offset by a modest increase in expenses and lower expected Eagle Ford results in our West segment related to minimum volume commitment reductions.

Williams seeks to maintain a strong financial position and liquidity, as well as manage a diversified portfolio of safe, clean, and reliable energy infrastructure assets that continue to serve key growth markets and supply basins in the United States. Williams’ growth capital and investment expenditures in 2025 are expected to range from $1.65 billion to $1.95 billion, excluding acquisitions. Growth capital spending in 2025 primarily includes projects supporting growth in the Haynesville Shale basin (including the Louisiana Energy Gateway expansion project), Transco expansions, all of which are fully contracted with firm transportation agreements, and projects supporting the Northeast G&P business. Williams also expects to invest capital in the development of its upstream oil and gas properties. In addition to growth capital and investment expenditures, Williams also remains committed to projects that maintain its assets for safe and reliable operations, as well as projects that reduce emissions, and meet legal, regulatory, and/or contractual commitments.

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Management’s Discussion and Analysis (Continued)

Potential risks and obstacles that could impact the execution of Williams’ plan include:

•A global recession, which could result in downturns in financial markets and commodity prices, as well as impact demand for natural gas and related products;

•Opposition to, and regulations affecting, our infrastructure projects, including the risk of delay or denial in permits and approvals needed for our projects;

•Counterparty credit and performance risk;

•Unexpected significant increases in capital expenditures or delays in capital project execution, including increases from inflation or delays caused by supply chain disruptions;

•Unexpected changes in customer drilling and production activities, which could negatively impact gathering and processing volumes;

•Lower than anticipated demand for natural gas and natural gas products which could result in lower-than-expected volumes, energy commodity prices, and margins;

•General economic, financial markets, or industry downturns, including increased inflation, interest rates, or tariffs;

•Physical damages to facilities, including damage to offshore facilities by weather-related events;

•Other risks set forth under Part I, Item 1A. Risk Factors.

Expansion Projects

Williams’ ongoing major expansion projects include the following:

Transmission & Gulf of America

Deepwater Shenandoah Project

In June 2021, Williams reached an agreement with two third-parties to provide offshore natural gas gathering and transportation services as well as onshore natural gas processing services. The project expands existing Gulf of America offshore infrastructure connecting to a third-party offshore lateral pipeline from the Shenandoah platform to Discovery’s existing Keathley Canyon Connector pipeline, adds onshore processing facilities at Larose, Louisiana to handle the expected rich Shenandoah production, and the natural gas liquids will be fractionated and marketed at Discovery’s Paradis plant in Louisiana. Williams plans to place the project into service in the second quarter of 2025.

Overthrust Westbound Compression Expansion

In October 2024, MountainWest received approval from the FERC for the project, which involves an expansion of MountainWest’s existing natural gas transmission system to provide incremental firm transportation capacity from multiple receipt points in Wamsutter, Wyoming to a delivery point in Opal, Wyoming. MountainWest plans to place the project into service as early as the fourth quarter of 2025, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 325 Mdth/d.

Texas to Louisiana Energy Pathway

In January 2024, Transco received approval from the FERC for the project, which involves an expansion of Transco’s existing natural gas transmission system to provide firm transportation capacity from receipt points in south Texas to delivery points in Texas and Louisiana. Transco plans to place the project into service during the first quarter of 2025, assuming timely receipt of all necessary regulatory approvals. The project is expected to provide 364 Mdth/d of new firm transportation service through a combination of increasing capacity, converting interruptible capacity to firm, and utilizing existing capacity.

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Management’s Discussion and Analysis (Continued)

Southeast Energy Connector

In November 2023, Transco received approval from the FERC for the project, which involves an expansion of Transco’s existing natural gas transmission system to provide incremental firm transportation capacity from receipt points in Mississippi and Alabama to a delivery point in Alabama. Transco plans to place the project into service in the second quarter of 2025, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 150 Mdth/d.

Commonwealth Energy Connector

In November 2023, Transco received approval from the FERC for the project, which involves an expansion of Transco’s existing natural gas transmission system to provide incremental firm transportation capacity in Virginia. Transco plans to place the project into service as early as the fourth quarter of 2025, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 105 Mdth/d.

Alabama Georgia Connector

In March 2024, Transco received approval from the FERC for the project, which involves an expansion of Transco’s existing natural gas transmission system to provide incremental firm transportation capacity from Transco’s Station 85 pooling point in Alabama to customers in Georgia. Transco plans to place the project into service as early as the fourth quarter of 2025, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 64 Mdth/d.

Southeast Supply Enhancement

In October 2024, Transco filed a certificate application with the FERC for the project, which involves an expansion of Transco’s existing natural gas transmission system to provide incremental firm transportation capacity from receipt points in Virginia to delivery points in Virginia, North Carolina, South Carolina, Georgia, and Alabama. Transco plans to place the project into service as early as the fourth quarter of 2027, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 1,597 Mdth/d.

Gillis West

Transco plans to file the prior notice application for the project with the FERC in 2025, which involves an expansion of Transco’s existing natural gas transmission system to provide incremental firm transportation capacity from receipt points in Louisiana to delivery points in Texas. Transco plans to place the project into service as early as the fourth quarter of 2025, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 115 Mdth/d.

Ryckman Creek Loop

NWP plans to file the prior notice application for the project with the FERC in 2025. The Ryckman Creek Loop expansion involves an expansion of NWP’s existing natural gas transmission system to provide incremental firm transportation capacity from a receipt point in northeast Oregon (Stanfield) to multiple delivery points in southwest Wyoming. NWP plans to place the project into service as early as the fourth quarter of 2025, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 50 MDth/d.

Stanfield South Project

The Stanfield South Project on NWP’s existing natural gas transmission system will provide year-round transportation capacity from the Stanfield receipt point in Oregon to multiple delivery points in Idaho. NWP plans to place the project into service as early as the fourth quarter of 2025, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 80 Mdth/d.

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Management’s Discussion and Analysis (Continued)

Naughton Coal-to-Gas Conversion

The Naughton Coal-to-Gas Conversion project on NWP’s existing natural gas transmission system will provide year-round transportation capacity to a power plant in southwest Wyoming. NWP plans to place the project into service as early as the second quarter of 2026, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 98 Mdth/d.

Kelso-Beaver Reliability Project

The Kelso-Beaver Reliability project on NWP’s existing natural gas transmission system will provide year-round transportation capacity to various receipt and delivery points in Oregon. NWP plans to file the certificate application with the FERC in 2025. NWP plans to place the project into service during the fourth quarter of 2028, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 183 Mdth/d.

Huntingdon Connector

The Huntingdon Connector project on NWP’s existing natural gas transmission system will provide year-round transportation capacity from the Sumas receipt point to various delivery points in Washington. NWP plans to file the prior notice application for the project with the FERC in 2026. NWP plans to place the project in service during the fourth quarter of 2026, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 87 Mdth/d.

Wild Trail Expansion

The Wild Trail Expansion project on NWP’s existing natural gas transmission system will provide year-round transportation capacity from the White River Hub receipt point in western Colorado to various delivery points in southwest Wyoming and southern Colorado. This project is fully subscribed by an affiliate within Williams’ Gas & NGL Marketing Services segment. NWP plans to file the certificate application with the FERC in 2025. NWP plans to place the project in service during the fourth quarter of 2027, assuming timely receipt of all necessary regulatory approvals. The project is expected to increase capacity by 83 Mdth/d.

West

Louisiana Energy Gateway

In August 2024, Williams began construction activities on new natural gas gathering assets which are expected to gather 1.8 Bcf/d of natural gas produced in the Haynesville Shale basin for delivery to premium markets, including Transco, industrial markets, and growing LNG export demand along the Gulf Coast. This project is expected to go into service in the third quarter of 2025.

Haynesville Gathering Expansion

In February 2023, Williams announced its agreement with a third party to facilitate natural gas production growth in the Haynesville Shale basin. Williams is constructing a greenfield gathering system in support of the third party’s 26,000-acre dedication. The system, once completed, will provide natural gas gathering services to the third party. The third party has also agreed to a long-term capacity commitment on Williams’ Louisiana Energy Gateway expansion project. This project is expected to go into service in third quarter 2025.

Critical Accounting Estimates

Preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions. The nature of these estimates and assumptions is material due to the subjectivity and judgment necessary, or the susceptibility of such matters to change, and the impact of these on the financial condition or results of operations.

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Management’s Discussion and Analysis (Continued)

Williams’ Pension and Postretirement Obligations

Williams has pension and other postretirement benefit plans that require the use of assumptions and estimates to determine the benefit obligations and costs. These estimates and assumptions involve significant judgment and actual results will likely be different than anticipated. Estimates and assumptions utilized include the expected long-term rates of return on plan assets, discount rates, cash balance interest crediting rate, and employee demographics, including retirement age and mortality. These assumptions are reviewed annually and adjustments are made as needed. The assumptions utilized to compute the benefit obligations and costs are shown in Note 7 – Employee Benefit Plans.

The following table presents the estimated increase (decrease) in net periodic benefit cost and obligations resulting from a one-percentage-point change in the specific assumption.


	Benefit Cost				Benefit Obligation
	One- Percentage- Point Increase		One- Percentage- Point Decrease		One- Percentage- Point Increase		One- Percentage- Point Decrease
	(Millions)
Pension benefits:
Discount rate	$	3	$	(4)	$	(62)	$	71
Expected long-term rate of return on plan assets	(11)		11		—		—
Cash balance interest crediting rate	4		(4)		45		(39)
Other postretirement benefits:
Discount rate	(3)		3		(11)		14
Expected long-term rate of return on plan assets	(3)		3		—		—

Williams’ expected long-term rates of return on plan assets, as determined at the beginning of each fiscal year, are based on historical returns, forward-looking capital market expectations of at least 10 years from Williams’ third-party independent investment advisor, as well as the investment strategy and relative weightings of the asset classes within the investment portfolio. Williams’ expected long-term rate of return on plan assets used for Williams’ pension plans was 5.31 percent in 2024. The 2024 actual return on plan assets for Williams’ pension plans was approximately 8.0 percent. The 10-year average rate of return on pension plan assets through December 2024 was approximately 6.6 percent. The expected rates of return on plan assets are long-term in nature and are not significantly impacted by short-term market performance.

The discount rates for Williams’ pension and other postretirement benefit plans are determined separately based on an approach specific to Williams’ plans, which considers a yield curve of high-quality corporate bonds and the duration of the expected benefit cash flows of each plan.

The cash balance interest crediting rate assumption represents the average long-term rate by which the pension plans’ cash balance accounts are expected to grow. Interest on the cash balance accounts is based on the 30-year U.S. Treasury securities rate.

Regulatory Accounting

Transco and NWP are regulated by the FERC. Accounting Standards Codification (ASC) Topic 980, “Regulated Operations,” (ASC 980) provides that certain costs that would otherwise be charged to expense should be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense should be deferred as regulatory liabilities, based on the expected return to customers in future rates. Management’s expected recovery of deferred costs and return of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment. Transco and NWP record certain incurred costs and obligations as regulatory assets or liabilities if, based on regulatory orders or other available evidence, it is probable that the costs or obligations will be included in amounts allowable for recovery or refunded in future rates.

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Management’s Discussion and Analysis (Continued)

Accounting for businesses that are regulated and apply the provisions of ASC 980 can differ from the accounting requirements for non-regulated businesses. Transactions that are recorded differently as a result of regulatory accounting requirements include the capitalization of an equity return component on regulated capital projects, capitalization of other project costs, retirements of general plant assets, levelized cost of service, employee-related benefits, environmental costs, negative salvage, asset retirement obligations (ARO) and other costs and taxes included in, or expected to be included in, future rates. As rate-regulated entities, Transco’s and NWP’s management has determined that it is appropriate to apply the accounting prescribed by ASC 980 and, accordingly, the accompanying financial statements include the effects of the types of transactions described above that result from regulatory accounting requirements. Management’s assessment of the probability of recovery or pass through of regulatory assets and liabilities requires judgment and interpretation of laws and regulatory commission orders. If, for any reason, either Transco or NWP ceases to meet the criteria for application of regulatory accounting treatment for all or part of our operations, the regulatory assets and liabilities related to those portions ceasing to meet such criteria would be eliminated from the Balance Sheet and included in the Statement of Net Income for the period in which the discontinuance of regulatory accounting treatment occurs and can be estimated, unless otherwise required to be recorded under other provisions of U.S. generally accepted accounting principles.

The aggregate amount of regulatory assets reflected on Transco’s and NWP’s Balance Sheets at December 31, 2024, is $394 million and $55 million, respectively. The aggregate amount of regulatory liabilities reflected on Transco’s and NWP’s Balance Sheets at December 31, 2024, is $1.0 billion and $253 million, respectively. A summary of regulatory assets and liabilities is included in Note 10 – Regulatory Assets and Liabilities.

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Management’s Discussion and Analysis (Continued)

Results of Operations

Williams’ Consolidated Overview

The following table and discussion is a summary of Williams’ consolidated results of operations for the three years ended December 31, 2024, and should be read in conjunction with the results of operations by segment, as discussed in further detail following this consolidated overview discussion.



		Year Ended December 31,

		2024		$ Change from 2023*	% Change from 2023*		2023		$ Change from 2022*	% Change from 2022*		2022
	(Dollars in millions)
Revenues:
Service revenues		$	7,628	+602	+9	%	$	7,026	+490	+7	%	$	6,536

Product sales and service revenues – commodity consideration		3,125		+200	+7	%	2,925		-1,891	-39	%	4,816
Net gain (loss) from commodity derivatives		(250)		-1,206	NM		956		+1,343	NM		(387)
Total revenues		10,503					10,907					10,965
Costs and expenses:
Product costs and net processing commodity expenses		2,118		-83	-4	%	2,035		+1,422	+41	%	3,457

Operating and maintenance expenses		2,179		-195	-10	%	1,984		-167	-9	%	1,817
Depreciation and amortization expenses		2,219		-148	-7	%	2,071		-62	-3	%	2,009
Selling, general, and administrative expenses		708		-43	-6	%	665		-29	-5	%	636


Gain on sale of business		—		-129	-100	%	(129)		+129	NM		—

Other (income) expense – net		(60)		+30	+100	%	(30)		+58	NM		28
Total costs and expenses		7,164					6,596					7,947
Operating income (loss)		3,339					4,311					3,018
Equity earnings (losses)		560		-29	-5	%	589		-48	-8	%	637

Other investing income (loss) – net		343		+235	NM		108		+92	NM		16
Interest expense		(1,364)		-128	-10	%	(1,236)		-89	-8	%	(1,147)
Net gain from Energy Transfer litigation judgment		—		-534	-100	%	534		+534	NM		—
Other income (expense) – net		108		+9	+9	%	99		+81	NM		18
Income (loss) before income taxes		2,986					4,405					2,542
Less: Provision (benefit) for income taxes		640		+365	+36	%	1,005		-580	-136	%	425
Income (loss) from continuing operations		2,346					3,400					2,117
Income (loss) from discontinued operations		—		+97	+100	%	(97)		-97	NM		—
Net income (loss)		2,346					3,303					2,117
Less: Net income attributable to noncontrolling interests		121		+3	+2	%	124		-56	-82	%	68
Net income (loss) attributable to The Williams Companies, Inc.		$	2,225	-954	-30	%	$	3,179	+1,130	+55	%	$	2,049

_______

* + = Favorable change; - = Unfavorable change; NM = A percentage calculation is not meaningful due to a change in signs, a zero-value denominator, or a percentage change greater than 200.

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Management’s Discussion and Analysis (Continued)

2024 vs. 2023

Service revenues increased primarily due to:

•Higher volumes from the November 2023 DJ Basin Acquisitions at the West segment and the January 2024 Gulf Coast Storage, August 2024 Discovery, and February 2023 MountainWest Acquisitions at the Transmission & Gulf of America segment; partially offset by lower volumes from the September 2023 sale of certain liquids pipelines at the Transmission & Gulf of America segment (See Note 3 – Acquisitions and Divestitures),

•Higher revenues associated with expansion projects at the Transmission & Gulf of America segment, partially offset by

•Lower gathering volumes at the West and Northeast G&P segments.

The net sum of Product sales and service revenues – commodity consideration, Product costs and net processing commodity expenses, and net realized gains and losses on commodity derivatives related to sales of product and shrink gas purchases for processing plants for the reportable segments comprise Commodity Margins. Service revenues - commodity consideration represent payments received in the form of commodities for processing services provided. Most of these commodity volumes are sold during the month processed and are offset within Product costs and net processing commodity expenses. The sum of Product sales and net realized gains and losses on commodity derivatives related to the upstream operations comprise Net realized product sales.

The Product sales and service revenues – commodity consideration increase primarily consists of:

•Higher marketing sales activities primarily at the West segment primarily related to the DJ Basin Acquisitions and Transmission & Gulf of America segment primarily related to the Discovery Acquisition, as previously discussed; partially offset by lower marketing sales activities related to NGLs at the Gas & NGL Marketing Services segment, primarily related to activity associated with the sale certain liquids pipelines, as previously discussed. Net natural gas marketing sales were impacted by higher storage costs; partially offset by

•Lower system management gas sales primarily at the Transmission & Gulf of America segment;

•Lower product sales from upstream operations; partially offset by higher volumes from the November 2024 Crowheart Acquisition at Other (See Note 3 – Acquisitions and Divestitures);

•Lower equity NGL sales and commodity consideration revenues associated with NGL production activity primarily at the West segment; partially offset by higher activity in the Transmission & Gulf of America segment primarily due to the Discovery Acquisition, as previously discussed.

As Williams is acting as agent for natural gas marketing customers, its natural gas marketing product sales are presented net of the related costs of those activities within the Gas & NGL Marketing Services segment.

Net gain (loss) from commodity derivatives includes realized and unrealized gains and losses from derivative instruments reflected within Total revenues primarily in the Gas & NGL Marketing Services and West segments, and at Other (see Note 17 – Commodity Derivatives).

Williams experiences significant earnings volatility from the fair value accounting required for the derivatives used to hedge a portion of the economic value of the underlying transportation and storage capacity portfolios as well as upstream-related production. However, the unrealized fair value measurement gains and losses are generally offset by valuation changes in the economic value of the underlying production or transportation and storage capacity contracts, which are not recognized until the underlying transaction occurs.

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Management’s Discussion and Analysis (Continued)

The Product costs and net processing commodity expenses increase primarily consists of:

•Higher marketing activities primarily at the West segment primarily related to the DJ Basin Acquisitions and Transmission & Gulf of America segment primarily related to the Discovery Acquisition, as previously discussed; partially offset by lower marketing activities primarily related to NGLs at the Gas & NGL Marketing Services segment; partially offset by

•Lower shrink natural gas purchases and commodity consideration costs associated with Williams’ equity NGL production activities primarily at the West segment.

Operating and maintenance expenses increased primarily due to operating costs of the assets acquired at the West and Transmission & Gulf of America segments; as well as unfavorable changes in employee-related costs, including the impact of a change in a practice related to payroll timing; and the net imbalance liability due to changes in pricing.

Depreciation and amortization expenses increased primarily related to the assets acquired at the Transmission & Gulf of America and West segments and an increase at Transco related to additional assets placed in service. The increase is partially offset by lower amortization of intangibles related to the acquisition of Sequent Energy Management, L.P. and Sequent Energy Canada, Corp. (Sequent) in 2021.

Selling, general, and administrative expenses increased primarily due to employee-related costs, including the impact of a change in a practice related to payroll timing, partially offset by lower acquisition and transition-related costs associated with the MountainWest Acquisition (see Note 3 – Acquisitions and Divestitures).

Gain on sale of business reflects a gain from the sale of certain liquids pipelines in the Transmission & Gulf of America segment in 2023, as previously discussed.

Other (income) expense – net within Operating income (loss) includes lower project feasibility costs at our Transmission & Gulf of America segment; partially offset by the absence of a 2023 gain related to a contract settlement.

Equity earnings (losses) changed unfavorably primarily due to the impacts of the consolidation of RMM and Discovery, as previously discussed, and the sale of the interests in Aux Sable (see Note 8 – Investing Activities), partially offset by the absence of the share of a loss contingency accrual in 2023 at Aux Sable and favorable results at OPPL.

Other investing income (loss) – net includes gains on the sale of the interests in Aux Sable and the gain on remeasuring the existing equity-method investment in Discovery to fair value with the acquisition of the remaining 40 percent ownership, as previously discussed, partially offset by the absence the 2023 gain on remeasuring the existing equity-method investment in RMM to fair value with the acquisition of the remaining 50 percent ownership (see Note 8 – Investing Activities).

The increase in Interest expense was primarily due to Williams’ 2023 and 2024 debt issuances, and imputed interest on deferred consideration obligations related to the DJ Basin and Gulf Coast Storage Acquisitions, as previously discussed, partially offset by 2023 and 2024 debt retirements (see Note 13 – Debt and Banking Arrangements).

Net gain from Energy Transfer litigation judgment resulted from a favorable ruling on the final order and judgment of Williams’ complaint against Energy Transfer in 2023 (see Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies).

Provision (benefit) for income taxes changed favorably primarily due to lower pre-tax income and a higher benefit associated with decreases in Williams’ estimate of the state deferred income tax rate in both periods. See Note 6 – Provision (Benefit) for Income Taxes for a discussion of the effective tax rate compared to the federal statutory rate for both periods.

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Management’s Discussion and Analysis (Continued)

Income (loss) from discontinued operations in 2023 includes a pre-tax charge of $125 million to increase the accrued liability associated with the Alaska refinery contamination litigation, partially offset by the related income tax effect (see Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies).

2023 vs. 2022

Service revenues increased primarily due to:

•Higher volumes from acquisitions at the Transmission & Gulf of America segment;

•Higher volumes and rates at the Northeast G&P segment; partially offset by

•Lower rates, partially offset by higher volumes at the West segment.

The Product sales and service revenues – commodity consideration decrease primarily consists of:

•Lower marketing sales activities at the Gas & NGL Marketing Services segment;

•Lower sales from upstream operations at Other;

•Lower equity NGL sales prices primarily at the West and Transmission & Gulf of America segments;

•Lower system management gas sales primarily at the West and Transmission & Gulf of America segments.

The Product costs and net processing commodity expenses decrease primarily consists of:

•Lower marketing activities at the Gas & NGL Marketing Services segment;

•Lower costs associated with NGLs acquired as commodity consideration related to Williams’ equity NGL production activities;

•Lower system management gas purchases primarily at the West and Transmission & Gulf of America segments.

•Unfavorable change in unrealized gains and losses from commodity derivatives related to processing plant shrink gas purchases;

•Partially offset by lower natural gas purchases due to lower prices associated with Williams’ equity NGL production activities primarily at the West and Transmission & Gulf of America segments.

Operating and maintenance expenses increased primarily due to higher operating costs, including increased costs associated with the February 2023 MountainWest Acquisition, the April 2022 Trace Acquisition, and the August 2022 NorTex Asset Purchase, and increased scope and timing of operating and maintenance activities.

Depreciation and amortization expenses increased primarily related to the upstream assets, and assets acquired in the February 2023 MountainWest Acquisition, the April 2022 Trace Acquisition, and the August 2022 NorTex Asset Purchase. The increase is partially offset by lower amortization of intangibles related to the acquisition of Sequent in 2021.

Selling, general, and administrative expenses increased primarily due to acquisition and transition-related costs associated with the MountainWest Acquisition.

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Management’s Discussion and Analysis (Continued)

Gain on sale of business resulted from the sale of certain liquids pipelines in the Gulf Coast region, as previously discussed.

Other (income) expense – net within Operating income (loss) changed favorably primarily due to:

•A favorable change associated with regulatory liabilities established for the impacts of deferred income taxes at NWP and the absence of 2022 regulatory charges associated with a decrease in Transco’s estimated deferred state income tax rate;

•The absence of a 2022 loss related to Eminence storage cavern abandonments;

•A 2023 gain related to a contract settlement.

Equity earnings (losses) changed unfavorably primarily due to a decrease at Laurel Mountain and the share of a loss contingency accrual related to the 14 percent ownership in Aux Sable, partially offset by increases at Blue Racer and OPPL.

The favorable change in Other investing income (loss) – net includes higher interest income earned on higher cash and cash equivalent balances, and a gain on remeasuring the existing equity-method investment in RMM, as previously discussed.

The increase in Interest expense was primarily due to Williams’ 2023 debt issuances and MountainWest’s long-term debt, partially offset by an increase in interest capitalized related to ongoing expansion projects.

Net gain from Energy Transfer litigation judgment resulted from a favorable ruling on the final order and judgment of Williams’ complaint against Energy Transfer, as previously discussed.

The favorable change in Other income (expense) – net below Operating income (loss) includes an increase in equity allowance for funds used during construction (equity AFUDC) at the Transmission & Gulf of America segment and the related effects of deferred taxes within Other.

Income (loss) from discontinued operations in 2023 includes a pre-tax charge of $125 million to increase the accrued liability associated with our Alaska refinery contamination litigation, partially offset by the related income tax effect.

Provision (benefit) for income taxes changed unfavorably primarily due to higher pre-tax income, the absence of a benefit related to the release of valuation allowances on deferred income tax assets in 2022, a lower benefit associated with decreases in the Williams’ estimate of the state deferred income tax rate in both periods, and the absence of 2022 federal income tax settlements.

The unfavorable change in Net income (loss) attributable to noncontrolling interests is primarily due to higher results at Cardinal and the Northeast JV.

Period-Over-Period Operating Results – Williams’ Segments

Williams’ chief operating decision maker evaluates segment operating performance based upon Modified EBITDA. Note 19 – Segment Disclosures includes a reconciliation of this non-GAAP measure to Income (loss) before income taxes from continuing operations. Management uses Modified EBITDA because it is an accepted financial indicator used by investors to compare company performance. In addition, management believes that this measure provides investors an enhanced perspective of the operating performance of Williams’ assets. Modified EBITDA should not be considered in isolation or as a substitute for a measure of performance prepared in accordance with GAAP.

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Management’s Discussion and Analysis (Continued)

Transmission & Gulf of America


	Year Ended December 31,

	2024		2023		2022
	(Millions)
Service revenues	$	4,246	$	3,858	$	3,579


Product sales and service revenues – commodity consideration (1)	382		290		468
Net realized gain (loss) from commodity derivatives (1)	—		2		—
Segment revenues	4,628		4,150		4,047



Product costs and net processing commodity expenses (1)	(329)		(259)		(425)
Other segment costs and expenses	(1,199)		(1,157)		(1,141)


Gain on sale of business	—		129		—
Proportional Modified EBITDA of equity-method investments	173		205		193
Transmission & Gulf of America Modified EBITDA	$	3,273	$	3,068	$	2,674

Commodity margins	$	53	$	33	$	43

_______________

(1)Included as a component of Commodity margins.

2024 vs. 2023

Transmission & Gulf of America Modified EBITDA increased primarily due to higher Service revenues, partially offset by the absence of a Gain on sale of business, higher Other segment costs and expenses, and lower Proportional Modified EBITDA of equity-method investments.

Service revenues increased primarily due to:

•A $220 million increase primarily in storage revenues due to the Gulf Coast Storage Acquisition in January 2024 (see Note 3 – Acquisitions and Divestitures);

•A $121 million increase in Transco’s revenues primarily associated with expansion projects and higher park and loan services;

•A $41 million increase primarily in gathering revenues due to the Discovery Acquisition in August 2024 (see Note 3 – Acquisitions and Divestitures);

•A $38 million increase in primarily transportation and storage revenues due to the MountainWest Acquisition in February 2023 (see Note 3 – Acquisitions and Divestitures);

•A $22 million increase in NorTex’s revenues primarily associated with higher storage rates; partially offset by

•A $39 million decrease primarily in transportation revenues due to the sale of certain liquids pipelines in the Gulf Coast region in September 2023 (see Note 3 – Acquisitions and Divestitures);

•A $34 million decrease in the Eastern Gulf region primarily due to shut-ins for producer operational issues at Gulfstar One in the Gunflint and Tubular Bells fields and weather-related events, partially offset by higher primarily production handling volumes from a new well at Gulfstar One in the Pickerel field.

Other segment costs and expenses increased primarily due to:

•Higher operating expenses and administrative costs including higher operating, acquisition and transition costs related to Williams’ Gulf Coast Storage and Discovery Acquisitions, as previously discussed; and

Table of Contents

Management’s Discussion and Analysis (Continued)

employee-related costs, including the impact of a change in a practice related to payroll timing; partially offset by significantly lower acquisition and transition costs related to Williams’ MountainWest Acquisition, as previously discussed, contract services at Transco, and operating costs related to the sale of certain liquids pipelines in the Gulf Coast region, as previously discussed;

•Unfavorable change in the amortization of regulatory pension liabilities at Transco; partially offset by

•Lower project feasibility costs;

•A favorable change in equity AFUDC primarily as a result of increased capital expenditures at Williams’ regulated businesses.

Commodity margins increased primarily due to a $19 million increase from Williams’ equity NGLs primarily due to the Discovery Acquisition, as previously discussed.

Gain on sale of business reflects a gain recognized on the sale of certain liquids pipelines in the Gulf Coast region in September 2023, as previously discussed.

Proportional Modified EBITDA of equity-method investments decreased primarily due to lower proportional results as Discovery was consolidated, as previously discussed.

2023 vs. 2022

Transmission & Gulf of America Modified EBITDA increased primarily due to higher Service revenues and a Gain on sale of business.

Service revenues increased primarily due to:

•A $222 million increase due to the acquisition of MountainWest primarily in transportation and storage revenues;

•A $42 million increase due to the NorTex Asset Purchase primarily in storage and transportation revenues;

•A $30 million increase in the Eastern Gulf Coast region primarily due to higher production handling volumes from new wells at Devils Tower, partially offset by lower volumes from the Norphlet pipeline due to natural decline;

•A $15 million increase in Transco’s revenues associated with the Regional Energy Access expansion project placed partially in-service in the fourth quarter of 2023;

•A $12 million increase in Transco’s and Northwest Pipeline’s revenues associated with short-term firm transportation; partially offset by

•A $19 million decrease due to lower rates from the FERC rate case settlement effective January 1, 2023, at Northwest Pipeline;

•A $14 million decrease in reimbursable electric power costs and storage rates, offset by similar changes in electricity charges and storage costs, reflected in Other segment costs and expenses;

•A $10 million decrease due to the sale of certain liquids pipelines in the Gulf Coast region in September 2023 primarily in transportation revenues.

Commodity margins decreased primarily due to a $15 million decrease from Williams’ equity NGLs, driven by unfavorable net realized pricing for equity NGL sales, partially offset by lower prices for natural gas purchases associated with its equity NGL production activities.

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Management’s Discussion and Analysis (Continued)

Other segment costs and expenses increased primarily due to:

•Higher operating and administrative costs including higher operating, acquisition, and transition costs related to Williams’ MountainWest Acquisition and NorTex Asset Purchase; and higher costs related to timing and scope of general maintenance activities primarily at Transco, partially offset by lower reimbursable electric power costs and storage costs, which are offset by a similar change in electricity reimbursements and storage revenues reflected in Service revenues; and lower employee-related costs;

•Higher project feasibility costs; partially offset by

•Favorable changes associated with regulatory liabilities established for the impacts of deferred income taxes at Northwest Pipeline associated with the FERC rate case settlement mentioned above in Service revenues and the absence of 2022 regulatory charges associated with decreases in Transco’s estimated deferred state income tax rate;

•A favorable change in equity AFUDC as a result of increased capital expenditures at Transco;

•The absence of losses related to Eminence storage cavern abandonments in 2022.

Gain on sale of business reflects a gain recognized on the sale of certain liquids pipelines in the Gulf Coast region in September 2023, as previously discussed.

Northeast G&P


	Year Ended December 31,

	2024		2023		2022
	(Millions)
Service revenues	$	1,913	$	1,896	$	1,654
Product sales and service revenues – commodity consideration (1)	112		137		148
Segment revenues	2,025		2,033		1,802

Product costs and net processing commodity expenses (1)	(88)		(125)		(138)
Other segment costs and expenses	(581)		(566)		(522)

Proportional Modified EBITDA of equity-method investments	602		574		654
Northeast G&P Modified EBITDA	$	1,958	$	1,916	$	1,796

Commodity margins	$	24	$	12	$	10

(1)Included as a component of Commodity margins.

2024 vs. 2023

Northeast G&P Modified EBITDA increased primarily due to higher Proportional Modified EBITDA of equity-method investments, higher Service revenues, and higher Commodity margins, partially offset by higher Other segment costs and expenses.

Service revenues increased primarily due to:

•A $20 million increase in revenues at the Northeast JV primarily related to higher gathering volumes as well as higher transportation & fractionation, gathering, and processing rates, partially offset by lower transportation & fractionation and processing volumes;

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Management’s Discussion and Analysis (Continued)

•A $16 million increase in joint venture operating fees primarily related to assuming operatorship of Blue Racer effective January 1, 2024, (which is significantly offset by higher Other segment costs and expenses discussed below);

•An $11 million increase in revenues associated with reimbursable expenses, which is offset by similar changes in the charges reflected in Other segment costs and expenses; partially offset by

•A $19 million decrease in gathering revenues at Susquehanna Supply Hub primarily related to lower volumes partially offset by escalated rates;

•A $16 million decrease in gathering revenues in the Utica Shale region primarily related to lower volumes at Flint and Cardinal partially offset by escalated rates.

Commodity margins increased due to a restructured gas purchase deal in 2024 which allowed for margin gain on residue pricing and liquids from fixed recoveries. In addition, Williams was not significantly impacted by system constraints which impacted margins in 2023.

Other segment costs and expenses increased primarily due to higher employee-related costs, including the impact of a change in a practice related to payroll timing, as well as higher operating expenses, including higher electricity and fuel, and increased support costs related to assuming operatorship of Blue Racer effective January 1, 2024 (substantially offset by higher Service revenues discussed above). The increase was partially offset by lower maintenance expenses and the absence of the 2023 loss contingency accrual.

Proportional Modified EBITDA of equity-method investments increased at Aux Sable Liquid Products LP primarily due to the absence of Williams’ $31 million share of a loss contingency accrual related to its former ownership in 2023, as well as the terms of the new product marketing agreement, partially offset by the sale of Williams’ investment in Aux Sable Liquid Products LP in the third quarter of 2024. Additionally, Appalachia Midstream Investments increased primarily driven by higher gathering rates partially offset by lower volumes and higher expenses.

2023 vs. 2022

Northeast G&P Modified EBITDA increased primarily due to higher Service revenues, partially offset by lower Proportional Modified EBITDA of equity-method investments and higher Other segment costs and expenses.

Service revenues increased primarily due to:

•A $92 million increase in revenues at the Northeast JV primarily related to higher transportation & fractionation, processing, and gathering volumes as well as higher processing rates;

•An $84 million increase in revenues in the Utica Shale region primarily related to higher gathering rates resulting from annual cost-of-service contract redeterminations and higher volumes, partially offset by the absence of proceeds from the release of an acreage dedication in 2022;

•A $61 million increase in gathering revenues at Susquehanna Supply Hub primarily related to escalated rates as well as higher volumes.

Other segment costs and expenses increased primarily due to increased scope of operations, a loss contingency accrual, and higher operating taxes.

Proportional Modified EBITDA of equity-method investments decreased at Laurel Mountain due to lower commodity-based gathering rates, MVC, and volumes, and at Aux Sable Liquid Products LP primarily due to Williams’ $31 million share of a loss contingency accrual related to its former ownership in 2023. The decrease was partially offset by an increase at Blue Racer primarily driven by higher gathering and processing volumes. Additionally, Appalachia Midstream Investments increased primarily driven by higher gathering volumes and

Table of Contents

Management’s Discussion and Analysis (Continued)

annual rate escalations at Marcellus South, partially offset by lower gathering rates resulting from annual cost-of-service contract redeterminations and lower volumes at the Bradford Supply Hub.

West


	Year Ended December 31,

	2024		2023		2022
	(Millions)
Service revenues	$	1,718	$	1,502	$	1,542
Product sales and service revenues – commodity consideration (1)	947		544		1,023

Net realized gain (loss) from commodity derivatives relating to service revenues	10		82		(1)
Net realized gain (loss) from commodity derivatives relating to product sales (1)	(6)		7		(3)
Net realized gain (loss) from commodity derivatives	4		89		(4)

Segment revenues	2,669		2,135		2,561

Product costs and net processing commodity expenses (1)	(844)		(517)		(918)
Other segment costs and expenses	(645)		(542)		(564)

Proportional Modified EBITDA of equity-method investments	132		162		132
West Modified EBITDA	$	1,312	$	1,238	$	1,211

Commodity margins	$	97	$	34	$	102

________________

(1) Included as a component of Commodity margins.

2024 vs. 2023

West Modified EBITDA increased primarily due higher Service revenues and Commodity margins, partially offset by higher Other segment costs and expenses, an unfavorable change in Net realized gain (loss) from commodity derivatives relating to service revenues, and lower Proportional Modified EBITDA of equity-method investments.

Service revenues increased primarily due to:

•A $249 million increase in the DJ Basin region associated with the DJ Basin Acquisitions in November 2023 (see Note 3 – Acquisitions and Divestitures);

•A $35 million increase in other NGL operations associated with higher fractionation and transportation revenue due to higher volumes and higher storage fees primarily due to a new contract;

•A $14 million increase in the Wamsutter region primarily associated with higher gathering volumes from increased producer activity as well as higher volumes associated with the absence of weather-related events in first-quarter 2023;

•A $12 million increase associated with reimbursable compressor power and fuel purchases primarily due to the DJ Basin Acquisitions as previously discussed, which are offset by similar changes in Other segment costs and expenses; partially offset by

•A $45 million decrease in the Haynesville Shale region primarily due to lower gathering volumes from decreased producer activity, partially offset by higher gathering rates;

•A $31 million decrease in the Eagle Ford Shale region primarily due to lower MVC revenues;

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Management’s Discussion and Analysis (Continued)

•A $24 million decrease in the Barnett Shale region primarily due to lower gathering rates driven by unfavorable commodity pricing and lower gathering volumes.

Net realized gain (loss) from commodity derivatives relating to service revenues reflects an unfavorable change in settled commodity prices relative to Williams’ natural gas hedge positions.

Commodity margins increased $63 million primarily due to $39 million higher margins associated with the DJ Basin Acquisitions, as previously discussed. Margins also increased $21 million from Williams’ equity NGLs primarily due to lower net realized prices for natural gas purchases and lower volumes of natural gas purchased both associated with equity NGL production activities; partially offset by lower volumes of equity NGL sold and lower net realized NGL sales prices.

Other segment costs and expenses increased primarily due to higher operating and employee-related expenses including those resulting from the DJ Basin Acquisitions, as previously discussed, the absence of favorable contract settlements in first-quarter 2023, an unfavorable change in Williams’ net imbalance liability due to changes in pricing, higher reimbursable compressor power and fuel purchases which are offset in Service revenues, and the impact of a change in a practice related to payroll timing; partially offset by higher system gains and the absence of a fourth quarter 2023 write-down of assets held for sale.

Proportional Modified EBITDA of equity-method investments decreased primarily due to lower proportional results as RMM was consolidated related to the DJ Basin Acquisitions, as previously discussed, partially offset by higher volumes and higher commodity prices at OPPL.

2023 vs. 2022

West Modified EBITDA increased primarily due to a favorable change in Net realized gain (loss) from commodity derivatives relating to service revenues, higher Proportional Modified EBITDA of equity-method investments, and lower Other segment costs and expenses, partially offset by lower Commodity margins and Service revenues.

Service revenues decreased primarily due to:

•A $120 million decrease in the Barnett Shale region primarily due to lower gathering rates driven by unfavorable commodity pricing;

•A $13 million decrease in the Eagle Ford Shale region primarily due to lower MVC revenues, partially offset by escalated gathering rates and higher gathering volumes;

•A $6 million decrease associated with reimbursable compressor power and fuel purchases primarily due to lower prices, which are offset by similar changes in Other segment costs and expenses; partially offset by

•A $69 million increase in the Haynesville Shale region primarily associated with higher gathering volumes including from increased producer activity and the Trace Acquisition in April 2022, partially offset by lower rates driven by unfavorable commodity pricing;

•A $25 million increase in the DJ Basin region primarily associated with the DJ Basin Acquisitions in November 2023 as previously discussed;

•A $15 million increase in our other NGL operations associated with higher storage fees primarily due to a new contract as well as higher fractionation fees primarily due to higher volumes partially offset by lower rates from lower natural gas prices.

Net realized gain (loss) from commodity derivatives relating to service revenues reflects a favorable change in settled commodity prices relative to Williams’ natural gas hedge positions.

Commodity margins decreased $68 million primarily due a $46 million decrease from Williams’ equity NGLs and a $14 million decrease from other sales activities, both primarily due to lower net realized commodity pricing.

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Management’s Discussion and Analysis (Continued)

Other segment costs and expenses decreased primarily due to a favorable change in Williams’ net imbalance liability due to changes in pricing, favorable contract settlements in first-quarter 2023, lower corporate allocations, and lower reimbursable compressor power and fuel purchases which are substantially offset in Service revenues. These items were partially offset by higher operating expenses related to operations including those acquired in the Trace Acquisition and the DJ Basin Acquisitions, lower system gains at Wamsutter, and a fourth quarter 2023 write-down of assets held for sale.

Proportional Modified EBITDA of equity-method investments increased primarily due to higher volumes at OPPL as well as higher volumes at RMM, partially offset by lower proportional results as RMM was consolidated related to the DJ Basin Acquisitions.

Gas & NGL Marketing Services


	Year Ended December 31,

	2024		2023		2022
	(Millions)
Service revenues	$	—	$	1	$	3
Product sales (1)	2,052		2,060		3,534

Net realized gain (loss) from commodity derivative instruments (1)	72		115		17
Net unrealized gain (loss) from commodity derivative instruments	(335)		702		(321)
Net gain (loss) from commodity derivatives	(263)		817		(304)

Segment revenues	1,789		2,878		3,233

Product costs (1)	(1,799)		(1,786)		(3,228)
Net unrealized gain (loss) from commodity derivative instruments within Net processing commodity expenses	(6)		(43)		47
Other segment costs and expenses	(108)		(99)		(92)
Gas & NGL Marketing Services Modified EBITDA	$	(124)	$	950	$	(40)

Commodity margins	$	325	$	389	$	323

________________

(1) Included as a component of Commodity margins.

2024 vs. 2023

Gas & NGL Marketing Services Modified EBITDA decreased primarily due to an unfavorable change in Net unrealized gain (loss) from commodity derivative instruments and lower Commodity margins.

Commodity margins decreased $64 million primarily due to:

•A $44 million decrease in Williams’ natural gas marketing margins including $35 million of lower natural gas transportation capacity marketing margins due to less favorable net realized pricing spreads. The decrease in its natural gas marketing margins also includes $9 million of lower natural gas storage marketing margins primarily driven by higher storage fees and less favorable realized derivative gains, partially offset by a favorable change of $14 million in lower cost or net realizable value inventory adjustment;

•A $20 million decrease in Williams’ NGL marketing margins including an unfavorable change in net realized gains and losses on sale of inventory in 2024 compared to 2023 driven by unfavorable changes in non-ethane prices.

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Management’s Discussion and Analysis (Continued)

The change in Net unrealized gain (loss) from commodity derivative instruments within Segment revenues and Net processing commodity expenses relates to derivative contracts that are not designated as hedges for accounting purposes. The change from 2023 is primarily due to a change in forward commodity prices relative to Williams’ hedge positions in 2024 compared to 2023.

2023 vs. 2022

Gas & NGL Marketing Services Modified EBITDA increased primarily due to a favorable change in Net unrealized gain (loss) from commodity derivative instruments within Segment revenues and higher Commodity margins, partially offset by an unfavorable change in Net unrealized gain (loss) from commodity derivative instruments within Net processing commodity expenses.

Commodity margins increased $66 million primarily due to:

•A $65 million increase from Williams’ natural gas marketing operations including $129 million of higher natural gas storage marketing margins primarily driven by a favorable change of $111 million in lower of cost or net realizable value adjustment; and the absence of a $15 million charge related to the remaining recognition of a purchase accounting inventory fair value adjustment in 2022. The increase in its natural gas marketing margins was partially offset by $64 million of lower natural gas transportation capacity marketing margins due to less favorable net realized pricing spreads;

•A $1 million increase in Williams’ NGL marketing margins including a $20 million favorable change in lower of cost or net realizable value inventory adjustments, partially offset by higher transportation and fractionation fees and an unfavorable change in net realized gains and losses on sale of inventory in 2023 compared to 2022 driven by an unfavorable change in NGL prices.

Net unrealized gain (loss) from commodity derivative instruments within Segment revenues and Net processing commodity expenses. The change from 2022 is primarily due to a change in forward commodity prices relative to Williams’ hedge positions in 2023 compared to 2022.

Other


	Year Ended December 31,

	2024		2023		2022
	(Millions)
Service revenues	$	15	$	16	$	24
Product sales (1)	420		442		706

Net realized gain (loss) from derivative instruments (1)	35		47		(104)
Net unrealized gain (loss) from derivative instruments	(26)		1		25
Net gain (loss) from commodity derivatives	9		48		(79)

Net revenues from upstream operations, corporate, and other business activities.	444		506		651

Other costs and expenses	(209)		(197)		(217)
Net gain from Energy Transfer litigation judgment	—		534		—
Proportional Modified EBITDA of equity-method investments	2		(2)		—
Modified EBITDA from upstream operations, corporate, and other business activities	$	237	$	841	$	434

Net realized product sales	$	455	$	489	$	602

________________

(1) Included as a component of Net realized product sales.

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Management’s Discussion and Analysis (Continued)

2024 vs. 2023

Modified EBITDA from upstream operations, corporate, and other business activities decreased primarily due to:

•A $34 million decrease in Net realized product sales from upstream operations primarily due to lower volumes and lower net realized commodity prices associated with Williams’ South Mansfield production in the Haynesville Shale region, and lower net realized commodity prices associated with Williams’ Wamsutter region. These decreases were partially offset by higher production volumes associated with Williams’ Wamsutter region production, including from the Crowheart Acquisition in the fourth quarter of 2024.

•A $27 million unfavorable change in Net unrealized gain (loss) from derivative instruments due to a change in forward commodity prices relative to hedge positions in 2024 compared to 2023;

•A $12 million unfavorable change in other costs and expenses primarily related to upstream operations; and

•The absence of a 2023 gain related to a favorable ruling on the final order and judgement of Williams’ complaint against Energy Transfer reflected in Net gain from Energy Transfer litigation judgment (see Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies).

2023 vs. 2022

Modified EBITDA from upstream operations, corporate, and other business activities increased primarily due to the Net gain from Energy Transfer litigation judgment, as previously discussed, partially offset by lower results from Williams’ upstream operations, which included the following:

•A $113 million decrease in Net realized product sales primarily due to lower net realized commodity prices, partially offset by higher sales associated with increased production volumes. Higher natural gas production volumes from new wells in the Haynesville Shale region and higher crude oil production volumes from new wells in the Wamsutter region were partially offset by lower natural gas and NGL production volumes in the Wamsutter region driven by the impact of severe winter weather in 2023;

•A $24 million unfavorable change in Net unrealized gain (loss) from derivative instruments due to a change in forward commodity prices relative to Williams’ hedge positions in 2023 compared to 2022; partially offset by

•An increase in Other costs and expenses associated with upstream operations primarily due to increased production volumes and expenses related to severe winter weather in 2023, partially offset by lower associated ad valorem and production taxes, which were impacted by lower commodity prices and lower natural gas and NGL production volumes in the Wamsutter region.

Other costs and expenses not associated with upstream operations decreased primarily due to the absence of an $11 million charge related to an accrual for loss contingency in the third quarter of 2022 and a $19 million favorable change associated with regulatory assets related to the effects of deferred taxes on equity funds used during construction.

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Management’s Discussion and Analysis (Continued)

Transco


	Year Ended December 31,
	2024		$ Change from 2023*	% Change from 2023*		2023
	(Millions)
Revenues:
Natural gas transportation service revenues	$	2,619	+113	+5	%	$	2,506
Natural gas storage service revenues	200		+14	+8	%	186
Natural gas product sales	118		-19	-14	%	137
Other service revenues	27		-10	-27	%	37
Total revenues	2,964					2,866

Costs and expenses:
Natural gas product costs	118		+19	+14	%	137
Operating and maintenance expenses	510		+7	+1	%	517
Selling, general, and administrative expenses	216		-1	—	%	215
Depreciation and amortization expenses	545		-26	-5	%	519
Taxes, other than income taxes	111		-6	-6	%	105

Other (income) expense – net	(35)		-3	-8	%	(38)
Total costs and expenses	1,465					1,455

Operating income (loss)	1,499		+88	+6	%	1,411

Interest expense	(324)		—	—	%	(324)
Interest income	58		-29	-33	%	87
Allowance for equity and borrowed funds used during construction (AFUDC)	88		+11	+14	%	77
Other income (expense) – net	(8)		-4	-100	%	(4)

Net income (loss)	$	1,313	+66	+5	%	$	1,247

_______

* + = Favorable change; - = Unfavorable change; NM = A percentage calculation is not meaningful due to a change in signs, a zero-value denominator, or a percentage change greater than 200.

2024 vs. 2023

Variances due to the changes in natural gas prices and transportation volumes have little impact on revenues because, under our rate design methodology, the majority of overall cost of service is recovered through firm capacity reservation charges in Transco’s transportation rates.

Transco has cash out sales, which settle gas imbalances with shippers. In the course of providing transportation services to customers, Transco may receive different quantities of gas from shippers than the quantities delivered on behalf of those shippers. Additionally, Transco transports gas on various pipeline systems, which may deliver different quantities of gas on Transco’s behalf than the quantities of gas received from Transco. These transactions

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Management’s Discussion and Analysis (Continued)

result in gas transportation and exchange imbalance receivables and payables. Transco’s tariff includes a method whereby the majority of transportation imbalances are settled on a monthly basis through cash out sales or purchases. The cash out sales have no impact on Transco’s operating income.

Revenues increased primarily due to:

•A $113 million increase in Natural gas transportation service revenues due to additional capacity from placing the Regional Energy Access Expansion into service during the fourth quarter of 2023 and in August 2024, the impact of placing the Carolina Market Link Expansion into service during the first quarter of 2024, the impact of placing partially the Southside Reliable Enhancement into service in November 2024, and an additional billing day, partially offset by lower electric power costs in 2024. Electric power costs are recovered from our customers through transportation rates and are offset in Operating and maintenance expenses resulting in no net impact on our results of operations;

•A $14 million increase in Natural gas storage service revenues primarily due to an increase in rates and an additional billing day;

•A $19 million decrease in Natural gas product sales due to lower pricing offset by higher cash-out volumes, which directly offsets in Natural gas product costs resulting in no net impact on our results of operations;

•A $10 million decrease in Other service revenues primarily due to park and loan services.

Natural gas product costs decreased, directly offsetting Natural gas product sales and resulting in no net impact on our results of operations.

Operating and maintenance expenses decreased primarily due to lower electric power costs. Electric power costs are recovered from customers through transportation rates and are offset in Natural gas transportation service revenues resulting in no net impact on results of operations; additionally there were increases in Operating and maintenance expenses costs from employee-related costs, including the impact of a change in a practice related to payroll timing, offset by a decrease in contractor services costs.

Depreciation and amortization expenses increased as a result of additional assets placed in service and an increase in ARO-related depreciation (offset in Other income (expense) – net resulting in no net impact on our results of operations).

Taxes, other than income taxes increased primarily due to an increase in property tax as a result of valuation increases in 2024.

Other (income) expense – net incurred an unfavorable change primarily driven by an unfavorable change in the amortization of the regulatory pension liabilities, partially offset by a favorable change in the materials and supplies obsolete inventory reserve and a favorable change associated with the deferral of ARO related depreciation (offset in Depreciation and amortization expenses resulting in no net impact on our results of operations).

Interest income decreased due to a decrease in affiliated interest income on our advances to Williams due to a lower note receivable balance during 2024.

Allowance for equity and borrowed funds used during construction (AFUDC) increased as a result of increased capital expenditures.

Other income (expense) – net increased resulting from various increased expenses incurred in 2024.

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Management’s Discussion and Analysis (Continued)

NWP


	Year Ended December 31,
	2024		$ Change from 2023*		% Change from 2023*		2023
	(Millions)
Revenues:
Natural gas transportation service revenues	$	416	$	+1	—	%	$	415
Natural gas storage service revenues	15		—		—	%	15
Other service revenues	13		+3		+30	%	10
Total revenues	444						440

Costs and expenses:
Operating and maintenance expenses	95		-7		-8	%	88
Selling, general, and administrative expenses	51		—		—	%	51
Depreciation and amortization expenses	111		—		—	%	111
Taxes, other than income taxes	14		-2		-17	%	12

Other (income) expense - net	(18)		+2		+13	%	(16)
Total costs and expenses	253						246

Operating income (loss)	191		-3		-2	%	194

Interest expense	(28)		—		—	%	(28)
Allowance for equity and borrowed funds used during construction (AFUDC)	10		+6		+150	%	4
Other income (expense) – net	7		-3		-30	%	10

Net income (loss)	$	180	$	—	—	%	$	180

_______

* + = Favorable change; - = Unfavorable change; NM = A percentage calculation is not meaningful due to a change in signs, a zero-value denominator, or a percentage change greater than 200.

2024 vs. 2023

Variances due to changes in natural gas prices and transportation volumes have little impact on revenues, because under our rate design methodology, the majority of overall cost of service is recovered through firm capacity reservation charges in our transportation rates.

Revenues increased primarily due to:

•A $1 million increase in Natural gas transportation service revenues primarily due to an additional billing day in the leap year;

•A $3 million increase in Other service revenues from higher park and loan services.

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Management’s Discussion and Analysis (Continued)

Operating and maintenance expenses increased due to higher labor costs, electricity expenses, and higher contract services related to pipeline maintenance inspection activities.

Allowance for equity and borrowed funds used during construction (AFUDC) increased due to increased capital expenditures in 2024.

Other income (expense) – net decreased due to lower interest income earned on NWP’s advances to affiliates, which had a reduced balance in 2024.

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Management’s Discussion and Analysis (Continued)

Management’s Discussion and Analysis of Financial Condition and Liquidity

Overview

Williams

During 2024, investing and financing expenditures included $2.6 billion of capital expenditures, $2.2 billion of acquisitions including Gulf Coast Storage, Discovery, and Crowheart, and $2.3 billion of dividends paid to common shareholders. These expenditures were funded primarily by $4.974 billion of cash provided by operating activities. Williams ended the year with $60 million of Cash and cash equivalents. See also the following section titled Sources (Uses) of Cash.

Transco and NWP

Transco and NWP fund their capital requirements with cash flows from operating activities, equity contributions and advances from Williams, accessing capital markets, and, if required, borrowings under the credit facility (see Note 13 – Debt and Banking Arrangements).

Transco and NWP may raise capital through private debt offerings, as well as offerings registered pursuant to offering-specific registration statements. Interest rates, market conditions, and industry conditions will affect amounts raised, if any, in the capital markets. Transco and NWP anticipate that they will be able to access public and private debt markets on terms commensurate with their credit ratings to finance their capital requirements, when needed.

Transco and NWP are also participants in Williams’ cash management program, and both make advances to and receive advances from Williams. At December 31, 2024, Transco’s advances to Williams totaled approximately $638 million and NWP’s advances from Williams totaled approximately $26 million. These advances are represented by demand notes. See Note 4 – Related Party Transactions.

Outlook

Williams

Growth capital and investment expenditures in 2025 are expected to range from $1.65 billion to $1.95 billion, excluding acquisitions. Growth capital spending in 2025 primarily includes projects supporting growth in the Haynesville Shale basin (including Louisiana Energy Gateway expansion project), Transco expansions, all of which are fully contracted with firm transportation agreements and projects supporting the Northeast G&P business. Williams also expects to invest capital in the development of its upstream oil and gas properties. In addition to growth capital and investment expenditures, Williams also remains committed to projects that maintain its assets for safe and reliable operations, as well as projects that reduce emissions, and meet legal, regulatory, and/or contractual commitments. Williams intends to fund substantially all planned 2025 capital spending with cash available after paying dividends. Williams retains the flexibility to adjust planned levels of growth capital and investment expenditures in response to changes in economic conditions or business opportunities including the repurchase of its common stock.

On January 9, 2025, Williams issued $1.5 billion of long-term debt and on January 15, 2025, Williams retired $750 million of long term debt (see Note 13 – Debt and Banking Arrangements).

As of December 31, 2024, Williams has approximately $1.7 billion of long-term debt due within one year. Williams’ potential sources of liquidity available to address these maturities include cash on hand, proceeds from refinancing, the credit facility, or the commercial paper program, as well as proceeds from asset monetizations.

Transco and NWP

Transco and NWP categorize their capital expenditures as either maintenance capital expenditures or growth capital expenditures. Maintenance capital expenditures are those expenditures required to maintain the existing

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Management’s Discussion and Analysis (Continued)

operating capacity and service capability of their assets, including replacement of system components and equipment that are worn, obsolete, completing their useful life, or necessary to remain in compliance with environmental laws and regulations. Growth capital expenditures improve the service capability of existing assets, extend useful lives, increase transmission or storage capacities from existing levels, reduce costs or enhance revenues. Transco and NWP anticipate 2025 growth capital expenditures will be approximately $336 million and $43 million, respectively, primarily for expansion projects, and $423 million and $186 million, respectively, for maintenance projects. They expect to fund these capital expenditures with cash from operations.

Liquidity

Williams expects to have sufficient liquidity to manage its businesses in 2025 based on forecasted levels of cash flow from operations and other sources of liquidity. Williams’ potential material internal and external sources and uses of liquidity are as follows:


Sources:
			Cash and cash equivalents on hand
			Cash generated from operations
			Distributions from equity-method investees
			Utilization of the credit facility and/or commercial paper program
			Cash proceeds from issuance of debt and/or equity securities
			Proceeds from asset monetizations
Uses:
			Working capital requirements
			Capital and investment expenditures
			Product costs
			Gas & NGL Marketing Services payments for transportation and storage capacity and gas supply
			Other operating costs including human capital expenses
			Quarterly dividends to shareholders
			Repayments of borrowings under the credit facility and/or commercial paper program
			Debt service payments, including payments of long-term debt
			Distributions to noncontrolling interests
			Share repurchase program

As of December 31, 2024, Williams has approximately $24.7 billion of long-term debt due after one year. Potential sources of liquidity available to address these maturities include cash generated from operations, proceeds from refinancing, the credit facility, or the commercial paper program, as well as proceeds from asset monetizations.

Potential risks associated with Williams’ planned levels of liquidity discussed above include those previously discussed in Company Outlook.

As of December 31, 2024, Williams had a working capital deficit of $2.651 billion, including cash and cash equivalents and long-term debt due within one year. Williams available liquidity is as follows:


	December 31, 2024
	(Millions)
Cash and cash equivalents	$	60
Capacity available under Williams’ $3.75 billion credit facility, less amounts outstanding under Williams’ $3.5 billion commercial paper program (1)	3,295
	$	3,355

__________

(1)In managing its available liquidity, Williams does not expect a maximum outstanding amount in excess of the capacity of its credit facility inclusive of any outstanding amounts under its commercial paper program. Williams had $455 million of Commercial paper (at par value) outstanding as of December 31, 2024. Through

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Management’s Discussion and Analysis (Continued)

December 31, 2024, the highest amount outstanding under the commercial paper program and credit facility during 2024 was $730 million. Williams expects to be in compliance with the financial covenants associated with the credit facility for the December 31, 2024, reporting period.

Dividends

Williams increased the regular quarterly cash dividend to common stockholders by approximately 6.1 percent from the $0.4475 per share paid in each quarter of 2023, to $0.4750 per share paid in each quarter of 2024. On January 28, 2025, Williams’ board of directors approved a regular quarterly dividend of $0.5000 per share payable on March 31, 2025.

Registrations

In February 2024, Williams filed a shelf registration statement as a well-known seasoned issuer.

Distributions from Equity-Method Investees

The organizational documents of entities in which Williams has an equity-method investment generally require periodic distributions of their available cash to their members. In each case, available cash is reduced, in part, by reserves appropriate for operating their respective businesses. See Note 8 – Investing Activities for our more significant equity-method investees.

Credit Ratings

The interest rates at which Williams is able to borrow money are impacted by its credit ratings, which are currently as follows:

Rating Agency

Outlook

Senior Unsecured
Debt Rating

S&P Global Ratings

Positive

BBB

Moody’s Investors Service

Stable

Baa2

Fitch Ratings

Positive

BBB

In January 2025, Fitch Ratings changed its Outlook from Stable to Positive.

These credit ratings are included for informational purposes and are not recommendations to buy, sell, or hold Williams securities, and each rating should be evaluated independently of any other rating. No assurance can be given that the credit rating agencies will continue to assign Williams investment-grade ratings even if it meets or exceeds their current criteria for investment-grade ratios. A downgrade of its credit ratings might increase Williams’ future cost of borrowing and, if ratings were to fall below investment-grade, could require it to provide additional collateral to third parties, negatively impacting Williams’ available liquidity.

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Management’s Discussion and Analysis (Continued)

Sources (Uses) of Cash

The following table summarizes the sources (uses) of cash and cash equivalents for each of the periods presented in the Williams Consolidated Statement of Cash Flows:


	Cash Flow	Year Ended December 31,
	Category	2024		2023		2022
		(Millions)
Sources of cash and cash equivalents:
Net cash provided (used) by operating activities	Operating	$	4,974	$	5,938	$	4,889
Proceeds from long-term debt (Note 13)	Financing	3,594		2,755		1,755

Proceeds from sale of business (Note 3)	Investing	—		346		—

Proceeds from dispositions of equity-method investments (Note 3)	Investing	161		—		—
Proceeds from commercial paper – net	Financing	—		372		345

Uses of cash and cash equivalents:
Payments of long-term debt	Financing	(2,946)		(634)		(2,876)
Purchases of businesses, net of cash acquired (Note 3)	Investing	(2,244)		(1,568)		(933)
Common dividends paid	Financing	(2,316)		(2,179)		(2,071)
Capital expenditures	Investing	(2,573)		(2,516)		(2,253)

Dividends and distributions paid to noncontrolling interests	Financing	(242)		(213)		(204)
Payments of commercial paper – net	Financing	(269)		—		—
Purchases of and contributions to equity-method investments	Investing	(114)		(141)		(166)
Purchases of treasury stock	Financing	—		(130)		(9)

Other sources / (uses) – net	Financing and Investing	(115)		(32)		(5)
Increase (decrease) in cash and cash equivalents		$	(2,090)	$	1,998	$	(1,528)

Operating activities

The factors that determine Williams’ operating activities are largely the same as those that affect Net income (loss), with the exception of noncash items such as Depreciation and amortization, Provision (benefit) for deferred income taxes, Equity (earnings) losses, Net unrealized (gain) loss from commodity derivative instruments, Gain on sale of business, Gain on disposition of equity-method investments, Gain on remeasurement of equity-method investments , Inventory write-downs, and Amortization of stock-based awards.

Williams’ Net cash provided (used) by operating activities for the year ended December 31, 2024, decreased from the same period in 2023 primarily due to unfavorable changes in margin requirements, lower operating income (excluding non-cash items previously discussed), and unfavorable changes in net operating working capital.

Williams’ Net cash provided (used) by operating activities in 2023 increased from 2022 primarily due to higher operating income (excluding noncash items as previously discussed), as well as favorable changes in net operating working capital and margin requirements, partially offset by lower Distributions from equity-method investees.

Environmental

Williams is a participant in certain environmental activities in various stages including assessment studies, cleanup operations, and/or remedial processes at certain sites, some of which it currently does not own (see Note 18 – Contingencies and Commitments). Williams is monitoring these sites in a coordinated effort with other potentially responsible parties, the EPA, or other governmental authorities. Williams is jointly and severally liable along with unrelated third parties in some of these activities and solely responsible in others. Current estimates of the most likely costs of such activities are approximately $42 million, all of which are included in Other current liabilities

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Management’s Discussion and Analysis (Continued)

and Regulatory liabilities, deferred income, and other at December 31, 2024. Williams will seek to recover approximately $3 million of accrued costs related to remediation activities by its interstate gas pipelines through future natural gas transmission rates. The remainder of these costs will be funded from operations. During 2024, Williams paid approximately $11 million for cleanup and/or remediation and monitoring activities. Williams expects to pay approximately $5 million in 2025 for these activities. Estimates of the most likely costs of cleanup are generally based on completed assessment studies, preliminary results of studies, or Williams’ experience with other similar cleanup operations. At December 31, 2024, certain assessment studies were still in process for which the ultimate outcome may yield different estimates of most likely costs. Therefore, the actual costs incurred will depend on the final amount, type, and extent of contamination discovered at these sites, the final cleanup standards mandated by the EPA or other governmental authorities, and other factors.

The EPA and various state regulatory agencies routinely propose and promulgate new rules and issue updated guidance to existing rules. These rulemakings include, but are not limited to, rules for reciprocating internal combustion engine and combustion turbine maximum achievable control technology, reviews and updates to the National Ambient Air Quality Standards, and rules for new and existing source performance standards for volatile organic compounds and methane. Williams continuously monitors these regulatory changes and how they may impact its operations. Implementation of new or modified regulations may result in impacts to Williams’ operations and increase the cost of additions to Property, plant, and equipment – net for both new and existing facilities in affected areas; however, due to regulatory uncertainty on final rule content and applicability timeframes, Williams is unable to reasonably estimate the cost these regulatory impacts at this time.

Williams considers prudently incurred environmental assessment and remediation costs and the costs associated with compliance with environmental standards to be recoverable through rates for its interstate natural gas transmission pipelines. Historically, with limited exceptions, Williams has been permitted recovery of these environmental costs, and the intent is to continue seeking recovery of such costs through future rate filings.

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Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Interest Rate Risk

Williams

Williams’ current interest rate risk exposure, inclusive of subsidiaries, is related primarily to its debt portfolio. The debt portfolio is primarily comprised of fixed rate debt, which mitigates the impact of fluctuations in interest rates. Any borrowings under the credit facility and any issuances under Williams’ commercial paper program could be at a variable interest rate and could expose it to the risk of increasing interest rates. The maturity of Williams’ long-term debt portfolio is partially influenced by the expected lives of its operating assets. Williams may utilize interest rate derivative instruments to hedge interest rate risk associated with future debt issuances (see Note 13 – Debt and Banking Arrangements).

The tables below provide information by maturity date about the interest rate risk-sensitive instruments as of December 31, 2024 and 2023. The tables exclude unamortized debt issuance costs and net unamortized debt premium (discount) as disclosed in Note 13 – Debt and Banking Arrangements. See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk for the methods used in determining the fair value of Williams’ long-term debt.


		2025			2026			2027			2028			2029			Thereafter			Total		Fair Value December 31, 2024
	(Millions)
Long-term debt, including current portion:
Fixed rate		$	1,720		$	2,345		$	1,994		$	1,445		$	1,600		$	17,618		$	26,722	$	25,830
Weighted-average interest rate		5.1		%	5.1		%	5.0		%	5.1		%	5.1		%	5.2		%
Commercial paper (1)		$	455		$	—		$	—		$	—		$	—		$	—		$	455	$	455

		2024			2025			2026			2027			2028			Thereafter			Total		Fair Value December 31, 2023
	(Millions)
Long-term debt, including current portion:
Fixed rate		$	2,338		$	2,263		$	2,345		$	1,993		$	1,445		$	15,583		$	25,967	$	25,553
Weighted-average interest rate		4.9		%	5.0		%	5.1		%	5.0		%	5.1		%	5.1		%


Commercial paper (1)		$	725		$	—		$	—		$	—		$	—		$	—		$	725	$	725

__________________

(1) The weighted-average interest rate for commercial paper as of December 31, 2024 and 2023 was 4.6 percent and 5.6 percent, respectively.

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Transco

At December 31, 2024 and 2023, Transco’s debt portfolio included only fixed rate debt, which mitigates the impact of fluctuations in interest rates. Any borrowings under the credit facility would be at a variable interest rate and would expose it to the risk of increasing interest rates. The following tables provide Transco’s information by maturity date about the interest rate risk-sensitive instruments, as of December 31, 2024 and 2023. The tables exclude unamortized debt issuance costs and net unamortized debt premium (discount) as disclosed in Note 13 – Debt and Banking Arrangements. See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk for the methods used in determining the fair value of Transco’s long-term debt.


		2025			2026			2027			2028			2029			Thereafter			Total		Fair Value December 31, 2024
	(Millions)
Long-term debt, excluding other financing obligation:
Fixed rate		$	—		$	1,208		$	—		$	400		$	—		$	2,575		$	4,183	$	3,858
Weighted-average interest rate		5.2		%	4.8		%	4.2		%	4.2		%	4.2		%	4.5		%

Other financing obligations, including current portion:
Fixed rate		$	35		$	37		$	41		$	45		$	50		$	878		$	1,086	$	1,418
Weighted-average interest rate		9.2		%	9.2		%	9.2		%	9.2		%	9.2		%	9.3		%

		2024			2025			2026			2027			2028			Thereafter			Total		Fair Value December 31, 2023
	(Millions)
Long-term debt, excluding other financing obligation:
Fixed rate		$	—		$	—		$	1,208		$	—		$	400		$	2,575		$	4,183	$	3,948
Weighted-average interest rate		5.2		%	5.2		%	4.4		%	4.2		%	4.2		%	4.4		%

Other financing obligations, including current portion:
Fixed rate		$	32		$	35		$	37		$	41		$	45		$	926		$	1,116	$	1,490
Weighted-average interest rate		9.2		%	9.2		%	9.2		%	9.2		%	9.2		%	9.3		%

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NWP

At December 31, 2024 and 2023, NWP’s debt portfolio included only fixed rate debt, which mitigates the impact of fluctuations in interest rates. Any borrowings under the credit facility would be at a variable interest rate and would expose it to the risk of increasing interest rates. The following tables provide NWP’s information by maturity date about the interest rate risk-sensitive instruments, as of December 31, 2024 and 2023. The tables exclude unamortized debt issuance costs and net unamortized debt premium (discount) as disclosed in Note 13 – Debt and Banking Arrangements. See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk for the methods used in determining the fair value of NWP’s long-term debt.


		2025			2026			2027			2028			2029			Thereafter			Total		Fair Value December 31, 2024
	(Millions)
Long-term debt, including current portion:
Fixed rate		$	85		$	—		$	500		$	—		$	—		$	—		$	585	$	573
Weighted-average interest rate		4.2		%	4.0		%	—		%	—		%	—		%	—		%

		2024			2025			2026			2027			2028			Thereafter			Total		Fair Value December 31, 2023
	(Millions)
Long-term debt:
Fixed rate		$	—		$	85		$	—		$	500		$	—		$	—		$	585	$	581
Weighted-average interest rate		4.5		%	4.2		%	4.0		%	—		%	—		%	—		%

Commodity Price Risk

Williams is exposed to commodity price risk through its natural gas and NGL marketing activities, including contracts to purchase, sell, transport, and store product. Williams routinely manages this risk with a variety of exchange-traded and OTC energy contracts such as forward contracts, futures contracts, and basis swaps, as well as physical transactions. Although many of the contracts used to manage commodity exposure are derivative instruments, these economic hedges are not designated or do not qualify for hedge accounting treatment.

Williams is also exposed to commodity prices through the upstream business and certain gathering and processing contracts. Williams uses derivative instruments to lock in forward sales prices on a portion of expected future production and to lock in NGL margin on a portion of commodity-exposed gathering and processing volumes. These economic hedges are not designated for hedge accounting treatment.

The fair value measurements and maturities of Williams’ commodity derivative assets (liabilities) at December 31, 2024 and 2023, were as follows:


	Total Fair Value		Maturity
Fair Value Measurements Level (1)			2025		2026 - 2027		2028 - 2029+
	(Millions)
Level 1 (2)	$	(105)	$	(41)	$	(56)	$	(8)
Level 2	(287)		(97)		(112)		(78)
Level 3	48		11		8		29
Fair value of contracts outstanding at December 31, 2024	$	(344)	$	(127)	$	(160)	$	(57)

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	Total Fair Value		Maturity
Fair Value Measurements Level (1)			2024		2025 - 2026		2027 - 2028+
	(Millions)
Level 1 (3)	$	138	$	110	$	33	$	(5)
Level 2	(166)		14		(71)		(109)
Level 3	53		2		16		35
Fair value of contracts outstanding at December 31, 2023	$	25	$	126	$	(22)	$	(79)

_______________

(1)See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk for discussion of valuation techniques by level within the fair value hierarchy. See Note 17 – Commodity Derivatives for the amount of change in fair value recognized in Williams’ Consolidated Statement of Income.

(2)Commodity derivative assets and liabilities exclude $288 million of net cash collateral in Level 1.

(3)Commodity derivative assets and liabilities exclude $2 million of net cash collateral in Level 1.

Value at Risk (VaR)

VaR is the maximum predicted loss in portfolio value over a specified time period that is not expected to be exceeded within a given degree of probability. Williams’ VaR may not be comparable to that of other companies due to differences in the factors used to calculate VaR. Williams’ VaR is determined using parametric models with 95 percent confidence intervals and one-day holding periods, which means that 95 percent of the time, the risk of loss in a day from a portfolio of positions is expected to be less than or equal to the amount of VaR calculated. Williams’ open exposure is managed in accordance with established policies that limit market risk and require daily reporting of predicted financial loss to management. Because Williams generally manages physical gas assets and economically protects its positions by hedging in the futures markets, its open exposure is generally mitigated. Williams employs daily risk testing, using both VaR and stress testing, to evaluate the risk of its positions.

Williams actively monitors open commodity marketing positions and the resulting VaR and maintain a relatively small risk exposure as total buy volume is close to sell volume, with minimal open natural gas price risk.

The VaR associated with Williams’ integrated natural gas trading operations was $4 million at December 31, 2024 and $9 million at December 31, 2023. Williams had the following VaRs for the period shown:


	Year Ended December 31, 2024		Year Ended December 31, 2023

	(Millions)
Average	$	3	$	6
High	$	15	$	13
Low	$	1	$	4

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Williams’ non-trading portfolio primarily consists of commodity derivatives that hedge Williams’ upstream business and certain gathering and processing contracts. The VaR associated with these commodity derivatives was $8 million at December 31, 2024 and $3 million at December 31, 2023. Williams had the following VaRs for the period shown:


	Year Ended December 31, 2024		Year Ended December 31, 2023

	(Millions)
Average	$	5	$	4
High	$	8	$	8
Low	$	3	$	2

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Item 8. Financial Statements and Supplementary Data


			Page
Williams:
Report of Independent Registered Public Accounting Firm			94
Consolidated Statements of Income for the Years Ended December 31, 2024, 2023, and 2022			96
Consolidated Statements of Comprehensive Income (Loss) for the Years Ended December 31, 2024, 2023, and 2022			97
Consolidated Balance Sheets at December 31, 2024 and 2023			98
Consolidated Statements of Changes in Equity for the Years Ended December 31, 2024, 2023, and 2022			99
Consolidated Statements of Cash Flows for the Years Ended December 31, 2024, 2023, and 202 2			100
Transco:
Report of Independent Registered Public Accounting Firm			101
Statements of Net Income for the Years Ended December 31, 2024, 2023, and 2022			103
Balance Sheets at December 31, 2024 and 2023			104
Statements of Changes in Member’s Equity for the Years Ended December 31, 2024, 2023, and 2022			105
Statements of Cash Flows for the Years Ended December 31, 2024, 2023, and 2022			106
NWP:
Report of Independent Registered Public Accounting Firm			107
Statements of Net Income for the Years Ended December 31, 2024, 2023, and 2022			109
Balance Sheets at December 31, 2024 and 2023			110
Statements of Changes in Member’s Equity for the Years Ended December 31, 2024, 2023, and 2022			111
Statements of Cash Flows for the Years Ended December 31, 2024, 2023, and 2022			112

Combined Notes to Financial Statements			113
Schedule II — Valuation and Qualifying Accounts			192

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of

The Williams Companies, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheet of The Williams Companies, Inc. (the Company) as of December 31, 2024 and 2023, the related consolidated statements of income, comprehensive income (loss), changes in equity, and cash flows for each of the three years in the period ended December 31, 2024, and the related notes and financial statement schedule listed in the Index at Item 15(a) (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the consolidated financial position of the Company at December 31, 2024 and 2023, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 25, 2025 expressed an unqualified opinion thereon.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s consolidated financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

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Critical Audit Matters

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the account or disclosures to which it relates.

Pension Benefits Obligation

Description of the Matter

At December 31, 2024, the Company’s aggregate pension benefits obligation was $937 million and was exceeded by the fair value of pension plan assets of $1,183 million, resulting in an overfunded pension benefits obligation of $246 million. As explained in Note 7 to the consolidated financial statements, the Company utilized key assumptions to determine the pension benefits obligation.

Auditing the pension benefits obligation is complex and required the involvement of specialists due to the nature of the actuarial assumptions (e.g., discount rates and cash balance interest crediting rate) used in the measurement process. These assumptions have a significant effect on the projected benefit obligation.

How We Addressed the Matter in Our Audit

We obtained an understanding, evaluated the design, and tested the operating effectiveness of controls relating to the measurement and valuation of the pension benefits obligation, including controls over management’s review of the pension benefits obligation, the significant actuarial assumptions and the data inputs.

To test the pension benefits obligation, our audit procedures included, among others, evaluating the methodologies used, the significant actuarial assumptions discussed above, and the underlying data used by the Company. We compared the actuarial assumptions used by management to historical trends and evaluated the changes in the funded status from prior year. In addition, we involved our actuarial specialists to assist with our procedures. For example, we evaluated management’s methodology for determining the discount rates that reflect the maturity and duration of the benefit payments and are used to measure the pension benefits obligation. As part of this assessment, we independently developed a range of yield curves, we compared the projected cash flows to prior year, and compared the current year benefits paid to the prior year projected cash flows. To test the cash balance interest crediting rate, we independently calculated a range of rates and compared them to the rate used by management. We also tested the completeness and accuracy of the underlying data, including the participant data.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 1962.

Tulsa, Oklahoma

February 25, 2025

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The Williams Companies, Inc.

Consolidated Statement of Income


	Year Ended December 31,

	2024		2023		2022
	(Millions, except per-share amounts)
Revenues:
Service revenues	$	7,628	$	7,026	$	6,536
Service revenues – commodity consideration	134		146		260
Product sales	2,991		2,779		4,556
Net gain (loss) from commodity derivatives	(250)		956		(387)
Total revenues	10,503		10,907		10,965
Costs and expenses:
Product costs	2,075		1,884		3,369
Net processing commodity expenses	43		151		88
Operating and maintenance expenses	2,179		1,984		1,817
Depreciation and amortization expenses	2,219		2,071		2,009
Selling, general, and administrative expenses	708		665		636



Gain on sale of business (Note 3)	—		(129)		—
Other (income) expense – net	(60)		(30)		28
Total costs and expenses	7,164		6,596		7,947
Operating income (loss)	3,339		4,311		3,018
Equity earnings (losses)	560		589		637


Other investing income (loss) – net	343		108		16
Interest expense	(1,364)		(1,236)		(1,147)


Net gain from Energy Transfer litigation judgment (Note 1)	—		534		—
Other income (expense) – net	108		99		18
Income (loss) before income taxes	2,986		4,405		2,542
Less: Provision (benefit) for income taxes	640		1,005		425
Income (loss) from continuing operations	2,346		3,400		2,117
Income (loss) from discontinued operations (Note 1)	—		(97)		—
Net income (loss)	2,346		3,303		2,117
Less: Net income (loss) attributable to noncontrolling interests	121		124		68
Net income (loss) attributable to The Williams Companies, Inc.	2,225		3,179		2,049
Less: Preferred stock dividends	3		3		3
Net income (loss) available to common stockholders	$	2,222	$	3,176	$	2,046
Amounts attributable to The Williams Companies, Inc. available to common stockholders:
Income (loss) from continuing operations	$	2,222	$	3,273	$	2,046
Income (loss) from discontinued operations (Note 1)	—		(97)		—
Net income (loss) available to common stockholders	$	2,222	$	3,176	$	2,046
Basic earnings (loss) per common share:
Income (loss) from continuing operations	$	1.82	$	2.69	$	1.68
Income (loss) from discontinued operations	—		(.08)		—
Net income (loss) available to common stockholders	$	1.82	$	2.61	$	1.68
Weighted-average shares (thousands)	1,219,184		1,217,784		1,218,362
Diluted earnings (loss) per common share:
Income (loss) from continuing operations	$	1.82	$	2.68	$	1.67
Income (loss) from discontinued operations	—		(.08)		—
Net income (loss) available to common stockholders	$	1.82	$	2.60	$	1.67
Weighted-average shares (thousands)	1,222,954		1,222,715		1,222,672

See the Combined Notes to Financial Statements.

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The Williams Companies, Inc.

Consolidated Statement of Comprehensive Income (Loss)


	Year Ended December 31,

	2024		2023		2022
	(Millions)
Net income (loss)	$	2,346	$	3,303	$	2,117
Other comprehensive income (loss):
Designated interest rate cash flow hedging activities:

Net unrealized gain (loss) from derivative instruments, net of taxes of $(2), $(8), and $1 in 2024, 2023, and 2022, respectively	6		26		(3)

Reclassifications into earnings of net derivative instruments (gain) loss, net of taxes of $1, $1 and $— in 2024, 2023, and 2022, respectively	(2)		(2)		—



Pension and other postretirement benefits:


Net actuarial gain (loss) arising during the year, net of taxes of $(24), $—, and $1 in 2024, 2023, and 2022, respectively	72		(2)		1
Amortization of actuarial (gain) loss and net actuarial loss from settlements included in net periodic benefit cost (credit), net of taxes of $1, $—, and $(4) in 2024, 2023, and 2022, respectively	—		3		11





Other comprehensive income (loss)	76		25		9
Comprehensive income (loss)	2,422		3,328		2,126
Less: Comprehensive income (loss) attributable to noncontrolling interests	121		124		68
Comprehensive income (loss) attributable to The Williams Companies, Inc.	$	2,301	$	3,204	$	2,058

See the Combined Notes to Financial Statements.

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The Williams Companies, Inc.

Consolidated Balance Sheet


	December 31,

	2024		2023
	(Millions, except per-share amounts)
ASSETS
Current assets:
Cash and cash equivalents	$	60	$	2,150
Trade accounts and other receivables (net of allowance of ($1) at December 31, 2024 and ($3) at December 31, 2023)	1,863		1,655
Inventories	279		274
Derivative assets	267		239
Other current assets and deferred charges	192		195
Total current assets	2,661		4,513

Investments	4,140		4,637
Property, plant, and equipment – net	38,692		34,311
Intangible assets – net of accumulated amortization	7,209		7,593
Regulatory assets, deferred charges, and other	1,830		1,573
Total assets	$	54,532	$	52,627

LIABILITIES AND EQUITY
Current liabilities:
Accounts payable	$	1,613	$	1,379
Derivative liabilities	164		105
Other current liabilities	1,360		1,284
Commercial paper	455		725
Long-term debt due within one year	1,720		2,337
Total current liabilities	5,312		5,830

Long-term debt	24,736		23,376
Deferred income tax liabilities	4,376		3,846
Regulatory liabilities, deferred income, and other	5,268		4,684
Contingent liabilities and commitments (Note 18)

Equity:
Stockholders’ equity:
Preferred stock ($1 par value; 30 million shares authorized at December 31, 2024 and December 31, 2023; 35 thousand shares issued at December 31, 2024 and December 31, 2023)	35		35
Common stock ($1 par value; 1,470 million shares authorized at December 31, 2024 and December 31, 2023; 1,258 million shares issued at December 31, 2024 and 1,256 million shares issued at December 31, 2023)	1,258		1,256
Capital in excess of par value	24,643		24,578
Retained deficit	(12,396)		(12,287)
Accumulated other comprehensive income (loss)	76		—
Treasury stock, at cost (39 million shares at December 31, 2024 and December 31, 2023 of common stock)	(1,180)		(1,180)
Total stockholders’ equity	12,436		12,402
Noncontrolling interests in consolidated subsidiaries	2,404		2,489
Total equity	14,840		14,891
Total liabilities and equity	$	54,532	$	52,627

See the Combined Notes to Financial Statements.

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The Williams Companies, Inc.

Consolidated Statement of Changes in Equity


	The Williams Companies, Inc. Stockholders
	Preferred Stock		Common Stock		Capital in Excess of Par Value		Retained Deficit		AOCI*		Treasury Stock		Total Stockholders’ Equity		Noncontrolling Interests		Total Equity
	(Millions)
Balance at December 31, 2021	$	35	$	1,250	$	24,449	$	(13,237)	$	(33)	$	(1,041)	$	11,423	$	2,678	$	14,101
Net income (loss)	—		—		—		2,049		—		—		2,049		68		2,117
Other comprehensive income (loss)	—		—		—		—		9		—		9		—		9


Cash dividends – common stock ($1.70 per share)	—		—		—		(2,071)		—		—		(2,071)		—		(2,071)
Stock-based compensation and related common stock issuances, net of tax	—		3		93		—		—		—		96		—		96
Dividends and distributions to noncontrolling interests	—		—		—		—		—		—		—		(204)		(204)


Contributions from noncontrolling interests	—		—		—		—		—		—		—		18		18

Purchases of treasury stock	—		—		—		—		—		(9)		(9)		—		(9)
Other	—		—		—		(12)		—		—		(12)		—		(12)
Net increase (decrease) in equity	—		3		93		(34)		9		(9)		62		(118)		(56)


Balance at December 31, 2022	$	35	$	1,253	$	24,542	$	(13,271)	$	(24)	$	(1,050)	$	11,485	$	2,560	$	14,045
Net income (loss)	—		—		—		3,179		—		—		3,179		124		3,303
Other comprehensive income (loss)	—		—		—		—		25		—		25		—		25
Cash dividends – common stock ($1.79 per share)	—		—		—		(2,179)		—		—		(2,179)		—		(2,179)
Stock-based compensation and related common stock issuances, net of tax	—		3		35		—		—		—		38		—		38
Dividends and distributions to noncontrolling interests	—		—		—		—		—		—		—		(213)		(213)

Contributions from noncontrolling interests	—		—		—		—		—		—		—		18		18
Purchases of treasury stock	—		—		—		—		—		(130)		(130)		—		(130)
Other	—		—		1		(16)		(1)		—		(16)		—		(16)
Net increase (decrease) in equity	—		3		36		984		24		(130)		917		(71)		846
Balance at December 31, 2023	$	35	$	1,256	$	24,578	$	(12,287)	$	—	$	(1,180)	$	12,402	$	2,489	$	14,891
Net income (loss)	—		—		—		2,225		—		—		2,225		121		2,346
Other comprehensive income (loss)	—		—		—		—		76		—		76		—		76
Cash dividends – common stock ($1.90 per share)	—		—		—		(2,316)		—		—		(2,316)		—		(2,316)
Stock-based compensation and related common stock issuances, net of tax	—		2		65		—		—		—		67		—		67
Dividends and distributions to noncontrolling interests	—		—		—		—		—		—		—		(242)		(242)


Contributions from noncontrolling interests	—		—		—		—		—		—		—		36		36


Other	—		—		—		(18)		—		—		(18)		—		(18)
Net increase (decrease) in equity	—		2		65		(109)		76		—		34		(85)		(51)
Balance at December 31, 2024	$	35	$	1,258	$	24,643	$	(12,396)	$	76	$	(1,180)	$	12,436	$	2,404	$	14,840

*Accumulated Other Comprehensive Income (Loss)

See the Combined Notes to Financial Statements.

Table of Contents

The Williams Companies, Inc.

Consolidated Statement of Cash Flows


	Year Ended December 31,
	2024		2023		2022
	(Millions)
OPERATING ACTIVITIES:
Net income (loss)	$	2,346	$	3,303	$	2,117
Adjustments to reconcile to net cash provided (used) by operating activities:
Depreciation and amortization	2,219		2,071		2,009
Provision (benefit) for deferred income taxes	506		951		431
Equity (earnings) losses	(560)		(589)		(637)
Distributions from equity-method investees (Note 8)	789		796		865



Net unrealized (gain) loss from commodity derivative instruments	367		(660)		249
Gain on sale of business (Note 3)	—		(129)		—
Gain on disposition of equity-method investments (Note 8)	(149)		—		—
Gain on remeasurement of equity-method investments (Note 3)	(127)		(30)		—
Inventory write-downs	10		30		161
Amortization of stock-based awards	99		77		73
Cash provided (used) by changes in current assets and liabilities:
Accounts receivable	(169)		1,089		(733)
Inventories	(9)		13		(110)
Other current assets and deferred charges	9		60		(33)
Accounts payable	139		(1,009)		410
Other current liabilities	35		(19)		209
Changes in current and noncurrent commodity derivative assets and liabilities	(286)		200		94
Other, including changes in noncurrent assets and liabilities	(245)		(216)		(216)
Net cash provided (used) by operating activities	4,974		5,938		4,889
FINANCING ACTIVITIES:
Proceeds from (payments of) commercial paper – net	(269)		372		345
Proceeds from long-term debt	3,594		2,755		1,755
Payments of long-term debt	(2,946)		(634)		(2,876)
Payments for debt issuance costs	(32)		(23)		(17)
Proceeds from issuance of common stock	10		6		54
Purchases of treasury stock	—		(130)		(9)
Common dividends paid	(2,316)		(2,179)		(2,071)
Dividends and distributions paid to noncontrolling interests	(242)		(213)		(204)
Contributions from noncontrolling interests	36		18		18
Other – net	(36)		(21)		(37)
Net cash provided (used) by financing activities	(2,201)		(49)		(3,042)
INVESTING ACTIVITIES:
Property, plant, and equipment:
Capital expenditures (1)	(2,573)		(2,516)		(2,253)
Dispositions – net	(105)		(51)		(30)

Proceeds from sale of business (Note 3)	—		346		—
Purchases of businesses, net of cash acquired (Note 3)	(2,244)		(1,568)		(933)
Proceeds from dispositions of equity-method investments (Note 8)	161		—		—
Purchases of and contributions to equity-method investments (Note 8)	(114)		(141)		(166)
Other – net	12		39		7
Net cash provided (used) by investing activities	(4,863)		(3,891)		(3,375)
Increase (decrease) in cash and cash equivalents	(2,090)		1,998		(1,528)
Cash and cash equivalents at beginning of year	2,150		152		1,680
Cash and cash equivalents at end of year	$	60	$	2,150	$	152
_________
(1) Increases to property, plant, and equipment	$	(2,581)	$	(2,564)	$	(2,394)
Changes in related accounts payable and accrued liabilities	8		48		141
Capital expenditures	$	(2,573)	$	(2,516)	$	(2,253)

See the Combined Notes to Financial Statements.

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Report of Independent Registered Public Accounting Firm

To the Management Committee and Member of Transcontinental Gas Pipe Line Company, LLC

Opinion on the Financial Statements

We have audited the accompanying balance sheets of Transcontinental Gas Pipe Line Company, LLC (the Company) as of December 31, 2024 and 2023, the related statements of net income, changes in member’s equity and cash flows for each of the three years in the period ended December 31, 2024, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

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Description of the Matter									Regulatory Assets and Liabilities As discussed in Note 1 to the financial statements, the Company is an interstate natural gas transmission company that is regulated by the Federal Energy Regulatory Commission (“FERC”) and applies accounting principles in Topic 980 for regulated operations. As such, certain incurred costs that would otherwise be charged to expense are deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense are deferred as regulatory liabilities, based on the expected return to customers in future rates. The Company records items as regulatory assets or liabilities if, based on regulatory orders or other available evidence, it is probable that the costs or obligations will be included in amounts allowable for recovery or refunded in future rates. Auditing regulatory assets and liabilities is complex as it requires specialized knowledge of rate-regulated activities and judgments about matters that could affect the recording of regulatory assets and liabilities.
How We Addressed the Matter in Our Audit									We obtained an understanding, evaluated the design, and tested the operating effectiveness of internal controls over the Company’s accounting for regulatory assets and liabilities, including, among others, controls over the evaluation of filings with regulatory bodies and their effects on existing regulatory assets and liabilities, including factors that may affect the timing or nature of recoverability. We performed audit procedures that included, among others, reviewing evidence of correspondence with regulatory bodies to test that the Company evaluated information obtained from regulatory rulings. For example, we assessed the recoverability, considering information obtained from regulatory orders, of regulatory assets. In addition, we tested calculations of regulatory assets and liabilities, including that the amortization for certain regulatory assets and liabilities corresponded to relevant regulatory filings and/or orders.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 1995.

Houston, Texas

February 25, 2025

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Transcontinental Gas Pipe Line Company, LLC

Statement of Net Income


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Revenues:
Natural gas transportation service revenues	$	2,619	$	2,506	$	2,503
Natural gas storage service revenues	200		186		193
Natural gas product sales	118		137		179
Other service revenues	27		37		34
Total revenues	2,964		2,866		2,909

Costs and expenses:
Natural gas product costs	118		137		179
Operating and maintenance expenses	510		517		531
Selling, general, and administrative expenses	216		215		225
Depreciation and amortization expenses	545		519		513
Taxes, other than income taxes	111		105		98

Other (income) expense – net	(35)		(38)		(7)
Total costs and expenses	1,465		1,455		1,539

Operating income (loss)	1,499		1,411		1,370

Interest expense	(324)		(324)		(327)
Interest income	58		87		36
Allowance for equity and borrowed funds used during construction (AFUDC)	88		77		28
Other income (expense) – net	(8)		(4)		(7)

Net income (loss)	$	1,313	$	1,247	$	1,100

See the Combined Notes to Financial Statements.

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Transcontinental Gas Pipe Line Company, LLC

Balance Sheet


	December 31,
	2024		2023
	(Millions)
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	—
Trade accounts and other receivables:
Advances to affiliate	638		1,353
Trade	250		251
Affiliates	24		10
Other	12		11

Inventories	81		83



Regulatory assets	74		87
Other current assets and deferred charges	24		14
Total current assets	1,103		1,809



Property, plant, and equipment – net	14,103		13,330


Regulatory assets	320		299
Deferred charges and other	405		350



Total assets	$	15,931	$	15,788

LIABILITIES AND MEMBER’S EQUITY
Current liabilities:
Payables:
Trade	$	258	$	278
Affiliates	55		55
Regulatory liabilities	58		49
Other current liabilities	181		190
Asset retirement obligations	22		96
Long-term debt due within one year	35		32
Total current liabilities	609		700
Long-term debt	5,200		5,229
Regulatory liabilities	976		956
Asset retirement obligations	593		524
Deferred income and other	248		242
Contingent liabilities and commitments (Note 18)

Member’s equity:
Member’s capital	5,088		5,088
Retained earnings	3,217		3,049
Total member’s equity	$	8,305	$	8,137
Total liabilities and member’s equity	$	15,931	$	15,788

See the Combined Notes to Financial Statements.

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Transcontinental Gas Pipe Line Company, LLC

Statement of Changes in Member’s Equity


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Member’s Capital:
Balance at beginning of year	$	5,088	$	5,088	$	4,960
Cash contributions from parent	—		—		128


Balance at end of year	5,088		5,088		5,088
Retained Earnings:
Balance at beginning of year	3,049		3,022		2,760
Net income	1,313		1,247		1,100
Cash distributions to parent	(1,145)		(1,220)		(838)


Balance at end of year	3,217		3,049		3,022

Total Member’s Equity	$	8,305	$	8,137	$	8,110

See the Combined Notes to Financial Statements.

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Transcontinental Gas Pipe Line Company, LLC

Statement of Cash Flows


	Year Ended December 31,
	2024		2023		2022
	(Millions)
OPERATING ACTIVITIES:
Net income (loss)	$	1,313	$	1,247	$	1,100
Adjustments to reconcile net cash provided (used) by operating activities:
Depreciation and amortization	545		519		513

Allowance for equity funds used during construction (equity AFUDC)	(71)		(63)		(23)

Cash provided (used) by changes in current assets and liabilities:
Affiliate receivables	(14)		(1)		(1)
Trade and other accounts receivable	—		6		(20)

Inventories	2		10		(39)
Regulatory assets	13		37		(10)
Other current assets and deferred charges	(10)		27		(17)
Trade accounts payable	(4)		(18)		21
Affiliate payables	—		1		(15)

Other current liabilities	(63)		72		(31)

Other, including changes in noncurrent assets and liabilities	(15)		(122)		38
Net cash provided (used) by operating activities	1,696		1,715		1,516

FINANCING ACTIVITIES:

Proceeds from other financing obligations	2		7		9

Payments on other financing obligations	(32)		(29)		(26)

Cash distributions to parent	(1,145)		(1,220)		(838)
Cash contributions from parent	—		—		128

Net cash provided (used) by financing activities	(1,175)		(1,242)		(727)
INVESTING ACTIVITIES:
Property, plant, and equipment:
Capital expenditures (1)	(1,140)		(894)		(603)
Contributions and advances for construction costs	16		21		1
Dispositions - net	(110)		(51)		(33)
Advances to affiliate - net	715		460		(143)

Purchase of asset retirement obligations trust investments	(23)		(22)		(21)
Proceeds from sale of asset retirement obligations trust investments	21		13		10

Net cash provided (used) by investing activities	(521)		(473)		(789)


Increase (decrease) in cash and cash equivalents	—		—		—
Cash and cash equivalents at beginning of year	—		—		—
Cash and cash equivalents at end of year	$	—	$	—	$	—
____________________________
(1) Increase to property, plant and equipment, exclusive of equity AFUDC	$	(1,112)	$	(991)	$	(587)
Changes in related accounts payable and accrued liabilities	(28)		97		(16)
Capital expenditures	$	(1,140)	$	(894)	$	(603)

See the Combined Notes to Financial Statements.

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Report of Independent Registered Public Accounting Firm

To the Management Committee and Member of Northwest Pipeline LLC

Opinion on the Financial Statements

We have audited the accompanying balance sheets of Northwest Pipeline LLC (the Company) as of December 31, 2024 and 2023, the related statements of net income, changes in member’s equity and cash flows for each of the three years in the period ended December 31, 2024, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Critical Audit Matter

107

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Description of the Matter									Regulatory Assets and Liabilities As discussed in Note 1 to the financial statements, the Company is an interstate natural gas transmission company that is regulated by the Federal Energy Regulatory Commission (“FERC”) and applies accounting principles in Topic 980 for regulated operations. As such, certain incurred costs that would otherwise be charged to expense are deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense are deferred as regulatory liabilities, based on the expected return to customers in future rates. The Company records items as regulatory assets or liabilities if, based on regulatory orders or other available evidence, it is probable that the costs or obligations will be included in amounts allowable for recovery or refunded in future rates. Auditing regulatory assets and liabilities is complex as it requires specialized knowledge of rate-regulated activities and judgments about matters that could affect the recording of regulatory assets and liabilities.
How We Addressed the Matter in Our Audit									We obtained an understanding, evaluated the design, and tested the operating effectiveness of internal controls over the Company’s accounting for regulatory assets and liabilities, including, among others, controls over the evaluation of filings with regulatory bodies and their effects on existing regulatory assets and liabilities, including factors that may affect the timing or nature of recoverability. We performed audit procedures that included, among others, reviewing evidence of correspondence with regulatory bodies to test that the Company evaluated information obtained from regulatory rulings. For example, we assessed the recoverability, considering information obtained from regulatory orders, of regulatory assets. In addition, we tested calculations of regulatory assets and liabilities, including that amortization for certain regulatory assets and liabilities corresponded to relevant regulatory filings and/or orders.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 1986.

Houston, Texas

February 25, 2025

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Northwest Pipeline LLC

Statement of Net Income


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Revenues:
Natural gas transportation service revenues	$	416	$	415	$	430
Natural gas storage service revenues	15		15		13
Other service revenues	13		10		5
Total revenues	444		440		448

Costs and expenses:
Operating and maintenance expenses	95		88		84
Selling, general, and administrative expenses	51		51		52
Depreciation and amortization expenses	111		111		114
Taxes, other than income taxes	14		12		17

Other (income) expense - net	(18)		(16)		22
Total costs and expenses	253		246		289

Operating income (loss)	191		194		159

Interest expense	(28)		(28)		(31)
Allowance for equity and borrowed funds used during construction (AFUDC)	10		4		3
Other income (expense) – net	7		10		6

Net income (loss)	180		180		137

See the Combined Notes to Financial Statements.

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Northwest Pipeline LLC

Balance Sheet


	December 31,
	2024		2023
	(Millions)
ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	—
Trade accounts and other receivables:
Advances to affiliate	—		158
Trade	39		39
Affiliates	—		1
Other	2		1

Inventories	9		8



Regulatory assets	6		2
Other current assets and deferred charges	6		5
Total current assets	62		214



Property, plant, and equipment – net	2,129		1,949


Regulatory assets	49		36
Deferred charges and other	29		28



Total assets	$	2,269	$	2,227

LIABILITIES AND MEMBER’S EQUITY
Current Liabilities:
Payables:
Advances from affiliate	$	26	$	—
Trade	48		48
Affiliates	12		13
Regulatory liabilities	20		21
Other current liabilities	34		34

Long-term debt due within one year	85		—
Total current liabilities	225		116
Long-term debt	497		581
Regulatory liabilities	233		252
Asset retirement obligations	144		136
Deferred income and other	7		9
Contingent liabilities and commitments (Note 18)

Member’s Equity:
Member’s capital	1,074		1,074
Retained earnings	89		59
Total member’s equity	$	1,163	$	1,133
Total liabilities and member’s equity	$	2,269	$	2,227

See the Combined Notes to Financial Statements.

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Northwest Pipeline LLC

Statement of Changes in Member’s Equity


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Member’s Capital:
Balance at beginning and end of year	$	1,074	$	1,074	$	1,074
Retained Earnings:
Balance at beginning of year	59		34		35
Net income	180		180		137
Cash distributions to parent	(150)		(155)		(138)
Balance at end of year	89		59		34






Total Member’s Equity	$	1,163	$	1,133	$	1,108

See the Combined Notes to Financial Statements.

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Northwest Pipeline LLC

Statement of Cash Flows


	Year Ended December 31,
	2024		2023		2022
	(Millions)
OPERATING ACTIVITIES:
Net income (loss)	$	180	$	180	$	137
Adjustments to reconcile net cash provided (used) by operating activities:
Depreciation and amortization	111		111		114



Allowance for equity funds used during construction (equity AFUDC)	(8)		(3)		(2)
Cash provided (used) by changes in current assets and liabilities:
Affiliate receivables	1		—		(1)
Trade and other accounts receivable	(1)		—		(1)

Inventories	(1)		1		—

Other current assets and deferred charges	(2)		1		—
Trade accounts payable	(3)		4		(1)
Affiliate payables	(1)		1		(1)

Regulatory liabilities	1		(126)		145
Other current liabilities	(3)		3		1
Other, including changes in noncurrent assets and liabilities:
Regulatory assets	(15)		(29)		—
Regulatory liabilities	(27)		(20)		(120)
Other, net	7		6		(3)
Net cash provided (used) by operating activities	239		129		268

FINANCING ACTIVITIES:



Cash distributions to parent	(150)		(155)		(138)
Advances from affiliate, net	26		—		—
Net cash provided (used) by financing activities	(124)		(155)		(138)

INVESTING ACTIVITIES:
Property, plant, and equipment:
Capital expenditures (1)	(266)		(125)		(107)
Contributions and advances for construction costs	5		6		11
Dispositions - net	(12)		(8)		(5)
Advances to affiliate - net	158		153		(29)

Net cash provided (used) by investing activities	(115)		26		(130)

Increase (decrease) in cash and cash equivalents	—		—		—
Cash and cash equivalents at beginning of year	—		—		—
Cash and cash equivalents at end of year	$	—	$	—	$	—
____________________________________
(1) Increases to property, plant and equipment, exclusive of equity AFUDC	$	(266)	$	(140)	$	(109)
Changes in related accounts payable and accrued liabilities	—		15		2
Capital expenditures	$	(266)	$	(125)	$	(107)

See the Combined Notes to Financial Statements.

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Index of Combined Notes to Financial Statements

The Combined Notes to Financial Statements include information for multiple registrants, specifically The Williams Companies, Inc. (Williams), as well as Transcontinental Gas Pipe Line Company, LLC (Transco) and Northwest Pipeline LLC (NWP), both of which are wholly owned subsidiaries of Williams (collectively, the Registrants). The following list indicates the Registrants to which each of the combined notes apply. Specific disclosures within each combined note may apply to all Registrants unless indicated otherwise.

Note

Registrant

Page

Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies

Williams, Transco, NWP

113

Note 2 – Variable Interest Entities

Williams

129

Note 3 – Acquisitions and Divestitures

Williams

130

Note 4 – Related Party Transactions

Williams, Transco, NWP

138

Note 5 – Revenue Recognition

Williams, Transco, NWP

142

Note 6 – Provision (Benefit) for Income Taxes

Williams

146

Note 7 – Employee Benefit Plans

Williams

149

Note 8 – Investing Activities

Williams

154

Note 9 – Property, Plant, and Equipment

Williams, Transco, NWP

157

N ote 10 – R egulatory Assets and Lia bilities

Williams, Transco, NWP

159

Note 1 1 – Goodwill and Other Intangible Assets

Williams

164

Note 12 – Other Current Liabilities

Williams, Transco, NWP

166

Note 1 3 – Debt and Banking Arrangements

Williams, Transco, NWP

167

Note 1 4 – Leases

Williams, Transco, NWP

172

Note 1 5 – Equity-Based Compensation

Williams

174

Note 1 6 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk

Williams, Transco, NWP

176

Note 1 7 – Commodity Derivatives

Williams

180

Note 1 8 – Contingencies and Commitments

Williams, Transco, NWP

182

Note 1 9 – Segment Disclosures

Williams, Transco, NWP

185

Note 20 – Subsequent Events

Williams

191

Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies

General

Description of Business

Williams

Williams is a Delaware corporation whose common stock is listed and traded on the New York Stock Exchange. Its operations are located in the United States and are presented within the following reportable segments:

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Notes (Continued)

Transmission & Gulf of America, Northeast G&P, West, and Gas & NGL Marketing Services, consistent with the manner in which Williams’ Chief Executive Officer, the chief operating decision maker, evaluates performance and allocates resources. All remaining business activities, including upstream operations, certain new energy ventures, and corporate activities, are included in Other.

Transmission & Gulf of America is comprised of the Transco, NWP, and MountainWest Pipelines Holding Company (MountainWest) interstate natural gas pipelines and their related natural gas storage facilities, as well as the natural gas gathering and processing and crude oil production handling and transportation assets in the Gulf Coast region, including Discovery Producer Services LLC (Discovery), a former 60 percent equity-method investment in which Williams acquired the remaining ownership interest in August 2024 (see Note 3 – Acquisitions and Divestitures), a 51 percent interest in Gulfstar One LLC (Gulfstar One) (a consolidated variable interest entity, or VIE), and a 50 percent equity-method investment in Gulfstream Natural Gas System, L.L.C. (Gulfstream). Transmission & Gulf of America also includes natural gas storage facilities and pipelines providing services in north Texas, and also in Louisiana and Mississippi related to the January 2024 Gulf Coast Storage Acquisition (see Note 3 – Acquisitions and Divestitures).

Northeast G&P is comprised of Williams’ midstream gathering, processing, and fractionation businesses in the Marcellus Shale region primarily in Pennsylvania and New York, and the Utica Shale region of eastern Ohio, as well as a 65 percent interest in Ohio Valley Midstream LLC (Northeast JV) (a consolidated VIE) which operates in West Virginia, Ohio, and Pennsylvania, a 66 percent interest in Cardinal Gas Services, L.L.C. (Cardinal) (a consolidated VIE) which operates in Ohio, a 69 percent equity-method investment in Laurel Mountain Midstream, LLC (Laurel Mountain), a 50 percent equity-method investment in Blue Racer Midstream LLC (Blue Racer), and Appalachia Midstream Services, LLC, a wholly owned subsidiary that owns equity-method investments with an approximate average 66 percent interest in multiple gas gathering systems in the Marcellus Shale region (Appalachia Midstream Investments).

West is comprised of Williams’ gas gathering, processing, and treating operations in the Rocky Mountain region of Colorado and Wyoming, the Barnett Shale region of north-central Texas, the Eagle Ford Shale region of south Texas, the Haynesville Shale region of east Texas and northwest Louisiana, the Mid-Continent region which includes the Anadarko and Permian basins, and the Denver-Julesberg Basin (DJ Basin) of Colorado which includes Rocky Mountain Midstream Holdings LLC (RMM), a former 50 percent equity-method investment that Williams acquired the remaining ownership interest in November 2023 (see Note 3 – Acquisitions and Divestitures). This segment also includes Williams’ natural gas liquid (NGL) storage facilities, an undivided 50 percent interest in an NGL fractionator near Conway, Kansas, and a 50 percent equity-method investment in Overland Pass Pipeline Company LLC (OPPL).

Gas & NGL Marketing Services is comprised of Williams’ NGL and natural gas marketing and trading operations, which includes risk management and transactions related to the storage and transportation of natural gas and NGLs on strategically positioned assets.

Transco

Transco is an interstate natural gas transmission company that owns and operates a natural gas pipeline system extending from Texas, Louisiana, Mississippi and the Gulf of America through Alabama, Georgia, South Carolina, North Carolina, Virginia, Maryland, Delaware, Pennsylvania, and New Jersey to the New York City metropolitan area. The system serves customers in Texas and the 12 southeast and Atlantic seaboard states mentioned above, including major metropolitan areas in Georgia, Washington D.C., Maryland, North Carolina, New York, New Jersey, and Pennsylvania. Transco is a single-member limited liability company, and as such, single-member losses are limited to the amount of its investment.

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NWP

NWP owns and operates an interstate pipeline system for the mainline transmission of natural gas. This system extends from the San Juan Basin in northwestern New Mexico and southwestern Colorado through Colorado, Utah, Wyoming, Idaho, Oregon, and Washington to a point on the Canadian border near Sumas, Washington. NWP is a single-member limited liability company, and as such, single-member losses are limited to the amount of its investment.

Basis of Presentation

Discontinued Operations

During 2023, Williams recorded pre-tax charges of $125 million to Income (loss) from discontinued operations in the Consolidated Statement of Income related to litigation associated with its former Alaska refinery. Payments were made in January 2024 and the claims against Williams are now resolved. Except for this item and unless indicated otherwise, the information in the Combined Notes to Financial Statements relates to continuing operations.

Net gain from Energy Transfer Litigation Judgment

In November 2023, Williams received a $627 million payment from Energy Transfer Equity, L.P. (Energy Transfer) for the final order and judgment in connection to a lawsuit for breach of the Agreement and Plan of Merger with Energy Transfer. On the same day, Williams paid attorney fees which had been incurred on a contingent fee basis. This resulted in a net gain of $534 million reported as Net gain from Energy Transfer litigation judgment in the Consolidated Statement of Income for the year ended December 31, 2023.

Reclassifications

Certain prior-year amounts for Transco and NWP have been reclassified to conform to the current year’s presentation. These reclassifications had no impact on Transco’s or NWP’s net income (loss), working capital, cash flows or total member’s equity previously reported.

Summary of Significant Accounting Policies

Principles of Consolidation

Williams’ consolidated financial statements include the accounts of all entities that Williams controls and its proportionate interest in the accounts of certain ventures in which it owns an undivided interest. Management’s judgment is required to evaluate whether it controls an entity. Key areas of that evaluation include:

•Determining whether an entity is a VIE (see Note 2 – Variable Interest Entities);

•Determining whether Williams is the primary beneficiary of a VIE, including evaluating which activities of a VIE most significantly impact its economic performance and the degree of power that Williams and its related parties have over those activities through its variable interests;

•Identifying events that require reconsideration of whether an entity is a VIE and continuously evaluating whether Williams is a VIE’s primary beneficiary;

•Evaluating whether other owners in entities that are not VIEs are able to effectively participate in significant decisions that would be expected to be made in the ordinary course of business such that Williams does not have the power to control such entities.

Williams applies the equity method of accounting to investments over which it exercises significant influence but does not control. Distributions received from equity-method investees are presented in the Consolidated Statement of Cash Flows according to the nature of the distributions approach, which classifies distributions

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received from equity-method investees as either returns on investment (cash inflows from operating activities) or returns of investment (cash inflows from investing activities) based on the nature of the activities of the equity-method investee that generated the distribution.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying combined notes. Actual results could differ from those estimates.

Significant estimates and assumptions may include:

•Impairment assessments of investments, property, plant, and equipment, and intangible assets;

•Litigation-related contingencies;

•Environmental remediation obligations;

•Depreciation and amortization of long-lived assets, which are comprised of property, plant, and equipment, and intangible assets;

•Depreciation and/or amortization of equity-method investment basis differences;

•Asset retirement obligations (AROs);

•Measurement of fair value of commodity derivatives;

•Pension and postretirement valuation variables;

•Measurement of regulatory assets and liabilities;

•Measurement of deferred income tax assets and liabilities, including assumptions related to the realization of deferred income tax assets;

•Revenue recognition, including estimates utilized in recognition of deferred revenue;

•Purchase price accounting.

These estimates are discussed further throughout these combined notes.

Regulatory Accounting

Transco, NWP, and MountainWest are regulated by the Federal Energy Regulatory Commission (FERC), and these regulated entities’ rates may also be negotiated with customers pursuant to the terms of tariffs and FERC policy. Therefore, management has determined that it is appropriate under Accounting Standards Codification (ASC) Topic 980, “Regulated Operations,” (ASC 980) that certain costs that would otherwise be charged to expense should be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense should be deferred as regulatory liabilities, based on the expected return to customers in future rates. Management’s expected recovery of deferred costs and return of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment. Certain incurred costs and obligations are recorded as regulatory assets or liabilities if, based on regulatory orders or other available evidence, it is probable that the costs or obligations will be included in amounts allowable for recovery or refunded in future rates. Accounting for these operations that are regulated can differ from the accounting requirements for nonregulated operations. For example, for regulated operations, allowance for funds used during construction (AFUDC) represents the estimated cost of debt and equity funds applicable to utility plant in the process of construction and is capitalized as a cost of property, plant, and equipment because it constitutes an

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actual cost of construction under established regulatory practices; nonregulated operations are only allowed to capitalize the cost of debt funds related to construction activities, while a component for equity is prohibited. Management has determined that for its regulated entities, it is appropriate to apply the accounting prescribed by ASC 980 and, accordingly, the accompanying financial statements include the effects of the types of transactions described above that result from regulatory accounting requirements (see Note 10 – Regulatory Assets and Liabilities).

The FERC has prescribed a formula to be used in computing separate allowances for borrowed and equity AFUDC. These allowances are recorded as follows:

Transco


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Allowance for borrowed funds used during construction	$	17	$	14	$	5
Allowance for equity funds used during construction	71		63		23
Allowance for equity and borrowed funds used during construction (AFUDC)	$	88	$	77	$	28

NWP


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Allowance for borrowed funds used during construction	$	2	$	1	$	1
Allowance for equity funds used during construction	8		3		2
Allowance for equity and borrowed funds used during construction (AFUDC)	$	10	$	4	$	3

Revenue Recognition

Customers in Williams’ gas pipeline businesses, including Transco and NWP, are comprised of public utilities, municipalities, gas marketers and producers, intrastate pipelines, direct industrial users, and electrical power generators. Customers in Williams’ midstream businesses are comprised of oil and natural gas producer counterparties. Customers for Williams’ product sales are comprised of public utilities, gas marketers, and direct industrial users.

Service revenue contracts from Williams’ gas pipeline and midstream businesses, including Transco and NWP, contain a series of distinct services, with the majority of the contracts having a single performance obligation that is satisfied over time as the customer simultaneously receives and consumes the benefits provided. Most of the product sales contracts have a single performance obligation with revenue recognized at a point in time when the products have been sold and delivered to the customer.

Certain customers reimburse Williams for costs it incurs associated with construction of property, plant, and equipment utilized in its operations. For Williams’ rate-regulated gas pipeline businesses, including Transco and NWP, that apply ASC 980, Williams follows FERC guidelines with respect to reimbursement of construction costs. FERC tariffs only allow for cost reimbursement and are non-negotiable in nature; thus, in management’s judgment, the construction activities do not represent an ongoing major and central operation of the gas pipeline businesses and are not within the scope of ASC Topic 606, “Revenue from Contracts with Customers”. Accordingly, cost reimbursements are treated as a reduction to the cost of the constructed asset. For the midstream businesses, reimbursement and service contracts with customers are viewed together as providing the same commercial objective, as Williams has the ability to negotiate the mix of consideration between reimbursements and amounts

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billed over time. Accordingly, Williams generally recognizes reimbursements of construction costs from customers on a gross basis as a contract liability separate from the associated costs included within property, plant, and equipment. The contract liability is recognized into service revenues as the underlying performance obligations are satisfied.

Service Revenues

Gas pipeline businesses

Revenues from the regulated interstate natural gas pipeline businesses, including Transco and NWP, which are subject to regulation by certain state and federal authorities, including the FERC, include both firm and interruptible transportation and storage contracts. Firm transportation and storage agreements provide for a daily or monthly reservation charge based on the pipeline or storage capacity reserved, and a commodity charge based on the volume of natural gas delivered/stored, each at rates specified in the FERC tariffs or based on negotiated contractual rates, with contract terms that are generally long-term in nature. Most of the long-term contracts contain an evergreen provision, which allows the contracts to be extended for periods primarily up to one year in length an indefinite number of times following the specified contract term and until terminated generally by either party. Interruptible transportation and storage agreements provide for a volumetric charge based on actual commodity transportation or storage utilized in the period in which those services are provided, and the contracts are generally limited to one-month periods or less. The related performance obligations include the following:

•Firm transportation or storage under firm transportation and storage contracts—an integrated package of services typically constituting a single performance obligation, which includes standing ready to provide such services and receiving, transporting or storing (as applicable), and redelivering commodities;

•Interruptible transportation or storage under interruptible transportation and storage contracts—an integrated package of services typically constituting a single performance obligation once scheduled, which includes receiving, transporting or storing (as applicable), and redelivering commodities.

In situations where, in management’s judgment, it considers the integrated package of services as a single performance obligation, which represents a majority of its interstate natural gas pipeline contracts with customers, management does not consider there to be multiple performance obligations because the nature of the overall promise in the contract is to stand ready (with regard to firm transportation and storage contracts), receive, transport or store, and redeliver natural gas to the customer; therefore, revenue is recognized over time upon satisfaction of the daily stand ready performance obligation.

Revenues are recognized for reservation charges over the performance obligation period, which is the contract term, regardless of the volume of natural gas that is transported or stored. Revenues for commodity charges from both firm and interruptible transportation services and storage services are recognized when natural gas is delivered at the agreed upon delivery point or when natural gas is injected or withdrawn from the storage facility because they specifically relate to efforts to provide these distinct services. Generally, reservation charges and commodity charges in the interstate natural gas pipeline businesses are recognized as revenue in the same period they are invoiced to its customers. As a result of the ratemaking process, certain amounts collected may be subject to refund upon the issuance of final orders by the FERC in pending rate proceedings. Management uses judgment to record estimates of rate refund liabilities considering its and other third-party regulatory proceedings, advice of counsel, and other risks. As of December 31, 2024 and 2023, there were no such rate refund liabilities for Transco and NWP.

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Midstream businesses

Revenues from the nonregulated gathering, processing, transportation, and storage midstream businesses include contracts for natural gas gathering, processing, treating, compression, transportation, and other related services with contract terms that are generally long-term in nature and may extend up to the production life of the associated reservoir. Additionally, the midstream businesses generate revenues from fees charged for storing customers’ natural gas and NGLs, generally under prepaid contracted storage capacity contracts. In situations where, in management’s judgment, it provides an integrated package of services combined into a single performance obligation, which represents a majority of this class of contracts with customers, Williams does not consider there to be multiple performance obligations because the nature of the overall promise in the contract is to provide gathering, processing, transportation, storage, and related services resulting in the delivery, or redelivery in the context of storage services, of pipeline-quality natural gas and NGLs to the customer. As such, revenue is recognized at the daily completion of the integrated package of services as the integrated package represents a single performance obligation. Additionally, certain contracts in the midstream businesses contain fixed or upfront payment terms that result in the deferral of revenues until such services have been performed or such capacity has been made available.

Williams also earns revenues from offshore crude oil and natural gas gathering and transportation and offshore production handling. These services represent an integrated package of services and are considered a single distinct performance obligation for which Williams recognizes revenues as the services are provided to the customer.

Williams generally earns a contractually stated fee per unit for the volume of product transported, gathered, processed, or stored. The rate is generally fixed; however, certain contracts contain variable rates that are subject to change based on commodity prices, levels of throughput, or an annual adjustment based on a formulaic cost-of-service calculation. In addition, Williams has contracts with contractually stated fees that decline over the contract term, such as declines based on the passage of time periods or achievement of cumulative throughput amounts. The excess of consideration received over revenue recognized results in the deferral of those amounts until future periods based on a units of production or straight-line methodology as these methods appropriately match the consumption of services provided to the customer. The units of production methodology requires the use of production estimates that are uncertain and the use of judgment when developing estimates of future production volumes, thus impacting the rate of revenue recognition. Production estimates are monitored as circumstances and events warrant. Certain of Williams’ gas gathering and processing agreements have minimum volume commitments (MVC). If a customer under such an agreement fails to meet its MVC for a specified period (thus not exercising all the contractual rights to gathering and processing services within the specified period, herein referred to as “breakage”), it is obligated to pay a contractually determined fee based upon the shortfall between the actual gathered or processed volumes and the MVC for the period contained in the contract. When Williams concludes, based on management’s judgment, it is probable that the customer will not exercise all or a portion of its remaining rights, Williams recognizes revenue associated with such breakage amount in proportion to the pattern of exercised rights within the respective MVC period.

Under keep-whole and percent-of-liquids processing contracts, Williams receives commodity consideration in the form of NGLs and takes title to the NGLs at the tailgate of the plant. Williams recognizes such commodity consideration as service revenue based on the market value of the NGLs retained at the time the processing is provided. The current market value, as opposed to the market value at the contract inception date, is used due to a combination of factors, including the fact that the volume, mix, and market price of NGL consideration to be received is unknown at the time of contract execution and is not specified in Williams’ contracts with customers. Additionally, product sales revenue (discussed below) is recognized upon the sale of the NGLs to a third party based on the sales price at the time of sale. As a result, revenue is recognized in the Consolidated Statement of Income both at the time the processing service is provided in Service revenues – commodity consideration and at the time the NGLs retained as part of the processing service are sold in Product

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sales. The recognition of revenue related to commodity consideration has the impact of increasing the book value of NGL inventory, resulting in higher cost of goods sold at the time of sale.

Product Sales

In the course of providing transportation services to customers of the gas pipeline businesses, including Transco, and gathering and processing services to customers of the midstream businesses, different quantities of natural gas may be received from customers than the quantities delivered on behalf of those customers. The resulting imbalances are primarily settled monthly through the purchase or sale of natural gas with each customer under terms provided for in FERC tariffs or gathering and processing agreements, respectively. Revenue is recognized for Transco from the sale of natural gas upon settlement of imbalances (see Gas Imbalances below).

In certain instances, Williams purchases NGLs, crude oil, and natural gas from its oil and natural gas producer customers which Williams remarkets. In addition, Williams retains NGLs as consideration in certain processing arrangements, as discussed above in the Service Revenues - Midstream businesses section. Williams also markets natural gas and NGLs from the production at its upstream properties. Williams recognizes revenue from the sale of these commodities when the products have been sold and delivered. Williams’ product sales contracts are primarily short-term contracts based on prevailing market rates at the time of the transaction.

The physical purchase, transportation, storage, and sale of natural gas associated with these natural gas purchases are accounted for on a weighted-average cost or accrual basis, as appropriate, unlike the fair value basis utilized for the commodity derivatives used to mitigate the natural gas price risk associated with the storage and transportation portfolio. Monthly demand charges are incurred for contracted storage and transportation capacity and payments associated with asset management agreements and these demand charges and payments are recognized in the Consolidated Statement of Income in the period they are incurred.

As Williams is acting as an agent for its natural gas marketing customers and engages in energy trading activities, its natural gas marketing revenues are presented net of the related costs of those activities.

Contract Assets

Williams

Contract assets in the Consolidated Balance Sheet primarily consist of revenue recognized under contracts containing MVC features whereby management has concluded it is probable there will be a short-fall payment at the end of the current MVC period, which typically follows the calendar year, and that a significant reversal of revenue recognized currently for the future MVC payment will not occur. As a result, Williams’ contract assets related to its future MVC payments are generally expected to be collected within the next 12 months and are included within Other current assets and deferred charges in the Consolidated Balance Sheet until such time as the MVC short-fall payments are invoiced to the customer.

Transco and NWP

Transco’s contract assets primarily result from the modification of an existing contract resulting in increased rates. NWP’s contract assets consist of discounts provided to customers in the beginning of the contract term that are recognized on a straight-line basis over the entire contract term resulting in revenue

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recognition occurring prior to actual billings. Current and noncurrent contract assets are included within Other current assets and deferred charges and Deferred charges and other, respectively, in the Balance Sheets.

Contract Liabilities

Williams

Contract liabilities in the Consolidated Balance Sheet consist of advance payments primarily from midstream business customers which include construction reimbursements, prepayments, and other billings and transactions for which future services are to be provided under the contract. These amounts are deferred until recognized in revenue when the associated performance obligation has been satisfied, which is primarily based on a units of production methodology over the remaining contractual service periods, and are classified as current or noncurrent according to when such amounts are expected to be recognized. Current and noncurrent contract liabilities are included within Other current liabilities and Regulatory liabilities, deferred income, and other, respectively, in the Consolidated Balance Sheet.

Contracts requiring advance payments and the recognition of contract liabilities are evaluated to determine whether the advance payments provide Williams with a significant financing benefit. This determination is based on the combined effect of the expected length of time between when Williams transfers the promised good or service to the customer, when the customer pays for those goods or services, and the prevailing interest rates. Williams has assessed its contracts for significant financing components and determined, in management’s judgment, that one group of contracts entered into in contemplation of one another for certain capital reimbursements contains a significant financing component. As a result, Williams recognizes noncash interest expense based on the effective interest method and revenue (noncash) is recognized when the underlying asset is placed into service utilizing a units of production or straight-line methodology over the life of the corresponding customer contract.

Transco and NWP

Transco’s contract liabilities consist of advance payments from customers, which include prepayments, and other billings for which future services are to be provided under the contract, and NWP’s contract liabilities consist of a fixed rate facility charge billed to customers with a declining rate structure in its tariffs. Transco assessed its contracts and determined none contain a significant financing component. These liabilities are classified as current or noncurrent according to when such amounts are expected to be recognized. Current and noncurrent contract liabilities are included within Other current liabilities and Deferred charges and other, respectively, in the Balance Sheets.

Commodity Derivative Instruments and Hedging Activities

Williams is exposed to commodity price risk and utilizes derivatives to manage a portion of its commodity price risk. These instruments consist primarily of swaps, futures, and forward contracts involving short- and long-term purchases and sales of energy commodities. Williams purchases natural gas for storage when the current market price paid to buy and transport natural gas plus the cost to store and finance the natural gas is less than an estimated, forward market price that can be received in the future. Additionally, Williams enters into transactions to secure transportation capacity between delivery points in order to serve its customers and various markets. Commodity-based exchange-traded futures contracts and OTC contracts are used to capture the price differential or spread between the locations served by the capacity in order to substantially protect the natural gas revenues that will ultimately be realized when the physical flow of natural gas between receipt and delivery points occurs. Some commodity derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the natural gas marketing operations. These contracts generally meet the definition of derivatives and are typically not designated as hedges for accounting purposes. When a commodity derivative contract is settled physically, any cumulative unrealized gain or loss is reversed, and the contract price is recognized in the respective line item in the Consolidated Statement of Income representing the

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actual price of the underlying goods being delivered. As of December 31, 2024 and 2023, Williams is not applying hedge accounting to any commodity derivative instruments.

Unrealized gains and losses from physically settled commodity derivative contracts for commodity sales transactions are recognized in Net gain (loss) from commodity derivatives in the Consolidated Statement of Income. Realized and unrealized gains and losses from non-designated commodity derivative contracts for commodity sales transactions that are financially settled are reported in Net gain (loss) from commodity derivatives in the Consolidated Statement of Income. Net gains and losses from derivatives for shrink gas purchases for processing plants are reported in Net processing commodity expenses in the Consolidated Statement of Income.

Williams reports the fair value of derivatives, except those for which the normal purchases and normal sales exception has been elected, in Derivative assets; Regulatory assets, deferred charges, and other; Derivative liabilities; or Regulatory liabilities, deferred income, and other in the Consolidated Balance Sheet. These amounts are presented on a net basis and reflect the netting of asset and liability positions permitted under the terms of master netting arrangements and cash held on deposit in margin accounts that Williams has received or remitted to collateralize certain derivative positions. Williams determines the current and noncurrent classification based on the timing of expected future cash flows of individual trades.

The accounting for the changes in fair value of a commodity derivative can be summarized as follows:


Derivative Treatment						Accounting Method
Normal purchases and normal sales exception						Accrual accounting
All other derivatives						Mark-to-market accounting

Williams may elect the normal purchases and normal sales exception for certain short- and long-term purchases and sales of physical energy commodities. Under accrual accounting, any change in the fair value of these derivatives is not reflected in the Consolidated Balance Sheet after the initial election of the exception.

Interest Capitalized

For its non-regulated companies, Williams capitalizes interest on its debt using the weighted-average interest rate on debt excluding debt issued by Transco, NWP, and MountainWest. This is included in Interest expense in Williams’ Consolidated Statement of Income.

For Williams’ regulated interstate natural gas pipelines, including Transco, NWP, and MountainWest, interest is capitalized from its borrowed funds and from internally generated funds (equity AFUDC) (see Regulatory Accounting). The former is included in Interest expense and the latter is included in Other income (expense) – net below Operating income (loss) in Williams’ Consolidated Statement of Income and Allowance for equity and borrowed funds used during construction (AFUDC) in Transco and NWP’s Statement of Net Income (see Note 9 – Property, Plant, and Equipment).

Income Taxes

Williams includes the operations of its domestic corporate subsidiaries and income from its subsidiary partnerships, as well as income from Transco and NWP which are treated as pass-through entities for state and local income tax purposes, in its consolidated federal income tax return and also files tax returns in various foreign and state jurisdictions as required. Deferred income taxes are computed using the liability method and are provided on

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all temporary differences between the financial basis and the tax basis of its assets and liabilities. Management’s judgment and income tax assumptions are used to determine the levels, if any, of valuation allowances associated with deferred tax assets.

Earnings (Loss) Per Common Share

Williams’ Basic earnings (loss) per common share in the Consolidated Statement of Income is based on the sum of the weighted-average number of common shares outstanding and vested restricted stock units. Diluted earnings (loss) per common share in the Consolidated Statement of Income primarily includes any dilutive effect of nonvested restricted stock units and stock options. Diluted earnings (loss) per common share may also include any dilutive effect of Williams’ preferred stock. Diluted earnings (loss) per common share is calculated using the treasury-stock method.

Cash and Cash Equivalents

Cash and cash equivalents in the Consolidated Balance Sheet consist of highly liquid investments with original maturities of three months or less when acquired.

Accounts Receivable

Accounts receivable are carried on a gross basis, with no discounting, less an allowance for doubtful accounts. Management estimates the allowance for doubtful accounts, considering current expected credit losses using a forward-looking “expected loss” model, the financial condition of its customers, and the age of past due accounts. The majority of trade receivable balances are due within 30 days. Management monitors the credit quality of its counterparties through review of collection trends, credit ratings, and other analyses, such as bankruptcy monitoring. Williams’ financial assets from its natural gas transmission business, natural gas storage business, gathering, processing and transportation business, marketing business, and upstream operations, as applicable, are segregated into separate pools for evaluation due to different counterparty risks inherent in each business, with Transco’s and NWP’s financial assets each evaluated as one pool. Changes in counterparty risk factors could lead to reassessment of the composition of financial assets as one pool, separate pools, or the need for additional pools. Management calculates its allowance for credit losses incorporating an aging method. In estimating its expected credit losses, management utilizes historical loss rates over many years, which for Williams includes periods of both high and low commodity prices. Transco’s and NWP’s expected credit loss estimates considered both internal and external forward-looking commodity price expectations, as well as counterparty credit ratings, and factors impacting near-term liquidity.

Commodity prices could have a significant impact on a portion of Williams’ gathering and processing and upstream counterparties’ financial health and ability to satisfy current obligations. Williams’ expected credit loss estimate considers both internal and external forward-looking commodity price expectations, as well as counterparty credit ratings, and factors impacting near-term liquidity. In addition, Williams’ expected credit loss estimate considers potential contractual, physical, and commercial protections and outcomes in the case of a counterparty bankruptcy. The physical location and nature of Williams’ services help to mitigate collectability concerns of its gathering and processing producer customers. Williams’ gathering lines in many cases are physically connected to the customers’ wellheads and pads, and there may not be alternative gathering lines nearby. The construction of gathering systems is capital intensive and it would be costly for others to replicate, especially considering the depletion to date of the associated reserves. As a result, Williams plays a critical role in getting customers’ production from the wellhead to a marketable condition and location. This tends to reduce collectability risk as Williams’ services enable producers to generate operating cash flows. Commodity price movements generally do not impact the majority of Williams’ natural gas transmission businesses customers’ financial condition.

Williams also provides marketing and risk management services to retail and wholesale gas marketers, utility companies, upstream producers, and industrial customers. These counterparties utilize netting agreements that enable Williams to net receivables and payables by counterparty upon settlement. Williams also nets across product lines and against cash collateral received to collateralize receivable positions, provided the netting and cash

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collateral agreements include such provisions. While the amounts due from, or owed to, Williams’ counterparties are settled net, these amounts are recorded on a gross basis in the Consolidated Balance Sheet as accounts receivable and accounts payable.

Extended payment terms are not offered and payments are typically received within one month. Receivables are considered past due if full payment is not received by the contractual due date. Past due accounts are generally written off against the allowance for doubtful accounts only after all collection attempts have been exhausted. Neither Williams, Transco, nor NWP have a material amount of significantly aged receivables at December 31, 2024 or 2023.

Gas Imbalances

Transco

Transco transports gas on various pipeline systems which may deliver different quantities of gas on behalf of Transco than the quantities of gas received from Transco. These transactions result in gas transportation and exchange imbalance receivables and payables which are recovered or repaid in cash or through the receipt or delivery of gas in the future and are recorded in the accompanying Balance Sheet. Revenues received from the cash-out of transportation imbalances in excess of costs incurred are deferred and offset by the deferral of costs incurred in excess of revenues received. At the end of each annual August through July reporting period, if the cumulative revenues received exceed the costs incurred, the over recovered amounts are applied to any prior under recovery balance or refunded. If the cumulative revenues received are less than the costs incurred, the net under recovered amounts are carried forward and offset against any future net over recoveries that may occur in a subsequent annual reporting period. These deferred recoveries are recognized as Regulatory assets in Transco’s Balance Sheet (see Note 10 – Regulatory Assets and Liabilities).

The settlement of imbalances requires agreement between the pipelines and shippers as to allocations of volumes to specific transportation contracts and timing of delivery of gas based on operational conditions. These imbalances are classified as Other current assets and deferred charges and Other current liabilities in Transco’s Balance Sheet (see Note 10 – Regulatory Assets and Liabilities). Transco utilizes the average cost method of accounting for gas imbalances.

NWP

In the course of providing transportation services to customers, NWP may receive different quantities of natural gas from customers than the quantities delivered on behalf of those customers or consumed in fuel to operate NWP’s system. The resulting customer imbalances are typically settled through the receipt or delivery of gas in the future based on the timelines outlined in NWP’s tariff, whereas the over/under recovery of fuel is cleared up through NWP’s semi-annual fuel tracker. Customer imbalances to be repaid or recovered in-kind are recorded as Other current assets and deferred charges or Other current liabilities in NWP’s Balance Sheet. The under recovery of fuel is recorded as Regulatory assets and the over recovery is recorded in Regulatory liabilities in NWP’s Balance Sheet (see Note 10 – Regulatory Assets and Liabilities). These imbalances are valued at published spot rates.

Inventories

Inventories in Williams’ Consolidated Balance Sheet primarily consist of NGLs, materials and supplies, and natural gas in underground storage and are primarily stated at the lower of cost or net realizable value. The cost of inventories are primarily determined using the average cost method. Inventories in Transco’s and NWP’s Balance Sheets primarily consist of materials and supplies and natural gas in underground storage.

Transco and NWP Environmental Matters

Transco and NWP are subject to federal, state, and local environmental laws and regulations. Environmental expenditures are expensed or capitalized depending on the economic benefit and potential for rate recovery. These

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entities believe that expenditures required to meet applicable environmental laws and regulations are prudently incurred in the ordinary course of business and such expenditures would be permitted to be recovered through rates with limited exceptions.

In accordance with the Climate Commitment Act of the state of Washington, which established a market-based cap-and-invest program, NWP is required to obtain emission allowances for the carbon emissions from nine of NWP’s thirteen compressor stations within the state of Washington whose annual carbon emissions exceed 25,000 metric tons of carbon dioxide equivalent at least once since 2015. NWP records the purchased emission allowances at cost and the associated accumulated interest to a regulatory asset. The difference between the allowances held and the allowances required based on actual emissions for the period are measured using an estimate based on NWP’s most recent cost of allowances and accrued to a current liability and to a regulatory asset. NWP’s Petition for Approval of Pre-Filing Stipulation and Settlement Agreement (Settlement) in Docket No. RP22-1155, which FERC approved in 2022, allows NWP to recover the costs of purchasing allowances under the program in its next rate case (see Note 18 – Contingencies and Commitments).

Property, Plant, and Equipment

Property, plant, and equipment is initially recorded at cost. The carrying value of these assets is based on estimates, assumptions, and judgments relative to capitalized costs, useful lives, and salvage values. For the Transco, NWP, and MountainWest interstate natural gas pipelines, these estimates, assumptions and judgments reflect FERC regulations, as well as historical experience and expectations regarding future industry conditions and operations. The FERC identifies installation, construction and replacement costs that are to be capitalized. All other costs are expensed as incurred.

As regulated entities, Transco, NWP and MountainWest provide for depreciation primarily under the composite (group) method using straight-line FERC-prescribed rates. Under this method, assets with similar lives and characteristics are grouped and depreciated as one asset. These regulated entities’ depreciation rates are subject to change each time these regulated entities file a general rate case with the FERC. Included in Transco’s and NWP’s depreciation rates is a negative salvage component (net cost of removal) that Transco and NWP currently collect in rates that is recorded as a regulatory liability in the Balance Sheets (see Note 10 – Regulatory Assets and Liabilities).

Depreciation for Williams’ nonregulated entities is provided primarily on the straight-line method over estimated useful lives.

Williams follows the successful efforts method of accounting for its upstream properties. Its oil and gas producing property costs are depreciated using the units of production method.

Gains or losses from the ordinary sale or retirement of property, plant, and equipment for the Transco, NWP, and MountainWest interstate natural gas pipelines are credited or charged to accumulated depreciation; certain other gains or losses are recorded in Other (income) expense – net included in Operating income (loss) in the statements of income. Gains or losses from the ordinary sale or retirement of property, plant, and equipment for Williams’ nonregulated assets are primarily recorded in Other (income) expense – net included in Operating income (loss) in the Consolidated Statement of Income.

Ordinary maintenance and repair costs are generally expensed as incurred. Costs of major renewals and replacements are capitalized as property, plant, and equipment.

Williams records a liability and increases the basis in the underlying asset for the present value of each expected future ARO at the time the liability is initially incurred, typically when the asset is acquired or constructed. For Williams’ upstream properties, the ARO is recorded based on Williams’ working interest in the underlying properties. As regulated entities, Transco’s and NWP’s depreciation expense and accretion expense are offset and recorded as a regulatory asset as the regulated entities expect to recover these accretion expenses in future rates and measure changes in the liability due to passage of time by applying an interest rate to the liability balance. This step

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is recognized as an increase in the carrying amount of the liability included in Operating and maintenance expenses and as a corresponding accretion expense included in Other (income) expense - net in the Consolidated Statement of Income. The regulatory asset is amortized commensurate with these regulated entities’ collection of those costs in rates.

Measurements of AROs include, as a component of future expected costs, an estimate of the price that a third party would demand, and could expect to receive, for bearing the uncertainties inherent in the obligations, sometimes referred to as a market-risk premium.

Goodwill

Goodwill included within Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, as of December 31, 2024, represents the excess of the consideration, plus the fair value of any noncontrolling interest or any previously held equity interest, over the fair value of the net assets acquired. It is not subject to amortization but is evaluated annually as of October 1 for impairment or more frequently if impairment indicators are present that would indicate it is more likely than not that the fair value of the reporting unit is less than its carrying amount. Management first performs a qualitative assessment to test goodwill on a reporting unit by reporting unit basis to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, management compares its estimate of fair value of the reporting unit to its carrying amount, including goodwill. Judgments and assumptions are inherent in management’s estimates of fair value.

Other Identifiable Intangible Assets

Williams’ other identifiable intangible assets included within Intangible assets – net of accumulated amortization in the Consolidated Balance Sheet are primarily related to gas gathering, processing, and fractionation customer relationships. Williams’ other identifiable intangible assets are generally amortized on a straight-line basis over the period in which these assets contribute to its cash flows. Williams evaluates these assets for changes in the expected remaining useful lives and reflects any changes prospectively through amortization over the revised remaining useful life.

Impairment of Property, Plant, and Equipment, Intangible Assets, and Investments

Management evaluates property, plant, and equipment and intangible assets for impairment when, in its judgment, events or circumstances, including probable abandonment, indicate that the carrying value of such assets may not be recoverable. When an indicator of impairment has occurred, management compares its estimate of undiscounted future cash flows attributable to the assets to the carrying value of the assets to determine whether an impairment has occurred and may apply a probability-weighted approach to consider the likelihood of different cash flow assumptions and possible outcomes, including selling the assets in the near term or holding them for the asset’s remaining estimated useful life. If an impairment of the carrying value has occurred, management determines the amount of the impairment to be recognized in the financial statements by estimating the fair value of the assets and recording a loss for the amount that the carrying value exceeds the estimated fair value. This evaluation is performed at the lowest level for which separately identifiable cash flows exist.

For assets identified to be disposed of in the future and considered held for sale, management compares the carrying value to the estimated fair value less the cost to sell to determine if recognition of an impairment is required. Until the assets are disposed of, the estimated fair value, which includes estimated cash flows from operations until the assumed date of sale, is recalculated when related events or circumstances change.

Williams’ investments are evaluated for impairment when, in management’s judgment, events or circumstances indicate that the carrying value of such investments may have experienced an other-than-temporary decline in value. When evidence of loss in value has occurred, management compares its estimate of fair value of the investment to the carrying value of the investment to determine whether an impairment has occurred. If the estimated fair value is

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less than the carrying value and management considers the decline in value to be other-than-temporary, the excess of the carrying value over the fair value is recognized in the financial statements as an impairment charge.

Judgment and assumptions are inherent in the estimate of undiscounted future cash flows and an asset’s or investment’s fair value. Additionally, judgment is used to determine the probability of sale with respect to assets considered for disposal.

Equity-Method Investment Basis Differences

Differences between the carrying value of Williams’ equity-method investments and the underlying equity in the net assets of investees are accounted for as if the investees were consolidated subsidiaries. Equity earnings (losses) in the Consolidated Statement of Income includes Williams’ allocable share of net income (loss) of investees adjusted for any depreciation and amortization, as applicable, associated with basis differences.

Leases

Williams, Transco, and NWP recognize operating lease liabilities based on the present value of the future lease payments and have elected to combine lease and nonlease components for all classes of leased assets in the calculation of the lease liability and the offsetting right-of-use asset in the respective Balance Sheets.

Williams’, Transco’s, and NWP’s lease agreements require both fixed and variable periodic payments, with initial terms typically ranging from one year to 20 years for Williams and up to 30 years for Transco and NWP. Payment provisions in certain lease agreements contain escalation factors which may be based on stated rates or a change in a published index at a future time. The amount by which a lease escalates based on the change in a published index, which is not known at lease commencement, is considered a variable payment and is not included in the present value of the future lease payments, which only includes those that are stated or can be calculated based on the lease agreement at lease commencement. In addition to the noncancellable periods, many of Williams’ lease agreements provide for one or more extensions of the lease agreement for periods ranging from one year in length to an indefinite number of times following the specified contract term. Other lease agreements provide for extension terms that allow Williams, Transco, and NWP to utilize the identified leased asset for an indefinite period of time so long as the asset continues to be utilized in its operations. In consideration of these renewal features, management assesses the term of the lease agreements, which includes using judgment in the determination of which renewal periods and termination provisions, when at its sole election, will be reasonably certain of being exercised. Periods after the initial term or extension terms that allow for either party to the lease to cancel the lease are not considered in the assessment of the lease term. Additionally, management has elected to exclude leases with an original term of one year or less, including renewal periods, from the calculation of the lease liability and the offsetting right-of-use asset.

Judgment is used in determining the discount rate upon which the present value of the future lease payments is determined. This rate is based on a collateralized interest rate corresponding to the term of the lease agreement using company, industry, and market information available.

When permitted under its lease agreements, Williams may sublease certain unused office space for fixed periods that could extend up to the length of the original lease agreement.

Pension and Other Postretirement Benefits

The funded status of each of the pension and other postretirement benefit plans is recognized separately in Williams’ Consolidated Balance Sheet as either an asset or liability. The plans’ benefit obligations and net periodic benefit costs (credits) are actuarially determined and impacted by various assumptions and estimates.

The discount rates are determined separately for each of Williams’ pension and other postretirement benefit plans based on an approach specific to Williams’ plans. The year-end discount rates are determined considering a

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yield curve comprised of high-quality corporate bonds and the timing of the expected benefit cash flows of each plan.

The expected long-term rates of return on plan assets are determined by combining a review of the historical returns within the portfolio, the investment strategy included in the plans’ investment policy statement, and capital market projections for the asset classes in which the portfolio is invested, as well as the weighting of each asset class.

Unrecognized actuarial gains and losses are deferred and recorded in AOCI or, for Transco and NWP, as a regulatory asset or liability, until amortized as a component of net periodic benefit cost (credit). The unrecognized net actuarial gains (losses) deferred in AOCI at December 31, 2024 and 2023 were $55 million and ($17) million, respectively. Unrecognized actuarial gains and losses in excess of 10 percent of the greater of the benefit obligation or the market-related value of plan assets are amortized over the participants’ average remaining future years of service, which is approximately 9 years for Williams’ pension plans and approximately 4 years for Williams’ other postretirement benefit plan.

The expected return on plan assets component of net periodic benefit cost (credit) is calculated using the market-related value of plan assets. For Williams’ pension plans, the market-related value of plan assets is equal to the fair value of plan assets adjusted to reflect the amortization of gains or losses associated with the difference between the expected and actual return on plan assets over a 5-year period. Additionally, the market-related value of assets may be no more than 110 percent or less than 90 percent of the fair value of plan assets at the beginning of the year. The market-related value of plan assets for Williams’ other postretirement benefit plan is equal to the unadjusted fair value of plan assets at the beginning of the year.

Contingent Liabilities

Liabilities for loss contingencies, including environmental matters, are recorded when management assesses that a loss is probable and the amount of the loss can be reasonably estimated. These liabilities are calculated based upon management’s assumptions and estimates with respect to the likelihood or amount of loss and upon advice of legal counsel, engineers, or other third parties regarding the probable outcomes of the matters. These calculations are made without consideration of any potential recovery from third parties. Insurance recoveries or reimbursements from others are recognized when realizable. Revisions to these liabilities are generally reflected in income when new or different facts or information become known or circumstances change that affect the previous assumptions or estimates.

Treasury Stock

Treasury stock purchases are accounted for under the cost method whereby the entire cost of the acquired stock is recorded as Treasury stock, at cost in Williams’ Consolidated Balance Sheet. Gains and losses on the subsequent reissuance of shares are credited or charged to Capital in excess of par value in the Consolidated Balance Sheet using the average cost method.

Cash Flows from Operating Activities

Williams, Transco, and NWP use the indirect method to report cash flows from operating activities, which requires adjustments to net income to reconcile to net cash flows provided by operating activities.

Cash Flows from Revolving Credit Facility and Commercial Paper Program

Proceeds and payments related to borrowings under Williams’ revolving credit facility are reflected in the financing activities in the Consolidated Statement of Cash Flows on a gross basis. Proceeds and payments related to borrowings under Williams’ commercial paper program are reflected in the financing activities in the Consolidated Statement of Cash Flows on a net basis, as the outstanding notes generally have maturity dates less than three months from the date of issuance. (See Note 13 – Debt and Banking Arrangements.)

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Accounting Standards Issued But Not Yet Adopted

In December 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2023-09, Income Taxes: Improvements to Income Tax Disclosures, which requires disclosure of specific categories in the rate reconciliation and additional information for reconciling items that meet a quantitative threshold. This ASU is effective for fiscal years beginning after December 15, 2024, and early adoption is permitted. The adoption of ASU 2023-09 is not expected to have a material impact on the financial statements.

In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures, which requires public entities to disclose additional information in the notes to financial statements for certain types of expenses (including purchases of inventory, employee compensation, depreciation, amortization, and depletion) in commonly presented expense captions (such as cost of sales, selling, general & administrative expenses, and research and development). The amendments are effective for annual periods beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027 with early adoption permitted. The impact of this standard is currently being evaluated.

Share Repurchase Program

In September 2021, Williams’ Board of Directors authorized a share repurchase program with a maximum dollar limit of $1.5 billion. Repurchases may be made from time to time in the open market, by block purchases, in privately negotiated transactions, or in such other manner as determined by management. Williams will also determine the timing and amount of any repurchases based on market conditions and other factors. The share repurchase program does not obligate Williams to acquire any particular amount of common stock, and it may be suspended or discontinued at any time. This share repurchase program does not have an expiration date. There were $0 million, $130 million and $9 million of repurchases under the program in 2024, 2023, and 2022, respectively, which are included in the Consolidated Statement of Changes in Equity. Cumulative repurchases to date under the program total $139 million.

Significant Risks and Uncertainties

Management believes that the carrying value of certain of Williams’ property, plant, and equipment and intangible assets, notably certain assets acquired by Williams accounted for as business combinations between 2012 and 2014, may be in excess of current fair value. However, the carrying value of these assets, in management’s judgment, continues to be recoverable. It is reasonably possible that future strategic decisions, including transactions such as monetizing assets or contributing assets to new ventures with third parties, as well as unfavorable changes in expected producer activities, could impact management’s assumptions and ultimately result in impairments of these assets. Such transactions or developments may also indicate that certain Williams’ equity-method investments have experienced other-than-temporary declines in value, which could result in impairment.

Note 2 – Variable Interest Entities

Consolidated VIEs

As of December 31, 2024, Williams consolidated the following VIEs:

Northeast JV

Williams owns a 65 percent interest in the Northeast JV, a subsidiary that is a VIE due to certain voting rights being disproportionate to the obligation to absorb losses and substantially all of the Northeast JV’s activities being performed on Williams’ behalf. Williams is the primary beneficiary because it has the power to direct the activities that most significantly impact the Northeast JV’s economic performance. The Northeast JV provides midstream services for producers in the Marcellus Shale and Utica Shale regions. Future expansion activity is expected to be funded with capital contributions from Williams and the other equity partner on a proportional basis.

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Gulfstar One

Williams owns a 51 percent interest in Gulfstar One, a subsidiary that, due to certain risk-sharing provisions in its customer contracts, is a VIE. Gulfstar One includes a proprietary floating-production system, Gulfstar FPS, and associated pipelines that provide production handling and gathering services in the eastern deepwater Gulf of America. Williams is the primary beneficiary because it has the power to direct the activities that most significantly impact Gulfstar One’s economic performance.

Cardinal

Williams owns a 66 percent interest in Cardinal, a subsidiary that provides gathering services for the Utica Shale region and is a VIE due to certain risks shared with customers. Williams is the primary beneficiary because it has the power to direct the activities that most significantly impact Cardinal’s economic performance. In order to meet contractual gas gathering commitments, Williams may fund more than its proportional share of future expansion activity, which could ultimately impact relative ownership.

The following table presents amounts included in the Consolidated Balance Sheet that are only for the use or obligation of the consolidated VIEs:



	December 31,
	2024		2023
	(Millions)
Assets (liabilities):
Cash and cash equivalents	$	15	$	33
Trade accounts and other receivables – net	178		215
Inventories	5		5
Other current assets and deferred charges	7		4
Property, plant, and equipment – net	4,896		5,046
Intangible assets – net of accumulated amortization	1,940		2,049
Regulatory assets, deferred charges, and other	27		31
Accounts payable	(57)		(109)
Other current liabilities	(29)		(28)

Regulatory liabilities, deferred income, and other	(263)		(268)

Nonconsolidated VIEs

Williams owns certain equity-method investments that are VIEs due primarily to its limited participating rights as a minority equity holder. Williams’ maximum exposure to loss is limited to the carrying value of these investments (included within Investments in the Consolidated Balance Sheet), which totaled $72 million at December 31, 2024.

Note 3 – Acquisitions and Divestitures

Crowheart Acquisition

As of December 31, 2023, Williams had an agreement regarding certain crude oil and natural gas properties in the Wamsutter basin in Wyoming under which it owned a 75 percent undivided interest in each well’s working interest and proportionally consolidated its undivided interest. On November 1, 2024, Williams closed on the acquisition of a third-party operator, Crowheart Energy, LLC, for $307 million cash, subject to working capital and post-closing adjustments (Crowheart Acquisition). After closing on the acquisition, Williams owns more than a 90 percent working interest in each well. The purpose of this acquisition was to consolidate Williams’ interests in the Wamsutter basin and further optimize development in the area to continue to supply its gathering and processing assets. Assets acquired, acquisition-related costs incurred, and results of operations realized are included at Other.

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During the period from the acquisition date of November 1, 2024 to December 31, 2024, the additional interest acquired in the Crowheart Acquisition contributed Revenues of $20 million and Modified EBITDA (as defined in Note 19 – Segment Disclosures) of $7 million.

Williams accounted for the Crowheart Acquisition as a business combination, which requires, among other things, that identifiable assets acquired and liabilities assumed be recognized at their acquisition date fair values.

The following table presents the preliminary allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 1, 2024. The allocation is considered preliminary because the valuation work has not been completed due to the ongoing review of the valuation results and validation of significant inputs and assumptions. Preliminary fair value measurements were made for certain acquired assets and liabilities, primarily property, plant, and equipment, which utilized the income approach for proved developed producing reserves and the market approach for undeveloped reserves; however, adjustments to those measurements may be made in subsequent periods, up to one year from the acquisition date, as new information related to facts and circumstances as of the acquisition date may be identified.


	(Millions)
Cash and cash equivalents	$	94
Other current assets	15
Property, plant, and equipment – net	400
Other noncurrent assets	2
Total assets acquired	511

Current liabilities	(45)
Noncurrent liabilities	(115)
Total liabilities assumed	(160)

Net assets acquired	$	351

Discovery Acquisition

As of December 31, 2023, Williams owned a 60 percent interest in Discovery, which it accounted for as an equity-method investment. On August 1, 2024, Williams closed on the acquisition of the remaining 40 percent interest in Discovery, along with certain other assets, for $170 million cash, subject to working capital and post-closing adjustments (Discovery Acquisition). As a result of acquiring this additional interest, Williams obtained control and subsequently consolidates Discovery. The purpose of this acquisition was to expand Williams’ gathering, processing, and transportation presence in the Gulf of America region. Assets acquired, acquisition-related costs incurred, and results of operations realized are included within Williams’ Transmission & Gulf of America segment.

During the period from the acquisition date of August 1, 2024 to December 31, 2024, the operations acquired in the Discovery Acquisition contributed Revenues of $144 million and Modified EBITDA of $42 million.

Acquisition-related costs for the Discovery Acquisition total $1 million and are included in Selling, general, and administrative expenses in the Williams Consolidated Statement of Income.

Williams accounted for the Discovery Acquisition as a business combination. The book value of its existing equity-method investment prior to the acquisition date of August 1, 2024, was $381 million. Williams recognized a $127 million gain on remeasuring its existing equity-method investment to fair value included in Other investing income (loss) – net in the Williams Consolidated Statement of Income during 2024, which is not included in the pro forma Discovery adjustments below. Williams utilized the income approach to fair value its previous equity-method investment in Discovery.

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The following table presents the preliminary allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at August 1, 2024. The allocation is considered preliminary because the valuation work has not been completed due to the ongoing review of the valuation results and validation of significant inputs and assumptions. Preliminary fair value measurements were made for certain acquired assets and liabilities, primarily property, plant, and equipment, which utilized the cost approach; however, adjustments to those measurements may be made in subsequent periods, up to one year from the acquisition date, as new information related to facts and circumstances as of the acquisition date may be identified.


	(Millions)
Cash and cash equivalents	$	22
Other current assets	19
Property, plant, and equipment – net	941
Other noncurrent assets	39
Total assets acquired	1,021

Current liabilities	(40)
Noncurrent liabilities	(296)
Total liabilities assumed	(336)

Net assets acquired	$	685

Gulf Coast Storage Acquisition

On January 3, 2024, Williams closed on the acquisition from Hartree Partners LP for $1.95 billion of 100 percent of a strategic portfolio of natural gas storage facilities and pipelines, located in Louisiana and Mississippi (Gulf Coast Storage Acquisition). The purpose of this acquisition was to expand Williams’ natural gas storage footprint in the Gulf Coast region. Assets acquired, acquisition-related costs incurred, and results of operations realized are included within Williams’ Transmission & Gulf of America segment. The Gulf Coast Storage Acquisition was funded with cash on hand and $100 million of deferred consideration that did not accrue interest and was payable one year from the acquisition date. The obligation is presented within Long-term debt due within one year in the Williams Consolidated Balance Sheet as of December 31, 2024, owed by Williams’ wholly owned subsidiary Williams Field Services Group, LLC. On January 3, 2025, Williams paid the remaining $100 million of the Gulf Coast Storage Acquisition purchase price obligation.

During the period from the acquisition date of January 3, 2024 to December 31, 2024, the operations acquired in the Gulf Coast Storage Acquisition contributed Revenues of $228 million and Modified EBITDA of $160 million, which is impacted by acquisition-related costs. Acquisition-related costs for the Gulf Coast Storage Acquisition total $15 million, including $14 million incurred in 2024, and are included in Selling, general, and administrative expenses in the Williams Consolidated Statement of Income.

Williams accounted for the Gulf Coast Storage Acquisition as a business combination. The valuation technique used consisted of the cost approach for property, plant, and equipment.

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The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at January 3, 2024.


	(Millions)
Cash and cash equivalents	$	46
Other current assets	18
Property, plant, and equipment – net	2,035
Other noncurrent assets	2
Total assets acquired	2,101

Current liabilities	(11)
Noncurrent liabilities	(107)
Total liabilities assumed	(118)

Net assets acquired	$	1,983

DJ Basin Acquisitions

Cureton Acquisition

On November 30, 2023, Williams closed on the acquisition of 100 percent of Cureton Front Range, LLC (Cureton Acquisition), whose operations are located in the DJ Basin, for $546 million. The purpose of this acquisition was to expand Williams’ gathering and processing footprint and create operational synergies for its operations in the DJ Basin. Assets acquired, acquisition-related costs incurred, and results of operations realized are included within Williams’ West segment. The Cureton Acquisition was funded with cash on hand.

During the period from the acquisition date of November 30, 2023 to December 31, 2023, the operations acquired in the Cureton Acquisition contributed Revenues of $35 million and Modified EBITDA of $7 million.

Acquisition-related costs for the Cureton Acquisition total $8 million, including $6 million incurred in 2023, and are included in Selling, general, and administrative expenses in the Williams Consolidated Statement of Income.

Williams accounted for the Cureton Acquisition as a business combination. The valuation techniques used consisted of the cost approach for property, plant, and equipment and the income approach for valuation of other intangible assets.

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The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 30, 2023.


	(Millions)
Cash and cash equivalents	$	6
Other current assets	21
Property, plant, and equipment – net	433
Intangible assets – net of accumulated amortization	117
Other noncurrent assets	1
Total identifiable assets acquired	578

Current liabilities	(29)
Noncurrent liabilities	(14)
Total liabilities assumed	(43)

Net identifiable assets acquired	535

Goodwill included in Intangible assets – net of accumulated amortization	11
Net assets acquired	$	546

Other intangible assets recognized in the Cureton Acquisition are related to contractual customer relationships from gas gathering and processing agreements with customers. The basis for determining the value of these intangible assets is estimated future net cash flows to be derived from acquired contractual customer relationships discounted using a risk-adjusted discount rate. These intangible assets are being amortized on a straight-line basis over an initial period of 20 years which represents the term over which the contractual customer relationships are expected to contribute to Williams’ cash flows. Approximately 24 percent of the expected future revenues from these contractual customer relationships are impacted by Williams’ ability and intent to renew or renegotiate existing customer contracts. Williams expenses costs incurred to renew or extend the terms of its gas gathering contracts with customers. Based on the estimated future revenues during the current contract periods (as estimated at the time of the acquisition), the weighted-average period prior to the next renewal or extension of the existing contractual customer relationships is approximately 10 years. See Note 11 – Goodwill and Other Intangible Assets.

RMM Acquisition

As of December 31, 2022, Williams owned a 50 percent interest in RMM which it accounted for as an equity-method investment. On November 30, 2023, Williams closed on the acquisition of the remaining 50 percent interest in RMM (RMM Acquisition) for $704 million. As a result of acquiring this additional interest, Williams obtained control and subsequently consolidates RMM. The purpose of this acquisition was to expand Williams’ gathering and processing footprint and create operational synergies for its operations in the DJ Basin. Assets acquired and results of operations realized are included within Williams’ West segment. Substantially all of the RMM purchase price was not due to the seller until the first quarter of 2025, would not accrue interest until November 2, 2024, and could be repaid early without penalty. It was recorded as a deferred consideration obligation at fair value using an income approach, which resulted in a discount to the contractual amount due which was imputed as interest expense over the term of the obligation. On November 1, 2024, Williams paid the remaining $651 million of the RMM purchase price obligation.

During the period from the acquisition date of November 30, 2023 to December 31, 2023, RMM contributed Revenues of $53 million and Modified EBITDA of $12 million.

Williams accounted for the RMM Acquisition as a business combination. The book value of Williams’ existing equity-method investment prior to the acquisition date of November 30, 2023, was $406 million. Williams recognized a $30 million gain on remeasuring its existing equity-method investment to fair value included in Other investing income (loss) – net in the Williams Consolidated Statement of Income during the fourth quarter of 2023,

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which is not included in the pro forma DJ Basin adjustments below. The valuation techniques used consisted of the income approach for Williams’ previous equity-method investment in RMM and the valuation of other intangible assets, and the cost approach for property, plant, and equipment.

The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 30, 2023. The net assets acquired primarily reflect the noncash consideration transferred, which includes the fair value of both Williams’ previous equity-method investment and the deferred consideration obligation.


	(Millions)
Cash and cash equivalents	$	28
Other current assets	4
Investments	20
Property, plant, and equipment – net	1,041
Intangible assets – net of accumulated amortization	63
Other noncurrent assets	12
Total identifiable assets acquired	1,168

Current liabilities	(44)
Noncurrent liabilities	(103)
Total liabilities assumed	(147)

Net identifiable assets acquired	1,021

Goodwill included in Intangible assets – net of accumulated amortization	55
Net assets acquired	$	1,076

Goodwill recognized in the RMM Acquisition relates primarily to enhancing and diversifying Williams’ basin positions as well as delivering operational synergies, including increasing volumes on its existing processing facilities and increasing revenues on its NGL transportation, fractionation, and storage assets, and is reported within Williams’ West segment. Substantially all of the goodwill is deductible for tax purposes.

Other intangible assets recognized in the RMM Acquisition are related to contractual customer relationships from gas gathering and processing agreements with customers. The basis for determining the value of these intangible assets is estimated future net cash flows to be derived from acquired contractual customer relationships discounted using a risk-adjusted discount rate. These intangible assets are being amortized on a straight-line basis over an initial period of 20 years which represents the term over which the contractual customer relationships are expected to contribute to Williams’ cash flows. Approximately 18 percent of the expected future revenues from these contractual customer relationships are impacted by Williams’ ability and intent to renew or renegotiate existing customer contracts. Williams expenses costs incurred to renew or extend the terms of its gas gathering contracts with customers. Based on the estimated future revenues during the current contract periods (as estimated at the time of the acquisition), the weighted-average period prior to the next renewal or extension of the existing contractual customer relationships is approximately 10 years. See Note 11 – Goodwill and Other Intangible Assets.

MountainWest Acquisition

On February 14, 2023, Williams closed on the acquisition of 100 percent of MountainWest, which includes FERC-regulated interstate natural gas pipeline systems and natural gas storage capacity (MountainWest Acquisition), for $1.08 billion of cash, funded with available sources of short-term liquidity, and retaining $430 million outstanding principal amount of MountainWest long-term debt. For 2023, $1.024 billion is presented in Purchases of businesses, net of cash acquired in the Williams Consolidated Statement of Cash Flows reflecting the cash purchase price, reduced for post-closing adjustments and the cash acquired as presented in the purchase price

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allocation. The purpose of the MountainWest Acquisition was to expand Williams’ existing transmission and storage infrastructure footprint into major markets in Utah, Wyoming, and Colorado. Assets acquired, acquisition-related costs incurred, and results of operations realized are included within Williams’ Transmission & Gulf of America segment.

During the period from the acquisition date of February 14, 2023 to December 31, 2023, the operations acquired in the MountainWest Acquisition contributed Revenues of $225 million and Modified EBITDA of $122 million, which includes $27 million of transition-related costs.

Acquisition-related costs for the MountainWest Acquisition total $18 million, including $16 million incurred in 2023, and are included in Selling, general, and administrative expenses in the Williams Consolidated Statement of Income.

Williams accounted for the MountainWest Acquisition as a business combination. The valuation techniques used consisted of the cost approach for nonregulated property, plant, and equipment, as well as the market approach for the assumed long-term debt consistent with the valuation technique discussed in Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk. MountainWest’s regulated operations are accounted for pursuant to ASC 980. The fair value of assets and liabilities subject to rate making and cost recovery provisions were determined utilizing the income approach. MountainWest’s expected return on rate base is consistent with expected returns of similarly situated assets, resulting in carryover basis of these assets and liabilities equaling their fair value.

The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at February 14, 2023. The fair value of accounts receivable acquired equals contractual amounts receivable.


	(Millions)
Cash and cash equivalents	$	23
Trade accounts and other receivables	33
Other current assets	26
Investments	20
Property, plant, and equipment – net	1,019
Other noncurrent assets	33
Total identifiable assets acquired	1,154

Current liabilities	(47)
Long-term debt	(365)
Other noncurrent liabilities	(95)
Total liabilities assumed	(507)

Net identifiable assets acquired	647

Goodwill included in Intangible assets – net of accumulated amortization	400
Net assets acquired	$	1,047

Goodwill recognized in the MountainWest Acquisition relates primarily to enhancing and diversifying Williams’ basin positions and the long-term value associated with rate regulated businesses and is reported within its Transmission & Gulf of America segment. Substantially all of the goodwill is deductible for tax purposes.

Trace Acquisition

On April 29, 2022, Williams closed on the acquisition of 100 percent of Gemini Arklatex, LLC through which it acquired the Haynesville Shale region gas gathering and related assets of Trace Midstream for $972 million of cash

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funded with cash on hand and proceeds from issuance of commercial paper (Trace Acquisition). The purpose of the Trace Acquisition was to expand Williams’ footprint into the east Texas area of the Haynesville Shale region, increasing in-basin scale in one of the largest growth basins in the country. Assets acquired, acquisition-related costs incurred, and results of operations realized are included within Williams’ West segment.

During the period from the acquisition date of April 29, 2022 to December 31, 2022, the operations acquired in the Trace Acquisition contributed Revenues of $148 million and Modified EBITDA of $73 million.

Acquisition-related costs for the Trace Acquisition of $8 million were included in Selling, general, and administrative expenses in the Williams Consolidated Statement of Income during 2022.

Williams accounted for the Trace Acquisition as a business combination. The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at April 29, 2022. The valuation techniques used consisted of the income approach for valuation of intangible assets and the cost approach for property, plant, and equipment.


	(Millions)
Cash and cash equivalents	$	39
Trade accounts and other receivables	18
Property, plant, and equipment – net	448
Intangible assets – net of accumulated amortization	472
Other noncurrent assets	20
Total assets acquired	997

Accounts payable	(12)
Other current liabilities	(5)
Other noncurrent liabilities	(8)
Total liabilities assumed	(25)

Net assets acquired	$	972

Other intangible assets recognized in the Trace Acquisition are related to contractual customer relationships from gas gathering agreements with customers. The basis for determining the value of these intangible assets is estimated future net cash flows to be derived from acquired contractual customer relationships discounted using a risk-adjusted discount rate. These intangible assets are being amortized on a straight-line basis over an initial period of 20 years which represents the term over which the contractual customer relationships are expected to contribute to Williams’ cash flows. Approximately 2 percent of the expected future revenues from these contractual customer relationships are impacted by Williams’ ability and intent to renew or renegotiate existing customer contracts. Williams expenses costs incurred to renew or extend the terms of its gas gathering contracts with customers. Based on the estimated future revenues during the current contract periods (as estimated at the time of the acquisition), the weighted-average period prior to the next renewal or extension of the existing contractual customer relationships is approximately 19 years. See Note 11 – Goodwill and Other Intangible Assets.

Supplemental Pro Forma

The following pro forma Revenues and Net income (loss) attributable to The Williams Companies, Inc. for 2024, 2023, and 2022, are presented as if the Crowheart Acquisition, Discovery Acquisition, and Gulf Coast Storage Acquisition had been completed on January 1, 2023, the DJ Basin Acquisitions and MountainWest Acquisition had been completed on January 1, 2022, and the Trace Acquisition had been completed on January 1, 2021. These pro forma amounts are not necessarily indicative of what the actual results would have been if the acquisitions had in fact occurred on the dates or for the periods indicated, nor do they purport to project Revenues or Net income (loss) attributable to The Williams Companies, Inc. for any future periods or as of any date. These amounts do not give

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effect to any potential cost savings, operating synergies, or revenue enhancements to result from the transactions or the potential costs to achieve these cost savings, operating synergies, and revenue enhancements.














	Year Ended December 31, 2024
	As Reported		Pro Forma Crowheart (1)		Pro Forma Discovery (1)								Pro Forma Combined
	(Millions)
Revenues	$	10,503	$	60	$	58							$	10,621
Net income (loss) attributable to The Williams Companies, Inc.	2,225		8		(5)								2,228

	Year Ended December 31, 2023
	As Reported		Pro Forma Crowheart		Pro Forma Discovery		Pro Forma Gulf Coast Storage		Pro Forma DJ Basin (1)		Pro Forma MountainWest (1)		Pro Forma Combined
	(Millions)
Revenues	$	10,907	$	74	$	129	$	202	$	270	$	35	$	11,617
Net income (loss) attributable to The Williams Companies, Inc.	3,179		19		(1)		53		17		6		3,273

	Year Ended December 31, 2022
	As Reported						Pro Forma DJ Basin		Pro Forma MountainWest		Pro Forma Trace (1)		Pro Forma Combined
	(Millions)
Revenues	$	10,965					$	218	$	265	$	45	$	11,493
Net income (loss) attributable to The Williams Companies, Inc.	2,049						13		170		18		2,250

(1)Excludes results from operations acquired in the acquisition for the period beginning on the acquisition date, as these results are included in the amounts as reported.

NorTex Asset Purchase

On August 31, 2022, Williams purchased a group of assets in north Texas, primarily natural gas storage facilities and pipelines, from NorTex Midstream Holdings, LLC (NorTex Asset Purchase) for approximately $424 million. These assets are included in Williams’ Transmission & Gulf of America segment.

Sale of Certain Gulf Coast Liquids Pipelines

On September 29, 2023, Williams completed the sale of various petrochemical and feedstock pipelines and associated contracts in the Gulf Coast region for $348 million. As a result of this sale, Williams recorded a gain of $129 million in 2023 in its Transmission & Gulf of America segment. The gain is reflected in Gain on sale of business in the Williams Consolidated Statement of Income. The results of operations for this disposal group, excluding the gain noted, were not significant for the reporting periods.

Note 4 – Related Party Transactions

Williams

Transactions with Equity-Method Investees

Williams has costs and expenses associated with its equity-method investees of $266 million, $776 million, and $1.3 billion for 2024, 2023, and 2022, respectively in its Consolidated Statement of Income. Substantially all of

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these expenses are included in Product costs. Williams also has revenue from its equity-method investees of $2 million, $5 million, and $76 million for 2024, 2023, and 2022, respectively. In addition, Williams has $1 million and $2 million included in Trade accounts and other receivables and $19 million and $33 million included in Accounts payable in its Consolidated Balance Sheet with its equity-method investees at December 31, 2024 and 2023, respectively.

Williams has operating agreements with certain equity-method investees. These operating agreements typically provide for reimbursement or payment to Williams for certain direct operational payroll and employee benefit costs, materials, supplies, and other charges and also for management services. The total charges to equity-method investees for these fees are $52 million, $64 million, and $65 million for 2024, 2023, and 2022, respectively.

Board of Directors

Two members of Williams’ Board of Directors are also executive officers at certain of its counterparties. Williams recorded $59 million, $90 million, and $180 million in Product sales and $40 million, $25 million, and $86 million in Product costs in its Consolidated Statement of Income from these companies for the purchase and sale of natural gas for 2024, 2023, and 2022, respectively.

Transco and NWP Affiliate Transactions

Benefit Plans

Transco and NWP do not have employees. Certain of the costs charged to them by Williams associated with employees who directly support them are described below. Additionally, allocated corporate expenses from Williams also include amounts related to these same employee benefits, which are not included in the amounts presented immediately below.

Pension and Other Postretirement Benefit Plans

Williams’ pension and other postretirement benefit plans are single-employer plans. However, Transco and NWP follow multiemployer plan accounting whereby the amount charged to them and thus paid by them, is based on their share of net periodic benefit cost (see Note 7 – Employee Benefit Plans).

Pension costs charged to Transco by Williams were $1 million, $2 million, and $4 million for 2024, 2023, and 2022, respectively. NWP received pension credits from Williams of $1 million in 2024, $0 million in 2023, and pension charges of $1 million in 2022.

Williams makes annual cash contributions to the pension plans, based on annual actuarial estimates, which Transco recovers through rates that are set through periodic general rate filings. Effective with Transco’s Docket No. RP18-1126 rate case settlement, any amounts of annual contributions that fall below a threshold are recorded as adjustments to income and refunded through future rate adjustments. The amounts of deferred pension collections recorded as regulatory liabilities at December 31, 2024 and 2023 were $30 million and $26 million, respectively. Also effective with Transco’s Docket No. RP18-1126 rate case settlement, the pension regulatory liability as of March 1, 2019 was amortized over a five-year period, and the amortization was completed in February 2024.

Transco recognized other postretirement benefit income of $8 million, $6 million, and $5 million for 2024, 2023, and 2022, respectively, while NWP recognized other postretirement benefit income of $1 million, $0 million, and $1 million, respectively for the same periods. These credits were recorded as regulatory liabilities.

Transco and NWP have been allowed by rate case settlements to collect or refund in future rates any differences between the actuarially determined costs and amounts currently being recovered in rates related to other postretirement benefits. Any differences between the annual actuarially determined cost and amounts currently being recovered in rates are recorded as regulatory assets or liabilities and collected or refunded through future rate

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adjustments. The amounts of other postretirement benefits costs deferred as regulatory liabilities at December 31, 2024 and 2023 are $31 million and $31 million, for Transco respectively, and $43 million and $42 million, for NWP respectively. Effective with the Docket No. RP18-1126 rate case settlement, Transco’s other postretirement benefits regulatory liability as of March 1, 2019 was amortized over a period of approximately five years, and the amortization was completed in July 2024.

Defined Contribution Plan

Williams maintains a defined contribution plan for substantially all of its employees. Williams charged Transco compensation expense of $13 million, $12 million, and $11 million in 2024, 2023, and 2022, respectively, and charged NWP compensation expense of $3 million, $3 million, and $3 million in 2024, 2023, and 2022, respectively, for Williams’ company contributions to this plan.

Employee Stock-Based Compensation Plan Information (see Note 15 – Equity-Based Compensation)

Williams currently bills Transco and NWP directly for compensation expense related to stock-based compensation awards based on the fair value of the awards. Transco and NWP are also billed for their proportionate share of Williams’ and other affiliates’ stock-based compensation expense through various allocation processes.

Total stock-based compensation expense for the years ended December 31, 2024, 2023, and 2022 was $6 million, $6 million, and $6 million, for Transco respectively, and $2 million, $2 million, and $1 million, for NWP respectively.

Cash Management Program

Transco and NWP are participants in Williams’ cash management program, and thus make advances to and receive advances from Williams. At December 31, 2024 and 2023, Transco’s advances to Williams totaled approximately $638 million and $1.4 billion, respectively. These advances are represented by demand notes and are classified as Trade accounts and other receivables - Advances to affiliate in the Balance Sheet. NWP’s advances from Williams totaled approximately $26 million at December 31, 2024. These advances from Williams are classified as Payables - Advances from affiliate. Advances to Williams from NWP totaled approximately $158 million at December 31, 2023. These advances are represented by demand notes and are classified as Trade accounts and other receivables - Advances to affiliate in the Balance Sheet. Advances are stated at the historical carrying amounts. Interest expense and income are recognized when earned and the collectability is reasonably assured. The interest rate on these intercompany demand notes is based upon the daily overnight investment rate paid on Williams’ excess cash at the end of each month, which was approximately 4 percent at December 31, 2024. The net interest income from these advances was $51 million, $81 million, and $31 million during years ended December 31, 2024, 2023, and 2022, for Transco respectively, and $5 million, $8 million, and $5 million for the years ended December 31, 2024, 2023, and 2022 for NWP respectively. Such interest income is included in Interest income in the Statement of Net Income for Transco and Other income (expense) – net in the Statement of Net Income for NWP.

Other Affiliate Transactions

Included in Transco’s Total revenues in the Statement of Net Income for 2024, 2023, and 2022 are revenues received from affiliates of $76 million, $56 million, and $89 million, respectively.

Included in Transco’s Natural gas product costs in the Statement of Net Income for 2024, 2023, and 2022 are costs of gas purchased from affiliates of $5 million, $7 million, and $18 million, respectively. All gas purchases are made at market or contract prices.

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Services necessary to operate Transco and NWP are provided by Williams and certain affiliates of Williams. Transco and NWP reimburse Williams and its affiliates for all direct and indirect expenses incurred or payments made (including salary, bonus, incentive compensation, and benefits) in connection with these services. Employees of Williams also provide general, administrative, and management services, and Transco and NWP are charged for certain administrative expenses incurred by Williams. These charges are either directly assigned or allocated. Allocated charges are specific or general. Specific allocations are based on a relationship with the delivery of services and general allocations are based on a three-factor formula, which considers revenues; property, plant, and equipment; and payroll. In management’s estimation, the allocation methodologies used are reasonable and result in a reasonable allocation of costs of doing business incurred by Williams. For the years ended December 31, 2024, 2023, and 2022, Transco has recorded $344 million, $324 million, and $345 million, respectively, and NWP has recorded $91 million, $86 million, and $88 million, respectively, for these service expenses, which are primarily included in Operating and maintenance expenses and Selling, general, and administrative expenses in the Statement of Net Income.

Transco provides services to certain of its affiliates. Transco recorded reductions in operating expenses for services provided to and reimbursed by affiliates of $6 million, $14 million, and $10 million for the years ended December 31, 2024, 2023, and 2022, respectively.

During January 2025, Transco and NWP declared and paid cash distributions of $246 million and $24 million, respectively, to Williams, and Williams made a cash contribution to NWP of $85 million.

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Note 5 – Revenue Recognition

Revenue by Category

The following table presents Williams’ revenue disaggregated by major service line:


	Transmission & Gulf of America		Northeast G&P		West		Gas & NGL Marketing Services		Other		Eliminations		Total
	(Millions)






























2024
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage	$	3,500	$	—	$	—	$	—	$	—	$	(81)	$	3,419
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration	661		1,778		1,693		—		—		(162)		3,970
Commodity consideration	54		2		78		—		—		—		134
Other	46		92		21		—		—		(19)		140
Total service revenues	4,261		1,872		1,792		—		—		(262)		7,663
Product sales	328		110		869		4,530		420		(1,288)		4,969
Total revenues from contracts with customers	4,589		1,982		2,661		4,530		420		(1,550)		12,632
Other revenues (1)	39		43		8		2,236		24		(2)		2,348
Other adjustments (2)	—		—		—		(4,977)		—		500		(4,477)
Total revenues	$	4,628	$	2,025	$	2,669	$	1,789	$	444	$	(1,052)	$	10,503

2023
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage	$	3,334	$	—	$	—	$	—	$	—	$	(60)	$	3,274
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration	443		1,782		1,478		—		—		(170)		3,533
Commodity consideration	38		5		103		—		—		—		146
Other	30		87		12		1		—		(15)		115
Total service revenues	3,845		1,874		1,593		1		—		(245)		7,068
Product sales	252		132		441		4,615		442		(954)		4,928
Total revenues from contracts with customers	4,097		2,006		2,034		4,616		442		(1,199)		11,996
Other revenues (1)	53		27		101		4,294		64		(2)		4,537
Other adjustments (2)	—		—		—		(6,032)		—		406		(5,626)
Total revenues	$	4,150	$	2,033	$	2,135	$	2,878	$	506	$	(795)	$	10,907

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	Transmission & Gulf of America		Northeast G&P		West		Gas & NGL Marketing Services		Other		Eliminations		Total
	(Millions)
2022
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage	$	3,139	$	—	$	—	$	—	$	—	$	(72)	$	3,067
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration	381		1,526		1,518		—		—		(167)		3,258
Commodity consideration	64		14		182		—		—		—		260
Other	21		102		12		3		—		(16)		122
Total service revenues	3,605		1,642		1,712		3		—		(255)		6,707
Product sales	404		134		841		10,768		706		(1,787)		11,066
Total revenues from contracts with customers	4,009		1,776		2,553		10,771		706		(2,042)		17,773
Other revenues (1)	38		26		8		7,929		(55)		(11)		7,935
Other adjustments (2)	—		—		—		(15,467)		—		724		(14,743)
Total revenues	$	4,047	$	1,802	$	2,561	$	3,233	$	651	$	(1,329)	$	10,965

______________________________

(1)Revenues not derived from contracts with customers primarily consist of physical product sales related to commodity derivative contracts, realized and unrealized gains and losses associated with Williams’ commodity derivative contracts, which are reported in Net gain (loss) from commodity derivatives in the Consolidated Statement of Income, management fees received for certain services provided to operated equity-method investments, and leasing revenues associated with the Williams headquarters building.

(2)Other adjustments reflect certain costs of Gas & NGL Marketing Services’ risk management activities. As Williams is acting as agent for natural gas marketing customers or engages in energy trading activities, the resulting revenues are presented net of the related costs of those activities in the Consolidated Statement of Income.

For Transco and NWP, revenue disaggregation by major service line includes Natural gas transportation, Natural gas storage, Natural gas product sales, and Other, which are separately presented on their Statements of Net Income.

Contract Assets

The following tables present a reconciliation of contract assets:

Williams


	Year Ended December 31,
		2024		2023
		(Millions)
Balance at beginning of year		$	36	$	29
Revenue recognized in excess of amounts invoiced		170		183
Minimum volume commitments invoiced		(144)		(176)
Contract assets acquired		36		—
Balance at end of year		$	98	$	36

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Transco


	Year Ended December 31,
		2024		2023
		(Millions)
Balance at beginning of year		$	—	$	—
Revenue recognized in excess of amounts invoiced		10		—


Balance at end of year		$	10	$	—

NWP


		Year Ended December 31,
			2024		2023
	(Millions)
Balance at beginning of year			$	17	$	13
Revenue recognized in excess of amounts invoiced			6		6
Amortization of contract assets			(2)		(2)

Balance at end of year			$	21	$	17

Contract Liabilities

The following tables present a reconciliation of contract liabilities:

Williams


	Year Ended December 31,
		2024		2023
		(Millions)
Balance at beginning of year		$	1,081	$	1,043
Payments received and deferred		183		190
Significant financing component		8		9
Contract liability acquired (disposed) – net		53		115
Recognized in revenue		(279)		(276)
Balance at end of year		$	1,046	$	1,081

Transco


	Year Ended December 31,
		2024		2023
		(Millions)
Balance at beginning of year		$	184	$	194


Recognized in revenue		(11)		(10)
Balance at end of year		$	173	$	184

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NWP


	Year Ended December 31,
		2024		2023
		(Millions)
Balance at beginning of year		$	2	$	3


Recognized in revenue		(2)		(1)
Balance at end of year		$	—	$	2

Remaining Performance Obligations

Remaining performance obligations primarily include reservation charges on contracted capacity for Williams’ gas pipeline firm transportation contracts with customers, storage capacity contracts, long-term contracts containing MVC associated with midstream businesses, and fixed payments associated with offshore production handling. For Williams’ interstate natural gas pipeline businesses, including Transco and NWP, remaining performance obligations reflect the rates for such services in its current effective FERC tariffs for the life of the related contracts; however, these rates may change based on future tariffs approved by the FERC and the amount and timing of these changes are not currently known.

Remaining performance obligations exclude variable consideration, including contracts with variable consideration for which it has elected the practical expedient for consideration recognized in revenue as billed. Certain of its contracts contain evergreen and other renewal provisions for periods beyond the initial term of the contract. The remaining performance obligation amounts as of December 31, 2024, do not consider potential future performance obligations for which the renewal has not been exercised and exclude contracts with customers for which the underlying facilities have not received FERC authorization to be placed into service. Consideration received prior to December 31, 2024, that will be recognized in future periods is also excluded from its remaining performance obligations and is instead reflected in contract liabilities.

The following tables present the amount of the contract liabilities balance expected to be recognized as revenue when performance obligations are satisfied and the transaction price allocated to the remaining performance obligations under certain contracts as of December 31, 2024.

Williams


	Contract Liabilities		Remaining Performance Obligations
	(Millions)
2025 (one year)	$	173	$	4,132
2026 (one year)	146		3,860
2027 (one year)	141		3,623
2028 (one year)	118		2,778
2029 (one year)	100		2,564
Thereafter	368		14,102
Total	$	1,046	$	31,059

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Transco


	Contract Liabilities		Remaining Performance Obligations
	(Millions)
2025 (one year)	$	10	$	2,726
2026 (one year)	10		2,536
2027 (one year)	11		2,438
2028 (one year)	11		1,784
2029 (one year)	11		1,693
Thereafter	120		10,421
Total	$	173	$	21,598

NWP


	Contract Liabilities		Remaining Performance Obligations
	(Millions)
2025 (one year)	$	—	$	391
2026 (one year)	—		386
2027 (one year)	—		373
2028 (one year)	—		368
2029 (one year)	—		349
Thereafter	—		2,234
Total	$	—	$	4,101

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Note 6 – Provision (Benefit) for Income Taxes

The Provision (benefit) for income taxes from continuing operations includes:


	Year Ended December 31,
		2024		2023		2022
		(Millions)
Current:
Federal		$	125	$	3	$	(25)
State		9		21		19

		134		24		(6)
Deferred:
Federal		472		872		424
State		34		109		7

		506		981		431
Provision (benefit) for income taxes		$	640	$	1,005	$	425

Reconciliations from the Provision (benefit) at statutory rate from continuing operations to recorded Provision (benefit) for income taxes are as follows:


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Provision (benefit) at statutory rate	$	627	$	925	$	534
Increases (decreases) in taxes resulting from:
State income taxes (net of federal benefit)	79		129		113
State deferred income tax rate change	(44)		(25)		(92)
Federal valuation allowance	—		—		(70)
Federal settlements	—		—		(45)
Impact of nontaxable noncontrolling interests	(25)		(26)		(14)
Other – net	3		2		(1)
Provision (benefit) for income taxes	$	640	$	1,005	$	425

The State deferred income tax rate change benefit of $44 million, $25 million and $92 million in 2024, 2023 and 2022, respectively, is related to a decrease in Williams’ estimate of the deferred state income tax rate (net of federal effect). The 2024 benefit is driven primarily by a decrease in the Louisiana state income tax rate and the enacted decline in the Pennsylvania state income tax rate over the next several years.

During the course of audits of its business by domestic and foreign tax authorities, Williams frequently faces challenges regarding the amount of taxes due. These challenges include questions regarding the timing and amount of deductions and the allocation of income among various tax jurisdictions. In evaluating the liability associated with its various filing positions, Williams applies the two-step process of recognition and measurement. In association with this liability, Williams records an estimate of related interest and tax exposure as a component of its tax provision. The impact of this accrual is included within Other – net in its reconciliation of the Provision (benefit) at statutory rate to recorded Provision (benefit) for income taxes.

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Significant components of Deferred income tax liabilities are as follows:


	December 31,
	2024		2023
	(Millions)
Gross deferred income tax liabilities:
Property, plant and equipment	$	4,501	$	3,541
Investments	1,733		1,740
Other	193		146
Total gross deferred income tax liabilities	6,427		5,427
Gross deferred income tax assets:
Accrued liabilities	1,146		868
Corporate alternative minimum tax credits	108		—
Foreign tax credits	—		35
Federal loss carryovers	325		398
Disallowed business interest expense carryforward	247		67
State losses and credits	224		293
Other	92		103
Total gross deferred income tax assets	2,142		1,764
Less valuation allowance	91		183
Net deferred income tax assets	2,051		1,581
Deferred income tax liabilities	$	4,376	$	3,846

The valuation allowance at December 31, 2024 and 2023 serves to reduce the available deferred income tax assets to an amount that will, more likely than not, be realized. Williams considered all available positive and negative evidence, which incorporates available tax planning strategies, and management’s estimate of future reversals of existing taxable temporary differences and has determined that a portion of its deferred income tax assets related to State losses and credits may not be realized. The change from prior year for the Foreign tax credits reflects a decrease of $35 million due to its expiration in 2024. The amounts presented in the table above are, with respect to state items, before any federal benefit. The change from prior year for the State losses and credits reflects increases in losses and credits generated in the current and prior years less losses and/or credits utilized in the current year. Williams has loss and credit carryovers in multiple state taxing jurisdictions. These attributes generally expire between 2025 and 2043 with some carryovers having indefinite carryforward periods.

Federal loss carryovers at December 31, 2024 reflect deferred tax assets on net operating loss carryovers with no expiration date.

Disallowed business interest expense carryforward reflects Williams’ federal interest expense carryforward which has no expiration date.

Cash payments for income taxes (net of refunds) were $68 million, $31 million and $13 million in 2024, 2023 and 2022 respectively.

During the second quarter of 2022, Williams finalized settlements for 2011 through 2014 on certain contested matters with the Internal Revenue Service (IRS) that resulted in a 2022 year-to-date tax benefit of approximately $45 million and Williams received cash refunds totaling $7 million. During the fourth quarter of 2023, Williams closed the audit for 2018 and made a $5 million payment.

Williams recognizes related interest and penalties as a component of Provision (benefit) for income taxes. There were no significant interest and penalties recognized for any period presented. There were no interest or penalties relating to uncertain tax positions accrued as of December 31, 2024 and December 31, 2023.

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Consolidated U.S. Federal income tax returns are open to IRS examination for tax years after 2020. The statute of limitations for most states expires one year after expiration of the IRS statute.

Note 7 – Employee Benefit Plans

Pension Plans

Williams has noncontributory defined benefit pension plans for eligible employees hired prior to January 1, 2019. Eligible employees earn compensation credits based on a cash balance formula. As of January 1, 2020, certain active employees are no longer eligible to receive compensation credits.

Other Postretirement Benefits

Williams provides subsidized retiree medical benefits to a closed group of participants as well as retiree life insurance benefits to eligible participants. Medical benefits for Medicare eligible participants are paid through contributions to health reimbursement accounts. Benefits for all other participants are provided through a self-insured medical plan, which includes participant contributions and contains other cost-sharing features such as deductibles, co-payments, and co-insurance.

Defined Contribution Plan

Williams has a defined contribution plan for the benefit of substantially all employees. Plan participants may contribute a portion of their compensation on a pre-tax or after-tax basis. Generally, Williams matches employee contributions up to 6 percent of eligible compensation. Additionally, eligible active employees that do not receive compensation credits under the defined benefit pension plan are eligible for an additional annual fixed-percentage contribution made by Williams to the defined contribution plan. Williams’ contributions charged to expense were $69 million in 2024, $60 million in 2023, and $53 million in 2022.

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Notes (Continued)

Funded Status

The following table presents the changes in benefit obligations and plan assets for pension benefits and other postretirement benefits for the years indicated:


	Pension Benefits				Other Postretirement Benefits
	2024		2023		2024		2023
	(Millions)
Change in benefit obligation:
Benefit obligation at beginning of year	$	1,006	$	940	$	145	$	152
Service cost	25		23		1		1
Interest cost	47		46		7		7
Plan participants’ contributions	—		—		2		2
Benefits paid	(73)		(71)		(11)		(13)
Net actuarial loss (gain) (1)	(65)		68		(12)		(4)
Settlements	(3)		—		—		—
Net increase (decrease) in benefit obligation	(69)		66		(13)		(7)
Benefit obligation at end of year	937		1,006		132		145
Change in plan assets:
Fair value of plan assets at beginning of year	1,167		1,117		262		253
Actual return on plan assets	88		120		16		17
Employer contributions	4		1		3		3
Plan participants’ contributions	—		—		2		2
Benefits paid	(73)		(71)		(11)		(13)
Settlements	(3)		—		—		—
Net increase (decrease) in fair value of plan assets	16		50		10		9
Fair value of plan assets at end of year	1,183		1,167		272		262
Funded status — overfunded (underfunded)	$	246	$	161	$	140	$	117
Amounts recognized in the Consolidated Balance Sheet:
Noncurrent assets	$	270	$	187	$	143	$	120
Current liabilities	(4)		(4)		(3)		(3)
Noncurrent liabilities	(20)		(22)		—		—
Funded status — overfunded (underfunded)	$	246	$	161	$	140	$	117

Accumulated benefit obligation	$	929	$	998

____________

(1) 2024 amounts are due primarily to changes in the following factors: Pension Benefits - discount rate assumptions and interest crediting rate assumption; Other Postretirement Benefits - discount rate assumption. 2023 amounts are due primarily to changes in the following factors: Pension Benefits - interest crediting rate assumption and discount rate assumptions.

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Notes (Continued)

The following table summarizes information for pension plans with obligations in excess of plan assets at December 31.


	2024		2023
	(Millions)
Projected benefit obligation	$	23	$	26
Accumulated benefit obligation	22		24
Fair value of plan assets	—		—

Pre-tax amounts recognized in Accumulated other comprehensive income (loss) at December 31 are as follows:


	Pension Benefits				Other Postretirement Benefits
	2024		2023		2024		2023
	(Millions)
Net actuarial gain (loss)	$	49	$	(45)	$	20	$	19

Additionally, as of December 31, 2024 and 2023, Williams has $139 million and $123 million, respectively, of pension and other postretirement plan amounts included in regulatory liabilities associated with its gas pipeline companies.

Net Periodic Benefit Cost (Credit)

Net periodic benefit cost (credit) for the years ended December 31 consist of the following:


	Pension Benefits						Other Postretirement Benefits
	2024		2023		2022		2024		2023		2022
	(Millions)
Components of net periodic benefit cost (credit):
Service cost	$	25	$	23	$	28	$	1	$	1	$	1
Interest cost	47		46		31		7		7		6
Expected return on plan assets	(60)		(57)		(44)		(11)		(10)		(10)
Amortization of net actuarial loss (gain)	—		5		12		(5)		(3)		—
Net actuarial loss from settlements	1		—		3		—		—		—
Reclassification to regulatory liability	—		—		—		—		—		1
Net periodic benefit cost (credit) (1)	$	13	$	17	$	30	$	(8)	$	(5)	$	(2)

____________

(1) Components other than Service cost are included in Other income (expense) – net below Operating income (loss) in Williams’ Consolidated Statement of Income.

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Notes (Continued)

Items Recognized in Other Comprehensive Income (Loss)

Other changes in plan assets and benefit obligations recognized in Other comprehensive income (loss) before taxes for the years ended December 31 consist of the following:


	Pension Benefits						Other Postretirement Benefits
	2024		2023		2022		2024		2023		2022
	(Millions)
Net actuarial gain (loss) arising during the year	$	93	$	(5)	$	(14)	$	3	$	3	$	14
Amortization of net actuarial loss (gain)	—		5		12		(2)		(2)		—
Net actuarial loss from settlements	1		—		3		—		—		—
Total recognized in Other comprehensive income (loss)	$	94	$	—	$	1	$	1	$	1	$	14

Key Assumptions

The weighted-average assumptions utilized to determine benefit obligations and Net periodic benefit cost (credit) as of December 31 are as follows:


	Pension Benefits						Other Postretirement Benefits
	2024		2023		2022		2024		2023		2022
Benefit obligations:
Discount rate	5.60	%	4.98	%	5.16	%	5.67	%	5.01	%	5.20	%
Rate of compensation increase	3.48		3.52		3.58		N/A		N/A		N/A
Cash balance interest crediting rate	4.00		4.50		3.50		N/A		N/A		N/A
Net periodic benefit cost (credit):
Discount rate	4.98	%	5.16	%	2.84	%	5.01	%	5.20	%	2.93	%
Expected long-term rate of return on plan assets	5.31		5.17		3.81		4.16		4.04		3.67
Rate of compensation increase	3.52		3.58		3.67		N/A		N/A		N/A
Cash balance interest crediting rate	4.50		3.50		3.00		N/A		N/A		N/A

Williams uses mortality tables issued by the Society of Actuaries to measure the benefit obligations.

The assumed health care cost trend rate for 2025 is 9.2 percent. This rate decreases to 4.5 percent by 2034.

Plan Assets

The plans’ investment objectives include a framework to manage the volatility of the plans’ funded status and minimize future cash contributions. The plans follow a policy of diversifying the investments across various asset classes, strategies, and investment managers. In order to mitigate risks associated with investing, the investment policy for the pension plans defines target asset allocation percentages and outlines types of investments that are authorized and not authorized under the policy. The December 31, 2024, target asset allocation was 25 percent equity securities and 75 percent fixed income securities, including investments in equity and fixed income commingled investment funds and separate accounts.

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Notes (Continued)

The fair values of Williams’ pension and other postretirement benefits plan assets by asset class at December 31 are as follows:


	2024
	Pension Benefits						Other Postretirement Benefits
	Level 1 (1)		Level 2 (2)		Total		Level 1 (1)		Level 2 (2)		Total
	(Millions)
Cash management funds	$	29	$	—	$	29	$	103	$	—	$	103
Government debt securities	74		19		93		11		3		14
Corporate debt securities	—		295		295		—		43		43
Other	1		4		5		—		—		—
	$	104	$	318	422		$	114	$	46	160
Commingled investment funds (3):
Equities					292						43
Fixed income					469						69
Total assets at fair value					$	1,183					$	272


	2023
	Pension Benefits						Other Postretirement Benefits
	Level 1 (1)		Level 2 (2)		Total		Level 1 (1)		Level 2 (2)		Total
	(Millions)
Cash management funds	$	17	$	—	$	17	$	99	$	—	$	99
Government debt securities	61		17		78		9		2		11
Corporate debt securities	—		311		311		—		44		44
Other	2		5		7		1		—		1
	$	80	$	333	413		$	109	$	46	155
Commingled investment funds (3):
Equities					287						41
Fixed income					467						66
Total assets at fair value					$	1,167					$	262

____________

(1) Level 1 includes assets with fair values based on quoted prices in active markets for identical assets. Cash management funds and U.S. Treasury securities are included in this level.

(2) Level 2 includes assets with fair values determined by using significant other observable inputs. This level includes fixed income securities, other than U.S. Treasury securities, that are valued primarily using pricing models which incorporate observable inputs such as benchmark yields, reported trades, broker/dealer quotes, and issuer spreads.

(3) The commingled investment funds are measured at fair value using net asset value per share. Certain standard withdrawal restrictions generally apply, which may include redemption notification periods ranging from 1 day to 15 days.

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Notes (Continued)

Plan Benefit Payments and Employer Contributions

Following are the expected benefit payments, which reflect the same assumptions previously discussed and future service as appropriate.


	Pension Benefits		Other Postretirement Benefits
	(Millions)
2025	$	101	$	11
2026	95		11
2027	91		11
2028	87		11
2029	83		10
2030-2034	389		48

In 2025, Williams expects to contribute approximately $1 million to the pension plans and approximately $3 million to the other postretirement benefit plan.

Note 8 – Investing Activities

Equity-Method Investments


	Ownership Interest at December 31, 2024	December 31,
		2024		2023
		(Millions)
Appalachia Midstream Investments	(1)	$	2,810	$	2,886
OPPL	50%	385		387
Blue Racer	50%	366		398
Gulfstream	50%	196		210
Laurel Mountain	69%	171		184
Discovery (2)	100%	—		361
Other	Various	179		188
		$	4,107	$	4,614

___________

(1)Includes equity-method investments in multiple gathering systems in the Marcellus Shale region with an approximate average 66 percent interest.

(2)Discovery is a wholly owned subsidiary of Williams as of August 1, 2024. See Note 3 – Acquisitions and Divestitures.

Basis differential

The carrying value of Appalachia Midstream Investments exceeds Williams’ portion of the underlying net assets by approximately $1 billion and $1.1 billion at December 31, 2024 and 2023, respectively. These differences were assigned at the acquisition date to property, plant, and equipment and customer relationship intangible assets.

Certain other equity-method investments have a carrying value less than Williams’ portion of the underlying equity in the net assets primarily due to other than temporary impairments that Williams recognized but were not required to be recognized in the investees’ financial statements. These differences total approximately $634 million and $773 million at December 31, 2024 and 2023, respectively, and were assigned to property, plant, and equipment and customer relationship intangible assets. Differences in the carrying value of Williams’ equity-method investments and its portion of the equity in the underlying net assets are generally amortized over the remaining

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Notes (Continued)

useful lives of the associated underlying assets and included in Equity earnings (losses) within Williams’ Consolidated Statement of Income.

Purchases of and contributions to equity-method investments

Williams generally funds its portion of significant expansion or development projects of these investees through additional capital contributions. These transactions increased the carrying value of Williams’ investments and included:


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Appalachia Midstream Investments	$	74	$	59	$	83
Discovery	37		40		41
OPPL	2		1		—
Aux Sable Liquid Products LP	1		38		—
Cardinal Pipeline Company, LLC	—		—		16
Gulfstream	—		—		14


Other	—		3		12
	$	114	$	141	$	166

Dividends and distributions

The organizational documents of entities in which Williams has an equity-method investment generally require distribution of available cash to members on at least a quarterly basis. These transactions reduced the carrying value of its investments and included:


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Appalachia Midstream Investments	$	407	$	405	$	415
Gulfstream	103		98		89
Blue Racer	95		62		49
OPPL	90		56		34
Laurel Mountain	29		42		112
Discovery	22		49		49
RMM	—		49		52
Other	43		35		65
	$	789	$	796	$	865

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Notes (Continued)

Summarized Financial Position and Results of Operations of All Equity-Method Investments


	December 31,
	2024		2023
	(Millions)
Assets (liabilities):
Current assets	$	564	$	669
Noncurrent assets	9,439		11,058
Current liabilities	(1,146)		(358)
Noncurrent liabilities	(2,383)		(3,619)


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Gross revenue	$	2,880	$	3,714	$	5,520
Operating income	1,190		966		1,268
Net income	987		748		1,102

Sale of Aux Sable Interest

On August 1, 2024, Williams completed the sale of its equity-method investments in Aux Sable Liquid Products Inc., Aux Sable Liquid Products LP, and Aux Sable Midstream LLC (collectively, “Aux Sable”) in Williams’ Northeast G&P segment for total consideration of $161 million. As a result of this sale, Williams recorded a gain of $149 million in the third quarter of 2024. The gain is reflected in Other investing income (loss) – net in Williams’ Consolidated Statement of Income.

Other investing income (loss) – net

The following table presents certain items reflected in Other investing income (loss) – net in Williams’ Consolidated Statement of Income:


	Year Ended December 31,
	2024		2023		2022
			(Millions)
Gain on sale of Aux Sable investments	$	149	$	—	$	—
Gain on remeasurement of Discovery investment (Note 3)	127		—		—
Interest income	67		79		15
Gain on remeasurement of RMM investment (Note 3)	—		30		—
Other	—		(1)		1
	$	343	$	108	$	16

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Notes (Continued)

Note 9 – Property, Plant, and Equipment

The following tables present Property, plant, and equipment – net for the years ended:

Williams


	Estimated Useful Life (1) (Years)	Depreciation Rates (1) (%)	December 31,
			2024		2023
			(Millions)
Nonregulated:
Natural gas gathering and processing facilities	5 - 40		$	23,134	$	21,357
Construction in progress	Not applicable		1,543		1,138
Oil and gas properties	Units of production		1,685		1,111
Other	0 - 45		4,798		3,268
Regulated:
Natural gas transmission facilities	0 - 25	1.25 - 10.2	22,763		21,083
Construction in progress	Not applicable	Not applicable	542		1,124
Other	5 - 45	0.00 - 33.33	2,930		2,761
Total property, plant, and equipment, at cost			57,395		51,842
Accumulated depreciation and amortization			(18,703)		(17,531)
Property, plant, and equipment — net			$	38,692	$	34,311

Depreciation and amortization expense for Property, plant, and equipment – net was $1.8 billion, $1.7 billion, and $1.5 billion in 2024, 2023, and 2022, respectively.

Interest capitalized was $68 million, $54 million, and $20 million in 2024, 2023, and 2022, respectively.

Regulated Property, plant, and equipment – net includes approximately $354 million and $389 million at December 31, 2024 and 2023, respectively, related to the purchase price allocation of $1.5 billion to property, plant and equipment and adjustments to deferred taxes in excess of original cost from Williams’ purchase of Transco in 1995. This amount is being amortized over 40 years using the straight-line amortization method. Current FERC policy does not permit recovery through rates for amounts in excess of original cost of construction.

Transco


		Depreciation Rates (1) (%)	December 31,
	2024				2023
			(Millions)
Onshore transmission facilities		2.50 - 7.13	$	17,242		$	16,031
Offshore transmission facilities		1.25	659			681
Storage facilities		1.86 - 2.05	948			830
Gathering facilities		0.00 - 1.00	136			158
Construction in progress		Not applicable	420			1,008
Other		1.77 - 20.00	639			585
Total property, plant, and equipment, at cost			20,044			19,293
Accumulated depreciation and amortization			(5,941)			(5,963)
Property, plant, and equipment — net			$	14,103		$	13,330

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NWP


	Depreciation Rates (1) (%)	December 31,
		2024		2023
		(Millions)
Transmission facilities	2.70 - 10.20	$	3,821	$	3,570
Storage facilities	1.60 - 2.76	160		155
Construction in progress	Not applicable	66		85
Other	0.00 - 33.33	171		165
Total property, plant, and equipment, at cost		4,218		3,975
Accumulated depreciation and amortization		(2,089)		(2,026)
Property, plant, and equipment — net		$	2,129	$	1,949

__________

(1) Estimated useful life and depreciation rates are presented as of December 31, 2024. Depreciation rates and estimated useful lives for regulated assets are prescribed by the FERC.

Asset Retirement Obligations

Williams’ accrued obligations primarily relate to offshore platforms and pipelines, oil and gas properties, gas transmission pipelines and facilities, underground storage caverns, gas processing, fractionation, and compression facilities, and gas gathering well connections and pipelines. At the end of the useful life of each respective asset, Williams is legally obligated to dismantle offshore platforms and appropriately abandon offshore pipelines, to remove certain components of gas transmission facilities from the ground, to restore land and remove surface equipment at gas processing, fractionation, and compression facilities, to cap certain gathering pipelines at the wellhead connection and remove any related surface equipment, to plug storage caverns and remove any related surface equipment, and to plug producing wells and remove any related surface equipment.

The following tables present the significant changes to AROs, of which $2.548 billion and $1.978 billion are included in Regulatory liabilities, deferred income, and other with the remaining current portion in Other current liabilities at December 31, 2024 and 2023, respectively.

Williams


	Year Ended December 31,
	2024		2023
	(Millions)
Balance at beginning of year	$	2,084	$	1,914
Liabilities incurred (1)	474		42
Liabilities settled	(68)		(43)
Accretion	118		97
Revisions (2)	31		74

Balance at end of year	$	2,639	$	2,084

___________

(1)Includes $250 million, $106 million, and $114 million of ARO in 2024 related to the Discovery, Gulf Coast Storage, and Crowheart Acquisitions, respectively.

(2)Several factors are considered in the annual review process, including inflation rates, current estimates for removal cost, market risk premiums, discount rates, and the estimated remaining useful life of the assets.

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Transco


	Year Ended December 31,
	2024		2023
	(Millions)
Balance at beginning of year	$	619	$	563
Liabilities incurred	—		8
Liabilities settled	(32)		(23)
Accretion	29		31
Revisions (1)	(1)		40
Balance at end of year	$	615	$	619

___________

(1)Changes in estimates of existing obligations are primarily due to the annual review process, which considers various factors including inflation rate, current estimates for removal costs, discount rates, and the estimated remaining life of assets.

The funds Transco collects through a portion of its rates to fund its AROs are deposited into an external trust account dedicated to funding its AROs (ARO Trust). (See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk.)

NWP


	Year Ended December 31,
	2024		2023
	(Millions)
Balance at beginning of year	$	136	$	129
Accretion	8		7

Balance at end of year	$	144	$	136

NWP’s gross regulatory asset balances associated with ARO as of December 31, 2024 and 2023 were $124 million and $116 million, respectively. NWP’s regulatory asset is expected to be fully recovered through the negative salvage component of depreciation included in NWP’s rates; as such, the negative salvage component of accumulated depreciation collected through rates and reflected as a regulatory liability has been netted with the ARO regulatory asset to result in a regulatory liability of $30 million and $31 million at December 31, 2024 and 2023, respectively (See Note 10 – Regulatory Assets and Liabilities).

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Notes (Continued)

Note 10 – Regulatory Assets and Liabilities

The components of regulatory assets and liabilities include the effects of deferred taxes on equity funds used during construction, AROs, shipper imbalance activity, fuel and power cost differentials, depreciation, negative salvage, pension and other postretirement benefits, trackers, customer tax refunds, and rate allowances for deferred income taxes at a historically higher federal income tax rate.

Williams


	December 31,
	2024		2023
	(Millions)
Current assets reported within Other current assets and deferred charges	$	84	$	95
Noncurrent assets reported within Regulatory assets, deferred charges, and other	582		527
Total regulatory assets	$	666	$	622


Current liabilities reported within Other current liabilities	$	85	$	77
Noncurrent liabilities reported within Regulatory liabilities, deferred income, and other	1,300		1,288
Total regulatory liabilities	$	1,385	$	1,365

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Transco


	December 31,
	2024		2023
	(Millions)
Current regulatory assets:
Fuel recovery	$	47	$	60

ARO	16		16
Deferred cash out	6		6
ARO - Eminence	5		5
Total current regulatory assets	74		87
Long-term regulatory assets:
ARO	243		209
Grossed-up deferred taxes on equity AFUDC	29		31
ARO - Eminence	15		20
Slug catcher	6		6
Deferred cash out	—		11
Other	27		22
Total long-term regulatory assets	320		299
Total regulatory assets	$	394	$	386

Current regulatory liabilities:
Deferred taxes - liability	$	31	$	31
Postretirement benefits other than pension	—		8
Electric power cost	26		7
Pension	—		2
Other	1		1
Total current regulatory liabilities	58		49
Long-term regulatory liabilities:
Negative salvage	632		605
Deferred taxes - liability	252		283
Postretirement benefits other than pension	31		23
Pension	30		24
Sentinel meter station depreciation	7		7
Other	24		14
Total long-term regulatory liabilities	976		956
Total regulatory liabilities	$	1,034	$	1,005

The significant regulatory assets and liabilities include:

Fuel recovery: This amount represents the value of the cumulative volumetric difference between the gas retained from customers and the gas consumed in operations. These amounts are not included in the rate base, but assets and liabilities are expected to be recovered or refunded, respectively, in subsequent annual fuel tracker filings.

Electric power cost: This amount represents the value of the difference between the electric power costs recovered from our customers and the electric power costs incurred in operations. These amounts are expected to be recovered by changing the electric power reimbursement rate in subsequent annual electric power tracker filings.

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ARO: This regulatory asset balance includes the uncollected ARO depreciation expense and accretion expense. The regulatory asset is being recovered through rates, and is being amortized to expense consistent with the amounts collected in rates (see AROs in Note 9 – Property, Plant, and Equipment).

Deferred cash out: This amount represents the deferral of gains or losses on the purchases and sales of gas imbalances with shippers. These assets and liabilities amounts will be recovered or refunded, respectively, under terms provided for in Transco’s FERC tariff.

Asset retirement costs - Eminence: This regulatory asset balance is associated with the Eminence Storage Field retirement costs. The regulatory asset is being recovered through rates and is being amortized to expense consistent with the amounts collected in rates.

Grossed-up deferred taxes on equity AFUDC: This regulatory asset balance is established to offset the deferred tax for the equity component of the allowance for funds used during the construction of long-lived assets. All amounts were generated during the period that Transco was a taxable entity. Taxes on capitalized funds used during construction and the offsetting deferred income taxes are included in the rate base and are recovered over the depreciable lives of the long-lived assets to which they relate.

Slug catcher: This amount represents certain costs associated with the replacement of a component of a slug catcher which was included in the Docket No. RP18-1126 rate case settlement. A regulatory asset has been established to recognize the recovery of Transco’s investment in the slug catcher as it is collected through Transco’s depreciation rates and is being amortized at the prescribed depreciation rate for onshore transmission facilities (see Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies).

Negative salvage: Transco’s rates include a component designed to recover certain future retirement costs for which it is not required to record an ARO. Transco records a regulatory liability representing the cumulative residual amount of recoveries through rates, net of expenditures associated with these retirement costs.

Deferred taxes - liability: This regulatory liability balance was established as a result of a decrease to rate base deferred taxes due to a decrease to the effective federal income tax rate. The timing of the refund of the regulatory liability to rate payers is stated in the Docket No. RP18-1126 rate case settlement. Additionally, as of December 31, 2024, Transco has $13 million of rate base deferred taxes established as a result of a decrease to the effective state income tax rate. This amount and timing of the refund is being addressed in Transco’s ongoing rate case.

Postretirement benefits other than pension: Transco recovers the actuarially determined cost of postretirement benefits through rates that are set through periodic general rate filings. Any differences between the annual actuarially determined cost and the amounts recovered in rates are recorded as regulatory assets or liabilities to be collected or refunded through future rate adjustments. These amounts are not included in the rate base. Effective with the Docket No. RP18-1126 rate case settlement, the other postretirement benefits regulatory liability balance as of March 1, 2019, was fully amortized in 2024 (see Note 7 – Employee Benefit Plans).

Pension: Transco recovers the actuarially determined pension cash contributions through rates that are set through periodic general rate filings. Effective with the Docket No. RP18-1126 rate case settlement, any amounts of annual contributions that fall below the threshold are recorded as adjustments to income and refunded through future rate adjustments. Also effective with the Docket No. RP18-1126 rate case settlement, the pension regulatory liability balance as of March 1, 2019, was fully amortized in 2024 (see Note 7 – Employee Benefit Plans).

Sentinel meter station depreciation: This amount reflects the incremental depreciation being recorded related to the meter station modifications made for three of the Sentinel shippers. These modifications will be recovered through a surcharge over a defined period of time as stated in the Sentinel FERC order. The incremental depreciation represents the difference between the FERC granted depreciation rate for such facilities in the last rate case as compared to the depreciation rates in the Sentinel order which are based on the contractual terms in the surcharge agreements. The incremental depreciation will be recorded through the end of the contractual term and then will be amortized.

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NWP


	December 31,
	2024		2023
	(Millions)
Current regulatory assets:
Fuel recovery	$	4	$	—
Levelized depreciation	2		2
Total current regulatory assets	6		2
Long-term regulatory assets:
Levelized depreciation	7		10
Grossed-up deferred taxes on equity AFUDC	4		4
Washington State Carbon and Greenhouse Gas Tax	38		22
Total long-term regulatory assets	49		36
Total regulatory assets	$	55	$	38

Current regulatory liabilities:

Deferred taxes - liability	$	20	$	20

Fuel recovery	—		1
Total current regulatory liabilities	20		21
Long-term regulatory liabilities:
Deferred taxes - liability	160		179
Postretirement benefits other than pension	43		42
Negative salvage - net	30		31

Total long-term regulatory liabilities	233		252
Total regulatory liabilities	$	253	$	273

The significant regulatory assets and liabilities include:

Levelized depreciation: Levelized depreciation allows contract revenue streams to remain constant over the primary contract terms by recognizing lower than book depreciation in the early years and higher than book depreciation in later years. The depreciation component of the levelized incremental rates will equal the accumulated book depreciation by the end of the primary contract terms. The difference between levelized depreciation and straight-line book depreciation is recorded as a FERC approved regulatory asset or liability and is eliminated over the levelization period.

Grossed-up deferred taxes on equity AFUDC: This regulatory asset balance is established to offset the deferred tax for the equity component of the allowance for funds used during the construction of long-lived assets. All amounts were generated during the period that NWP was a taxable entity. Taxes on capitalized funds used during construction and the offsetting deferred income taxes are included in the rate base and are recovered over the depreciable lives of the long-lived assets to which they relate.

Washington State Carbon and Greenhouse Tax: This amount represents the cost of emission allowances and the associated accumulated interest as a result of the passage of the state of Washington Climate Commitment Act

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that took effect January 1, 2023. NWP’s Settlement allows it to recover the costs of purchasing allowances under the program in NWP’s next rate case.

Deferred taxes - liability: This regulatory liability balance was established as a result of a decrease to rate base deferred taxes due to a decrease to the effective federal and state income tax rates. The timing of the refund of the regulatory liability to rate payers is stated in the Docket No. RP22-1155 rate case settlement.

Postretirement benefits other than pension: NWP seeks to recover the actuarially determined cost of postretirement benefits through rates that are set through periodic general rate filings. Any differences between the annual actuarially determined cost and amounts currently being recovered in rates are recorded as regulatory assets or liabilities and collected or refunded through future rate adjustments. These amounts are not included in the rate base, and NWP is not currently recovering postretirement benefit costs in its rates (see Note 7 – Employee Benefit Plans).

Negative salvage, net of ARO asset: This regulatory liability balance reflects the amount that NWP has recovered in rates related to future retirement costs offset by depreciation of the ARO asset and accretion expense of the ARO liability due to the passage of time. AROs are expected to be fully recovered through the net negative salvage component of depreciation included in rates (see AROs in Note 9 – Property, Plant, and Equipment).

Note 11 – Goodwill and Other Intangible Assets

Goodwill

Changes in the carrying amount of goodwill, included in Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, by reportable segment for the years indicated are as follows:


	Transmission & Gulf of America		West		Total
	(Millions)
December 31, 2022	$	—	$	—	$	—
MountainWest Acquisition (Note 3)	400		—		400
Cureton Acquisition (Note 3)	—		6		6
RMM Acquisition (Note 3)	—		57		57
December 31, 2023	400		63		463

Cureton Acquisition (Note 3)	—		5		5
RMM Acquisition (Note 3)	—		(2)		(2)
December 31, 2024	$	400	$	66	$	466

Goodwill is not subject to amortization, but is evaluated at least annually for impairment or more frequently if impairment indicators are present. Williams did not identify or recognize any impairments to goodwill in connection with the evaluation of goodwill for impairment during the year ended December 31, 2024.

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Other Intangible Assets

The gross carrying amount and accumulated amortization of other intangible assets, included in Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, at December 31 are as follows:


	2024				2023
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
	(Millions)
Customer relationships	$	10,239	$	(3,523)	$	10,237	$	(3,155)
Transportation and storage capacity contracts	267		(244)		267		(223)
Other	6		(2)		6		(2)
Other intangible assets	$	10,512	$	(3,769)	$	10,510	$	(3,380)

Customer Relationships

Customer relationships primarily relate to gas gathering, processing, and fractionation contractual customer relationships recognized in acquisitions. Contractual customer relationships are being amortized on a straight-line basis over periods of up to 30 years, which represents the term over which the contractual customer relationships are expected to contribute to cash flows.

Williams expenses costs incurred to renew or extend the terms of its gas gathering, processing, and fractionation contracts with customers. Although a significant portion of the expected future cash flows associated with these contractual customer relationships are dependent on the ability to renew or extend the arrangements beyond the initial contract periods, these expected future cash flows are significantly influenced by the scope and pace of Williams’ producer customers’ drilling programs. Once producer customers’ wells are connected to Williams’ gathering infrastructure, their likelihood of switching to another provider before the wells are abandoned is reduced due to the significant capital investment required.

The amortization expense related to customer relationships was $368 million, $360 million, and $353 million in 2024, 2023, and 2022, respectively. The estimated amortization expense for each of the next five succeeding fiscal years is $368 million, $364 million, $360 million, $360 million, and $360 million.

Transportation and Storage Capacity Contracts

Certain transportation and storage capacity contracts were recognized as intangible assets as part of the acquisition of Sequent in 2021. The amortization expense related to transportation and storage capacity contracts was $21 million, $51 million, and $158 million in 2024, 2023, and 2022, respectively. The estimated amortization expense for each of the next five succeeding fiscal years is $10 million, $7 million, $4 million, $2 million, and $0 million.

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Note 12 – Other Current Liabilities

Williams


	December 31,
	2024		2023
	(Millions)
Interest on debt	$	350	$	322
Employee costs	285		197
Contract liabilities (Note 5)	170		159
Alaska refinery contamination litigation (Note 1)	—		134
Asset retirement obligations (Note 9)	91		106
Regulatory liabilities (Note 10)	85		77
Operating lease liabilities (Note 14)	26		24

Other, including accrued loss contingencies	353		265
	$	1,360	$	1,284

Transco


	December 31,
	2024		2023
	(Millions)
Interest on debt	$	76	$	76
Contract liabilities	10		10
Customer deposits	38		35
Other	57		69

	$	181	$	190

NWP


	December 31,
	2024		2023
	(Millions)
Interest on debt	$	6	$	6
Taxes, other than income taxes	8		7
Contract liabilities	—		1
Transportation and gas exchange payables	10		5
Other	10		15

	$	34	$	34

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Note 13 – Debt and Banking Arrangements

Long-Term Debt by Issuing Entity


	December 31,
	2024		2023
	(Millions)
Transco:
7.08% Debentures due 2026	$	8	$	8
7.25% Debentures due 2026	200		200
7.85% Notes due 2026	1,000		1,000
4% Notes due 2028	400		400
3.25% Notes due 2030	700		700
5.4% Notes due 2041	375		375
4.45% Notes due 2042	400		400
4.6% Notes due 2048	600		600
3.95% Notes due 2050	500		500
Other financing obligation — Atlantic Sunrise	764		790
Other financing obligation — Leidy South	75		76
Other financing obligation — Dalton	247		250
Unamortized debt issuance costs	(23)		(26)
Net unamortized debt premium (discount)	(11)		(12)
Total debt — Transco	$	5,235	$	5,261
MountainWest:
3.53% Notes due 2028 (Note 3)	$	100	$	100
3.91% Notes due 2038 (Note 3)	150		150
4.875% Notes due 2041 (Note 3)	180		180
Net unamortized debt premium (discount)	(58)		(61)
Total debt — MountainWest	$	372	$	369
NWP:
7.125% Debentures due 2025	$	85	$	85
4% Notes due 2027	500		500
Unamortized debt issuance costs	(1)		(2)
Net unamortized debt premium (discount)	(2)		(2)
Total debt — NWP	$	582	$	581
Williams:
4.3% Notes due 2024	$	—	$	1,000
4.55% Notes due 2024	—		1,250

3.9% Notes due 2025	750		750
4% Notes due 2025	750		750
5.4% Notes due 2026	1,100		1,100
7.7% Notes due 2027	2		2
3.75% Notes due 2027	1,450		1,450
5.3% Notes due 2028	900		900
4.9% Notes due 2029	1,100		—
4.8% Notes due 2029	450		—
3.5% Notes due 2030	1,000		1,000
2.6% Notes due 2031	1,500		1,500
7.5% Debentures due 2031	339		339
7.75% Notes due 2031	252		252
8.75% Notes due 2032	445		445
4.65% Notes due 2032	1,000		1,000
5.65% Notes due 2033	750		750
5.15% Notes due 2034	1,300		—
6.3% Notes due 2040	1,250		1,250
5.8% Notes due 2043	400		400

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	December 31,
	2024		2023
	(Millions)
5.4% Notes due 2044	500		500
5.75% Notes due 2044	650		650
4.9% Notes due 2045	500		500
5.1% Notes due 2045	1,000		1,000
4.85% Notes due 2048	800		800
3.5% Notes due 2051	650		650
5.3% Notes due 2052	750		750
5.8% Notes due 2054	750		—

Unamortized debt issuance costs	(130)		(112)
Net unamortized debt premium (discount)	(41)		(39)
Total debt — Williams	$	20,167	$	18,837
RMM deferred consideration obligation (Note 3)	—		665
Gulf Coast Storage deferred consideration obligation (Note 3)	100		—
Total debt	$	26,456	$	25,713
Long-term debt due within one year — Williams	(1,600)		(2,305)
Long-term debt due within one year — Transco	(35)		(32)
Long-term debt due within one year — NWP	(85)		—
Long-term debt	$	24,736	$	23,376

Certain of Williams’ debt agreements contain covenants that restrict or limit, among other things, its ability to create liens supporting indebtedness, sell assets, and incur additional debt. Default of these agreements could also restrict Williams’ ability to make certain distributions or repurchase equity.

The following table presents aggregate minimum maturities of long-term debt, other financing obligations, and the Gulf Coast Storage deferred consideration obligation, excluding net unamortized debt premium (discount) and debt issuance costs, for each of the next five years:


	December 31, 2024
	(Millions)
Williams:
2025	$	1,720
2026	2,345
2027	1,994
2028	1,445
2029	1,600

Transco:
2025	$	35
2026	1,245
2027	41
2028	445
2029	50

NWP:
2025	$	85
2027	500

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Issuances

Williams senior unsecured public debt issuances for the past three years and subsequent to the balance sheet date are as follows:


Issue Date	Maturity Date	Amount		Rate
		(Millions)
January 9, 2025	March 15, 2035	$	1,000	5.600%
January 9, 2025	March 15, 2055	500		6.000%
August 13, 2024	November 15, 2029	450		4.800%
August 13, 2024 (1)	March 15, 2034	300		5.150%
August 13, 2024	November 15, 2054	750		5.800%
January 5, 2024	March 15, 2029	1,100		4.900%
January 5, 2024	March 15, 2034	1,000		5.150%
August 10, 2023 (2)	March 2, 2026	350		5.400%
August 10, 2023	August 15, 2028	900		5.300%
March 2, 2023	March 2, 2026	750		5.400%
March 2, 2023	March 15, 2033	750		5.650%
August 8, 2022	August 15, 2032	1,000		4.650%
August 8, 2022	August 15, 2052	750		5.300%

________________

(1) Additional issuance of the 5.15 percent senior notes due 2034 issued on January 5, 2024, and trade interchangeably with such notes.

(2) Additional issuance of the 5.40 percent senior notes due 2026 issued on March 2, 2023, and trade interchangeably with such notes.

Retirements

Williams’ senior unsecured public debt retirements for the past three years and subsequent to the balance sheet date are as follows:


Date of Retirement	Maturity Date	Amount		Rate
		(Millions)
January 15, 2025	January 15, 2025	$	750	3.900%
June 24, 2024	June 24, 2024	1,250		4.550%
March 4, 2024	March 4, 2024	1,000		4.300%
November 15, 2023	November 15, 2023	600		4.500%
October 17, 2022	January 15, 2023	850		3.700%
May 16, 2022	August 15, 2022	750		3.350%
January 18, 2022	March 15, 2022	1,250		3.600%

Other financing obligations

During the construction of the Atlantic Sunrise, Leidy South, and Dalton projects, Transco received funding from co-owners for their proportionate share of construction costs. Amounts received were recorded within

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noncurrent liabilities and the costs associated with construction were capitalized. Upon placing these projects into service Transco began utilizing the co-owners’ undivided interest in the assets, including the associated pipeline capacity, and reclassified the funding previously received from its co-owners from noncurrent liabilities to debt. The obligations, which mature in 2038, 2041, and 2052, respectively, require monthly interest and principal payments and bear interest rates of approximately 9 percent, 13 percent, and 9 percent, respectively.

Credit Facility


	December 31, 2024
	Stated Capacity		Outstanding
	(Millions)
Long-term credit facility (1)	$	3,750	$	—
Letters of credit under certain bilateral bank agreements			15

________________

Revolving credit facility

In October 2021, Williams along with Transco and NWP, the lenders named therein, and an administrative agent entered into an amended and restated credit agreement (Credit Agreement) that reduced aggregate commitments available from $4.5 billion to $3.75 billion, with up to an additional $500 million increase in aggregate commitments available under certain circumstances. The Credit Agreement was effective on October 8, 2021. In the second quarter of 2023, the maturity date of the Credit Agreement was extended one year and now expires October 8, 2027. The amended Credit Agreement allows the co-borrowers to request up to two extensions of the maturity date each for an additional one-year period to allow a maturity date as late as October 8, 2029, under certain circumstances. Additionally, the amended Credit Agreement replaces the London Interbank Offered Rate with the Term Secured Overnight Financing Rate as the benchmark interest rate index. The Credit Agreement allows for swing line loans up to an aggregate of $200 million, subject to available capacity under the credit facility, and letters of credit commitments of $500 million. Transco and NWP are each able to borrow up to $500 million under this credit facility to the extent not otherwise utilized by the other co-borrowers.

The Credit Agreement contains the following terms and conditions:

•Various covenants may limit, among other things, a borrower’s and its material subsidiaries’ ability to grant certain liens supporting indebtedness, merge or consolidate, sell all or substantially all of its assets in certain circumstances, make certain distributions during an event of default, and each borrower and each borrower’s respective material subsidiaries’ ability to enter into certain restrictive agreements.

•If an event of default with respect to a borrower occurs under the credit facility, the lenders will be able to terminate the commitments for the respective borrowers and accelerate the maturity of the loans of the defaulting borrower under the credit facility and exercise other rights and remedies.

•Other than swing line loans, each time funds are borrowed, the applicable borrower may choose from two methods of calculating interest: a fluctuating base rate equal to an alternative base rate as defined in the Credit Agreement plus an applicable margin or a periodic fixed rate equal to the Term Secured Overnight Financing Rate plus an applicable margin. Williams is required to pay a commitment fee based on the unused portion of the credit facility. The applicable margin is determined by reference to a pricing schedule based on the applicable borrower’s senior unsecured long-term debt ratings and the commitment fee is determined by reference to a pricing schedule based on Williams’ senior unsecured long-term debt ratings.

Significant financial covenants under the Credit Agreement require Williams’ ratio of debt to EBITDA (earnings before interest, taxes, depreciation, and amortization), each as defined in the Credit Agreement, to be no

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greater than 5.0 to 1.0, except that for any fiscal quarter in which the funding of the purchase price for an acquisition (whether effectuated as one or a series of related transactions) with an aggregate purchase price of $25 million or more has been effected, and the following two fiscal quarters (in each case subject to certain limitations), the ratio of debt to EBITDA is to be no greater than 5.5 to 1.

The ratio of debt to capitalization (defined as net worth plus debt), each as defined in the Credit Agreement, must be no greater than 65 percent for each of Transco and NWP.

Williams expects to be in compliance with these covenants for the December 31, 2024 reporting period.

Commercial Paper Program

Williams has a $3.5 billion commercial paper program. The maturities of the commercial paper notes vary but may not exceed 397 days from the date of issuance. The commercial paper notes are sold under customary terms in the commercial paper market and are issued at a discount from par, or, alternatively, are sold at par and bear varying interest rates on a fixed or floating basis. The net proceeds of issuances of the commercial paper notes are expected to be used to fund planned capital expenditures and for other general corporate purposes. At December 31, 2024, $455 million commercial paper was outstanding at a weighted-average interest rate of 4.6 percent. At December 31, 2023, $725 million of commercial paper was outstanding at a weighted-average interest rate of 5.6 percent.

Restrictive Debt Covenants

At December 31, 2024, none of Transco’s nor NWP’s debt instruments restrict the amount of distributions to Williams, provided, however, that under the credit facility described above, Transco or NWP are restricted from making distributions to Williams during an event of default if Transco or NWP have directly incurred indebtedness under the credit facility. The debt agreements of Transco and NWP contain restrictions on their ability to incur secured debt beyond certain levels and to guarantee certain indebtedness. The indenture governing Transco’s $1 billion of 7.85 percent Senior Notes due 2026 further restricts its ability to guarantee certain indebtedness. Transco and NWP expect to be in compliance with these covenants, for the December 31, 2024 reporting period.

Cash Payments for Interest by Registrant (Net of Amounts Capitalized)


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Williams	$	1,293	$	1,152	$	1,117
Transco	302		307		326
NWP	24		26		26

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Note 14 – Leases

Williams, Transco, and NWP are lessees through noncancellable lease agreements for property and equipment consisting primarily of buildings, land, vehicles, and equipment used in both its operations and administrative functions.

Williams


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Lease Cost:
Operating lease cost	$	39	$	38	$	34
Variable lease cost	31		31		26
Sublease income	—		(1)		—
Total lease cost	$	70	$	68	$	60
Cash paid for operating lease liabilities	$	37	$	37	$	33


	December 31,
	2024		2023
	(Dollars in Millions)
Other Information:
Right-of-use assets (included in Regulatory assets, deferred charges, and other)	$	154	$	159
Operating lease liabilities:
Current (included in Other current liabilities)	$	26	$	24
Noncurrent (included in Regulatory liabilities, deferred income, and other)	$	142	$	148
Weighted-average remaining lease term – operating leases (years)	11		11
Weighted-average discount rate – operating leases	4.90%		4.78%

At December 31, 2024, the following table represents operating lease maturities, including renewal provisions Williams has assessed as being reasonably certain of exercise, for each of the years ended December 31:


	(Millions)
2025	$	34
2026	33
2027	30
2028	22
2029	19
Thereafter	86
Total future lease payments	224
Less: Amount representing interest	56
Total obligations under operating leases	$	168

Williams is the lessor to certain lease agreements for office space in its headquarters building, which are insignificant to its financial statements.

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Transco


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Lease Cost:
Operating lease cost	$	9	$	9	$	9
Variable lease cost	7		7		7
Total lease cost	$	16	$	16	$	16
Cash paid for operating lease liabilities	$	9	$	10	$	10

			December 31,
			2024		2023
			(Dollars in Millions)
Other Information:
Right-of-use assets (included in Deferred charges and other in Transco’s Balance Sheet)			$	48	$	53
Operating lease liabilities:
Current (included in Other current liabilities in Transco’s Balance Sheet)			$	6	$	6
Noncurrent (included in Deferred income and other in Transco’s Balance Sheet)			$	51	$	56
Weighted-average remaining lease term – operating leases (years)			13		13
Weighted-average discount rate – operating leases			4.77%		4.73%

As of December 31, 2024, the following table represents operating lease maturities, including renewal provisions that Transco has assessed as being reasonably certain of exercise, for each of the years ended December 31:


	(Millions)
2025	$	9
2026	9
2027	10
2028	10
2029	10
Thereafter	32
Total future lease payments	80
Less: Amount representing interest	23
Total obligations under operating leases	$	57

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NWP


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Lease Cost:
Operating lease cost	$	3	$	1		$	1
Variable lease cost	1		1			1
Total lease cost	$	4	$	2		$	2
Cash paid for operating lease liabilities	$	2	$	1		$	1

			December 31,
			2024			2023
			(Dollars in Millions)
Other Information:
Right-of-use assets (included in Deferred charges and other in NWP’s Balance Sheet)			$	5		$	9
Operating lease liabilities:
Current (included in Other current liabilities in NWP’s Balance Sheet)			$	1		$	1
Noncurrent (included in Deferred income and other in NWP’s Balance Sheet)			$	5		$	7
Weighted-average remaining lease term – operating leases (years)			19			15
Weighted-average discount rate – operating leases			4.90%			4.18%

As of December 31, 2024, the following table represents operating lease maturities, including renewal provisions that NWP has assessed as being reasonably certain of exercise, for each of the years ended December 31:


	(Millions)
2025	$	1
2026	—
2027	1
2028	—
2029	1
Thereafter	6
Total future lease payments	9
Less: Amount representing interest	3
Total obligations under operating leases	$	6

Note 15 – Equity-Based Compensation

Williams’ Plan Information

The Williams Companies, Inc. 2007 Incentive Plan (the Plan) provides common-stock-based awards to both employees and nonmanagement directors. To date, 50 million new shares have been authorized for making awards under the Plan. The Plan permits the granting of various types of awards including, but not limited to, restricted stock units and stock options. At December 31, 2024, 17 million shares of common stock were reserved for issuance pursuant to existing and future stock awards, of which 9 million shares were available for future grants.

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Additionally, up to 5.2 million new shares of Williams’ common stock have been authorized to date to be available for sale under Williams’ Employee Stock Purchase Plan (ESPP). Employees purchased 240 thousand shares at a weighted-average price of $33.00 per share during 2024. Approximately 0.7 million shares were available for purchase under the ESPP at December 31, 2024.

Williams recognizes compensation expense on employee stock-based awards on a straight-line basis; forfeitures are recognized when they occur. Operating and maintenance expenses and Selling, general, and administrative expenses in Williams’ Consolidated Statement of Income include equity-based compensation expense in 2024, 2023, and 2022 of $99 million, $77 million, and $73 million, respectively. Income tax benefit recognized related to the stock-based compensation expense in 2024, 2023, and 2022 was $24 million, $19 million, and $18 million, respectively. Measured but unrecognized stock-based compensation expense at December 31, 2024, was $70 million, all of which related to restricted stock units. These amounts are expected to be recognized over a weighted-average period of 1.7 years.

Nonvested Restricted Stock Units

At December 31, 2024 and 2023, Williams had restricted stock units outstanding, including performance-based shares, of 6.4 million shares and 6.6 million shares, respectively, with a weighted-average fair value of $32.48 and $28.34, respectively. During 2024 and 2023, Williams granted 3.1 million and 3.8 million shares of restricted stock units with a weighted-average fair value of $31.77 and $27.43, respectively. Restricted stock units generally vest after three years. Performance-based grants may vest at a range from zero percent to 200 percent of the original shares granted based on performance against a target. At December 31, 2024, there were 1.8 million performance-based shares outstanding.

Stock Options

There were no stock options granted in 2024, 2023, or 2022. At December 31, 2024, Williams had 0.4 million stock options that were both outstanding and exercisable, with a weighted-average exercise price of $29.99. The weighted-average remaining contractual life for stock options that were both outstanding and exercisable at December 31, 2024, was 2.4 years. Cash received for the exercise of stock options in 2024 and 2023 was $5 million and $2 million, respectively, and the related income tax benefit recognized in both 2024 and 2023 was $2 million.

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Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk

The following table presents, by level within the fair value hierarchy, certain of Williams’, Transco’s, and NWP’s significant financial assets and liabilities. The carrying values of cash and cash equivalents, accounts receivable, accounts payable, and commercial paper approximate fair value because of the short-term nature of these instruments. Therefore, these assets and liabilities are not presented in the following table.


					Fair Value Measurements Using
	Carrying Amount		Fair Value		Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(Millions)
Assets (liabilities) at December 31, 2024:
Measured on a recurring basis:
ARO Trust investments - Transco	$	297	$	297	$	297	$	—	$	—
Commodity derivative assets (1)	344		726		427		188		111
Commodity derivative liabilities (1)	(400)		(1,070)		(532)		(475)		(63)


Additional disclosures:


Debt by issuer, including current portion:
Williams	(20,167)		(19,517)		—		(19,517)		—
Transco	(5,235)		(5,276)		—		(5,276)		—
NWP	(582)		(573)		—		(573)		—
MountainWest	(372)		(364)		—		(364)		—
Gulf Coast Storage deferred consideration obligation (Note 3)	(100)		(100)		—		(100)		—
Total debt	(26,456)		(25,830)		—		(25,830)		—

Guarantees	(36)		(28)		—		(12)		(16)

Assets (liabilities) at December 31, 2023:
Measured on a recurring basis:
ARO Trust investments - Transco	$	269	$	269	$	269	$	—	$	—
Commodity derivative assets (1)(2)	314		866		514		196		156
Commodity derivative liabilities (1)(2)	(287)		(841)		(376)		(362)		(103)
Interest rate derivatives	6		6		—		6		—
Additional disclosures:

Debt by issuer, including current portion:
Williams	(18,837)		(18,494)		—		(18,494)		—
Transco	(5,261)		(5,438)		—		(5,438)		—
NWP	(581)		(581)		—		(581)		—
MountainWest	(369)		(375)		—		(375)		—
RMM deferred consideration obligation (Note 3)	(665)		(665)		—		(665)		—
Total debt	(25,713)		(25,553)		—		(25,553)		—

Guarantees	(37)		(28)		—		(12)		(16)

(1)The carrying amount is presented net of counterparty offsetting arrangements and collateral (see Note 17 – Commodity Derivatives).

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(2)Previously, the fair value of Williams’ commodity derivative assets and liabilities were disclosed by level within the fair value hierarchy net of counterparty offsetting arrangements. The December 31, 2023, amounts have been corrected to disclose the fair values by level on a gross basis, as presented above.

Fair Value Methods

The following methods and assumptions are used in estimating the fair value of financial instruments:

Assets Measured at Fair Value on a Recurring Basis

ARO Trust investments

Transco is entitled to collect rates in the amounts necessary to fund its future AROs and deposits a portion of the collected rates, pursuant to the terms of its Docket Number RP18-1126 rate case settlement, into an ARO Trust. The ARO Trust invests in a moderate risk portfolio of actively traded mutual funds that are measured at fair value on a recurring basis based on quoted prices in an active market and is reported in Regulatory assets, deferred charges, and other in Williams’ Consolidated Balance Sheet and in Deferred charges and other in the Transco Balance Sheet. The Money Market Funds held in the ARO Trust are considered investments. Both realized and unrealized gains and losses are ultimately recorded to the ARO regulatory asset.

Pursuant to the approved stipulation and agreement in Docket Number RP18-1126 the annual funding obligation effective March 1, 2020, is approximately $16 million, with deposits made monthly.

Transco investments within the ARO Trust were as follows:


	December 31, 2024				December 31, 2023
	Amortized Cost Basis		Fair Value		Amortized Cost Basis		Fair Value
	(Millions)
Money Market Funds	$	27	$	27	$	26	$	26
U.S. Equity Funds	53		146		53		120
International Equity Funds	32		40		32		39
Municipal Bond Funds	88		84		87		84
Total	$	200	$	297	$	198	$	269

Commodity derivatives

Williams’ commodity derivatives include exchange-traded contracts and OTC contracts, which consist of physical forwards, futures, and swaps that are measured at fair value on a recurring basis. Williams also has other derivatives related to asset management agreements and other contracts that require physical delivery. Derivatives classified as Level 1 are valued using New York Mercantile Exchange (NYMEX) futures prices. Derivatives classified as Level 2 are valued using basis transactions that represent the cost to transport natural gas from a NYMEX delivery point to the contract delivery point. These transactions are based on quotes obtained either through electronic trading platforms or directly from brokers. Derivatives classified as Level 3 are valued using a combination of observable and unobservable inputs. See Note 17 – Commodity Derivatives for additional information.

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The following table presents a reconciliation of changes in fair value of the net commodity derivatives classified as Level 3 in the fair value hierarchy.




	Year Ended December 31,
	2024		2023
	(Millions)
Balance at beginning of period	$	53	$	(56)
Gains (losses) included in Williams’ Consolidated Statement of Income	(5)		91
Purchases, issuances, and settlements	(1)		20
Transfers into Level 3	1		—
Transfers out of Level 3	—		(2)
Balance at end of period	$	48	$	53

A substantial portion of the December 31, 2024, and December 31, 2023, Level 3 derivatives relate to a long-term physical natural gas purchase contract associated with an ongoing pipeline expansion project. The valuation of this contract reflects the extrapolation of forward natural gas prices for periods beyond observable price curves, which is considered a significant unobservable input.

Interest rate derivatives

At December 31, 2023, Williams held interest rate derivative agreements with notional amounts totaling $1.15 billion. During 2024, Williams entered into additional agreements totaling $950 million of notional value and terminated agreements totaling $1.75 billion of notional value coinciding with issuances of long-term debt (see Note 13 – Debt and Banking Arrangements). At December 31, 2024, Williams holds interest rate derivative agreements with notional amounts totaling $350 million. The fair value of these derivatives is determined using discounted cash flows considering forward interest rates and the terms of the agreements, corroborated by counterparty valuations, and is classified as a Level 2 measurement. These derivatives are designated as cash flow hedges to reduce interest rate exposure on future corporate debt issuances. Gains and losses on these derivative agreements are reflected as a component of AOCI and, after the termination of the agreements, are amortized to earnings over the term of the related debt as a component of Interest expense. These interest rate derivative agreements are reported in Derivative assets and Derivative liabilities.

Additional Fair Value Disclosures

Long-term debt, including current portion

The disclosed fair value of long-term debt is determined primarily by a market approach using broker quoted indicative period-end bond prices. The quoted prices are based on observable transactions in less active markets for the debt or similar instruments. The fair values of the financing obligations associated with Transco’s Dalton, Leidy South, and Atlantic Sunrise projects, as well as the deferred consideration obligations associated with the RMM Acquisition and the Gulf Coast Storage Acquisition (see Note 3 – Acquisitions and Divestitures), all included within long-term debt including current portion, were determined using an income approach (see Note 13 – Debt and Banking Arrangements).

Guarantees

Guarantees primarily consist of a guarantee Williams has provided in the event of nonpayment by a previously owned communications subsidiary, Williams Communications Group, Inc., (WilTel), on a lease performance obligation that extends through 2042. Guarantees also include an indemnification related to a disposed operation.

To estimate the fair value of the WilTel guarantee, an estimated default rate is applied to the sum of the future contractual lease payments using an income approach. The estimated default rate is determined by obtaining the

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average cumulative issuer-weighted default rate based on the credit rating of WilTel’s current owner and the term of the underlying obligation. The default rate is published by Moody’s Investors Service. The carrying value of the WilTel guarantee is reported in Other current liabilities. The maximum potential undiscounted liquidity exposure is approximately $22 million at December 31, 2024. The exposure declines systematically through the remaining term of WilTel’s obligation.

The fair value of the guarantee associated with the indemnification related to a disposed operation was estimated using an income approach that considered probability-weighted scenarios of potential levels of future performance. The terms of the indemnification do not limit the maximum potential future payments associated with the guarantee. The carrying value of this guarantee is reported in Regulatory liabilities, deferred income, and other.

Williams is required by its revolving credit agreement to indemnify lenders for certain taxes required to be withheld from payments due to the lenders and for certain tax payments made by the lenders. The maximum potential amount of future payments under these indemnifications is based on the related borrowings and such future payments cannot currently be determined. These indemnifications generally continue indefinitely unless limited by the underlying tax regulations and have no carrying value. Williams has never been called upon to perform under these indemnifications and there is no current expectation of a future claim.

Concentration of Credit Risk

Accounts receivable

The following table summarizes Williams’ concentration of receivables, net of allowances:


	December 31,
	2024		2023
	(Millions)
NGLs, natural gas, and related products and services	$	594	$	589
Regulated interstate natural gas transportation and storage	339		310
Marketing of natural gas and NGLs	516		321
Upstream activities	45		72
Accounts receivable related to revenues from contracts with customers	1,494		1,292
Receivables from derivatives	294		311
Other accounts receivable	75		52
Trade accounts and other receivables - net	$	1,863	$	1,655

Williams’ customers include producers, distribution companies, industrial users, gas marketers, and pipelines primarily located in the continental United States. As a general policy, collateral is not required for receivables with the exception of the marketing receivables discussed below. Customers’ financial condition and credit worthiness are evaluated regularly and, based upon this evaluation, Williams may obtain collateral to support receivables.

Williams uses established credit policies to determine and monitor the creditworthiness of gas marketing and trading counterparties, including requirements to post collateral or other credit security, as well as the quality of pledged collateral. Collateral or credit security is most often in the form of cash or letters of credit from an investment-grade financial institution, but may also include U.S. government securities. Williams also utilizes netting agreements whenever possible to mitigate exposure to gas marketing and trading counterparty credit risk. When more than one derivative transaction with the same counterparty is outstanding and a legally enforceable netting agreement exists with that counterparty, the “net” mark-to-market exposure represents a reasonable measure of the credit risk with that counterparty.

Transco and NWP receivables from contracts with customers are included within Receivables - Trade and Receivables - Affiliates. Receivables that are not related to contracts with customers are included within the balance of Receivables - Advances to affiliate and Receivables - Other.

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Revenues

Customers representing 10 percent or more of Transco’s and NWP’s revenues include:


	Year Ended December 31,
	2024		2023		2022
	(Millions)
Transco:
Dominion Energy, Inc (1)	$	217	$	287	$	293

NWP:
Puget Sound Energy, Inc.	$	136	$	126	$	131
Cascade Natural Gas Corporation	46		47		49
Northwest Natural Gas Company	47		47		49

_______________

(1) The 2024 amount is less than 10 percent of Transco’s revenue.

Note 17 – Commodity Derivatives

Williams is exposed to commodity price risk and utilizes derivatives to manage a portion of that risk. Williams reports the fair value of commodity derivatives in Derivative assets; Regulatory assets, deferred charges, and other; Derivative liabilities; or Regulatory liabilities, deferred income, and other. These amounts are presented on a net basis by counterparty and reflect the netting of asset and liability positions permitted under the terms of master netting arrangements and cash held on deposit in margin accounts that Williams has received or remitted to collateralize certain derivative positions. See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk for additional fair value information. In Williams’ Consolidated Statement of Cash Flows, any cash impacts of settled commodity derivatives are recorded as operating activities.

Williams enters into commodity derivatives to economically hedge exposures to natural gas, NGLs, and crude oil and retains exposure to price changes that can, in a volatile energy market, be material and can adversely affect its results of operations.

Volumes

At December 31, 2024, the notional volume of the net long (short) positions for Williams’ commodity derivative contracts were as follows:

Commodity

Unit of Measure

Net Long (Short) Position

Index Risk

Natural Gas

MMBtu

592,842,257

Central Hub Risk - Henry Hub

Natural Gas

MMBtu

(50,513,793)

Basis Risk

Natural Gas

MMBtu

13,306,615

Central Hub Risk - Mont Belvieu

Natural Gas Liquids

Barrels

(2,561,000)

Basis Risk

Natural Gas Liquids

Barrels

(205,000)

Central Hub Risk - WTI

Crude Oil

Barrels

(480,000)

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Financial Statement Presentation

The fair value of commodity derivatives, which are not designated as hedging instruments for accounting purposes, is reflected as follows:


	December 31, 2024				December 31, 2023
Commodity Derivatives Categories	Assets		(Liabilities)		Assets		(Liabilities)
	(Millions)





Current	$	508	$	(635)	$	623	$	(496)
Noncurrent	218		(435)		243		(345)
Total commodity derivatives	$	726	$	(1,070)	$	866	$	(841)
Counterparty and collateral netting offset	(382)		670		(552)		554
Amounts recognized in Williams’ Consolidated Balance Sheet	$	344	$	(400)	$	314	$	(287)

The pre-tax impacts of Williams’ commodity derivatives, which are not designated as hedging instruments for accounting purposes, are reflected as follows:


		Year Ended December 31,

		2024		2023		2022
	(Millions)
Net gain (loss) from commodity derivatives within Total revenues:

Realized		$	111	$	253	$	(91)
Unrealized		(361)		703		(296)
		$	(250)	$	956	$	(387)

Net gain (loss) from commodity derivatives within Net processing commodity expenses:
Realized		$	(8)	$	(4)	$	16
Unrealized		(6)		(43)		47
		$	(14)	$	(47)	$	63
Total net gain (loss) from commodity derivatives		$	(264)	$	909	$	(324)

Contingent Features

Generally, collateral may be provided in the form of a parent guaranty, letter of credit, or cash. If collateral is required, fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are offset against fair value amounts recognized for derivatives executed with the same counterparty.

Williams has specific trade and credit contracts that contain minimum credit rating requirements. These credit rating requirements typically give counterparties the right to suspend or terminate credit if Williams’ credit ratings are downgraded to non-investment grade status. Under such circumstances, Williams would need to post collateral to continue transacting business with these counterparties. At December 31, 2024, the contractually required collateral in the event of a credit rating downgrade to non-investment grade status was $6 million.

Williams maintains accounts with brokers or the clearing houses of certain exchanges to facilitate financial derivative transactions. Based on the value of the positions in these accounts and the associated margin requirements, Williams may be required to deposit cash into these accounts. At December 31, 2024, and 2023, net cash collateral held on deposit in broker margin accounts was $288 million, and $2 million, respectively.

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Note 18 – Contingencies and Commitments

Royalty Matters

Certain customers, including Expand Energy Corporation (formerly Chesapeake Energy Corporation or Chesapeake), have been named in various lawsuits alleging underpayment of royalties and claiming, among other things, violations of anti-trust laws and the Racketeer Influenced and Corrupt Organizations Act. Williams has also been named as a defendant in certain of these cases filed in Pennsylvania based on allegations that Williams improperly participated with Chesapeake in causing the alleged royalty underpayments. Williams believes that the claims asserted are subject to indemnity obligations owed to Williams by Chesapeake, which obligations survived Chesapeake’s bankruptcy proceedings. Prior to its bankruptcy, Chesapeake reached a settlement to resolve substantially all Pennsylvania royalty cases pending. During the pendency of the bankruptcy, that settlement was renegotiated. The settlement applies to both Chesapeake and Williams and does not require any contribution from Williams. On August 23, 2021, after referral to the United States District Court for the Southern District of Texas by the bankruptcy court, the court approved the settlement. Two objectors filed an appeal with the United States Court of Appeals for the Fifth Circuit. On June 8, 2023, the Court of Appeals vacated the settlement approval and remanded to the United States District Court for the Southern District of Texas with instructions to dismiss the settlement proceedings for lack of jurisdiction. On August 31, 2023, the bankruptcy court entered an order finding the settlement agreements to be null and void. Certain plaintiffs have filed a notice of dismissal of their claims against Chesapeake that arose prior to February 8, 2021, in the United States District Court for the Middle District of Pennsylvania lawsuits. The notice states that plaintiffs are not releasing their claims against the other defendants, including Williams, or claims against Chesapeake that arose after February 9, 2021. Williams continues to believe the claims against Williams are subject to indemnity obligations owed to Williams by Chesapeake.

Rate Matters

On August 30, 2024, Transco filed a general rate case (Docket No. RP24-1035) with the FERC for an overall increase in rates and to comply with the terms of the settlement of its prior rate case to file a rate case no later than August 30, 2024. On September 30, 2024, the FERC issued an order accepting and suspending Transco’s general rate filing to be effective March 1, 2025, subject to refund and the outcome of hearing procedures established by the FERC except that rates for certain services that were proposed as overall rate decreases were accepted, without suspension, to be effective October 1, 2024. The decreased rates will not be subject to refund but may be subject to decrease prospectively under Section 5 of the Natural Gas Act of 1938 as amended.

Construction Litigation

In February 2025, Transco received an adverse judgment related to litigation in the United States Bankruptcy Court for the District of Delaware involving the contractor for the construction of Transco’s Atlantic Sunrise project completed in 2018. The total award to the contractor, estimated at $110 million, included amounts for unpaid invoices, interest, and attorney fees. Management estimates the probable loss from the judgment to be substantially less and Transco has filed a notice of appeal. Transco has capitalized the amount considered probable within noncurrent assets and expects any additional probable loss would also be capitalized. Transco also expects to recover approximately 29 percent of any amount paid from the counterparty on the project.

Environmental Matters

Williams

Williams is a participant in certain environmental activities in various stages including assessment studies, cleanup operations, and/or remedial processes at certain sites, some of which Williams currently does not own. Williams is monitoring these sites in a coordinated effort with other potentially responsible parties, the U.S. Environmental Protection Agency (EPA), or other governmental authorities. Williams is jointly and severally liable along with unrelated third parties in some of these activities and solely responsible in others. Certain of Williams’

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subsidiaries have been identified as potentially responsible parties at various Superfund and state waste disposal sites. In addition, these subsidiaries have incurred, or are alleged to have incurred, various other hazardous materials removal or remediation obligations under environmental laws. As of December 31, 2024, Williams has accrued liabilities totaling $42 million for these matters, as discussed below. Estimates of the most likely costs of cleanup are generally based on completed assessment studies, preliminary results of studies, or Williams’ experience with other similar cleanup operations. At December 31, 2024, certain assessment studies were still in process for which the ultimate outcome may yield different estimates of most likely costs. Therefore, the actual costs incurred will depend on the final amount, type, and extent of contamination discovered at these sites, the final cleanup standards mandated by the EPA or other governmental authorities, and other factors.

The EPA, other federal agencies, and various state regulatory agencies routinely propose and promulgate new rules, issue updated guidance to rules, or revise existing rules. These rulemakings include, but are not limited to, reviews and updates to the National Ambient Air Quality Standards, and promulgation of rules for new and existing source performance standards for certain equipment emitting volatile organic compound and methane as well as limitations on emissions of greenhouse gas compounds. Williams continuously monitors these regulatory changes and how they may impact its operations. Implementation of new or revised regulations may result in impacts to Williams’ operations and increase the cost of additions to Property, plant, and equipment – net in the balance sheet for both new and existing facilities in affected areas; however, due to regulatory uncertainty on final rule content or guidance and applicability timeframes, Williams is unable to reasonably estimate the cost of these regulatory impacts at this time.

Continuing operations

Williams’ interstate gas pipelines are involved in remediation and monitoring activities related to certain facilities and locations for polychlorinated biphenyls, mercury, and other hazardous substances. These activities have involved the EPA and various state environmental authorities, resulting in Williams’ identification as a potentially responsible party at various Superfund waste sites. At December 31, 2024, Williams has accrued liabilities of $12 million (see Transco and NWP below) for these costs and expect to recover approximately $4 million through rates.

Williams also accrues environmental remediation costs for natural gas underground storage facilities, primarily related to soil and groundwater contamination. At December 31, 2024, Williams has accrued liabilities totaling $7 million for these costs.

Former operations

Williams has potential obligations in connection with assets and businesses it no longer operates. These potential obligations include remediation activities at the direction of federal and state environmental authorities and the indemnification of the purchasers of certain of these assets and businesses for environmental and other liabilities existing at the time the sale was consummated. At December 31, 2024, Williams has accrued environmental liabilities of $23 million related to these matters.

Transco

Transco has had studies underway for many years to test some of its facilities for the presence of toxic and hazardous substances such as polychlorinated biphenyls (PCBs) and mercury to determine to what extent, if any, remediation may be necessary. Transco has also similarly evaluated past on-site disposal of hydrocarbons at a number of its facilities. Transco has worked closely with and responded to data requests from the EPA and state agencies regarding such potential contamination of certain of their sites. Transco is conducting environmental assessments and implementing a variety of remedial measures that may result in increases or decreases in the total estimated costs. Transco also has a program for monitoring certain environmental activities at their Eminence storage facility. At December 31, 2024, Transco has accrued liabilities of approximately $11 million for the expected ongoing remediation and monitoring costs.

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Transco has been identified as a potentially responsible party (PRP) at various Superfund and state waste disposal sites. Based on present volumetric estimates and other factors, their estimated aggregate exposure for remediation of these sites is less than $1 million. The estimated remediation costs for all of these sites are included in the environmental liabilities discussed above. Liability under the Comprehensive Environmental Response, Compensation and Liability Act and applicable state law can be joint and several with other PRPs. Although volumetric allocation is a factor in assessing liability, it is not necessarily determinative; thus, the ultimate liability could be substantially greater than the amounts described above.

Transco considers prudently incurred environmental assessment and remediation costs and the costs associated with compliance with environmental standards to be recoverable through rates. Historically, with limited exceptions, it has been permitted recovery of environmental costs, and it is Transco’s intent to continue seeking recovery of such costs through future rate filings.

NWP

Beginning in the mid-1980s, NWP evaluated many of its facilities for the presence of toxic and hazardous substances to determine to what extent, if any, remediation might be necessary. NWP identified PCB contamination in air compressor systems, soils, and related properties at certain compressor station sites. Similarly, it identified hydrocarbon impacts at these facilities due to the former use of earthen pits, lubricating oil leaks or spills, and excess pipe coating released to the environment. In addition, heavy metals have been identified at these sites due to the former use of mercury containing meters and paint and welding rods containing lead, cadmium, and arsenic. The PCBs were remediated pursuant to a Consent Decree with the EPA in the late 1980s, and NWP conducted a voluntary clean-up of the hydrocarbon and mercury impacts in the early 1990s. In 2005, the Washington Department of Ecology required NWP to re-evaluate previous clean-ups in Washington. During 2006 to 2015, 129 meter stations were evaluated, of which 82 required remediation. As of December 31, 2024, two meter stations are still being remediated. During 2006 to 2018, 14 compressor stations were evaluated, of which 11 required remediation. As of December 31, 2024, four compressor stations are still being remediated. NWP had accrued liabilities totaling approximately $1 million at December 31, 2024 for the ongoing remediation. NWP is conducting environmental assessments and implementing a variety of remedial measures that may result in increases or decreases in the total estimated costs.

Environmental expenditures are expensed or capitalized depending on their future economic benefit and potential for rate recovery. NWP believes that, with respect to any expenditures required to meet applicable standards and regulations, the FERC would grant the requisite rate relief so that substantially all of such expenditures would be permitted to be recovered through rates.

Washington State Climate Commitment Act

At December 31, 2024 and December 31, 2023, a total of $38 million and $22 million, respectively, were included in Regulatory assets in NWP’s Balance Sheet and was comprised of the cost of the purchased allowances

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held, the estimated difference between the allowances held and the allowances required, and the interest income component of the regulatory asset. At December 31, 2024 and December 31, 2023, $3 million and $4 million, respectively, were recorded in Other current liabilities on NWP’s Balance Sheet as the estimated difference. Interest income of $2 million for the year ended December 31, 2024 and $1 million for the year ended December 31, 2023 is reflected in Other income (expense) – net in NWP’s Statement of Net Income.

Other Divestiture Indemnifications

Pursuant to various purchase and sale agreements relating to divested businesses and assets, Williams has indemnified certain purchasers against liabilities that they may incur with respect to the businesses and assets acquired. The indemnities provided to the purchasers are customary in sale transactions and are contingent upon the purchasers incurring liabilities that are not otherwise recoverable from third parties.

At December 31, 2024, other than as previously disclosed, Williams is not aware of any material claims against it involving the above-described indemnities. Any claim for indemnity brought against Williams in the future may have a material adverse effect on Williams’ results of operations in the period in which the claim is made.

In addition to the foregoing, various other proceedings are pending against Williams that are incidental to its operations, none of which are expected to be material to Williams’ expected future annual results of operations, liquidity, and financial position.

Summary

Williams, Transco and NWP have disclosed estimated ranges of reasonably possible losses for certain matters above, as well as all significant matters for which they are unable to reasonably estimate a range of possible loss. Williams, Transco and NWP estimate that for all other matters for which they are able to reasonably estimate a range of loss, the aggregate reasonably possible losses beyond amounts accrued are immaterial to expected future annual results of operations, liquidity, and financial position. These calculations have been made without consideration of any potential recovery from third parties.

Commitments

Commitments for Gas & NGL Marketing Services pipeline transportation capacity and storage capacity are approximately $954 million at December 31, 2024.

Commitments for construction and acquisition of property, plant, and equipment for Williams, Transco, and NWP are approximately $155 million, $2 million, and less than $1 million, respectively at December 31, 2024.

Note 19 – Segment Disclosures

Williams

Williams’ reportable segments are Transmission & Gulf of America, Northeast G&P, West, and Gas & NGL Marketing Services. All remaining business activities are included in Other. (See Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies.)

Performance Measurement

Williams’ chief operating decision maker is the Chief Executive Officer. Williams' chief operating decision maker primarily utilizes Modified EBITDA, its measure of segment profit and loss, to evaluate performance and make decisions on capital allocation and human resources. Such evaluation includes periodic comparisons of actual performance versus historical and budget, as well as projections of Modified EBITDA.

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Williams defines Modified EBITDA as follows:

•Income (loss) before income taxes from continuing operations before:

◦Depreciation and amortization expenses;

◦Equity earnings (losses);

◦Other investing income (loss) – net;

◦Interest expense; and

◦Accretion expense associated with AROs for nonregulated operations.

•This measure is further adjusted to include Williams’ proportionate share (based on ownership interest) of Modified EBITDA from its equity-method investments calculated consistently with the definition described above.

Significant noncash items which are components of Modified EBITDA may include net unrealized gain (loss) from commodity derivatives within Total revenues, net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses for Williams’ Gas & NGL Marketing Services segment, charges associated with lower of cost or net realizable value adjustments to the Gas & NGL Marketing Services segment inventory within Product sales (for natural gas marketing inventory as these sales are presented net of the related costs) and Product costs (for NGL marketing inventory), and impairments of certain assets within Other (income) expense – net within Operating income (loss).

Intersegment Service revenues primarily represent transportation services provided to Williams’ marketing business and gathering services provided to its oil and gas properties. Intersegment Product sales primarily represent the sale of natural gas and NGLs from Williams’ natural gas processing plants and its oil and gas properties to its marketing business.

Segment assets include Investments, Property, plant, and equipment – net, and Intangible assets – net of accumulated amortization.

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The following tables present revenues, Modified EBITDA, significant expenses, and certain segment assets measures, as well as reconciliations to the consolidated totals:


	Transmission & Gulf of America		Northeast G&P		West		Gas & NGL Marketing Services (1)		Total
	(Millions)








































2024
Segment revenues:
Service revenues
External	$	4,157	$	1,900	$	1,558	$	—	$	7,615
Internal	89		13		160		—		262
Total service revenues	4,246		1,913		1,718		—		7,877
Total service revenues – commodity consideration	54		2		78		—		134
Product sales
External	144		24		178		2,500		2,846
Internal	184		86		691		(448)		513
Total product sales	328		110		869		2,052		3,359
Net gain (loss) from commodity derivatives
Realized	—		—		4		72		76
Unrealized	—		—		—		(335)		(335)
Total net gain (loss) from commodity derivatives (2)	—		—		4		(263)		(259)
Total revenues of reportable segments	$	4,628	$	2,025	$	2,669	$	1,789	$	11,111
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities									470
Net unrealized gain (loss) from commodity derivatives for upstream operations									(26)
Eliminations									(1,052)
Total consolidated revenues									$	10,503
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses	(329)		(88)		(844)		(1,799)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses	—		—		—		(6)
Operating and administrative expenses (3)	(1,104)		(441)		(591)		(108)
Recoverable power, transportation, and storage costs (4)	(250)		(143)		(49)		—
Other segment income (expenses) - net (5)	155		3		(5)		—

Proportional Modified EBITDA of equity-method investments	173		602		132		—
Modified EBITDA of reportable segments	$	3,273	$	1,958	$	1,312	$	(124)	$	6,419
Modified EBITDA from upstream operations, corporate, and other business activities									237
Total consolidated Modified EBITDA									$	6,656
Reconciliation of Modified EBITDA:
Depreciation and amortization expenses									$	(2,219)
Equity earnings (losses)									560
Other investing income (loss) - net									343
Interest expense									(1,364)
Accretion expense associated with AROs for nonregulated operations									(81)
Proportional Modified EBITDA of equity-method investments									(909)
Income (loss) before income taxes from continuing operations									$	2,986

Equity-method investments by reportable segment	$	272	$	3,346	$	476	$	—	$	4,094
Other equity-method investments									13
Total equity-method investments									$	4,107

Segment assets	$	23,149	$	12,918	$	12,144	$	46	$	48,257
Total current assets									2,661
Regulatory assets, deferred charges, and noncurrent assets									1,830
Assets of upstream operations, corporate, and other business activities									1,784
Total assets									$	54,532

Additions to long-lived segment assets	$	4,399	$	210	$	529	$	2	$	5,140
Additions to long-lived assets of upstream operations, corporate, and other business activities									458
Total additions to long-lived assets									$	5,598

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Notes (Continued)


	Transmission & Gulf of America		Northeast G&P		West		Gas & NGL Marketing Services (1)		Total
	(Millions)
2023
Segment revenues:
Service revenues
External	$	3,766	$	1,868	$	1,376	$	1	$	7,011
Internal	92		28		126		—		246
Total service revenues	3,858		1,896		1,502		1		7,257
Total service revenues – commodity consideration	38		5		103		—		146
Product sales
External	146		34		80		2,382		2,642
Internal	106		98		361		(322)		243
Total product sales	252		132		441		2,060		2,885
Net gain (loss) from commodity derivatives
Realized	2		—		89		115		206
Unrealized	—		—		—		702		702
Total net gain (loss) from commodity derivatives (2)	2		—		89		817		908
Total revenues of reportable segments	$	4,150	$	2,033	$	2,135	$	2,878	$	11,196
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities									505
Net unrealized gain (loss) from commodity derivatives for upstream operations									1
Eliminations									(795)
Total consolidated revenues									$	10,907
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses	(259)		(125)		(517)		(1,786)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses	—		—		—		(43)
Operating and administrative expenses (3)	(1,034)		(424)		(502)		(98)
Recoverable power, transportation, and storage costs (4)	(241)		(132)		(37)		—
Other segment income (expenses) - net (5)	118		(10)		(3)		(1)
Gain on sale of business (6)	129		—		—		—
Proportional Modified EBITDA of equity-method investments	205		574		162		—
Modified EBITDA of reportable segments	$	3,068	$	1,916	$	1,238	$	950	$	7,172
Modified EBITDA from upstream operations, corporate, and other business activities									307
Unallocated Net gain from Energy Transfer litigation judgment (7)									534
Total consolidated Modified EBITDA									$	8,013
Reconciliation of Modified EBITDA:
Depreciation and amortization expenses									$	(2,071)
Equity earnings (losses)									589
Other investing income (loss) - net									108
Interest expense									(1,236)
Accretion expense associated with AROs for nonregulated operations									(59)
Proportional Modified EBITDA of equity-method investments									(939)
Income (loss) before income taxes from continuing operations									$	4,405

Equity-method investments by reportable segment	$	652	$	3,477	$	477	$	—	$	4,606
Other equity-method investments									8
Total equity-method investments									$	4,614

Segment assets	$	19,705	$	13,319	$	12,188	$	77	$	45,289
Total current assets									4,513
Regulatory assets, deferred charges, and noncurrent assets									1,573
Assets of upstream operations, corporate, and other business activities									1,252
Total assets									$	52,627

Additions to long-lived segment assets	$	2,501	$	340	$	1,186	$	7	$	4,034
Additions to long-lived assets of upstream operations, corporate, and other business activities									279
Total additions to long-lived assets									$	4,313

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Notes (Continued)


	Transmission & Gulf of America		Northeast G&P		West		Gas & NGL Marketing Services (1)		Total
	(Millions)
2022
Segment revenues:
Service revenues
External	$	3,461	$	1,613	$	1,443	$	3	$	6,520
Internal	118		41		99		—		258
Total service revenues	3,579		1,654		1,542		3		6,778
Total service revenues – commodity consideration	64		14		182		—		260
Product sales
External	228		28		145		4,052		4,453
Internal	176		106		696		(518)		460
Total product sales	404		134		841		3,534		4,913
Net gain (loss) from commodity derivatives
Realized	—		—		(4)		17		13
Unrealized	—		—		—		(321)		(321)
Total net gain (loss) from commodity derivatives (2)	—		—		(4)		(304)		(308)
Total revenues of reportable segments	$	4,047	$	1,802	$	2,561	$	3,233	$	11,643
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities									626
Net unrealized gain (loss) from commodity derivatives for upstream operations									25
Eliminations									(1,329)
Total consolidated revenues									$	10,965
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses	(425)		(138)		(918)		(3,228)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses	—		—		—		47
Operating and administrative expenses (3)	(906)		(384)		(507)		(96)
Recoverable power, transportation, and storage costs (4)	(254)		(132)		(43)		—
Other segment income (expenses) - net (5)	19		(6)		(14)		4

Proportional Modified EBITDA of equity-method investments	193		654		132		—
Modified EBITDA of reportable segments	$	2,674	$	1,796	$	1,211	$	(40)	$	5,641
Modified EBITDA from upstream operations, corporate, and other business activities									434

Total consolidated Modified EBITDA									$	6,075
Reconciliation of Modified EBITDA:
Depreciation and amortization expenses									$	(2,009)
Equity earnings (losses)									637
Other investing income (loss) - net									16
Interest expense									(1,147)
Accretion expense associated with AROs for nonregulated operations									(51)
Proportional Modified EBITDA of equity-method investments									(979)
Income (loss) before income taxes from continuing operations									$	2,542

Equity-method investments by reportable segment	$	629	$	3,566	$	843	$	—	$	5,038
Other equity-method investments									10
Total equity-method investments									$	5,048

Segment assets	$	17,795	$	13,539	$	10,710	$	130	$	42,174
Total current assets									3,797
Regulatory assets, deferred charges, and noncurrent assets									1,319
Assets of upstream operations, corporate, and other business activities									1,143
Total assets									$	48,433

Additions to long-lived segment assets	$	1,420	$	261	$	1,507	$	4	$	3,192
Additions to long-lived assets of upstream operations, corporate, and other business activities									406
Total additions to long-lived assets									$	3,598

_______________________

(1) As Williams is acting as agent for natural gas marketing customers or engages in energy trading activities, the resulting revenues are presented net of the related costs of those activities.

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Notes (Continued)

(2) Williams records transactions that qualify as commodity derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses from commodity derivatives held for energy trading purposes are presented on a net basis in revenue.

(3) Segment operating and administrative expenses primarily include payroll, maintenance and operating costs and taxes, and general and administrative expenses, including acquisition and transition-related expenses. It also includes project execution, information technology, finance and accounting, real estate and aviation, central engineering services, safety and operational discipline, supply chain and digital transformation, corporate strategic development, human resources, legal and government affairs, and executive and audit support services costs which are centrally managed and allocated to segments.

(4) Recoverable power, transportation and storage costs are charges incurred which are reimbursable pursuant to FERC stipulations or customer contracts.

(5) Other segment income (expenses) primarily includes equity AFUDC and regulatory credits and charges related to Williams’ regulated operations.

(6) Gain on sale of business reflects a gain recognized on the sale of certain liquids pipelines in the Gulf Coast region in September 2023 (see Note 3 – Acquisitions and Divestitures).

(7) Net gain from Energy Transfer litigation judgment resulted from a favorable ruling in November 2023 (see Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies).

Transco

Transco manages and evaluates its business as a single reportable segment. Transco’s chief operating decision maker is the Senior Vice President, Transmission & Gulf of America. Transco’s chief operating decision maker determines resource allocation, measures and evaluates segment operating performance based upon Net income (loss) as reported on the Statement of Net Income.

Significant expenses within net income, include Operating and maintenance expenses and Selling, general, and administrative expenses, which are each separately presented on Transco’s Statement of Net Income. Other segment items within net income include natural gas product costs, depreciation and amortization expense, taxes, other than income taxes, interest expense, interest income, other income (expense) – net, and AFUDC.

Transco’s segment assets include Property, plant, and equipment – net as presented on the Balance Sheet.

NWP

NWP manages and evaluates its business as a single reportable segment. NWP’s chief operating decision maker is the Senior Vice President, Transmission & Gulf of America. NWP’s chief operating decision maker determines resource allocation, measures and evaluates segment operating performance based upon Net income (loss) as reported on the Statement of Net Income.

Significant expenses within net income, include Operating and maintenance expenses and Selling, general, and administrative expenses, which are each separately presented on NWP’s Statement of Net Income. Other segment items within net income include depreciation and amortization expense, taxes, other than income taxes, interest expense, other income (expense) – net, and AFUDC.

NWP’s segment assets include Property, plant, and equipment – net as presented on the Balance Sheet.

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Table of Contents

Notes (Continued)

Note 20 – Subsequent Events

Quarterly Dividends to Common Stockholders

On January 28, 2025, Williams’ board of directors approved a regular quarterly dividend to common stockholders of $0.500 per share payable on March 31, 2025.

Long-term Debt Issuance and Retirement

In January 2025, Williams issued $1 billion of 5.6 percent senior unsecured notes due March 15, 2035 and $500 million of 6.0 percent senior unsecured notes due March 15, 2055 (see Note 13 – Debt and Banking Arrangements). Also in January 2025, Williams retired $750 million of senior unsecured debt.

191

The Williams Companies, Inc.

Schedule II — Valuation and Qualifying Accounts


			Additions
	Beginning Balance		Charged (Credited) To Costs and Expenses		Other		Deductions		Ending Balance
	(Millions)
2024
Deferred tax asset valuation allowance (1)	$	183	$	(92)	$	—	$	—	$	91
2023
Deferred tax asset valuation allowance (1)	200		(17)		—		—		183
2022
Deferred tax asset valuation allowance (1)	297		(97)		—		—		200

__________

(1) Deducted from related assets.

192

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures

Williams

Disclosure Controls and Procedures

Williams’ management, including the Principal Executive Officer and Principal Financial Officer, does not expect that disclosure controls and procedures (as defined in Rules 13a - 15(e) and 15d - 15(e) of the Exchange Act) (Disclosure Controls) or internal control over financial reporting (Internal Controls) will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple errors or mistakes. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected. Williams monitors the Disclosure Controls and Internal Controls and makes modifications as necessary; Williams’ intent in this regard is that the Disclosure Controls and Internal Controls will be modified as systems change and conditions warrant.

Evaluation of Disclosure Controls and Procedures

An evaluation of the effectiveness of the design and operation of Williams’ Disclosure Controls was performed as of the end of the period covered by this report. This evaluation was performed under the supervision and with the participation of management, including the Principal Executive Officer and Principal Financial Officer. Based upon that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that these Disclosure Controls are effective at a reasonable assurance level.

As disclosed in Note 3 – Acquisitions and Divestitures, Williams acquired Hartree as part of the Gulf Coast Storage Acquisition on January 3, 2024. Hartree’s total revenues constituted approximately 2 percent of total revenues as shown in Williams’ consolidated financial statements for the year ended December 31, 2024. Hartree’s total assets constituted approximately 4 percent of total assets as shown in Williams’ consolidated financial statements as of December 31, 2024. Williams also acquired Crowheart on November 1, 2024, and its total revenues constituted less than 1 percent of total revenues as shown in Williams’ consolidated financial statements for the year ended December 31, 2024. Crowheart’s total assets constituted approximately 1 percent of total assets as shown in Williams’ consolidated financial statements as of December 31, 2024. Williams has excluded Hartree’s and Crowheart’s disclosure controls and procedures that are subsumed by their internal control over financial reporting from the scope of management’s assessment of the effectiveness of Williams’ disclosure controls and procedures. This exclusion is in accordance with the guidance issued by the Staff of the Securities and Exchange Commission that an assessment of recent business combinations may be omitted from management’s assessment of internal control over financial reporting for one year following the acquisition.

Changes in Internal Control Over Financial Reporting

There have been no changes during the fourth quarter of 2024 that have materially affected, or are reasonably likely to materially affect, Williams’ Internal Control over Financial Reporting.

193

Management’s Annual Report on Internal Control over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13a - 15(f) and 15d - 15(f) under the Exchange Act). Williams’ internal control over financial reporting is designed to provide reasonable assurance to management and the board of directors regarding the preparation and fair presentation of financial statements in accordance with accounting principles generally accepted in the United States. Williams’ internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of assets; (ii) provide reasonable assurance that transactions are recorded as to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures are being made only in accordance with authorization of management and the board of directors; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of assets that could have a material effect on Williams’ financial statements.

All internal control systems, no matter how well designed, have inherent limitations including the possibility of human error and the circumvention or overriding of controls. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation.

Under the supervision and with the participation of Williams’ management, including the Principal Executive Officer and Principal Financial Officer, Williams assessed the effectiveness of the internal control over financial reporting at December 31, 2024, based on the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control — Integrated Framework (2013). Based on the assessment, which excluded Hartree and Crowheart’s internal control over financial reporting as previously discussed, it was concluded that, at December 31, 2024, Williams’ internal control over financial reporting was effective.

Ernst & Young LLP, Williams’ independent registered public accounting firm, has audited the internal control over financial reporting, as stated in their report which is included in this Annual Report on Form 10-K.

194

Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of

The Williams Companies, Inc.

Opinion on Internal Control Over Financial Reporting

We have audited The Williams Companies, Inc.’s internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, The Williams Companies, Inc. (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2024, based on the COSO criteria.

As indicated in the accompanying Management’s Annual Report on Internal Control over Financial Reporting, management’s assessment of and conclusion on the effectiveness of internal control over financial reporting did not include the internal controls of Hartree Cardinal Gas, LLC, Hartree Natural Gas Storage, LLC and Crowheart Energy, LLC, which are included in the 2024 consolidated financial statements of the Company and collectively constituted approximately five percent of total assets as of December 31, 2024. Our audit of internal control over financial reporting of the Company also did not include an evaluation of the internal control over financial reporting of Hartree Cardinal Gas, LLC, Hartree Natural Gas Storage, LLC and Crowheart Energy, LLC.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheet of the Company as of December 31, 2024 and 2023, the related consolidated statements of income, comprehensive income (loss), changes in equity and cash flows for each of the three years in the period ended December 31, 2024, and the related notes and the financial statement schedule listed in the index at Item 15(a) and our report dated February 25, 2025 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

195

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Tulsa, Oklahoma

February 25, 2025

Transco

Disclosure Controls and Procedures

Transco’s management, including the Principal Executive Officer and Principal Financial Officer, does not expect that the disclosure controls and procedures (as defined in Rules 13a - 15(e) and 15d - 15(e) of the Exchange Act) (Disclosure Controls) or internal control over financial reporting (Internal Controls) will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple errors or mistakes. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected. Transco monitors the Disclosure Controls and Internal Controls and makes modifications as necessary; Transco’s intent in this regard is that the Disclosure Controls and Internal Controls will be modified as systems change and conditions warrant.

Evaluation of Disclosure Controls and Procedures

An evaluation of the effectiveness of the design and operation of Transco’s Disclosure Controls was performed as of the end of the period covered by this report. This evaluation was performed under the supervision and with the participation of management, including the Principal Executive Officer and Principal Financial Officer. Based upon that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that these Disclosure Controls are effective at a reasonable assurance level.

Changes in Internal Control Over Financial Reporting

There have been no changes during the fourth quarter of 2024 that have materially affected, or are reasonably likely to materially affect, Transco’s Internal Control over Financial Reporting.

Management’s Annual Report on Internal Control over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13a - 15(f) and 15d - 15(f) under the Exchange Act). Transco’s internal control over financial reporting is designed to provide reasonable assurance to management regarding the preparation and fair presentation of financial statements in accordance with accounting principles generally accepted in the United States. Transco’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of assets; (ii) provide reasonable assurance that transactions are recorded as to permit preparation of financial statements in accordance with generally accepted accounting principles, and that the receipts and expenditures are being made only in accordance with authorization of management; and (iii) provide reasonable assurance regarding prevention or timely

196

detection of unauthorized acquisition, use or disposition of assets that could have a material effect on Transco’s financial statements.

Under the supervision and with the participation of Transco’s management, including the Principal Executive Officer and Principal Financial Officer, Transco assessed the effectiveness of internal control over financial reporting at December 31, 2024, based on the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control — Integrated Framework (2013). Based on the assessment, it was concluded that, at December 31, 2024, Transco’s internal control over financial reporting was effective.

NWP

Disclosure Controls and Procedures

NWP’s management, including the Principal Executive Officer and Principal Financial Officer, does not expect that the disclosure controls and procedures (as defined in Rules 13a - 15(e) and 15d - 15(e) of the Exchange Act) (Disclosure Controls) or internal control over financial reporting (Internal Controls) will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple errors or mistakes. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected. NWP monitors the Disclosure Controls and Internal Controls and makes modifications as necessary; NWP’s intent in this regard is that the Disclosure Controls and Internal Controls will be modified as systems change and conditions warrant.

Evaluation of Disclosure Controls and Procedures

An evaluation of the effectiveness of the design and operation of NWP’s Disclosure Controls was performed as of the end of the period covered by this report. This evaluation was performed under the supervision and with the participation of NWP’s management, including the Principal Executive Officer and Principal Financial Officer. Based upon that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that these Disclosure Controls are effective at a reasonable assurance level.

Changes in Internal Control Over Financial Reporting

There have been no changes during the fourth quarter of 2024 that have materially affected, or are reasonably likely to materially affect, NWP’s Internal Control over Financial Reporting.

Management’s Annual Report on Internal Control over Financial Reporting

197

reasonable assurance that transactions are recorded as to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures are being made only in accordance with authorization of management; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of assets that could have a material effect on NWP’s financial statements.

Under the supervision and with the participation of NWP’s management, including the Principal Executive Officer and Principal Financial Officer, NWP assessed the effectiveness of the internal control over financial reporting at December 31, 2024, based on the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control — Integrated Framework (2013). Based on the assessment, it was concluded that, at December 31, 2024, NWP’s internal control over financial reporting was effective.

Item 9B. Other Information

During the three months ended December 31, 2024, no director or officer of Williams adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Not applicable.

PART III

Since Transco and NWP meet the conditions set forth in General Instructions (I)(1)(a) and (b) of Form 10‑K, the information required by Items 10, 11, 12, and 13, is omitted for Transco and NWP.

Item 10. Directors, Executive Officers and Corporate Governance

The information regarding Williams’ directors and nominees for director required by Item 401 of Regulation S-K will be presented under the heading “Election of Directors” in Williams’ definitive proxy statement prepared for the solicitation of proxies in connection with its Annual Meeting of Stockholders to be held April 29, 2025, which shall be filed no later than March 19, 2025 (“Proxy Statement”), which information is incorporated by reference herein.

Information regarding Williams’ executive officers required by Item 401 of Regulation S-K is presented at the end of Part I herein and captioned “Information About Williams’ Executive Officers,” as permitted by General Instruction G(3) and the Instruction to Item 401 of Regulation S-K.

Information required by paragraphs (c)(3), (d)(4) and (d)(5) of Item 407 of Regulation S-K will be included under the heading “Questions and Answers About the Annual Meeting and Voting” and “Corporate Governance” in the Proxy Statement, which information is incorporated by reference herein.

Information regarding Williams’ insider trading policy required by Item 408 of Regulation S-K will be included under the headings “Executing on Effective Corporate Governance” and “Mitigating Risk in Williams’ Compensation Programs” in the Proxy Statement, which information is incorporated by reference herein. Williams has adopted The Williams Policy on Securities Trading (“Securities Trading Policy”) that is applicable to Williams’ directors, officers, employees, and “any other person providing services to Williams who is aware of Material Nonpublic Information relating to Williams or other public companies,” as well as “family members of persons covered by this policy, others living in their households, and entities that are directed by or subject to their influence

198

or control.” A copy of the Securities Trading Policy is filed as Exhibit 19.1 to this annual report on Form 10‑K. Williams complies with applicable laws, rules, regulations and listing standards when it transacts in its own securities.

Williams’ Corporate Governance Guidelines, the charters for each of Williams’ board committees, and Williams’ Code of Business Conduct applicable to all employees, including Williams’ Chief Executive Officer, Chief Financial Officer, and Chief Accounting Officer, or persons performing similar functions, are available on Williams’ Internet website at www.williams.com. Williams will provide, free of charge, a copy of Williams’ Code of Business Conduct or any of its other corporate documents listed above upon written request to Williams’ Corporate Secretary at Williams, One Williams Center, Suite 4700, Tulsa, Oklahoma 74172. We intend to disclose any amendments to or waivers, in each case, of the Code of Business Conduct on behalf of Williams’ Chief Executive Officer, Chief Financial Officer, Chief Accounting Officer, and persons performing similar functions on the corporate governance section of Williams’ Internet website at www.williams.com, promptly following the date of any such amendment or waiver.

Item 11. Executive Compensation

The information required by Item 402 and paragraphs (e)(4) and (e)(5) of Item 407 of Regulation S-K regarding executive compensation will be presented under the headings “Compensation Discussion and Analysis,” “Executive Compensation Tables and Other Information,” “Director Compensation For Fiscal Year 2024,” “Compensation and Management Development Committee Report,” and “Compensation and Management Development Committee Interlocks and Insider Participation” in the Proxy Statement, which information is incorporated by reference herein. Notwithstanding the foregoing, the information provided under the heading “Compensation and Management Development Committee Report” in the Proxy Statement is furnished and shall not be deemed to be filed for purposes of Section 18 of the Exchange Act, is not subject to the liabilities of that section and is not deemed incorporated by reference in any filing under the Securities Act.

The information required by Item 408(x) regarding policies and practices related to the grant of certain equity awards close in time to the release of material nonpublic information will be presented under the heading “Compensation Discussion and Analysis” in the Proxy Statement, which information is incorporated by reference herein.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information regarding securities authorized for issuance under equity compensation plans required by Item 201(d) of Regulation S-K and the security ownership of certain beneficial owners and management required by Item 403 of Regulation S-K will be presented under the headings “Securities Authorized For Issuance Under Equity Compensation Plans” and “Security Ownership of Certain Beneficial Owners and Management” in the Proxy Statement, which information is incorporated by reference herein.

Item 13. Certain Relationships and Related Transactions, and Director Independence

The information regarding certain relationships and related transactions required by Item 404 and Item 407(a) of Regulation S-K will be presented under the heading “Election of Directors” in the Proxy Statement, which information is incorporated by reference herein.

Item 14. Principal Accountant Fees and Services

The information regarding Williams’ principal accounting fees and services required by Item 9(e) of Schedule 14A will be presented under the heading “Principal Accountant Fees and Services” in the Proxy Statement, which information is incorporated by reference herein. Fees for professional services provided by Transco and NWP’s independent registered public accounting firm in each of the last two fiscal years in each of the following categories are (in millions):

199

Transco


	Year Ended December 31,
	2024		2023
Audit fees	$	1	$	1
Audit-related fees	—		—
Tax fees	—		—
All other fees	—		—
Total fees	$	1	$	1

NWP


	Year Ended December 31,
	2024		2023
Audit fees	$	1	$	1
Audit-related fees	—		—
Tax fees	—		—
All other fees	—		—
Total fees	$	1	$	1

Fees for audit services include fees associated with the annual audit, the reviews for Transco and NWP’s quarterly reports on Form 10-Q, the reviews for other SEC and FERC filings, and accounting consultation.

As wholly owned subsidiaries of Williams, Transco and NWP do not have separate audit committees. The Williams Audit Committee is responsible for the appointment, compensation, retention, and oversight of Ernst & Young LLP (EY) as such appointment relates to Transco, NWP, and Williams’ other subsidiaries. The Williams Audit Committee is responsible for overseeing the determination of fees associated with EY’s audit of Transco and NWP’s financial statements. The Williams Audit Committee has established a policy regarding pre-approval of all audit and non-audit services provided by EY to Williams and its subsidiaries. On an ongoing basis, management presents specific projects and categories of service, including projects and categories of service relating to Transco and NWP, to the Williams Audit Committee to request advance approval. The Williams Audit Committee reviews those requests and advises management if the Williams Audit Committee approves the engagement of EY. On a periodic basis, management reports to the Williams Audit Committee regarding the actual spending for such projects and services compared to the approved amounts. The Williams Audit Committee may also delegate the authority to pre-approve audit and permitted non-audit services, excluding services related to internal control over financial reporting, to a subcommittee of one or more committee members, provided that any such pre-approvals are reported on at a subsequent Williams Audit Committee meeting.

200

PART IV

Item 15. Exhibits and Financial Statement Schedules

Williams

(a) 1 and 2.


			Page
Covered by report of independent auditors (PCAOB ID: 42):
Consolidated statement of income for each year in the three-year period ended December 31, 2024			96
Consolidated statement of comprehensive income (loss) for each year in the three-year period ended December 31, 2024			97
Consolidated balance sheet at December 31, 2024 and 2023			98
Consolidated statement of changes in equity for each year in the three-year period ended December 31, 2024			99
Consolidated statement of cash flows for each year in the three-year period ended December 31, 2024			100
Combined notes to financial statements			113
Schedule for each year in the three-year period ended December 31, 2024:
II — Valuation and qualifying accounts			192

All other schedules have been omitted since the required information is not present or is not present in amounts sufficient to require submission of the schedule, or because the information required is included in the financial statements and notes thereto.

(a) 3 and (b). The exhibits listed below are filed as part of this annual report.

INDEX TO EXHIBITS


Exhibit No.		Description

3.1	—	Amended and Restated Certificate of Incorporation, (filed on May 26, 2010, as Exhibit 3.(i)1 to The Williams Companies Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

3.2	—	Certificate of Designations of Series B Preferred Stock of the Williams Companies, Inc. (filed on July17, 2018, as Exhibit 3.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and Incorporated herein by reference).

3.3	—	Certificate of Amendment dated August 10, 2018 (filed on August 10, 2018, as Exhibit 3.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

3.4	—	By-laws of The Williams Companies, Inc., as last amended effective October 25, 2022 (filed on October 31, 2022, as Exhibit 3.4 to The Williams Companies Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

4.1	—	Senior Indenture, dated February 25, 1997, between MAPCO Inc. and Bank One Trust Company, N.A. (formerly The First National Bank of Chicago), as Trustee (filed on February 25, 1997, as Exhibit 4.5.1 to MAPCO Inc.’s Amendment No. l to registration statement on Form S-3 (File No. 333-20837) and incorporated herein by reference).

201


Exhibit No.		Description

4.2	—	Supplemental Indenture No. 2, dated March 5, 1997, between MAPCO Inc. and Bank One Trust Company, N.A. (formerly The First National Bank of Chicago), as Trustee (filed on March 4, 1998, as Exhibit 4(p) to MAPCO Inc.’s annual report on Form 10-K for the fiscal year ended December 31, 1997 (File No. 001-05254) and incorporated herein by reference).

4.3	—	Supplemental Indenture No. 3, dated March 31, 1998, among MAPCO Inc., Williams Holdings of Delaware, Inc. and Bank One Trust Company, N.A. (formerly The First National Bank of Chicago), as Trustee (filed on March 30, 1999, as Exhibit 4(J) to Williams Holdings of Delaware, Inc.’s annual report on Form 10-K for the fiscal year ended December 31, 1998 (File No. 000-20555) and incorporated herein by reference).

4.4	—	Fourth Supplemental Indenture, dated as of July 31, 1999, among Williams Holdings of Delaware, Inc., The Williams Companies, Inc. and Bank One Trust Company, N.A. (formerly The First National Bank of Chicago), as Trustee (filed on March 28, 2000, as Exhibit 4(q) to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

4.5	—	Fifth Supplemental Indenture, dated as of February 1, 2010, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A. (filed on February 2, 2010, as Exhibit 4.3 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.6	—	Fifth Supplemental Indenture between The Williams Companies, Inc. and Bank One Trust Company, N.A., as Trustee, dated as of January 17, 2001 (filed on March 12, 2001, as Exhibit 4(k) to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

4.7	—	Seventh Supplemental Indenture, dated March 19, 2002, between The Williams Companies, Inc. as Issuer and Bank One Trust Company, National Association, as Trustee (filed on May 9, 2002, as Exhibit 4.1 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

4.8	—	Eleventh Supplemental Indenture, dated as of February 1, 2010, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A. (filed on February 2, 2010, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.9	—	Indenture, dated December 18, 2012, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A. as trustee (filed on December 20, 2012, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.10	—	Second Supplemental Indenture, dated as of June 24, 2014, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on June 24, 2014, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.11	—	Third Supplemental Indenture, dated as of May 14, 2020, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on May 14, 2020, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.12	—	Fourth Supplemental Indenture, dated as of March 2, 2021, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on March 2, 2021, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

202


Exhibit No.		Description

4.13	—	Fifth Supplemental Indenture, dated as of October 8, 2021, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on October 8, 2021, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.14	—	Sixth Supplemental Indenture, dated as of August 8, 2022, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on August 8, 2022, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.15	—	Seventh Supplemental Indenture, dated as of March 2, 2023, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on March 2, 2023, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.16	—	Eighth Supplemental Indenture, dated as of August 10, 2023, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on August 10, 2023, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.17	—	Ninth Supplemental Indenture, dated as of January 5, 2024, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on January 5, 2024, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.18	—	Tenth Supplemental Indenture, dated as of August 13 , 2024, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on August 13 , 2024, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.19	—	Eleventh Supplemental Indenture, dated as of January 9 , 202 5 , between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on January 10 , 202 5 , as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.20	—	Indenture, dated as of February 9, 2010, between Williams Partners L.P. and The Bank of New York Mellon Trust Company, N.A. (filed on February 10, 2010, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.21	—	First Supplemental Indenture, dated as of February 2, 2015, between Williams Partners L.P. and The Bank of New York Mellon Trust Company, N.A. (filed on February 3, 2015, as Exhibit 4.5 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-34831) and incorporated herein by reference).

4.22	—	Second Supplemental Indenture, dated as of August 10, 2018, between The Williams Companies, Inc. and The Bank of New York Mellon Trust Company, N.A. (filed on August 10, 2018, as Exhibit 4.2 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.23	—	Indenture, dated as of November 9, 2010, between Williams Partners L.P. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on November 12, 2010, as Exhibit 4.1 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-32599) and incorporated herein by reference).

203


Exhibit No.		Description

4.24	—	Fifth Supplemental Indenture, dated as of March 4, 2014, between Williams Partners L.P. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on March 4, 2014, as Exhibit 4.1 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-32599) and incorporated herein by reference).

4.25	—	S ixth Supplemental Indenture, dated as of June 27, 2014, between Williams Partners L.P. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on June 27, 2014, as Exhibit_4.1 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-32599) and incorporated herein by reference).

4.26	—	S eventh Supplemental Indenture, dated as of February 2, 20 15, between Williams Partners L.P. and The Bank of New York Mellon Trust Company, N.A. (filed on February 3, 2015, as Exhibit_4.4 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-34831) and incorporated herein by reference).

4.27	—	Eighth Supplemental Indenture, dated as of March 3, 2015, between Williams Partners L.P. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on March 3, 2015, as Exhibit 4.1 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-34831) and incorporated herein by reference).

4.28	—	Ninth Supplemental Indenture, dated as of June 5, 2017, between Williams Partners L.P. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on June 5, 2017, as Exhibit 4.1 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-34831) and incorporated herein by reference).

4.29	—	Tenth Supplemental Indenture, dated as of March 5, 2018, between Williams Partners L.P. and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on March 5, 2018, as Exhibit 4.1 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-34831) and incorporated herein by reference).

4.30	—	Eleventh Supplemental Indenture, dated as of August 10, 2018, between The Williams Companies Inc. and The Bank of New York Mellon Trust Company, N.A. (filed on August 10, 2018, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.31	—	Senior Indenture, dated as of November 30, 1995, between Northwest Pipeline Corporation and Chemical Bank, Trustee (filed September 14, 1995, as Exhibit 4.1 to Northwest Pipeline’s registration statement on Form S-3 (File No. 033-62639) and incorporated herein by reference).

4.32	—	Indenture, dated as of April 3, 2017, between Northwest Pipeline LLC and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on April 3, 2017, as Exhibit 4.1 to Northwest Pipeline’s current report on Form 8-K (File No. 001-07414) and incorporated herein by reference).

4.33	—	Senior Indenture, dated as of July 15, 1996, between Transcontinental Gas Pipe Line Corporation and Citibank, N.A., as Trustee (filed on April 2, 1996, as Exhibit 4.1 to Transcontinental Gas Pipe Line Corporation’s registration statement on Form S-3 (File No. 333-02155) and incorporated herein by reference).

4.34	—	Indenture, dated as of August 12, 2011, between Transcontinental Gas Pipe Line Company, LLC and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on August 12, 2011, as Exhibit 4.1 to Transcontinental Gas Pipe Line Company, LLC’s current report on Form 8-K (File No. 001-07584) and incorporated herein by reference).

4.35	—	Indenture, dated as of July 13, 2012, between Transcontinental Gas Pipe Line Company, LLC and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on July 16, 2012 as Exhibit 4.1 to Transcontinental Gas Pipe Line Company, LLC’s current report on Form 8-K (File No. 001-07584) and incorporated herein by reference).

204


Exhibit No.		Description

4.36	—	Indenture, dated as of January 22, 2016, between Transcontinental Gas Pipe Line Company, LLC and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on January 22, 2016, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.37	—	Indenture, dated as of March 15, 2018, between Transcontinental Gas Pipe Line Company, LLC and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on March 15, 2018, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.38	—	Indenture, dated as of May 8, 2020, between Transcontinental Gas Pipe Line Company, LLC and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on May 8, 2020, as Exhibit 4.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

4.39	—	Indenture, dated August 17, 1998, between Questar Pipeline Company and Wells Fargo Bank, N.A., as successor trustee (filed on August 17, 1998, as Exhibit 4.01 to the Questar Pipeline Company ’s Registration Statement on Form S-3 (File No. 333-61621) and incorporated herein by reference.

4.40	—	Officer’s Certificate (including the form of Questar Pipeline Company’s 4.875% Senior Notes due 2041) (filed on December 6, 2011, as Exhibit 4.1 to the Questar Pipeline Company ’s current report on Form 8-K (File No. 001-14147) and incorporated herein by reference).

4.41	—	Dominion Energy Questar Pipeline Note Purchase Agreement (filed on February 21, 2024, as Exhibit 4.39 to The W illiams Companies, Inc .’s annual report on Form 10-K (File No. 001 -04174) and incorporated herein by reference).

4.42	—	Description of Securities.

10.1§	—	The Williams Companies Amended and Restated Retirement Restoration Plan amended effective as of January 1, 2024 , (filed on February 21, 2024, as Exhi bit 10.1 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.2§	—	Form of Director and Officer Indemnification Agreement (filed on September 24, 2008, as Exhibit 10.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

10.3§	—	Form of 2013 Restricted Stock Unit Agreement among Williams and certain nonmanagement directors (filed on February 26, 2014, as Exhibit 10.11 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.4§	—	Form of 2014 Nonqualified Stock Option Agreement among Williams and certain employees and officers (filed on February 26, 2014, as Exhibit 10.8 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.5§	—	Form of 2014 Restricted Stock Unit Agreement among Williams and certain nonmanagement directors (filed on February 25, 2015, as Exhibit 10.12 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.6§	—	Form of 2015 Time-Based Restricted Stock Unit Agreement among Williams and certain employees and officers (filed on February 25, 2015, as Exhibit 10.16 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.7§	—	Form of 2015 Nonqualified Stock Option Agreement among Williams and certain employees and officers (filed on February 25, 2015, as Exhibit 10.17 to The Williams Companies, Inc .’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

205


Exhibit No.		Description

10.8§	—	Form of 2016 Time-Based Restricted Stock Unit Agreement among Williams and certain non-management directors (filed on February 22, 2017, as Exhibit 10.21 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.9§	—	Form of 2016 Nonqualified Stock Option Agreement among Williams and certain employees and officers (filed on February 22, 2017, as Exhibit 10.22 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.10§	—	Form of 2017 Time-Based Restricted Stock Unit Agreement among Williams and certain non-management directors (filed on February 22, 2017, as Exhibit 10.24 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.11§	—	Form of 2017 Nonqualified Stock Option Agreement among Williams and certain employees and officers (filed on February 22, 2017, as Exhibit 10.25 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.12	—	Form of 2018 Nonqualified Stock Option Agreement among Williams and certain employees and officers (filed on May 3, 2018, as Exhibit 10.5 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

10.13§	—	Form of 2018 Time-Based Restricted Stock Unit Agreement among Williams and certain non-management directors (filed on August 2, 2018, as Exhibit 10.2 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

10.14§	—	Form of 2019 Time-Based Restricted Stock Unit Agreement among Williams and certain non-management directors (filed on May 2, 2019, as Exhibit 10.4 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

10.15§	—	Form of 2020 Time-Based Restricted Stock Unit Agreement among The Williams Companies, Inc. and certain non-management directors (filed on May 4, 2020, as Exhibit 10.4 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

10.16§	—	Form of Amended 2021 Time-Based Restricted Stock Unit Agreement between The Williams Companies, Inc. and certain employees and officers (filed on November 1, 2021, as Exhibit 10.7 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

10.17§	—	Form of 2021 Performance-Based Restricted Stock Unit Agreement between The Williams Companies, Inc. and certain employees and officers (filed on May 3, 2021, as Exhibit 10.1 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

10.18§	—	Form of Amended 2021 Performance-Based Restricted Stock Unit Agreement between The Williams Companies, Inc. and certain employees and officers (filed on November 1, 2021, as Exhibit 10.8 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

10.19§	—	Form of 2021 Time-Based Restricted Stock Unit Agreement among The Williams Companies, Inc. and certain employees and officers (filed on February 24, 2021, as Exhibit 10.28 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.20§	—	Form of Time-Based Restricted Stock Unit Agreement among The Williams Companies, Inc. and certain employees and officers (filed on February 28, 2022, as Exhibit 10.31 to The Williams Companies, Inc.’s annual rep ort on Form 10-K (File No.001-04174) and incorporated herein by reference).

206


Exhibit No.		Description

10.21§	—	Form of Time-Based Restricted Stock Unit Agreement among The Williams Companies, Inc. and certain non-management directors (filed on February 24, 2021, as Exhibit 10.29 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.22§	—	Form of Performance-Based Restricted Stock Unit Agreement among The Williams Companies, Inc. and certain employees and officers (filed on February 28, 2022, as Exhibit 10.33 to The Williams Companies, Inc.’s annual report on Form 10-K (File No.001-04174) and incorporated herein by reference.

10.23§	—	Form of Two-Year Ratable Restricted Stock Unit Agreement among The Williams Companies, Inc. and certain employees and officers (filed on May 3, 2023, as Exhibit 10.1 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference.

10.24§	—	Form of Three-Year Ratable Restricted Stock Unit Agreement among The Williams Companies, Inc. and certain employees and officers (filed on May 3, 2023, as Exhibit 10.2 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference.

10.25§	—	Change in Control and Restrictive Covenant Agreement between certain executive officers (Tier One Executives) and The Williams Companies, Inc. (filed on February 24, 2020, as Exhibit 10.29 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.26§	—	Change in Control and Restrictive Covenant Agreement between certain executive officers (Tier Two Executives) and The Williams Companies, Inc. (filed on February 24, 2020, as Exhibit 10.30 to The Williams Companies, Inc.’s annual report on Form 10-K (File No. 001-04174) and incorporated herein by reference).

10.27§	—	The Williams Companies, Inc. Executive Severance Pay Plan, as amended and restated, effective August 1, 2022 (filed October 31, 2022, as Exhibit 10.1 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

10.28§	—	The Williams Companies, Inc. 2007 Incentive Plan as amended and restated effective October 26, 2021 (filed on November 1, 2021, as Exhibit 10.9 to The Williams Companies, Inc.’s quarterly report on Form 10-Q (File No. 001-04174) and incorporated herein by reference).

10.29	—	Amended and Restated Credit Agreement dated as of October 8, 2021, between The Williams Companies, Inc., Northwest Pipeline LLC, and Transcontinental Gas Pipe Line Company, LLC, as borrowers, the lenders named therein, and Wells Fargo Bank, National Association, as Administrative Agent (filed on October 8, 2021, as Exhibit 10.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

10.30	—	Form of Commercial Paper Dealer Agreement, dated as of August 10, 2018, between The Williams Companies, Inc., as Issuer, and the Dealer party thereto (filed on August 10, 2018, as Exhibit 10.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

19.1*	—	Williams Policy on Securities Trading.

21*	—	Subsidiaries of the registrant.

23.1*	—	Consent of Independent Registered Public Accounting Firm, Ernst & Young LLP.

31.1*	—	Certification of the Chief Executive Officer pursuant to Rules 13a-l4(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, and Item 601(b)(3l) of Regulation S-K, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

207


Exhibit No.		Description

31.2*	—	Certification of the Chief Financial Officer pursuant to Rules 13a-14(a) and l5d-l4(a) promulgated under the Securities Exchange Act of 1934, as amended, and Item 601(b)(31) of Regulation S-K, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1**	—	Certification of the Chief Executive Officer and the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

97.1	—	The Williams Companies, Inc. Financial Statement Compensation Recoupment Polic y (filed on Fe bruary 21, 2024, as Exhibit 97.1 to The Williams Compan ies, Inc .’s current report on Form 10-K (File No. 001-04174) and incorporated herein by reference ).

101.INS*	—	XBRL Instance Document. The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the inline XBRL document.

101.SCH*	—	XBRL Taxonomy Extension Schema.

101.CAL*	—	XBRL Taxonomy Extension Calculation Linkbase.

101.DEF*	—	XBRL Taxonomy Extension Definition Linkbase.

101.LAB*	—	XBRL Taxonomy Extension Label Linkbase.

101.PRE*	—	XBRL Taxonomy Extension Presentation Linkbase.

104*	—	Cover Page Interactive Data File. The cover page interactive data file does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document (contained in Exhibit 101).


______________
*			Filed herewith
**			Furnished herewith
§			Management contract or compensatory plan or arrangement

208

Transco

(a) 1 and 2.


			Page
Covered by report of independent auditors (PCAOB ID: 42):
Statement of net income for each year in the three-year period ended December 31, 2024			103
Balance sheet at December 31, 2024 and 2023			104
Statement of changes in member’s equity for each year in the three-year period ended December 31, 2024			105
Statement of cash flows for each year in the three-year period ended December 31, 2024			106
Combined N otes to F inancial S tatements			113

(a) 3 and (b). The exhibits listed below are filed as part of this annual report.

INDEX TO EXHIBITS


Exhibit No.		Description

2	—	Certificate of Conversion dated December 22, 2008 and effective December 31, 2008 (filed on February 24, 2011 as Exhibit 2.1 to our annual report on Form 10-K (File No. 001-07584) and incorporated herein by reference).

3.5	—	Certificate of Formation executed as of December 22, 2008 and effective December 31, 2008 (filed on February 24, 2011 as Exhibit 3.1 to our annual report on Form 10-K (File No. 001-07584) and incorporated herein by reference).

3.6	—	Amended and Restated Operating Agreement of Transcontinental Gas Pipe Line Company, LLC dated February 17, 2010 (filed on October 28, 2010 as Exhibit 3.2 to our quarterly report on Form 10-Q (File No. 001-07584) and incorporated herein by reference).

4.43	—	Senior Indenture dated July 15, 1996 between Transcontinental Gas Pipe Line Corporation and Citibank, N.A., as Trustee (filed on April 2, 1996 as Exhibit 4.1 to our registration statement Form S-3 (File No. 333-02155) and incorporated herein by reference).

4.44	—	Indenture, dated as of August 12, 2011 between Transcontinental Gas Pipe Line Company, LLC and The Bank of New York Mellon Trust Company, N.A., as Trustee (filed on August 12, 2011 as Exhibit 4.1 to our current report on Form 8-K (File No. 001-07584) and incorporated herein by reference).

4.45	—	Indenture, dated as of July 13, 2012, between Transcontinental Gas Pipe Line Company, LLC and The Bank of New York Mellon Trust Company, N.A., as Trustee (filed on July 16, 2012 as Exhibit 4.1 to our current report Form 8-K (File No. 001-07584) and incorporated herein by reference).

4.46	—	Indenture, dated as of January 22, 2016, between Transcontinental Gas Pipe Line Company, LLC and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on January 22, 2016 as Exhibit 4.1 to our current report on Form 8-K (File No. 001-07584) and incorporated herein by reference).

4.7	—	Indenture, dated as of March 15, 2018, between Transcontinental Gas Pipe Line Company, LLC and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on March 15, 2018 as Exhibit 4.1 to our current report on Form 8-K (File No. 001-07584) and incorporated herein by reference).

209


Exhibit No.		Description


4.48	—	Indenture, dated as of May 8, 2020, between Transcontinental Gas Pipe Line Company, LLC and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on May 8, 2020 as Exhibit 4.1 to our current report on Form 8-K (File No. 001-07584) and incorporated herein by reference).

10.31	—	Administrative Services Agreement, dated as of February 17, 2010, by and between Transco Pipeline Services LLC and Transcontinental Gas Pipe Line Company, LLC (filed on February 22, 2010 as Exhibit 10.3 to Williams Partners L.P.’s, Form 8-K (File No. 001-32599) and incorporated herein by reference).

10.32	—	Assignment Agreement dated February 13, 2013 by and between Transco Pipeline Services LLC and Williams WPC-I, LLC, effective January 1, 2013 (filed on February 27, 2013 as Exhibit 10.2 to our annual report on Form 10-K (File No. 001-07584) and incorporated herein by reference).

10.33	—	Amended and Restated Credit Agreement dated as of October 8, 2021 between The Williams Companies, Inc., Northwest Pipeline LLC, and Transcontinental Gas Pipeline Company, LLC, as co-borrowers, the lenders named therein, and Wells Fargo Bank, National Association, as Administrative Agent (filed on October 8, 2021 as Exhibit 10.1 to The Williams Companies, Inc.’s Current Report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

31.3*	—	Certification of the Principal Executive Officer pursuant to Rules 13a-l4(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, and Item 601(b)(3l) of Regulation S-K, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.4*	—	Certification of the Principal Financial Officer pursuant to Rules 13a-14(a) and l5d-l4(a) promulgated under the Securities Exchange Act of 1934, as amended, and Item 601(b)(31) of Regulation S-K, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.2**	—	Certification of the Principal Executive Officer and the Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

101.INS*	—	XBRL Instance Document. The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the inline XBRL document.

101.SCH*	—	XBRL Taxonomy Extension Schema.

101.CAL*	—	XBRL Taxonomy Extension Calculation Linkbase.

101.DEF*	—	XBRL Taxonomy Extension Definition Linkbase.

101.LAB*	—	XBRL Taxonomy Extension Label Linkbase.

101.PRE*	—	XBRL Taxonomy Extension Presentation Linkbase.

104*	—	Cover Page Interactive Data File. The cover page interactive data file does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document (contained in Exhibit 101).


______________
*			Filed herewith
**			Furnished herewith

210

NWP

(a) 1 and 2.


			Page
Covered by report of independent auditors (PCAOB ID: 42):
Statement of net income for each year in the three-year period ended December 31, 2024			109
B alance sheet at December 31, 202 4 and 20 23			110
S tatement of changes in member ’s equity for each year in the three-year period ended December 31, 202 4			111
S tatement of cash flows for each year in the three-year period ended December 31, 202 4			112
Combined N otes to F inancial S tatements			113

(a) 3 and (b). The exhibits listed below are filed as part of this annual report.

INDEX TO EXHIBITS


Exhibit No.		Description

2.1	—	Certificate of Conversion of Northwest Pipeline GP (filed on July 3, 2013 as Exhibit 2.1 to our current report on Form 8-K (File No. 001-07414) and incorporated herein by reference).

3.7	—	Certificate of Formation of Northwest Pipeline LLC (filed on July 3, 2013 as Exhibit 2.2 to our current report on Form 8-K (File No. 001-07414) and incorporated herein by reference).

3.8	—	Operating Agreement of Northwest Pipeline LLC (filed on July 3, 2013 as Exhibit 3.1 to our current report on Form 8-K (File No. 001-07414) and incorporated herein by reference).

4.49	—	Senior Indenture, dated as of November 30, 1995 between Northwest Pipeline Corporation and Chemical Bank, relating to Northwest Pipeline’s 7.125% Debentures due 2025 (filed on September 14, 1995 as Exhibit 4.1 to our registration statement on Form S-3 (File No. 033-62639) and incorporated herein by reference).

4.50	—	Indenture, dated as of April 3, 2017, between Northwest Pipeline LLC and The Bank of New York Mellon Trust Company, N.A., as trustee (filed on April 3, 2017 as Exhibit 4.1 to our current report on Form 8-K (File No. 001-07414) and incorporated herein by reference).

10.34	—	Administrative Services Agreement, dated January 24, 2008, between Northwest Pipeline GP and Northwest Pipeline Services LLC (filed on January 30, 2008 as Exhibit 10.1 to our current report on Form 8-K (File No. 001-07414) and incorporated herein by reference).

10.35	—	Assignment Agreement dated February 13, 2013, by and between Northwest Pipeline Services LLC and Williams WPC-I, LLC, effective January 1, 2013 (filed on February 3, 2015 as Exhibit 10(b) to our annual report on Form 10-K (File No. 001-07414) and incorporated herein by reference).

10.36	—	Amended and Restated Credit Agreement dated as of October 8, 2021 between The Williams Companies, Inc., Northwest Pipeline LLC, and Transcontinental Gas Pipeline Company, LLC, as borrowers, the lenders named therein, and Wells Fargo Bank, National Association, as Administrative Agent (filed on October 8, 2021 as Exhibit 10.1 to The Williams Companies, Inc.’s current report on Form 8-K (File No. 001-04174) and incorporated herein by reference).

211


Exhibit No.		Description

31.5*	—	Certification of the Principal Executive Officer pursuant to Rules 13a-l4(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, and Item 601(b)(3l) of Regulation S-K, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.6*	—	Certification of the Principal Financial Officer pursuant to Rules 13a-14(a) and l5d-l4(a) promulgated under the Securities Exchange Act of 1934, as amended, and Item 601(b)(31) of Regulation S-K, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.3**	—	Certification of the Principal Executive Officer and the Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

101.INS*	—	XBRL Instance Document. The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the inline XBRL document.

101.SCH*	—	XBRL Taxonomy Extension Schema.

101.CAL*	—	XBRL Taxonomy Extension Calculation Linkbase.

101.DEF*	—	XBRL Taxonomy Extension Definition Linkbase.

101.LAB*	—	XBRL Taxonomy Extension Label Linkbase.

101.PRE*	—	XBRL Taxonomy Extension Presentation Linkbase.

104*	—	Cover Page Interactive Data File. The cover page interactive data file does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document (contained in Exhibit 101).


______________
*			Filed herewith
**			Furnished herewith

212

Item 16. Form 10-K Summary

Not applicable.

213

The Williams Companies, Inc.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


THE WILLIAMS COMPANIES, INC. (Registrant)

By:						/s/ MARY A. HAUSMAN
						Mary A. Hausman Vice President, Chief Accounting Officer and Controller

Date: February 25, 2025

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature

Title

Date

/s/ ALAN S. ARMSTRONG

President, Chief Executive Officer and Director

February 25, 2025

Alan S. Armstrong

(Principal Executive Officer)

/s/ JOHN D. PORTER

Senior Vice President and Chief Financial Officer

February 25, 2025

John D. Porter

(Principal Financial Officer)

/s/ MARY A. HAUSMAN

Vice President, Chief Accounting Officer and Controller

February 25, 2025

Mary A. Hausman

(Principal Accounting Officer)

/s/ STEPHEN W. BERGSTROM

Chairman of the Board

February 25, 2025

Stephen W. Bergstrom

/s/ MICHAEL A. CREEL

Director

February 25, 2025

Michael A. Creel

/s/ STACEY H. DORÉ

Director

February 25, 2025

Stacey H. Doré

/s/ CARRI A. LOCKHART

Director

February 25, 2025

Carri A. Lockhart

/s/ RICHARD E. MUNCRIEF

Director

February 25, 2025

Richard E. Muncrief

/s/ PETER A. RAGAUSS

Director

February 25, 2025

Peter A. Ragauss

/s/ ROSE M. ROBESON

Director

February 25, 2025

Rose M. Robeson

214

Signature

Title

Date

/s/ SCOTT D. SHEFFIELD

Director

February 25, 2025

Scott D. Sheffield

/s/ MURRAY D. SMITH

Director

February 25, 2025

Murray D. Smith

/s/ WILLIAM H. SPENCE

Director

February 25, 2025

William H. Spence

/s/ JESSE J. TYSON

Director

February 25, 2025

Jesse J. Tyson

215

Transcontinental Gas Pipe Line Company, LLC

SIGNATURES


TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC (Registrant)

By:						/s/ BILLEIGH W. MARK
						Billeigh W. Mark Controller

Date: February 25, 2025

Signature

Title

Date

/s/ CHAD A. TEPLY

Management Committee Member and

Senior Vice President

February 25, 2025

Chad A. Teply

(Principal Executive Officer)

/s/ MARY A. HAUSMAN

Vice President and Chief Accounting Officer

February 25, 2025

Mary A. Hausman

(Principal Financial Officer)

/s/ BILLEIGH W. MARK

Controller

February 25, 2025

Billeigh W. Mark

(Principal Accounting Officer)

216

Northwest Pipeline LLC

SIGNATURES


NORTHWEST PIPELINE LLC (Registrant)

By:						/s/ BILLEIGH W. MARK
						Billeigh W. Mark Controller

Date: February 25, 2025

Signature

Title

Date

/s/ CHAD A. TEPLY

Management Committee Member and

Senior Vice President

February 25, 2025

Chad A. Teply

(Principal Executive Officer)

/s/ MARY A. HAUSMAN

Vice President and Chief Accounting Officer

February 25, 2025

Mary A. Hausman

(Principal Financial Officer)

/s/ BILLEIGH W. MARK

Controller

February 25, 2025

Billeigh W. Mark

(Principal Accounting Officer)

217

Exhibit 19.1

WILLIAMS

POLICY ON SECURITIES TRADING

Effective July 25, 2023

______________________________________________________________________________

Introduction

During the course of our employment, we periodically become aware of confidential and highly sensitive information concerning Williams (defined below) and other companies. Federal and state securities laws impose severe civil and criminal penalties on persons involved in insider trading, in other words, persons who trade in securities while aware of Material Nonpublic Information (defined below).

The securities laws apply not only to persons such as our Directors (defined below) and officers, but also to any employee who is aware of such information and trades securities with such information. Persons who “tip” or pass along Material Nonpublic Information to others (including family members) and those who subsequently trade after receiving the tipped information also violate the securities laws.

Maintaining the confidence of stockholders and the public markets is important. The principle underlying this policy is fairness in dealings with other persons, which requires that Williams’ affiliates not take personal advantage of undisclosed information to the detriment of others who do not have the information. Accordingly, this policy is designed to prevent insider trading or allegations of insider trading, and to protect Williams’ reputation for integrity and ethical conduct. It is your obligation to understand and comply with this policy. If you have any questions regarding this policy, you should contact the Corporate Secretary at CorporateSecretary@Williams.com.

Definitions

“Broker-assisted Cashless Exercise” means a transaction in which, at the instruction of the holder of a stock option, a broker sells some or all of the shares underlying the stock option on the open market for the purpose of paying the stock option purchase price or for the payment of taxes.

“Director” means a member of the Board of Directors of The Williams Companies, Inc.

“ESPP” means The Williams Companies, Inc. Amended and Restated 2007 Employee Stock Purchase Plan, as may be further amended from time to time, or any successor plan thereto.

“Executive Officer” means a Williams officer who is a reporting person under Section 16 of the Securities Exchange Act of 1934, as amended (“Section 16”).

“Material Nonpublic Information” is a two-part definition explained as follows:

(i)“Material” information refers to any information that a reasonable investor would consider important in making a decision to buy, sell, gift or otherwise transfer,

hold or vote securities, given the total mix of available information in the marketplace. In simple terms, material information is any type of information that could reasonably be expected to affect the price of a security (e.g., the stock price for a share of Williams common stock). A few examples of the many types of information considered material include:

•earnings announcements or estimates or other unpublished financial results;

•projections or changes in projections of earnings or losses or other material financial information;

•news of a pending or proposed merger, acquisition, divestiture, or joint venture;

•a pending or proposed public offering, private placement, repurchase, or redemption of Williams Securities or other important financing transactions, developments, or events;

•changes in dividend policies or the declaration of a stock split;

•major litigation, government action, or developments related thereto;

•changes in senior management;

•impending bankruptcy or financial liquidity problems (including those of a customer);

•internal financial information that departs from what the market would expect; and

•the gain or loss of (or other significant event relating to) a major customer or contract.

(ii)“Nonpublic” information is information that has not been disclosed to the general public. This sort of information only becomes public after it is released to the public and the market has had time to absorb and adjust to the information. Effective disclosure of such information comes through public filings with the Securities Exchange Commission, formal press releases, and during pre-announced meetings or conference calls with analysts or the press that are publicly accessible.

“Net Exercise” means the use of the underlying shares, which are surrendered to Williams, to pay the exercise price and/or tax withholding obligations in respect of a stock option exercise.

“Restricted Employee” means a Williams employee listed on our Insider Trading – Director and Key Employees List. Such list is maintained by our Corporate Secretary Group, which will notify an employee that he/she is on the list. Such list is typically comprised of employees who, during the normal course of their employment, are in a position to gain Material Nonpublic Information with respect to quarterly or annual financial results, guidance, or other significant corporate events such as material mergers and acquisitions.

“Section 16” means Section 16 of the Securities Exchange Act of 1934, as amended.

“Williams” means, collectively, The Williams Companies, Inc. and its respective subsidiaries.

Page 2 of 10

“Williams Securities” means all securities of Williams, including without limitation, common stock, preferred stock, debt, stock options, and any other derivative or non-derivative securities that Williams may issue from time to time, as well as derivative securities relating to Williams stock that are not issued by Williams, such as exchange-traded put or call options, or swaps. For the avoidance of doubt, the term Williams Securities also includes (i) equity awards (including restricted stock units) or stock options granted as compensation under any of Williams’ compensation or benefit plans and (ii) upon the vesting of such awards or the exercise of such options, the securities so acquired, such as Williams common stock.

Securities Trading

No Director, officer, employee, or any other person providing services to Williams who is aware of Material Nonpublic Information relating to Williams or other public companies may buy, sell, gift or pledge Williams Securities or such other companies’ securities, including derivative securities thereof, or pass such information on to others. The same restrictions apply to family members of persons covered by this policy, others living in their households, and entities that are directed by or subject to their influence or control.

•You must not trade in Williams Securities or any derivative thereof while you possess (i.e., are aware of) Material Nonpublic Information about Williams.

•You must not trade in the securities or any derivative thereof of other public companies while you possess (i.e., are aware of) Material Nonpublic Information concerning such other public companies, including those obtained in the course of your relationship with Williams.

•You must not pass (or “tip”) Material Nonpublic Information on to others or recommend to anyone the purchase or sale of any Williams Securities or securities of other public companies when you are aware of such information.

•You must not hold Williams Securities in a margin account or pledge Williams Securities as collateral for a loan.

•You must not engage in short sales of Williams Securities or in hedging transactions or speculative transactions involving Williams Securities, including, but not limited to, option contracts, puts, calls, straddles, collars, hedges, swaps, forward contracts, exchange funds, or any transactions that hedge or offset, or are designed to hedge or offset, any decrease in the market value of Williams Securities.

Covered Transactions

Transactions covered by this policy include all buying, selling, pledging, the making of gifts or charitable donations, and all other transactions in Williams Securities; provided however, that the following transactions are not covered by and are therefore permitted under this policy:

•the exercise of Williams stock options if no shares are to be sold (i.e., exercise and hold) or if there is a Net Exercise;

•the vesting of Williams stock options or restricted stock units; and

•the withholding of shares by Williams to satisfy a tax withholding obligation upon the vesting of restricted stock units or the exercise of stock options.

Page 3 of 10

Therefore, at any time and without preclearance you may freely exercise stock options, and not violate this policy, if such stock option exercise is accomplished via either an exercise and hold or a Net Exercise. However, because it involves a sale of shares into the open market, a Broker-assisted Cashless Exercise is covered by and remains subject to the terms of this policy including, if applicable to the option holder, exercising only during an open trading window after obtaining preclearance. The method of stock option exercise is directed by and at the discretion of the individual, and the Company does not have discretion with respect to the method of stock option exercise.

Special Note Regarding the ESPP: This policy, including the blackout provision, does not apply to recurring periodic purchases of Williams common stock in the ESPP. However, this policy does apply to any: (a) election to participate in the ESPP for an enrollment period (i.e. you may not enroll when you are in possession of Material Nonpublic Information); (b) increase or decrease in your amount of periodic contributions to the ESPP; and (c) sales of Williams common stock purchased pursuant to the ESPP.

Consequences of Non-Compliance

Punishment for insider trading violations by federal and state authorities is severe and could include significant fines and imprisonment, including civil penalties up to three times the profit gained or loss avoided, a criminal fine of up to $5,000,000, and a jail term of up to twenty years. The securities laws also impose potential liability on companies and other “controlling persons” if they fail to take reasonable steps to prevent insider trading by company personnel. In addition, you could be subject to disciplinary action by Williams, including dismissal, for any conduct prohibited by this policy.

Determination of Material Nonpublic Information

In all cases, the responsibility for determining whether an individual is in possession of Material Nonpublic Information rests with the individual. However, if you are uncertain if you possess Material Nonpublic Information, or whether a particular transaction is covered by this policy, you should consult with the Corporate Secretary at CorporateSecretary@Williams.com prior to trading.

Blackout Period

In addition to the general rules prohibiting trading while in possession of Material Nonpublic Information, trading in Williams Securities by (i) Directors, (ii) Executive Officers, and (iii) Restricted Employees is not permitted (i.e. a trading black out exists) during the period beginning on the 15th day of the last month of a financial quarter and ending one full trading day after quarterly or annual earnings are released. Williams’ position is that you may not attempt to “beat the market” by trading simultaneously with, or shortly after, the official release of what was, prior to its release, Material Nonpublic Information. Although there is no fixed period for how long it takes the market to absorb information, out of prudence, a person in possession of Material Nonpublic Information must refrain from any trading activity for one full trading day following such information’s official release. As an example, if a particular fiscal

Page 4 of 10

quarter ends on September 30 and Williams’ earnings are released on Thursday, November 2 at 3:00 p.m. Central Time, trading in Williams Securities may not take place during the period beginning on September 15 and ending at the close of the trading day on Friday, November 3.

In addition to the standard end-of-quarter blackout periods, Williams may, from time to time, impose other blackout periods upon notice to those persons who are affected.

NOTE: IF YOU ARE IN POSSESSION OF MATERIAL NONPUBLIC INFORMATION OR IF YOU HAVE RECEIVED NOTIFICATION FROM WILLIAMS THAT YOU ARE IN POSSESSION OF MATERIAL NONPUBLIC INFORMATION, YOU CANNOT TRADE IN WILLIAMS SECURITIES OR SECURITIES OF ANY OTHER AFFECTED COMPANY UNTIL SUCH INFORMATION IS EITHER PUBLICY DISCLOSED OR IS NO LONGER CONSIDERED MATERIAL.

Pre-Clearance

Directors, Executive Officers, and other Restricted Employees are obligated to pre-clear with the Williams Securities Trading Committee all transactions in Williams Securities, including gifts of Williams Securities. Restricted Employees who are not Directors or Executive Officers but who are subject to the pre-clearance process will be notified that they are required to pre-clear Williams Securities transactions.

A request for pre-clearance to either trade in or make a gift of Williams Securities should be emailed to the Corporate Secretary (at CorporateSecretary@Williams.com) in advance of the proposed transaction. The Corporate Secretary will contact the Williams Securities Trading Committee to seek pre-clearance approval. When a request for pre-clearance is made, the requestor should:

(i)state the type of transaction in which he/she wishes to engage (i.e., buy, sell, gift shares, etc.);

(ii)state a maximum number of securities he/she wishes to trade (i.e., up to 1,000 shares of common stock); and

(iii)state that he/she is not in possession of any Material Nonpublic Information about Williams.

If a proposed transaction receives pre-clearance, the pre-cleared trade (including any standing or limit orders) or gift must be effected within five (5) business days of receipt of pre-clearance unless an exception is granted or the person becomes aware of Material Nonpublic Information, in which case the pre-clearance is void and the trade or gift must not be completed. Transactions not effected within the time limit would be subject to pre-clearance again. If a person seeks pre-clearance and permission to engage in a transaction is denied, then he or she should refrain from initiating any transaction in Williams Securities, and should not inform any other person of the restriction. Note that standing limit orders are subject to the five (5) business day window.

Page 5 of 10

Pre-Arranged Trading Plans

Persons subject to this policy are permitted to conduct transactions pursuant to a written, pre-arranged trading plan that complies with the requirements of Rule 10b5-1(c) of the Securities Exchange Act of 1934, as amended (such trading plan is referred to as a “10b5-1 Plan”). Proper establishment of a 10b5-1 Plan provides an affirmative defense to insider trading liability. Establishment of a 10b5-1 Plan also offers flexibility enabling a person who would like to plan securities transactions in advance, when they are not aware of Material Nonpublic Information, and those pre-planned transactions will be executed under the 10b5-1 Plan at a later time even if such person subsequently becomes aware of Material Nonpublic Information. Any person interested in adopting a 10b5-1 Plan should contact the Corporate Secretary to discuss such plan. Transactions executed in accordance with an adopted 10b5-1 Plan that complies with this policy will be deemed made in accordance with the requirements of this policy.

Williams’ process requirements and additional information related to 10b5-1 Plans is as follows:

Preparation of a 10b5-1 Plan. In consultation with the person requesting a 10b5-1 Plan, such plan is prepared by the proposed trading broker (e.g., Fidelity). Williams does not prepare 10b5-1 Plans for any individual. Once the 10b5-1 Plan is prepared, it must be submitted by the broker to the parties for electronic execution.

Adoption of a 10b5-1 Plan. Williams considers a 10b5-1 Plan to be adopted when a 10b5-1 Plan is executed by each of (i) the person seeking to rely on the plan, (ii) the trading broker and (iii) the Corporate Secretary or his or her designee. Williams requires that all 10b5-1 Plans, including any modifications to any such plan, be reviewed and, as evidenced by execution, pre-approved by the Corporate Secretary or his or her designee.

Timing of Adoption. Subject to not being aware of Material Nonpublic Information:

•Directors, Executive Officers, and other Restricted Employees may adopt a 10b5-1 Plan during an open trading window (i.e. not during a blackout period as discussed above).

•Other persons may adopt a 10b5-1 Plan at any time.

Representations and Certifications Made to Williams. Any representation or certification contained in a 10b5-1 Plan and given to the executing broker, including those listed in the table below, will also be deemed to be given to Williams. Williams intends to and will rely on such representation or certification, regardless of whether the language in a representation or certification included in a 10b5-1 Plans mentions Williams.

Cooling-off Periods. All 10b5-1 Plans must account for the applicable SEC “cooling-off” period. A cooling-off period is a period of time that must elapse prior to the first trade under a 10b5-1 Plan. A cooling off period begins either (i) at the time a 10b5-1 Plan is adopted or (ii) if a 10b5-1 Plan is already in existence, at the time of any modification, regardless of materiality, of the amount, price, or timing (or, if applicable, the written formula or algorithm) in the existing

Page 6 of 10

plan (any such modification, a “Covered Modification”). As stated in the table below, the duration of the applicable cooling-off period depends on the status of the person adopting the 10b5-1 Plan.

The following table sets out additional, applicable 10b5-1 Plan requirements to rely on the affirmative defense.


	Directors and Executive Officers	Other Persons (Including Other Restricted Employees but Excluding Williams)	Williams
General Condition: Not Aware of Material Nonpublic Information	All persons adopting a 10b5-1 Plan must not be aware of Material Nonpublic Information at the time such plan is adopted.
General Good Faith Condition	All persons adopting a 10b5-1 Plan must act in good faith with respect to that plan. This must be true as of the time of adoption of the plan and is also required throughout the duration of the plan.
Cooling-off Period	The later of: (i) 90 days following the adoption or Covered Modification of a 10b5-1 Plan; or (ii) two business days following the disclosure of the Williams’ financial results in either Williams’ Form 10-Q or 10-K for the fiscal quarter in which the plan was adopted (But not to exceed 120 days following plan adoption or modification).	30 days following adoption of a new 10b5-1 Plan or a Covered Modification of an existing 10b5-1 Plan.	None. However, if the SEC subsequently makes issuers subject to a cooling-off period, any 10b5-1 Plan adopted by Williams will be adhere to such cooling-off period.

Page 7 of 10


Certification In the 10b5-1 Plan Document	There must be a representation in the 10b5-1 Plan by the person adopting the plan certifying that on the date of such plan’s adoption: (i)such person is not aware of Material Nonpublic Information about the Williams or Williams Securities; and (ii)such person is adopting the 10b5-1 Plan in good faith and not as part of a plan or scheme to evade the prohibitions of Rule 10b-5.	N/A	N/A
No Overlapping 10b5-1 Plans	Subject to the limited exceptions provided in Rule 10b5-1, a person may not have multiple, overlapping 10b5-1 Plans for purchases or sales on the open market of any class of Williams Securities.		N/A
No More Than One Single-Trade 10b5-1 Plan in a 12 Month Period	A 10b5-1 Plan designed to effect the open-market purchase or sale of the total amount of securities as a single transaction (or a Plan that has the practical effect of requiring such result) may only be adopted if: (i)another single-trade plan was not adopted within the prior 12 months, and (ii)that prior single-trade plan was eligible for the affirmative defense.		N/A

Williams is required to disclose whether any Director or Executive Officer has adopted, terminated or modified a 10b5-1 Plan in its periodic report for the quarter in which such event occurs, along with the material terms of such plan, other than the price.

Additional Obligations for Directors and Executive Officers

Directors and Executive Officers must also comply with the reporting obligations under Section 16 and are prohibited from engaging in “short-swing” transactions covered by that rule. A practical effect of these provisions is that Directors and Executive Officers who purchase and sell, or sell and purchase, certain Williams Securities within a six-month period must disgorge all profits to Williams, whether or not they had knowledge of any Material Nonpublic Information.

Page 8 of 10

Buying stock while Company is repurchasing shares: Until (a) the earlier of such time as the Board or any committee thereof, including the Special Share Repurchase Committee, has no advance knowledge of the share price(s) at which the Company is willing to repurchase shares of its common stock, or (b) the expiration of the $1.5 billion share repurchase program publicly announced by the Company on September 8, 2021, Directors shall not purchase shares of Company common stock on the days in which the Company is also repurchasing shares of common stock.

Section 16 officers of the Company who have direct involvement in managing the Company’s stock repurchase program and/or have advance knowledge of the share price(s) at which the Company is willing to repurchase shares of its common stock shall not purchase shares of Company common stock on the days in which the Company is also repurchasing shares of common stock, except for purchases pursuant to the Company’s employee stock purchase plan or the valid exercise of an existing stock option grant.

Under all circumstances, Directors and Section 16 officers shall not purchase or sell shares of Company common stock within four business days before or after the announcement of a new share repurchase program or the announcement of an increase in size of an existing share repurchase program.

Post-Termination Transactions

Components of this policy may continue to apply to your transactions in Williams Securities even after you have terminated employment. If you are in possession of Material Nonpublic Information when your employment terminates, you may not trade in Williams Securities until that information has become public or is no longer material. In addition, a Director or an Executive Officer can have Section 16 reporting obligations for up to six months after his or her termination. Please consult with the Corporate Secretary for any questions concerning post-termination restrictions and reporting obligations.

Personal Responsibility; No Safe Harbor

You should remember that the ultimate responsibility for adhering to this policy and avoiding improper trading rests with you. You are also responsible for ensuring that every person who lives in your household complies with this policy. If you violate this policy, Williams may take disciplinary action, including dismissal for cause. For those persons who are subject to blackout periods, the existence of such blackouts shall not be considered a safe harbor for trading during other periods.

Gifts of Securities; Miscellaneous

If you wish to make a gift of Williams Securities, special rules may apply. In particular, Directors and Executive Officers should be aware that gifts of Williams Securities trigger a Section 16 Form 4 beneficial ownership disclosure which must be filed with the SEC no later than two business days following the gift. Please contact the Corporate Secretary regarding the applicability of this policy to a proposed gift of Williams Securities.

Page 9 of 10

This policy supersedes and replaces all previous policies prohibiting insider trading. Persons subject to this policy may be required to certify their understanding of this policy and their intent to comply with it. Williams reserves the right to interpret, modify or revise this policy, in whole or in part, without notice.

Adopted by The Williams Companies, Inc. Board of Directors effective: July 25, 2023.

Page 10 of 10

Exhibit 21


ENTITY						JURISDICTION

Arcadia Gas Storage, LLC						Texas
Appalachia Midstream Services, L.L.C.						Oklahoma
Aurora Hydrogen Inc.						Alberta
BPEH-CXL Holdings LLC						Delaware
Bargath LLC						Delaware
Baton Rouge Fractionators LLC						Delaware
Baton Rouge Pipeline LLC						Delaware
Black Marlin Pipeline LLC						Texas
Blue Racer Finance Corp.						Delaware
Blue Racer Midstream, LLC						Delaware
Blue Racer Midstream Holdings, LLC						Delaware
Blue Racer NGL Pipelines, LLC						Delaware
Blue Racer Ohio Compression, LLC						Delaware
Bluestem Gas Services, L.L.C.						Oklahoma
Bluestem Pipeline LLC						Delaware
Branch Midstream Company, LLC						Texas
Brazos Permian II, LLC						Delaware
Cadeville Gas Storage LLC						Delaware
Carbon County UCG, Inc.						Delaware
Carbonate Trend Pipeline LLC						Delaware
Cardinal Gas Services, L.L.C.						Delaware
Cardinal Operating Company, LLC						Delaware
Cardinal Pipeline Company, LLC						North Carolina
Crowheart Energy, LLC						Delaware
DMP NEW YORK, INC.						New York
Dauphin Island Gathering Partners						Texas
Discovery Gas Transmission LLC						Delaware
Discovery Producer Services LLC						Delaware
EIC Rose Rock Ventures I, LP						Delaware
EIC Deep Carbonization Frontier Fund I LP						Delaware
Edge Solar LLC						Delaware
Emerging Energy Ventures, LLC						Delaware
Encino Environmental Holdings LLC						Delaware
Energy Impact Fund II (FT-D) LP						Delaware
Energy Impact Fund II LP						Delaware
Endeavor Gathering LLC						Delaware
Fossett Columbine, LLC						Delaware
Gemini Arklatex, LLC						Delaware
Gemini Arklatex Services, LLC						Delaware

Exhibit 21


ENTITY						JURISDICTION

Gemini Carthage Pipeline, LLC						Delaware
Gulfstar One LLC						Delaware
Gulfstream Management & Operating Services, L.L.C.						Delaware
Gulfstream Natural Gas System, L.L.C.						Delaware
Hill-Lake Gas Storage, LLC						Texas
Ion Clean Energy, Inc.						Delaware
Ingu Solutions Inc.						New Brunswick
Inland Ports, Inc.						Tennessee
Katy Connector Pipeline, LLC						Delaware
Kiowa Lateral LLC						Delaware
Laurel Mountain Midstream Operating LLC						Delaware
Laurel Mountain Midstream, LLC						Delaware
LongPath Technologies, Inc.						Delaware
Louisiana Energy Gateway LLC						Delaware
Louisiana Midstream Gas Services, L.L.C.						Oklahoma
Magnolia Midstream Gas Services, L.L.C.						Oklahoma
Marsh Resources, LLC						Delaware
Mid-Continent Fractionation and Storage, LLC						Delaware
Mockingbird Midstream Gas Services, L.L.C.						Oklahoma
Monarch Pipeline LLC						Delaware
MountainWest Energy Holding Company, LLC						Utah
MountainWest Energy Services, LLC						Utah
MountainWest Field Services, LLC						Utah
MountainWest Overthrust Pipeline, LLC						Utah
MountainWest Pipeline Services, LLC						Utah
MountainWest Pipeline, LLC						Utah
MountainWest Pipelines Holding LLC						Delaware
MountainWest Southern Trails Pipeline Company						Utah
MountainWest White River Hub, LLC						Utah
NT Minerals, LLC						Texas
New Energy Ventures Holdco, LLC						Delaware
NorTex Development Company, LLC						Delaware
NorTex Midstream Holdings, LLC						Delaware
NorTex Midstream Partners, LLC						Delaware
NorTex Trading and Marketing, LLC						Texas
Northwest Pipeline LLC						Delaware
Ohio Valley Midstream LLC						Delaware
Oklahoma Midstream Gas Services, L.L.C.						Oklahoma
Orbital Sidekick, Inc.						Delaware

Exhibit 21


ENTITY						JURISDICTION

Overland Pass Pipeline Company LLC						Delaware
Pacific Connector Gas Pipeline, LP						Delaware
Parachute Pipeline LLC						Delaware
Permian Connector, LLC						Delaware
Perryville Gas Storage LLC						Delaware
Pine Needle LNG Company, LLC						North Carolina
Pine Needle Operating Company, LLC						Delaware
Pine Prairie Energy Center, LLC						Delaware
Ponder Midstream Gas Services, L.L.C.						Delaware
Power Eight Project LLC						Delaware
Reserveco Inc.						Delaware
Rocky Mountain Midstream Holdings LLC						Delaware
Rocky Mountain Midstream JV Holdings LLC						Delaware
Rocky Mountain Midstream LLC						Texas
Rocky Mountain Midstream Marketing LLC						Texas
Rocky Mountain Midstream Pipeline LLC						Texas
SG Resources Mississippi, L.L.C.						Delaware
Sequent Energy Canada LLC						Delaware
Sequent Energy Management LLC						Delaware
Socagee Midstream Gas Services LLC						Delaware
South Mansfield E&P, LLC						Delaware
TWC Holdings C.V.						Netherlands
Targa Train 7 LLC						Delaware
Texas Midstream Gas Services, L.L.C.						Oklahoma
The Williams Companies Foundation, Inc.						Oklahoma
The Williams Companies International Holdings B.V.						Dutch BV
TransCardinal Company, LLC						Delaware
TransCarolina LNG Company, LLC						Delaware
Transco Exploration Company						Delaware
Transcontinental Gas Pipe Line Company, LLC						Delaware
UEOM NGL Pipelines LLC						Delaware
Utica East Ohio Midstream LLC						Delaware
Utica Gas Services, L.L.C.						Oklahoma
WFS - Liquids LLC						Delaware
WFS Dauphin Island, LLC						Delaware
WFS Gathering Company, L.L.C.						Delaware
WFS Mobile Bay Processing, LLC						Delaware
WFS Natural Gas Storage, LLC						Delaware
Wamsutter LLC						Delaware

Exhibit 21


ENTITY						JURISDICTION

Wamsutter E&P, LLC						Delaware
White River Hub, LLC						Delaware
WilPro Energy Services (El Furrial) Limited						Cayman Islands
WilPro Energy Services (Pigap II) Limited						Cayman Islands
Williams Acquisition Holding Company LLC						New Jersey
Williams Alaska Petroleum, Inc.						Alaska
Williams Blu Operating LLC						Delaware
Williams CRE LLC						Delaware
Williams CV Holdings LLC						Delaware
Williams Cardinal Gas, LLC						Delaware
Williams Compression LLC						Oklahoma
Williams Express LLC						Delaware
Williams Express, Inc.						Alaska
Williams Field Services - Gulf Coast Company LLC						Delaware
Williams Field Services Company, LLC						Delaware
Williams Field Services Group, LLC						Delaware
Williams Flexible Generation, LLC						Delaware
Williams Front Range LLC						Delaware
Williams Gas Processing - Gulf Coast Company LLC						Delaware
Williams Gilcrest, LLC						Delaware
Williams Global Energy (Cayman) Limited						Cayman Islands
Williams Global Holdings LLC						Delaware
Williams Headquarters Building LLC						Delaware
Williams Holdings and Manufacturing LLC						Delaware
Williams Hutch Rail Company, LLC						Delaware
Williams IP Holdings, LLC						Delaware
Williams Information Technology LLC						Delaware
Williams International Company LLC						Delaware
Williams International El Furrial Limited						Cayman Islands
Williams International Pigap Limited						Cayman Islands
Williams International Venezuela Limited						Cayman Islands
Williams LNG, LLC						Delaware
Williams Laurel Mountain, LLC						Delaware
Williams MLP Operating, LLC						Delaware
Williams Midstream Gas Services LLC						Oklahoma
Williams Mobile Bay Producer Services, L.L.C.						Delaware
Williams Natural Gas Storage, LLC						Delaware
Williams Ohio River Valley Corporation						Delaware
Williams Ohio River Valley LLC						Delaware

Exhibit 21


ENTITY						JURISDICTION

Williams Ohio Valley Midstream LLC						Texas
Williams Ohio Valley Pipeline LLC						Delaware
Williams Oil Gathering, L.L.C.						Delaware
Williams PERK, LLC						Delaware
Williams Partners Operating LLC						Delaware
Williams Petroleum Services, LLC						Delaware
Williams Pipeline Services LLC						Delaware
Williams Propylene Company LLC						Delaware
Williams Resource Center, L.L.C.						Delaware
Williams Rocky Mountain Midstream Operating LLC						Delaware
Williams Solar Holdco LLC						Delaware
Williams Strategic Sourcing Company LLC						Delaware
Williams Upstream Holdings, LLC						Delaware
Williams WPC - I, LLC						Delaware
Worsham-Steed Gas Storage, LLC						Texas

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

(1)Registration Statements (Form S-3 Nos. 333-29185 and 333-277232) of The Williams Companies, Inc.,

(2) Registration Statement (Form S-8 No. 333-03957) pertaining to The Williams Companies, Inc. 1996 Stock Plan for Non-Employee Directors,

(3) Registration Statement (Form S-8 No. 333-85542) pertaining to The Williams Investment Plus Plan,

(4) Registration Statement (Form S-8 No. 333-85546) pertaining to The Williams Companies, Inc. 2002 Incentive Plan,

(5) Registration Statement (Form S-8 No. 333-142985) pertaining to The Williams Companies, Inc. 2007 Employee Stock Purchase Plan and The Williams Companies, Inc. 2007 Incentive Plan,

(6) Registration Statement (Form S-8 No. 333-167123) pertaining to The Williams Companies, Inc. 2007 Incentive Plan, and

(7) Registration Statement (Form S-8 No. 333-198050) pertaining to The Williams Companies, Inc. 2007 Incentive Plan and The Williams Companies, Inc. 2007 Employee Stock Purchase Plan;

of our reports dated February 25, 2025, with respect to the consolidated financial statements and the effectiveness of internal control over financial reporting of The Williams Companies, Inc., incorporated by reference in this Annual Report (Form 10-K) for the year ended December 31, 2024 and the financial statement schedule of The Williams Companies, Inc. included herein.

/s/ Ernst & Young LLP

Tulsa, Oklahoma
February 25, 2025

Exhibit 31.1

CERTIFICATIONS

I, Alan S. Armstrong, certify that:

1. I have reviewed this annual report on Form 10-K of The Williams Companies, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 25, 2025


			/s/ Alan S. Armstrong
			Alan S. Armstrong
			President and Chief Executive Officer
			(Principal Executive Officer)

Exhibit 31.2

CERTIFICATIONS

I, John D. Porter, certify that:

1. I have reviewed this annual report on Form 10-K of The Williams Companies, Inc.;

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 25, 2025


			/s/ John D. Porter
			John D. Porter
			Senior Vice President and Chief Financial Officer
			(Principal Financial Officer)

Exhibit 31.3

SECTION 302 CERTIFICATION

I, Chad A. Teply, certify that:

1.I have reviewed this annual report on Form 10-K of Transcontinental Gas Pipe Line Company, LLC;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 25, 2025


By:			/s/ Chad A. Teply
			Chad A. Teply
			Senior Vice President
			(Principal Executive Officer)

Exhibit 31.4

SECTION 302 CERTIFICATION

I, Mary A. Hausman, certify that:

1.I have reviewed this annual report on Form 10-K of Transcontinental Gas Pipe Line Company, LLC;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 25, 2025


By:			/s/ Mary A. Hausman
			Mary A. Hausman
			Vice President and Chief Accounting Officer
			(Principal Financial Officer)

Exhibit 31.5

SECTION 302 CERTIFICATION

I, Chad A. Teply, certify that:

1.I have reviewed this annual report on Form 10-K of Northwest Pipeline LLC;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 25, 2025


By:			/s/ Chad A. Teply
			Chad A. Teply
			Senior Vice President
			(Principal Executive Officer)

Exhibit 31.6

SECTION 302 CERTIFICATION

I, Mary A. Hausman, certify that:

1.I have reviewed this annual report on Form 10-K of Northwest Pipeline LLC;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: February 25, 2025


By:			/s/ Mary A. Hausman
			Mary A. Hausman
			Vice President and Chief Accounting Officer
			(Principal Financial Officer)

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of The Williams Companies, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned hereby certifies, in his capacity as an officer of the Company, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


/s/ Alan S. Armstrong
Alan S. Armstrong
President and Chief Executive Officer
February 25, 2025

/s/ John D. Porter
John D. Porter
Senior Vice President and Chief Financial Officer
February 25, 2025

A signed original of this written statement required by Section 906 has been provided to, and will be retained by, the Company and furnished to the Securities and Exchange Commission or its staff upon request.

The foregoing certification is being furnished to the Securities and Exchange Commission as an exhibit to the Report and shall not be considered filed as part of the Report.

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Transcontinental Gas Pipe Line Company, LLC (the “Company”) on Form 10-K for the period ending December 31, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned hereby certifies, in his capacity as an officer of the Company, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


/s/ Chad A. Teply

Chad A. Teply
Senior Vice President
February 25, 2025


/s/ Mary A. Hausman

Mary A. Hausman
Vice President and Chief Accounting Officer
February 25, 2025

The foregoing certification is being furnished to the Securities and Exchange Commission as an exhibit to the Report and shall not be considered filed as part of the Report.

Exhibit 32.3

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Northwest Pipeline LLC (the “Company”) on Form 10-K for the period ending December 31, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned hereby certifies, in his capacity as an officer of the Company, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


/s/ Chad A. Teply
Chad A. Teply
Senior Vice President
February 25, 2025


/s/ Mary A. Hausman
Mary A. Hausman
Vice President and Chief Accounting Officer
February 25, 2025

The foregoing certification is being furnished to the Securities and Exchange Commission as an exhibit to the Report and shall not be considered filed as part of the Report.

v3.25.0.1

Audit Information
12 Months Ended

Dec. 31, 2024

Auditor [Line Items]

Auditor Name Ernst & Young LLP

Auditor Location Tulsa, Oklahoma

Auditor Firm ID 42

Transcontinental Gas Pipe Line Company, LLC [Member]

Auditor [Line Items]

Auditor Name Ernst & Young LLP

Auditor Location Houston, Texas

Auditor Firm ID 42

Northwest Pipeline LLC [Member]

Auditor [Line Items]

Auditor Name Ernst & Young LLP

Auditor Location Houston, Texas

Auditor Firm ID 42

v3.25.0.1

Document and Entity Information - USD ($)
12 Months Ended

Dec. 31, 2024

Feb. 20, 2025

Jun. 30, 2024

Document Information [Line Items]

Document Type 10-K

Document Annual Report true

Document Period End Date Dec. 31, 2024

Document Transition Report false

Entity Registrant Name Williams Companies, Inc.

Entity File Number 1-4174

Entity Incorporation, State or Country Code DE

Entity Tax Identification Number 73-0569878

Entity Address, Address Line One One Williams Center

Entity Address, City or Town Tulsa

Entity Address, State or Province OK

Entity Address, Postal Zip Code 74172

City Area Code 800

Local Phone Number 945-5426

Title of 12(b) Security Common Stock, $1.00 par value

Trading Symbol WMB

Security Exchange Name NYSE

Entity Well-known Seasoned Issuer Yes

Entity Voluntary Filers No

Entity Current Reporting Status Yes

Entity Interactive Data Current Yes

Entity Filer Category Large Accelerated Filer

Entity Small Business false

Entity Emerging Growth Company false

ICFR Auditor Attestation Flag true

DocumentFinStmtErrorCorrectionFlag true

Document Financial Statement Restatement Recovery Analysis [Flag] false

Entity Shell Company false

Entity Public Float $ 49,974,668,630

Entity Common Stock, Shares Outstanding 1,219,369,295

Documents Incorporated by Reference [Text Block]
Portions of the Williams’ Definitive Proxy Statement for the Williams’ Annual Meeting of Stockholders to be held on April 29, 2025, are incorporated into Part III, as specifically set forth in Part III.

Entity Central Index Key 0000107263

Amendment Flag false

Document Fiscal Year Focus 2024

Document Fiscal Period Focus FY

Current Fiscal Year End Date --12-31

Transcontinental Gas Pipe Line Company, LLC [Member]

Document Information [Line Items]

Document Type 10-K

Document Annual Report true

Document Period End Date Dec. 31, 2024

Document Transition Report false

Entity Registrant Name Transcontinental Gas Pipe Line Company, LLC

Entity File Number 1-7584

Entity Incorporation, State or Country Code DE

Entity Tax Identification Number 74-1079400

Entity Address, Address Line One 2800 Post Oak Boulevard

Entity Address, City or Town Houston

Entity Address, State or Province TX

Entity Address, Postal Zip Code 77056

City Area Code 713

Local Phone Number 215-2000

Entity Well-known Seasoned Issuer No

Entity Voluntary Filers No

Entity Current Reporting Status Yes

Entity Interactive Data Current Yes

Entity Filer Category Non-accelerated Filer

Entity Small Business false

Entity Emerging Growth Company false

ICFR Auditor Attestation Flag false

DocumentFinStmtErrorCorrectionFlag false

Entity Shell Company false

Entity Public Float 0

Entity Common Stock, Shares Outstanding 0

Entity Central Index Key 0000099250

Amendment Flag false

Document Fiscal Year Focus 2024

Document Fiscal Period Focus FY

Current Fiscal Year End Date --12-31

Northwest Pipeline LLC [Member]

Document Information [Line Items]

Document Type 10-K

Document Annual Report true

Document Period End Date Dec. 31, 2024

Document Transition Report false

Entity Registrant Name Northwest Pipeline LLC

Entity File Number 1-7414

Entity Incorporation, State or Country Code DE

Entity Tax Identification Number 26-1157701

Entity Address, Address Line One One Williams Center

Entity Address, City or Town Tulsa

Entity Address, State or Province OK

Entity Address, Postal Zip Code 74172

City Area Code 800

Local Phone Number 945-5426

Entity Well-known Seasoned Issuer No

Entity Voluntary Filers No

Entity Current Reporting Status Yes

Entity Interactive Data Current Yes

Entity Filer Category Non-accelerated Filer

Entity Small Business false

Entity Emerging Growth Company false

ICFR Auditor Attestation Flag false

DocumentFinStmtErrorCorrectionFlag false

Entity Shell Company false

Entity Public Float $ 0

Entity Common Stock, Shares Outstanding 0

Entity Central Index Key 0000110019

Amendment Flag false

Document Fiscal Year Focus 2024

Document Fiscal Period Focus FY

Current Fiscal Year End Date --12-31

v3.25.0.1

Consolidated Statement of Income - Williams - USD ($)
shares in Thousands, $ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Revenues:

Revenues $ 10,503 $ 10,907 $ 10,965

Costs and expenses:

Operating and maintenance expenses 2,179 1,984 1,817

Depreciation and amortization expenses 2,219 2,071 2,009

Selling, general, and administrative expenses 708 665 636

Gain on sale of business (Note 3) 0 (129) 0

Other (income) expense – net (60) (30) 28

Total costs and expenses 7,164 6,596 7,947

Operating income (loss) 3,339 4,311 3,018

Equity earnings (losses) 560 589 637

Other investing income (loss) – net 343 108 16

Interest Expense, Nonoperating (1,364) (1,236) (1,147)

Gain (Loss) Related to Litigation Settlement 0 534 0

Other income (expense) – net 108 99 18

Income (loss) before income taxes 2,986 4,405 2,542

Less: Provision (benefit) for income taxes 640 1,005 425

Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest 2,346 3,400 2,117

Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest 0 (97) 0

Net income (loss) 2,346 3,303 2,117

Less: Net income (loss) attributable to noncontrolling interests 121 124 68

Net income (loss) attributable to The Williams Companies, Inc. 2,225 3,179 2,049

Less: Preferred stock dividends 3 3 3

Net income (loss) available to common stockholders 2,222 3,176 2,046

Amounts attributable to The Williams Companies, Inc. available to common stockholders:

Income (loss) from continuing operations 2,222 3,273 2,046

Income (loss) from discontinued operations (Note 1) $ 0 $ (97) $ 0

Basic earnings (loss) per common share:

Income (Loss) from Continuing Operations, Per Basic Share $ 1.82 $ 2.69 $ 1.68

Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share 0 (0.08) 0

Net income (loss) available to common stockholders - Basic $ 1.82 $ 2.61 $ 1.68

Weighted Average Number of Shares Outstanding, Basic 1,219,184 1,217,784 1,218,362

Diluted earnings (loss) per common share:

Income (Loss) from Continuing Operations, Per Diluted Share $ 1.82 $ 2.68 $ 1.67

Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share 0 (0.08) 0

Net income (loss) available to common stockholders - Diluted $ 1.82 $ 2.60 $ 1.67

Weighted Average Number of Shares Outstanding, Diluted 1,222,954 1,222,715 1,222,672

Service [Member]

Revenues:

Revenues $ 7,628 $ 7,026 $ 6,536

NonRegulated Service Commodity Consideration [Member]

Revenues:

Revenues 134 146 260

Product [Member]

Revenues:

Revenues 2,991 2,779 4,556

Energy Commodities and Service

Revenues:

Revenues (250) 956 (387)

Oil and Gas, Purchased [Member]

Costs and expenses:

Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization 2,075 1,884 3,369

Natural Gas Purchased For Shrink [Member]

Costs and expenses:

Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization $ 43 $ 151 $ 88

v3.25.0.1

Consolidated Statement of Comprehensive Income (Loss) - Williams - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Comprehensive income (loss):

Net income (loss) $ 2,346 $ 3,303 $ 2,117

Designated interest rate cash flow hedging activities:

Net unrealized gain (loss) from derivative instruments, net of taxes of $(2), $(8), and $1 in 2024, 2023, and 2022, respectively 6 26 (3)

Reclassifications into earnings of net derivative instruments (gain) loss, net of taxes of $1, $1 and $— in 2024, 2023, and 2022, respectively (2) (2) 0

Pension and other postretirement benefits:

Net actuarial gain (loss) arising during the year, net of taxes of $(24), $—, and $1 in 2024, 2023, and 2022, respectively 72 (2) 1

Amortization of actuarial (gain) loss and net actuarial loss from settlements included in net periodic benefit cost (credit), net of taxes of $1, $—, and $(4) in 2024, 2023, and 2022, respectively 0 3 11

Other comprehensive income (loss) 76 25 9

Comprehensive income (loss) 2,422 3,328 2,126

Less: Comprehensive income (loss) attributable to noncontrolling interests 121 124 68

Comprehensive income (loss) attributable to The Williams Companies, Inc. $ 2,301 $ 3,204 $ 2,058

v3.25.0.1

Consolidated Statement of Comprehensive Income (Loss) (Parenthetical) - Williams - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Cash flow hedging activities:

Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax $ (2) $ (8) $ 1

Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax 1 1 0

Pension and other postretirement benefits:

Other Comprehensive Income (Loss), Defined Benefit Plan, Net Actuarial Gain (Loss) Arising During Period, Tax (24) 0 1

Other Comprehensive Income Loss, Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Included In Net Periodic Benefit Cost (Credit), Tax $ 1 $ 0 $ (4)

v3.25.0.1

Consolidated Balance Sheet - Williams - USD ($)
$ in Millions

Dec. 31, 2024

Dec. 31, 2023

Current assets:

Cash and cash equivalents $ 60 $ 2,150

Receivables, Net, Current 1,863 1,655

Inventories 279 274

Derivative assets 267 239

Other current assets and deferred charges 192 195

Total current assets 2,661 4,513

Investments 4,140 4,637

Property, Plant and Equipment, Net 38,692 34,311

Intangible assets – net of accumulated amortization 7,209 7,593

Regulatory assets, deferred charges, and other 1,830 1,573

Total assets 54,532 52,627

Current liabilities:

Accounts payable 1,613 1,379

Derivative Liability, Current 164 105

Other current liabilities 1,360 1,284

Commercial paper 455 725

Long-term debt due within one year 1,720 2,337

Total current liabilities 5,312 5,830

Long-term debt 24,736 23,376

Deferred income tax liabilities 4,376 3,846

Regulatory liabilities, deferred income, and other 5,268 4,684

Contingent liabilities and commitments (Note 18)

Stockholders’ equity:

Preferred stock ($1 par value; 30 million shares authorized at December 31, 2024 and December 31, 2023; 35 thousand shares issued at December 31, 2024 and December 31, 2023) 35 35

Common stock ($1 par value; 1,470 million shares authorized at December 31, 2024 and December 31, 2023; 1,258 million shares issued at December 31, 2024 and 1,256 million shares issued at December 31, 2023) 1,258 1,256

Capital in excess of par value 24,643 24,578

Retained deficit (12,396) (12,287)

Accumulated other comprehensive income (loss) 76 0

Treasury stock, at cost (39 million shares at December 31, 2024 and December 31, 2023 of common stock) (1,180) (1,180)

Total stockholders’ equity 12,436 12,402

Noncontrolling interests in consolidated subsidiaries 2,404 2,489

Total equity 14,840 14,891

Total liabilities and equity $ 54,532 $ 52,627

v3.25.0.1

Consolidated Balance Sheet (Parenthetical) - Williams - USD ($)
shares in Thousands, $ in Millions

Dec. 31, 2024

Dec. 31, 2023

Accounts Receivable, Allowance for Credit Loss, Current $ 1 $ 3

Common Stock, Par or Stated Value Per Share $ 1 $ 1

Common Stock, Shares Authorized 1,470,000 1,470,000

Common Stock, Shares, Issued 1,258,000 1,256,000

Treasury Stock, Common, Shares 39,000 39,000

Series B Preferred Stock [Member]

Preferred Stock, Par or Stated Value Per Share $ 1 $ 1

Preferred Stock, Shares Authorized 30,000 30,000

Preferred Stock, Shares Issued 35 35

v3.25.0.1

Consolidated Statement of Changes in Equity - Williams - USD ($)
$ in Millions

Total

Preferred Stock

Common Stock

Capital in Excess of Par Value

Retained Deficit

Accumulated Other Comprehensive Income (Loss)

Treasury Stock

Total Stockholders' Equity

Noncontrolling Interests

Beginning balance at Dec. 31, 2021 $ 14,101 $ 35 $ 1,250 $ 24,449 $ (13,237) $ (33) $ (1,041) $ 11,423 $ 2,678

Net income (loss) 2,117 0 0 0 2,049 0 0 2,049 68

Other comprehensive income (loss) 9 0 0 0 0 9 0 9 0

Dividends, Common Stock, Cash (2,071) 0 0 0 (2,071) 0 0 (2,071) 0

Stock-based compensation and related common stock issuances, net of tax 96 0 3 93 0 0 0 96 0

Dividends and distributions to noncontrolling interests (204) 0 0 0 0 0 0 0 (204)

Contributions from noncontrolling interests 18 0 0 0 0 0 0 0 18

Purchases of treasury stock (9) 0 0 0 0 0 (9) (9) 0

Other (12) 0 0 0 (12) 0 0 (12) 0

Net increase (decrease) in equity (56) 0 3 93 (34) 9 (9) 62 (118)

Ending balance at Dec. 31, 2022 14,045 35 1,253 24,542 (13,271) (24) (1,050) 11,485 2,560

Net income (loss) 3,303 0 0 0 3,179 0 0 3,179 124

Other comprehensive income (loss) 25 0 0 0 0 25 0 25 0

Dividends, Common Stock, Cash (2,179) 0 0 0 (2,179) 0 0 (2,179) 0

Stock-based compensation and related common stock issuances, net of tax 38 0 3 35 0 0 0 38 0

Dividends and distributions to noncontrolling interests (213) 0 0 0 0 0 0 0 (213)

Contributions from noncontrolling interests 18 0 0 0 0 0 0 0 18

Purchases of treasury stock (130) 0 0 0 0 0 (130) (130) 0

Other (16) 0 0 1 (16) (1) 0 (16) 0

Net increase (decrease) in equity 846 0 3 36 984 24 (130) 917 (71)

Ending balance at Dec. 31, 2023 14,891 35 1,256 24,578 (12,287) 0 (1,180) 12,402 2,489

Net income (loss) 2,346 0 0 0 2,225 0 0 2,225 121

Other comprehensive income (loss) 76 0 0 0 0 76 0 76 0

Dividends, Common Stock, Cash (2,316) 0 0 0 (2,316) 0 0 (2,316) 0

Stock-based compensation and related common stock issuances, net of tax 67 0 2 65 0 0 0 67 0

Dividends and distributions to noncontrolling interests (242) 0 0 0 0 0 0 0 (242)

Contributions from noncontrolling interests 36 0 0 0 0 0 0 0 36

Purchases of treasury stock 0

Other (18) 0 0 0 (18) 0 0 (18) 0

Net increase (decrease) in equity (51) 0 2 65 (109) 76 0 34 (85)

Ending balance at Dec. 31, 2024 $ 14,840 $ 35 $ 1,258 $ 24,643 $ (12,396) $ 76 $ (1,180) $ 12,436 $ 2,404

v3.25.0.1

Consolidated Statement of Changes in Equity (Parenthetical) - Williams - $ / shares
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Statement of Stockholders' Equity [Abstract]

Common Stock, Dividends, Per Share, Declared $ 1.90 $ 1.79 $ 1.70

v3.25.0.1

Consolidated Statement of Cash Flows - Williams - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

OPERATING ACTIVITIES:

Net income (loss) $ 2,346 $ 3,303 $ 2,117

Adjustments to reconcile to net cash provided (used) by operating activities:

Depreciation and amortization 2,219 2,071 2,009

Provision (benefit) for deferred income taxes 506 951 431

Equity (earnings) losses (560) (589) (637)

Distributions from equity-method investees (Note 8) 789 796 865

Net unrealized (gain) loss from commodity derivative instruments 367 (660) 249

Gain on sale of business (Note 3) 0 (129) 0

Gain on disposition of equity-method investments (Note 8) (149) 0 0

Gain on remeasurement of equity-method investments (Note 3) (127) (30) 0

Inventory write-downs 10 30 161

Amortization of stock-based awards 99 77 73

Cash provided (used) by changes in current assets and liabilities:

Accounts receivable (169) 1,089 (733)

Inventories (9) 13 (110)

Other current assets and deferred charges 9 60 (33)

Accounts payable 139 (1,009) 410

Other current liabilities 35 (19) 209

Changes in current and noncurrent commodity derivative assets and liabilities (286) 200 94

Other, including changes in noncurrent assets and liabilities (245) (216) (216)

Net cash provided (used) by operating activities 4,974 5,938 4,889

FINANCING ACTIVITIES:

Proceeds from (payments of) commercial paper – net (269) 372 345

Proceeds from long-term debt 3,594 2,755 1,755

Payments of long-term debt (2,946) (634) (2,876)

Payments for debt issuance costs (32) (23) (17)

Proceeds from issuance of common stock 10 6 54

Purchases of treasury stock 0 (130) (9)

Common dividends paid (2,316) (2,179) (2,071)

Dividends and distributions paid to noncontrolling interests (242) (213) (204)

Contributions from noncontrolling interests 36 18 18

Other – net (36) (21) (37)

Net cash provided (used) by financing activities (2,201) (49) (3,042)

INVESTING ACTIVITIES:

Capital expenditures (1) (2,573) (2,516) (2,253)

Dispositions – net (105) (51) (30)

Proceeds from sale of business (Note 3) 0 346 0

Purchases of businesses, net of cash acquired (Note 3) (2,244) (1,568) (933)

Proceeds from dispositions of equity-method investments (Note 8) 161 0 0

Purchases of and contributions to equity-method investments (Note 8) (114) (141) (166)

Other – net 12 39 7

Net cash provided (used) by investing activities (4,863) (3,891) (3,375)

Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total (2,090) 1,998 (1,528)

Cash and cash equivalents at beginning of year 2,150 152 1,680

Cash and cash equivalents at end of year 60 2,150 152

Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]

(1) Increases to property, plant, and equipment (2,581) (2,564) (2,394)

Changes in related accounts payable and accrued liabilities 8 48 141

Capital expenditures $ (2,573) $ (2,516) $ (2,253)

v3.25.0.1

Statement of Net Income - Transco - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Revenues [Abstract]

Revenues $ 10,503 $ 10,907 $ 10,965

Costs and Expenses [Abstract]

Depreciation and amortization 2,219 2,071 2,009

Other Operating Income (Expense), Net (60) (30) 28

Total costs and expenses 7,164 6,596 7,947

Operating income (loss) 3,339 4,311 3,018

Interest Expense, Nonoperating (1,364) (1,236) (1,147)

Other Nonoperating Income (Expense) 108 99 18

Net income 2,225 3,179 2,049

Transcontinental Gas Pipe Line Company, LLC [Member]

Revenues [Abstract]

Revenues 2,964 2,866 2,909

Costs and Expenses [Abstract]

Cost of natural gas sales 118 137 179

Utilities Operating Expense, Maintenance and Operations 510 517 531

General and Administrative Expense 216 215 225

Depreciation and amortization 545 519 513

Taxes, Miscellaneous 111 105 98

Other Operating Income (Expense), Net (35) (38) (7)

Total costs and expenses 1,465 1,455 1,539

Operating income (loss) 1,499 1,411 1,370

Interest Expense, Nonoperating (324) (324) (327)

Interest Income, Other 58 87 36

Public Utilities, Allowance for Funds Used During Construction, Additions 88 77 28

Other Nonoperating Income (Expense) (8) (4) (7)

Net income 1,313 1,247 1,100

Natural Gas, US Regulated | Transcontinental Gas Pipe Line Company, LLC [Member]

Revenues [Abstract]

Revenues 2,619 2,506 2,503

Natural Gas, Storage | Transcontinental Gas Pipe Line Company, LLC [Member]

Revenues [Abstract]

Revenues 200 186 193

Natural Gas, Gathering, Transportation, Marketing and Processing | Transcontinental Gas Pipe Line Company, LLC [Member]

Revenues [Abstract]

Revenues 118 137 179

Product and Service, Other | Transcontinental Gas Pipe Line Company, LLC [Member]

Revenues [Abstract]

Revenues $ 27 $ 37 $ 34

v3.25.0.1

Balance Sheet - Transco - USD ($)
$ in Millions

Dec. 31, 2024

Dec. 31, 2023

Assets, Current [Abstract]

Cash and cash equivalents $ 60 $ 2,150

Inventory, Net 279 274

Other current assets and deferred charges 192 195

Current assets 2,661 4,513

Property, Plant and Equipment, Net 38,692 34,311

Other Assets, Noncurrent 1,830 1,573

Total assets 54,532 52,627

Liabilities, Current [Abstract]

Accounts payable 1,613 1,379

Regulatory Liability, Current 85 77

Other current liabilities 1,360 1,284

Asset Retirement Obligation, Current 91 106

Total current liabilities 5,312 5,830

Contingent liabilities and commitments

Members' Equity [Abstract]

Retained Earnings (Accumulated Deficit) (12,396) (12,287)

Total liabilities and equity 54,532 52,627

Transcontinental Gas Pipe Line Company, LLC [Member]

Assets, Current [Abstract]

Cash and cash equivalents 0 0

Accounts and Other Receivables, Net, Current 12 11

Inventory, Net 81 83

Regulatory Assets, Current 74 87

Other current assets and deferred charges 24 14

Current assets 1,103 1,809

Property, Plant and Equipment, Net 14,103 13,330

Regulatory Assets, Noncurrent 320 299

Other Assets, Noncurrent 405 350

Total assets 15,931 15,788

Liabilities, Current [Abstract]

Accounts Payable, Trade, Current 258 278

Regulatory Liability, Current 58 49

Other current liabilities 181 190

Asset Retirement Obligation, Current 22 96

Long-Term Debt, Current Maturities 35 32

Total current liabilities 609 700

Long-Term Debt, Excluding Current Maturities 5,200 5,229

Regulatory Liabilities, Noncurrent 976 956

Asset Retirement Obligations, Noncurrent 593 524

Other Liabilities, Noncurrent 248 242

Contingent liabilities and commitments

Members' Equity [Abstract]

Members' Capital 5,088 5,088

Retained Earnings (Accumulated Deficit) 3,217 3,049

Total Members' Equity 8,305 8,137

Total liabilities and equity 15,931 15,788

Transcontinental Gas Pipe Line Company, LLC [Member] | Related Party

Assets, Current [Abstract]

Accounts and Financing Receivable, after Allowance for Credit Loss, Current 638 1,353

Accounts Receivable, after Allowance for Credit Loss, Current 24 10

Liabilities, Current [Abstract]

Accounts payable 55 55

Transcontinental Gas Pipe Line Company, LLC [Member] | Nonrelated Party

Assets, Current [Abstract]

Accounts Receivable, after Allowance for Credit Loss, Current $ 250 $ 251

v3.25.0.1

Statement of Changes in Member's Equity - Transco - USD ($)
$ in Millions

Total

Transcontinental Gas Pipe Line Company, LLC [Member]

Member's Capital

Transcontinental Gas Pipe Line Company, LLC [Member]

Retained Earnings

Transcontinental Gas Pipe Line Company, LLC [Member]

Balance at beginning of year at Dec. 31, 2021 $ 4,960 $ 2,760

Cash contributions from parent $ (128) 128

Net income $ 2,049 1,100 1,100

Cash distributions to parent 838 (838)

Balance at end of year at Dec. 31, 2022 8,110 5,088 3,022

Cash contributions from parent 0 0

Net income 3,179 1,247 1,247

Cash distributions to parent 1,220 (1,220)

Balance at end of year at Dec. 31, 2023 8,137 5,088 3,049

Cash contributions from parent 0 0

Net income $ 2,225 1,313 1,313

Cash distributions to parent 1,145 (1,145)

Balance at end of year at Dec. 31, 2024 $ 8,305 $ 5,088 $ 3,217

v3.25.0.1

Statement of Cash Flows - Transco - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Net Cash Provided by (Used in) Operating Activities [Abstract]

Net income $ 2,346 $ 3,303 $ 2,117

Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]

Depreciation and amortization 2,219 2,071 2,009

Increase (Decrease) in Operating Capital [Abstract]

Increase (Decrease) in Inventories (9) 13 (110)

Increase (Decrease) in Other Current Assets 9 60 (33)

Other current liabilities 35 (19) 209

Other Operating Activities, Cash Flow Statement (245) (216) (216)

Net cash provided (used) by operating activities 4,974 5,938 4,889

Net Cash Provided by (Used in) Financing Activities [Abstract]

Net cash provided (used) by financing activities (2,201) (49) (3,042)

Net Cash Provided by (Used in) Investing Activities [Abstract]

Capital expenditures (1) (2,573) (2,516) (2,253)

Net cash provided (used) by investing activities (4,863) (3,891) (3,375)

Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total (2,090) 1,998 (1,528)

Cash and cash equivalents at beginning of year 2,150 152 1,680

Cash and cash equivalents at end of year 60 2,150 152

Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]

Property, Plant and Equipment, Additions (2,581) (2,564) (2,394)

Capital expenditures (2,573) (2,516) (2,253)

Transcontinental Gas Pipe Line Company, LLC [Member]

Net Cash Provided by (Used in) Operating Activities [Abstract]

Net income 1,313 1,247 1,100

Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]

Depreciation and amortization 545 519 513

Increase (Decrease) in Allowance for Equity Funds Used During Construction (71) (63) (23)

Increase (Decrease) in Operating Capital [Abstract]

Increase (Decrease) in Accounts Receivable, Related Parties (14) (1) (1)

Increase (Decrease) in Accounts and Other Receivables 0 6 (20)

Increase (Decrease) in Inventories 2 10 (39)

Increase (Decrease) in Other Regulatory Assets 13 37 (10)

Increase (Decrease) in Other Current Assets (10) 27 (17)

Increase (Decrease) in Accounts Payable, Trade (4) (18) 21

Increase (Decrease) in Accounts Payable, Related Parties 0 1 (15)

Other current liabilities (63) 72 (31)

Other Operating Activities, Cash Flow Statement (15) (122) 38

Net cash provided (used) by operating activities 1,696 1,715 1,516

Net Cash Provided by (Used in) Financing Activities [Abstract]

Proceeds from Issuance of Other Long-Term Debt 2 7 9

Repayments of Other Long-Term Debt (32) (29) (26)

Cash distributions to parent (1,145) (1,220) (838)

Cash contributions from parent 0 0 128

Net cash provided (used) by financing activities (1,175) (1,242) (727)

Net Cash Provided by (Used in) Investing Activities [Abstract]

Capital expenditures (1) (1,140) (894) (603)

Contributions in aid of construction 16 21 1

Payments for (Proceeds from) Removal Costs (110) (51) (33)

IncreaseDecreaseInAdvancesToAffiliates 715 460 (143)

Payments to Acquire Investments to be Held in Decommissioning Trust Fund (23) (22) (21)

Proceeds from Decommissioning Trust Fund Assets 21 13 10

Net cash provided (used) by investing activities (521) (473) (789)

Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total 0 0 0

Cash and cash equivalents at beginning of year 0 0 0

Cash and cash equivalents at end of year 0 0 0

Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]

Property, Plant and Equipment, Additions (1,112) (991) (587)

Increase (Decrease) in Accounts Payable And Accrued Liabilities Related To Capital Expenditures (28) 97 (16)

Capital expenditures $ (1,140) $ (894) $ (603)

v3.25.0.1

Statement of Net Income - NWP - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Revenues [Abstract]

Revenues $ 10,503 $ 10,907 $ 10,965

Costs and Expenses [Abstract]

Depreciation and amortization expenses 1,800 1,700 1,500

Other Operating Income (Expense), Net (60) (30) 28

Operating income (loss) 3,339 4,311 3,018

Interest Expense, Nonoperating (1,364) (1,236) (1,147)

Other Nonoperating Income (Expense) 108 99 18

Net income (loss) attributable to The Williams Companies, Inc. 2,225 3,179 2,049

Northwest Pipeline LLC [Member]

Revenues [Abstract]

Revenues 444 440 448

Costs and Expenses [Abstract]

Utilities Operating Expense, Maintenance and Operations 95 88 84

General and Administrative Expense 51 51 52

Depreciation and amortization expenses 111 111 114

Taxes, Miscellaneous 14 12 17

Other Operating Income (Expense), Net (18) (16) 22

Operating Expenses 253 246 289

Operating income (loss) 191 194 159

Interest Expense, Nonoperating (28) (28) (31)

Public Utilities, Allowance for Funds Used During Construction, Additions 10 4 3

Other Nonoperating Income (Expense) 7 10 6

Net income (loss) attributable to The Williams Companies, Inc. 180 180 137

Natural Gas, US Regulated | Northwest Pipeline LLC [Member]

Revenues [Abstract]

Revenues 416 415 430

Natural Gas, Storage | Northwest Pipeline LLC [Member]

Revenues [Abstract]

Revenues 15 15 13

Product and Service, Other | Northwest Pipeline LLC [Member]

Revenues [Abstract]

Revenues $ 13 $ 10 $ 5

v3.25.0.1

Balance Sheet - NWP - USD ($)
$ in Millions

Dec. 31, 2024

Dec. 31, 2023

Assets, Current [Abstract]

Cash and cash equivalents $ 60 $ 2,150

Inventory, Net 279 274

Other current assets and deferred charges 192 195

Current assets 2,661 4,513

Property, Plant and Equipment, Net 38,692 34,311

Other Assets, Noncurrent 1,830 1,573

Total assets 54,532 52,627

Liabilities, Current [Abstract]

Accounts payable 1,613 1,379

Regulatory Liability, Current 85 77

Other current liabilities 1,360 1,284

Total current liabilities 5,312 5,830

Contingent liabilities and commitments

Members' Equity [Abstract]

Retained Earnings (Accumulated Deficit) (12,396) (12,287)

Total liabilities and equity 54,532 52,627

Northwest Pipeline LLC [Member]

Assets, Current [Abstract]

Cash and cash equivalents 0 0

Accounts and Other Receivables, Net, Current 2 1

Inventory, Net 9 8

Regulatory Assets, Current 6 2

Other current assets and deferred charges 6 5

Current assets 62 214

Property, Plant and Equipment, Net 2,129 1,949

Regulatory Assets, Noncurrent 49 36

Other Assets, Noncurrent 29 28

Total assets 2,269 2,227

Liabilities, Current [Abstract]

Accounts Payable, Trade, Current 48 48

Regulatory Liability, Current 20 21

Other current liabilities 34 34

Long-Term Debt, Current Maturities 85 0

Total current liabilities 225 116

Long-Term Debt, Excluding Current Maturities 497 581

Regulatory Liabilities, Noncurrent 233 252

Asset Retirement Obligations, Noncurrent 144 136

Other Liabilities, Noncurrent 7 9

Contingent liabilities and commitments

Members' Equity [Abstract]

Members' Capital 1,074 1,074

Retained Earnings (Accumulated Deficit) 89 59

Total Members' Equity 1,163 1,133

Total liabilities and equity 2,269 2,227

Northwest Pipeline LLC [Member] | Related Party

Assets, Current [Abstract]

Accounts and Financing Receivable, after Allowance for Credit Loss, Current 0 158

Accounts Receivable, after Allowance for Credit Loss, Current 0 1

Liabilities, Current [Abstract]

Accounts payable 12 13

Northwest Pipeline LLC [Member] | Nonrelated Party

Assets, Current [Abstract]

Accounts Receivable, after Allowance for Credit Loss, Current 39 39

Northwest Pipeline LLC [Member] | Affiliated Entity

Assets, Current [Abstract]

Accounts and Financing Receivable, after Allowance for Credit Loss, Current 158

Liabilities, Current [Abstract]

Accounts payable $ 26 $ 0

v3.25.0.1

Statement of Changes in Member's Equity - NWP - USD ($)
$ in Millions

Total

Northwest Pipeline LLC [Member]

Member's Capital

Northwest Pipeline LLC [Member]

Retained Earnings

Northwest Pipeline LLC [Member]

Balance at beginning of year at Dec. 31, 2021 $ 1,074 $ 35

Net income $ 2,049 $ 137 137

Cash distributions to parent 138 (138)

Balance at end of year at Dec. 31, 2022 1,108 1,074 34

Net income 3,179 180 180

Cash distributions to parent 155 (155)

Balance at end of year at Dec. 31, 2023 1,133 1,074 59

Net income $ 2,225 180 180

Cash distributions to parent 150 (150)

Balance at end of year at Dec. 31, 2024 $ 1,163 $ 1,074 $ 89

v3.25.0.1

General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies
12 Months Ended

Dec. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies [Text Block]
Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies
General
This report includes information for multiple registrants, specifically The Williams Companies, Inc. (Williams), as well as Transcontinental Gas Pipe Line Company, LLC (Transco) and Northwest Pipeline LLC (NWP) both of which are wholly owned subsidiaries of Williams (collectively, the Registrants). References to subsidiaries by name, including equity-method investees, Transco, and NWP, refer exclusively to those businesses and operations.
Description of Business
Williams
Williams is a Delaware corporation whose common stock is listed and traded on the New York Stock Exchange. Its operations are located in the United States and are presented within the following reportable segments:
Transmission & Gulf of America, Northeast G&P, West, and Gas & NGL Marketing Services, consistent with the manner in which Williams’ Chief Executive Officer, the chief operating decision maker, evaluates performance and allocates resources. All remaining business activities, including upstream operations, certain new energy ventures, and corporate activities, are included in Other.
Transmission & Gulf of America is comprised of the Transco, NWP, and MountainWest Pipelines Holding Company (MountainWest) interstate natural gas pipelines and their related natural gas storage facilities, as well as the natural gas gathering and processing and crude oil production handling and transportation assets in the Gulf Coast region, including Discovery Producer Services LLC (Discovery), a former 60 percent equity-method investment in which Williams acquired the remaining ownership interest in August 2024 (see Note 3 – Acquisitions and Divestitures), a 51 percent interest in Gulfstar One LLC (Gulfstar One) (a consolidated variable interest entity, or VIE), and a 50 percent equity-method investment in Gulfstream Natural Gas System, L.L.C. (Gulfstream). Transmission & Gulf of America also includes natural gas storage facilities and pipelines providing services in north Texas, and also in Louisiana and Mississippi related to the January 2024 Gulf Coast Storage Acquisition (see Note 3 – Acquisitions and Divestitures).
Northeast G&P is comprised of Williams’ midstream gathering, processing, and fractionation businesses in the Marcellus Shale region primarily in Pennsylvania and New York, and the Utica Shale region of eastern Ohio, as well as a 65 percent interest in Ohio Valley Midstream LLC (Northeast JV) (a consolidated VIE) which operates in West Virginia, Ohio, and Pennsylvania, a 66 percent interest in Cardinal Gas Services, L.L.C. (Cardinal) (a consolidated VIE) which operates in Ohio, a 69 percent equity-method investment in Laurel Mountain Midstream, LLC (Laurel Mountain), a 50 percent equity-method investment in Blue Racer Midstream LLC (Blue Racer), and Appalachia Midstream Services, LLC, a wholly owned subsidiary that owns equity-method investments with an approximate average 66 percent interest in multiple gas gathering systems in the Marcellus Shale region (Appalachia Midstream Investments).
West is comprised of Williams’ gas gathering, processing, and treating operations in the Rocky Mountain region of Colorado and Wyoming, the Barnett Shale region of north-central Texas, the Eagle Ford Shale region of south Texas, the Haynesville Shale region of east Texas and northwest Louisiana, the Mid-Continent region which includes the Anadarko and Permian basins, and the Denver-Julesberg Basin (DJ Basin) of Colorado which includes Rocky Mountain Midstream Holdings LLC (RMM), a former 50 percent equity-method investment that Williams acquired the remaining ownership interest in November 2023 (see Note 3 – Acquisitions and Divestitures). This segment also includes Williams’ natural gas liquid (NGL) storage facilities, an undivided 50 percent interest in an NGL fractionator near Conway, Kansas, and a 50 percent equity-method investment in Overland Pass Pipeline Company LLC (OPPL).
Gas & NGL Marketing Services is comprised of Williams’ NGL and natural gas marketing and trading operations, which includes risk management and transactions related to the storage and transportation of natural gas and NGLs on strategically positioned assets.
Transco
Transco is an interstate natural gas transmission company that owns and operates a natural gas pipeline system extending from Texas, Louisiana, Mississippi and the Gulf of America through Alabama, Georgia, South Carolina, North Carolina, Virginia, Maryland, Delaware, Pennsylvania, and New Jersey to the New York City metropolitan area. The system serves customers in Texas and the 12 southeast and Atlantic seaboard states mentioned above, including major metropolitan areas in Georgia, Washington D.C., Maryland, North Carolina, New York, New Jersey, and Pennsylvania. Transco is a single-member limited liability company, and as such, single-member losses are limited to the amount of its investment.
NWP
NWP owns and operates an interstate pipeline system for the mainline transmission of natural gas. This system extends from the San Juan Basin in northwestern New Mexico and southwestern Colorado through Colorado, Utah, Wyoming, Idaho, Oregon, and Washington to a point on the Canadian border near Sumas, Washington. NWP is a single-member limited liability company, and as such, single-member losses are limited to the amount of its investment.
Basis of Presentation
Discontinued Operations
During 2023, Williams recorded pre-tax charges of $125 million to Income (loss) from discontinued operations in the Consolidated Statement of Income related to litigation associated with its former Alaska refinery. Payments were made in January 2024 and the claims against Williams are now resolved. Except for this item and unless indicated otherwise, the information in the Combined Notes to Financial Statements relates to continuing operations.
Net gain from Energy Transfer Litigation Judgment
In November 2023, Williams received a $627 million payment from Energy Transfer Equity, L.P. (Energy Transfer) for the final order and judgment in connection to a lawsuit for breach of the Agreement and Plan of Merger with Energy Transfer. On the same day, Williams paid attorney fees which had been incurred on a contingent fee basis. This resulted in a net gain of $534 million reported as Net gain from Energy Transfer litigation judgment in the Consolidated Statement of Income for the year ended December 31, 2023.
Reclassifications

Certain prior-year amounts for Transco and NWP have been reclassified to conform to the current year’s presentation. These reclassifications had no impact on Transco’s or NWP’s net income (loss), working capital, cash flows or total member’s equity previously reported.
Summary of Significant Accounting Policies
Principles of Consolidation
Williams’ consolidated financial statements include the accounts of all entities that Williams controls and its proportionate interest in the accounts of certain ventures in which it owns an undivided interest. Management’s judgment is required to evaluate whether it controls an entity. Key areas of that evaluation include:
•Determining whether an entity is a VIE (see Note 2 – Variable Interest Entities);
•Determining whether Williams is the primary beneficiary of a VIE, including evaluating which activities of a VIE most significantly impact its economic performance and the degree of power that Williams and its related parties have over those activities through its variable interests;
•Identifying events that require reconsideration of whether an entity is a VIE and continuously evaluating whether Williams is a VIE’s primary beneficiary;
•Evaluating whether other owners in entities that are not VIEs are able to effectively participate in significant decisions that would be expected to be made in the ordinary course of business such that Williams does not have the power to control such entities.
Williams applies the equity method of accounting to investments over which it exercises significant influence but does not control. Distributions received from equity-method investees are presented in the Consolidated Statement of Cash Flows according to the nature of the distributions approach, which classifies distributions
received from equity-method investees as either returns on investment (cash inflows from operating activities) or returns of investment (cash inflows from investing activities) based on the nature of the activities of the equity-method investee that generated the distribution.
Use of Estimates
The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying combined notes. Actual results could differ from those estimates.
Significant estimates and assumptions may include:
•Impairment assessments of investments, property, plant, and equipment, and intangible assets;
•Litigation-related contingencies;
•Environmental remediation obligations;
•Depreciation and amortization of long-lived assets, which are comprised of property, plant, and equipment, and intangible assets;
•Depreciation and/or amortization of equity-method investment basis differences;
•Asset retirement obligations (AROs);
•Measurement of fair value of commodity derivatives;
•Pension and postretirement valuation variables;
•Measurement of regulatory assets and liabilities;
•Measurement of deferred income tax assets and liabilities, including assumptions related to the realization of deferred income tax assets;
•Revenue recognition, including estimates utilized in recognition of deferred revenue;
•Purchase price accounting.
These estimates are discussed further throughout these combined notes.
Regulatory Accounting
Transco, NWP, and MountainWest are regulated by the Federal Energy Regulatory Commission (FERC), and these regulated entities’ rates may also be negotiated with customers pursuant to the terms of tariffs and FERC policy. Therefore, management has determined that it is appropriate under Accounting Standards Codification (ASC) Topic 980, “Regulated Operations,” (ASC 980) that certain costs that would otherwise be charged to expense should be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense should be deferred as regulatory liabilities, based on the expected return to customers in future rates. Management’s expected recovery of deferred costs and return of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment. Certain incurred costs and obligations are recorded as regulatory assets or liabilities if, based on regulatory orders or other available evidence, it is probable that the costs or obligations will be included in amounts allowable for recovery or refunded in future rates. Accounting for these operations that are regulated can differ from the accounting requirements for nonregulated operations. For example, for regulated operations, allowance for funds used during construction (AFUDC) represents the estimated cost of debt and equity funds applicable to utility plant in the process of construction and is capitalized as a cost of property, plant, and equipment because it constitutes an
actual cost of construction under established regulatory practices; nonregulated operations are only allowed to capitalize the cost of debt funds related to construction activities, while a component for equity is prohibited. Management has determined that for its regulated entities, it is appropriate to apply the accounting prescribed by ASC 980 and, accordingly, the accompanying financial statements include the effects of the types of transactions described above that result from regulatory accounting requirements (see Note 10 – Regulatory Assets and Liabilities).

The FERC has prescribed a formula to be used in computing separate allowances for borrowed and equity AFUDC. These allowances are recorded as follows:

Transco

Year Ended December 31,
2024 2023 2022
(Millions)
Allowance for borrowed funds used during construction $ 17 $ 14 $ 5
Allowance for equity funds used during construction
71 63 23
Allowance for equity and borrowed funds used during construction (AFUDC)
$ 88 $ 77 $ 28
NWP

Year Ended December 31,
2024 2023 2022
(Millions)
Allowance for borrowed funds used during construction $ 2 $ 1 $ 1
Allowance for equity funds used during construction
8 3 2
Allowance for equity and borrowed funds used during construction (AFUDC)
$ 10 $ 4 $ 3
Revenue Recognition
Customers in Williams’ gas pipeline businesses, including Transco and NWP, are comprised of public utilities, municipalities, gas marketers and producers, intrastate pipelines, direct industrial users, and electrical power generators. Customers in Williams’ midstream businesses are comprised of oil and natural gas producer counterparties. Customers for Williams’ product sales are comprised of public utilities, gas marketers, and direct industrial users.
Service revenue contracts from Williams’ gas pipeline and midstream businesses, including Transco and NWP, contain a series of distinct services, with the majority of the contracts having a single performance obligation that is satisfied over time as the customer simultaneously receives and consumes the benefits provided. Most of the product sales contracts have a single performance obligation with revenue recognized at a point in time when the products have been sold and delivered to the customer.
Certain customers reimburse Williams for costs it incurs associated with construction of property, plant, and equipment utilized in its operations. For Williams’ rate-regulated gas pipeline businesses, including Transco and NWP, that apply ASC 980, Williams follows FERC guidelines with respect to reimbursement of construction costs. FERC tariffs only allow for cost reimbursement and are non-negotiable in nature; thus, in management’s judgment, the construction activities do not represent an ongoing major and central operation of the gas pipeline businesses and are not within the scope of ASC Topic 606, “Revenue from Contracts with Customers”. Accordingly, cost reimbursements are treated as a reduction to the cost of the constructed asset. For the midstream businesses, reimbursement and service contracts with customers are viewed together as providing the same commercial objective, as Williams has the ability to negotiate the mix of consideration between reimbursements and amounts
billed over time. Accordingly, Williams generally recognizes reimbursements of construction costs from customers on a gross basis as a contract liability separate from the associated costs included within property, plant, and equipment. The contract liability is recognized into service revenues as the underlying performance obligations are satisfied.
Service Revenues
Gas pipeline businesses
Revenues from the regulated interstate natural gas pipeline businesses, including Transco and NWP, which are subject to regulation by certain state and federal authorities, including the FERC, include both firm and interruptible transportation and storage contracts. Firm transportation and storage agreements provide for a daily or monthly reservation charge based on the pipeline or storage capacity reserved, and a commodity charge based on the volume of natural gas delivered/stored, each at rates specified in the FERC tariffs or based on negotiated contractual rates, with contract terms that are generally long-term in nature. Most of the long-term contracts contain an evergreen provision, which allows the contracts to be extended for periods primarily up to one year in length an indefinite number of times following the specified contract term and until terminated generally by either party. Interruptible transportation and storage agreements provide for a volumetric charge based on actual commodity transportation or storage utilized in the period in which those services are provided, and the contracts are generally limited to one-month periods or less. The related performance obligations include the following:
•Firm transportation or storage under firm transportation and storage contracts—an integrated package of services typically constituting a single performance obligation, which includes standing ready to provide such services and receiving, transporting or storing (as applicable), and redelivering commodities;
•Interruptible transportation or storage under interruptible transportation and storage contracts—an integrated package of services typically constituting a single performance obligation once scheduled, which includes receiving, transporting or storing (as applicable), and redelivering commodities.
In situations where, in management’s judgment, it considers the integrated package of services as a single performance obligation, which represents a majority of its interstate natural gas pipeline contracts with customers, management does not consider there to be multiple performance obligations because the nature of the overall promise in the contract is to stand ready (with regard to firm transportation and storage contracts), receive, transport or store, and redeliver natural gas to the customer; therefore, revenue is recognized over time upon satisfaction of the daily stand ready performance obligation.
Revenues are recognized for reservation charges over the performance obligation period, which is the contract term, regardless of the volume of natural gas that is transported or stored. Revenues for commodity charges from both firm and interruptible transportation services and storage services are recognized when natural gas is delivered at the agreed upon delivery point or when natural gas is injected or withdrawn from the storage facility because they specifically relate to efforts to provide these distinct services. Generally, reservation charges and commodity charges in the interstate natural gas pipeline businesses are recognized as revenue in the same period they are invoiced to its customers. As a result of the ratemaking process, certain amounts collected may be subject to refund upon the issuance of final orders by the FERC in pending rate proceedings. Management uses judgment to record estimates of rate refund liabilities considering its and other third-party regulatory proceedings, advice of counsel, and other risks. As of December 31, 2024 and 2023, there were no such rate refund liabilities for Transco and NWP.
Midstream businesses
Revenues from the nonregulated gathering, processing, transportation, and storage midstream businesses include contracts for natural gas gathering, processing, treating, compression, transportation, and other related services with contract terms that are generally long-term in nature and may extend up to the production life of the associated reservoir. Additionally, the midstream businesses generate revenues from fees charged for storing customers’ natural gas and NGLs, generally under prepaid contracted storage capacity contracts. In situations where, in management’s judgment, it provides an integrated package of services combined into a single performance obligation, which represents a majority of this class of contracts with customers, Williams does not consider there to be multiple performance obligations because the nature of the overall promise in the contract is to provide gathering, processing, transportation, storage, and related services resulting in the delivery, or redelivery in the context of storage services, of pipeline-quality natural gas and NGLs to the customer. As such, revenue is recognized at the daily completion of the integrated package of services as the integrated package represents a single performance obligation. Additionally, certain contracts in the midstream businesses contain fixed or upfront payment terms that result in the deferral of revenues until such services have been performed or such capacity has been made available.
Williams also earns revenues from offshore crude oil and natural gas gathering and transportation and offshore production handling. These services represent an integrated package of services and are considered a single distinct performance obligation for which Williams recognizes revenues as the services are provided to the customer.
Williams generally earns a contractually stated fee per unit for the volume of product transported, gathered, processed, or stored. The rate is generally fixed; however, certain contracts contain variable rates that are subject to change based on commodity prices, levels of throughput, or an annual adjustment based on a formulaic cost-of-service calculation. In addition, Williams has contracts with contractually stated fees that decline over the contract term, such as declines based on the passage of time periods or achievement of cumulative throughput amounts. The excess of consideration received over revenue recognized results in the deferral of those amounts until future periods based on a units of production or straight-line methodology as these methods appropriately match the consumption of services provided to the customer. The units of production methodology requires the use of production estimates that are uncertain and the use of judgment when developing estimates of future production volumes, thus impacting the rate of revenue recognition. Production estimates are monitored as circumstances and events warrant. Certain of Williams’ gas gathering and processing agreements have minimum volume commitments (MVC). If a customer under such an agreement fails to meet its MVC for a specified period (thus not exercising all the contractual rights to gathering and processing services within the specified period, herein referred to as “breakage”), it is obligated to pay a contractually determined fee based upon the shortfall between the actual gathered or processed volumes and the MVC for the period contained in the contract. When Williams concludes, based on management’s judgment, it is probable that the customer will not exercise all or a portion of its remaining rights, Williams recognizes revenue associated with such breakage amount in proportion to the pattern of exercised rights within the respective MVC period.
Under keep-whole and percent-of-liquids processing contracts, Williams receives commodity consideration in the form of NGLs and takes title to the NGLs at the tailgate of the plant. Williams recognizes such commodity consideration as service revenue based on the market value of the NGLs retained at the time the processing is provided. The current market value, as opposed to the market value at the contract inception date, is used due to a combination of factors, including the fact that the volume, mix, and market price of NGL consideration to be received is unknown at the time of contract execution and is not specified in Williams’ contracts with customers. Additionally, product sales revenue (discussed below) is recognized upon the sale of the NGLs to a third party based on the sales price at the time of sale. As a result, revenue is recognized in the Consolidated Statement of Income both at the time the processing service is provided in Service revenues – commodity consideration and at the time the NGLs retained as part of the processing service are sold in Product
sales. The recognition of revenue related to commodity consideration has the impact of increasing the book value of NGL inventory, resulting in higher cost of goods sold at the time of sale.
Product Sales
In the course of providing transportation services to customers of the gas pipeline businesses, including Transco, and gathering and processing services to customers of the midstream businesses, different quantities of natural gas may be received from customers than the quantities delivered on behalf of those customers. The resulting imbalances are primarily settled monthly through the purchase or sale of natural gas with each customer under terms provided for in FERC tariffs or gathering and processing agreements, respectively. Revenue is recognized for Transco from the sale of natural gas upon settlement of imbalances (see Gas Imbalances below).
In certain instances, Williams purchases NGLs, crude oil, and natural gas from its oil and natural gas producer customers which Williams remarkets. In addition, Williams retains NGLs as consideration in certain processing arrangements, as discussed above in the Service Revenues - Midstream businesses section. Williams also markets natural gas and NGLs from the production at its upstream properties. Williams recognizes revenue from the sale of these commodities when the products have been sold and delivered. Williams’ product sales contracts are primarily short-term contracts based on prevailing market rates at the time of the transaction.
Williams purchases natural gas for storage when the current market price paid to buy and transport natural gas plus the cost to store and finance the natural gas is less than an estimated, forward market price that can be received in the future, resulting in positive net product sales. Commodity-based exchange-traded futures contracts and over-the-counter (OTC) contracts are used to sell natural gas at that future price to substantially protect the natural gas revenues that will ultimately be realized when the stored natural gas is sold. Additionally, Williams enters into transactions to secure transportation capacity between delivery points in order to serve its customers and various markets.
The physical purchase, transportation, storage, and sale of natural gas associated with these natural gas purchases are accounted for on a weighted-average cost or accrual basis, as appropriate, unlike the fair value basis utilized for the commodity derivatives used to mitigate the natural gas price risk associated with the storage and transportation portfolio. Monthly demand charges are incurred for contracted storage and transportation capacity and payments associated with asset management agreements and these demand charges and payments are recognized in the Consolidated Statement of Income in the period they are incurred.
As Williams is acting as an agent for its natural gas marketing customers and engages in energy trading activities, its natural gas marketing revenues are presented net of the related costs of those activities.
Contract Assets
Williams
Contract assets in the Consolidated Balance Sheet primarily consist of revenue recognized under contracts containing MVC features whereby management has concluded it is probable there will be a short-fall payment at the end of the current MVC period, which typically follows the calendar year, and that a significant reversal of revenue recognized currently for the future MVC payment will not occur. As a result, Williams’ contract assets related to its future MVC payments are generally expected to be collected within the next 12 months and are included within Other current assets and deferred charges in the Consolidated Balance Sheet until such time as the MVC short-fall payments are invoiced to the customer.
Transco and NWP
Transco’s contract assets primarily result from the modification of an existing contract resulting in increased rates. NWP’s contract assets consist of discounts provided to customers in the beginning of the contract term that are recognized on a straight-line basis over the entire contract term resulting in revenue
recognition occurring prior to actual billings. Current and noncurrent contract assets are included within Other current assets and deferred charges and Deferred charges and other, respectively, in the Balance Sheets.
Contract Liabilities
Williams
Contract liabilities in the Consolidated Balance Sheet consist of advance payments primarily from midstream business customers which include construction reimbursements, prepayments, and other billings and transactions for which future services are to be provided under the contract. These amounts are deferred until recognized in revenue when the associated performance obligation has been satisfied, which is primarily based on a units of production methodology over the remaining contractual service periods, and are classified as current or noncurrent according to when such amounts are expected to be recognized. Current and noncurrent contract liabilities are included within Other current liabilities and Regulatory liabilities, deferred income, and other, respectively, in the Consolidated Balance Sheet.
Contracts requiring advance payments and the recognition of contract liabilities are evaluated to determine whether the advance payments provide Williams with a significant financing benefit. This determination is based on the combined effect of the expected length of time between when Williams transfers the promised good or service to the customer, when the customer pays for those goods or services, and the prevailing interest rates. Williams has assessed its contracts for significant financing components and determined, in management’s judgment, that one group of contracts entered into in contemplation of one another for certain capital reimbursements contains a significant financing component. As a result, Williams recognizes noncash interest expense based on the effective interest method and revenue (noncash) is recognized when the underlying asset is placed into service utilizing a units of production or straight-line methodology over the life of the corresponding customer contract.
Transco and NWP
Transco’s contract liabilities consist of advance payments from customers, which include prepayments, and other billings for which future services are to be provided under the contract, and NWP’s contract liabilities consist of a fixed rate facility charge billed to customers with a declining rate structure in its tariffs. Transco assessed its contracts and determined none contain a significant financing component. These liabilities are classified as current or noncurrent according to when such amounts are expected to be recognized. Current and noncurrent contract liabilities are included within Other current liabilities and Deferred charges and other, respectively, in the Balance Sheets.
Commodity Derivative Instruments and Hedging Activities
Williams is exposed to commodity price risk and utilizes derivatives to manage a portion of its commodity price risk. These instruments consist primarily of swaps, futures, and forward contracts involving short- and long-term purchases and sales of energy commodities. Williams purchases natural gas for storage when the current market price paid to buy and transport natural gas plus the cost to store and finance the natural gas is less than an estimated, forward market price that can be received in the future. Additionally, Williams enters into transactions to secure transportation capacity between delivery points in order to serve its customers and various markets. Commodity-based exchange-traded futures contracts and OTC contracts are used to capture the price differential or spread between the locations served by the capacity in order to substantially protect the natural gas revenues that will ultimately be realized when the physical flow of natural gas between receipt and delivery points occurs. Some commodity derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the natural gas marketing operations. These contracts generally meet the definition of derivatives and are typically not designated as hedges for accounting purposes. When a commodity derivative contract is settled physically, any cumulative unrealized gain or loss is reversed, and the contract price is recognized in the respective line item in the Consolidated Statement of Income representing the
actual price of the underlying goods being delivered. As of December 31, 2024 and 2023, Williams is not applying hedge accounting to any commodity derivative instruments.
Unrealized gains and losses from physically settled commodity derivative contracts for commodity sales transactions are recognized in Net gain (loss) from commodity derivatives in the Consolidated Statement of Income. Realized and unrealized gains and losses from non-designated commodity derivative contracts for commodity sales transactions that are financially settled are reported in Net gain (loss) from commodity derivatives in the Consolidated Statement of Income. Net gains and losses from derivatives for shrink gas purchases for processing plants are reported in Net processing commodity expenses in the Consolidated Statement of Income.
Williams experiences significant earnings volatility from the fair value accounting required for the derivatives used to hedge a portion of the economic value of the underlying transportation and storage portfolio as well as upstream related production. However, the unrealized fair value measurement gains and losses are generally offset by valuation changes in the economic value of the underlying production or transportation and storage contracts, which is not recognized until the underlying transaction occurs. (See Note 17 – Commodity Derivatives.)
Williams reports the fair value of derivatives, except those for which the normal purchases and normal sales exception has been elected, in Derivative assets; Regulatory assets, deferred charges, and other; Derivative liabilities; or Regulatory liabilities, deferred income, and other in the Consolidated Balance Sheet. These amounts are presented on a net basis and reflect the netting of asset and liability positions permitted under the terms of master netting arrangements and cash held on deposit in margin accounts that Williams has received or remitted to collateralize certain derivative positions. Williams determines the current and noncurrent classification based on the timing of expected future cash flows of individual trades.
The accounting for the changes in fair value of a commodity derivative can be summarized as follows:
Derivative Treatment Accounting Method
Normal purchases and normal sales exception Accrual accounting
All other derivatives Mark-to-market accounting
Williams may elect the normal purchases and normal sales exception for certain short- and long-term purchases and sales of physical energy commodities. Under accrual accounting, any change in the fair value of these derivatives is not reflected in the Consolidated Balance Sheet after the initial election of the exception.
Interest Capitalized
For its non-regulated companies, Williams capitalizes interest on its debt using the weighted-average interest rate on debt excluding debt issued by Transco, NWP, and MountainWest. This is included in Interest expense in Williams’ Consolidated Statement of Income.
For Williams’ regulated interstate natural gas pipelines, including Transco, NWP, and MountainWest, interest is capitalized from its borrowed funds and from internally generated funds (equity AFUDC) (see Regulatory Accounting). The former is included in Interest expense and the latter is included in Other income (expense) – net below Operating income (loss) in Williams’ Consolidated Statement of Income and Allowance for equity and borrowed funds used during construction (AFUDC) in Transco and NWP’s Statement of Net Income (see Note 9 – Property, Plant, and Equipment).
Income Taxes
Williams includes the operations of its domestic corporate subsidiaries and income from its subsidiary partnerships, as well as income from Transco and NWP which are treated as pass-through entities for state and local income tax purposes, in its consolidated federal income tax return and also files tax returns in various foreign and state jurisdictions as required. Deferred income taxes are computed using the liability method and are provided on
all temporary differences between the financial basis and the tax basis of its assets and liabilities. Management’s judgment and income tax assumptions are used to determine the levels, if any, of valuation allowances associated with deferred tax assets.
Earnings (Loss) Per Common Share
Williams’ Basic earnings (loss) per common share in the Consolidated Statement of Income is based on the sum of the weighted-average number of common shares outstanding and vested restricted stock units. Diluted earnings (loss) per common share in the Consolidated Statement of Income primarily includes any dilutive effect of nonvested restricted stock units and stock options. Diluted earnings (loss) per common share may also include any dilutive effect of Williams’ preferred stock. Diluted earnings (loss) per common share is calculated using the treasury-stock method.
Cash and Cash Equivalents
Cash and cash equivalents in the Consolidated Balance Sheet consist of highly liquid investments with original maturities of three months or less when acquired.
Accounts Receivable
Accounts receivable are carried on a gross basis, with no discounting, less an allowance for doubtful accounts. Management estimates the allowance for doubtful accounts, considering current expected credit losses using a forward-looking “expected loss” model, the financial condition of its customers, and the age of past due accounts. The majority of trade receivable balances are due within 30 days. Management monitors the credit quality of its counterparties through review of collection trends, credit ratings, and other analyses, such as bankruptcy monitoring. Williams’ financial assets from its natural gas transmission business, natural gas storage business, gathering, processing and transportation business, marketing business, and upstream operations, as applicable, are segregated into separate pools for evaluation due to different counterparty risks inherent in each business, with Transco’s and NWP’s financial assets each evaluated as one pool. Changes in counterparty risk factors could lead to reassessment of the composition of financial assets as one pool, separate pools, or the need for additional pools. Management calculates its allowance for credit losses incorporating an aging method. In estimating its expected credit losses, management utilizes historical loss rates over many years, which for Williams includes periods of both high and low commodity prices. Transco’s and NWP’s expected credit loss estimates considered both internal and external forward-looking commodity price expectations, as well as counterparty credit ratings, and factors impacting near-term liquidity.
Commodity prices could have a significant impact on a portion of Williams’ gathering and processing and upstream counterparties’ financial health and ability to satisfy current obligations. Williams’ expected credit loss estimate considers both internal and external forward-looking commodity price expectations, as well as counterparty credit ratings, and factors impacting near-term liquidity. In addition, Williams’ expected credit loss estimate considers potential contractual, physical, and commercial protections and outcomes in the case of a counterparty bankruptcy. The physical location and nature of Williams’ services help to mitigate collectability concerns of its gathering and processing producer customers. Williams’ gathering lines in many cases are physically connected to the customers’ wellheads and pads, and there may not be alternative gathering lines nearby. The construction of gathering systems is capital intensive and it would be costly for others to replicate, especially considering the depletion to date of the associated reserves. As a result, Williams plays a critical role in getting customers’ production from the wellhead to a marketable condition and location. This tends to reduce collectability risk as Williams’ services enable producers to generate operating cash flows. Commodity price movements generally do not impact the majority of Williams’ natural gas transmission businesses customers’ financial condition.
Williams also provides marketing and risk management services to retail and wholesale gas marketers, utility companies, upstream producers, and industrial customers. These counterparties utilize netting agreements that enable Williams to net receivables and payables by counterparty upon settlement. Williams also nets across product lines and against cash collateral received to collateralize receivable positions, provided the netting and cash
collateral agreements include such provisions. While the amounts due from, or owed to, Williams’ counterparties are settled net, these amounts are recorded on a gross basis in the Consolidated Balance Sheet as accounts receivable and accounts payable.
Extended payment terms are not offered and payments are typically received within one month. Receivables are considered past due if full payment is not received by the contractual due date. Past due accounts are generally written off against the allowance for doubtful accounts only after all collection attempts have been exhausted. Neither Williams, Transco, nor NWP have a material amount of significantly aged receivables at December 31, 2024 or 2023.
Gas Imbalances
Transco
Transco transports gas on various pipeline systems which may deliver different quantities of gas on behalf of Transco than the quantities of gas received from Transco. These transactions result in gas transportation and exchange imbalance receivables and payables which are recovered or repaid in cash or through the receipt or delivery of gas in the future and are recorded in the accompanying Balance Sheet. Revenues received from the cash-out of transportation imbalances in excess of costs incurred are deferred and offset by the deferral of costs incurred in excess of revenues received. At the end of each annual August through July reporting period, if the cumulative revenues received exceed the costs incurred, the over recovered amounts are applied to any prior under recovery balance or refunded. If the cumulative revenues received are less than the costs incurred, the net under recovered amounts are carried forward and offset against any future net over recoveries that may occur in a subsequent annual reporting period. These deferred recoveries are recognized as Regulatory assets in Transco’s Balance Sheet (see Note 10 – Regulatory Assets and Liabilities).
The settlement of imbalances requires agreement between the pipelines and shippers as to allocations of volumes to specific transportation contracts and timing of delivery of gas based on operational conditions. These imbalances are classified as Other current assets and deferred charges and Other current liabilities in Transco’s Balance Sheet (see Note 10 – Regulatory Assets and Liabilities). Transco utilizes the average cost method of accounting for gas imbalances.
NWP
In the course of providing transportation services to customers, NWP may receive different quantities of natural gas from customers than the quantities delivered on behalf of those customers or consumed in fuel to operate NWP’s system. The resulting customer imbalances are typically settled through the receipt or delivery of gas in the future based on the timelines outlined in NWP’s tariff, whereas the over/under recovery of fuel is cleared up through NWP’s semi-annual fuel tracker. Customer imbalances to be repaid or recovered in-kind are recorded as Other current assets and deferred charges or Other current liabilities in NWP’s Balance Sheet. The under recovery of fuel is recorded as Regulatory assets and the over recovery is recorded in Regulatory liabilities in NWP’s Balance Sheet (see Note 10 – Regulatory Assets and Liabilities). These imbalances are valued at published spot rates.
Inventories
Inventories in Williams’ Consolidated Balance Sheet primarily consist of NGLs, materials and supplies, and natural gas in underground storage and are primarily stated at the lower of cost or net realizable value. The cost of inventories are primarily determined using the average cost method. Inventories in Transco’s and NWP’s Balance Sheets primarily consist of materials and supplies and natural gas in underground storage.
Transco and NWP Environmental Matters
Transco and NWP are subject to federal, state, and local environmental laws and regulations. Environmental expenditures are expensed or capitalized depending on the economic benefit and potential for rate recovery. These
entities believe that expenditures required to meet applicable environmental laws and regulations are prudently incurred in the ordinary course of business and such expenditures would be permitted to be recovered through rates with limited exceptions.
In accordance with the Climate Commitment Act of the state of Washington, which established a market-based cap-and-invest program, NWP is required to obtain emission allowances for the carbon emissions from nine of NWP’s thirteen compressor stations within the state of Washington whose annual carbon emissions exceed 25,000 metric tons of carbon dioxide equivalent at least once since 2015. NWP records the purchased emission allowances at cost and the associated accumulated interest to a regulatory asset. The difference between the allowances held and the allowances required based on actual emissions for the period are measured using an estimate based on NWP’s most recent cost of allowances and accrued to a current liability and to a regulatory asset. NWP’s Petition for Approval of Pre-Filing Stipulation and Settlement Agreement (Settlement) in Docket No. RP22-1155, which FERC approved in 2022, allows NWP to recover the costs of purchasing allowances under the program in its next rate case (see Note 18 – Contingencies and Commitments).
Property, Plant, and Equipment
Property, plant, and equipment is initially recorded at cost. The carrying value of these assets is based on estimates, assumptions, and judgments relative to capitalized costs, useful lives, and salvage values. For the Transco, NWP, and MountainWest interstate natural gas pipelines, these estimates, assumptions and judgments reflect FERC regulations, as well as historical experience and expectations regarding future industry conditions and operations. The FERC identifies installation, construction and replacement costs that are to be capitalized. All other costs are expensed as incurred.
As regulated entities, Transco, NWP and MountainWest provide for depreciation primarily under the composite (group) method using straight-line FERC-prescribed rates. Under this method, assets with similar lives and characteristics are grouped and depreciated as one asset. These regulated entities’ depreciation rates are subject to change each time these regulated entities file a general rate case with the FERC. Included in Transco’s and NWP’s depreciation rates is a negative salvage component (net cost of removal) that Transco and NWP currently collect in rates that is recorded as a regulatory liability in the Balance Sheets (see Note 10 – Regulatory Assets and Liabilities).
Depreciation for Williams’ nonregulated entities is provided primarily on the straight-line method over estimated useful lives.
Williams follows the successful efforts method of accounting for its upstream properties. Its oil and gas producing property costs are depreciated using the units of production method.
Gains or losses from the ordinary sale or retirement of property, plant, and equipment for the Transco, NWP, and MountainWest interstate natural gas pipelines are credited or charged to accumulated depreciation; certain other gains or losses are recorded in Other (income) expense – net included in Operating income (loss) in the statements of income. Gains or losses from the ordinary sale or retirement of property, plant, and equipment for Williams’ nonregulated assets are primarily recorded in Other (income) expense – net included in Operating income (loss) in the Consolidated Statement of Income.
Ordinary maintenance and repair costs are generally expensed as incurred. Costs of major renewals and replacements are capitalized as property, plant, and equipment.
Williams records a liability and increases the basis in the underlying asset for the present value of each expected future ARO at the time the liability is initially incurred, typically when the asset is acquired or constructed. For Williams’ upstream properties, the ARO is recorded based on Williams’ working interest in the underlying properties. As regulated entities, Transco’s and NWP’s depreciation expense and accretion expense are offset and recorded as a regulatory asset as the regulated entities expect to recover these accretion expenses in future rates and measure changes in the liability due to passage of time by applying an interest rate to the liability balance. This step
is recognized as an increase in the carrying amount of the liability included in Operating and maintenance expenses and as a corresponding accretion expense included in Other (income) expense - net in the Consolidated Statement of Income. The regulatory asset is amortized commensurate with these regulated entities’ collection of those costs in rates.
Measurements of AROs include, as a component of future expected costs, an estimate of the price that a third party would demand, and could expect to receive, for bearing the uncertainties inherent in the obligations, sometimes referred to as a market-risk premium.
Goodwill
Goodwill included within Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, as of December 31, 2024, represents the excess of the consideration, plus the fair value of any noncontrolling interest or any previously held equity interest, over the fair value of the net assets acquired. It is not subject to amortization but is evaluated annually as of October 1 for impairment or more frequently if impairment indicators are present that would indicate it is more likely than not that the fair value of the reporting unit is less than its carrying amount. Management first performs a qualitative assessment to test goodwill on a reporting unit by reporting unit basis to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, management compares its estimate of fair value of the reporting unit to its carrying amount, including goodwill. Judgments and assumptions are inherent in management’s estimates of fair value.
Other Identifiable Intangible Assets
Williams’ other identifiable intangible assets included within Intangible assets – net of accumulated amortization in the Consolidated Balance Sheet are primarily related to gas gathering, processing, and fractionation customer relationships. Williams’ other identifiable intangible assets are generally amortized on a straight-line basis over the period in which these assets contribute to its cash flows. Williams evaluates these assets for changes in the expected remaining useful lives and reflects any changes prospectively through amortization over the revised remaining useful life.
Impairment of Property, Plant, and Equipment, Intangible Assets, and Investments
Management evaluates property, plant, and equipment and intangible assets for impairment when, in its judgment, events or circumstances, including probable abandonment, indicate that the carrying value of such assets may not be recoverable. When an indicator of impairment has occurred, management compares its estimate of undiscounted future cash flows attributable to the assets to the carrying value of the assets to determine whether an impairment has occurred and may apply a probability-weighted approach to consider the likelihood of different cash flow assumptions and possible outcomes, including selling the assets in the near term or holding them for the asset’s remaining estimated useful life. If an impairment of the carrying value has occurred, management determines the amount of the impairment to be recognized in the financial statements by estimating the fair value of the assets and recording a loss for the amount that the carrying value exceeds the estimated fair value. This evaluation is performed at the lowest level for which separately identifiable cash flows exist.
For assets identified to be disposed of in the future and considered held for sale, management compares the carrying value to the estimated fair value less the cost to sell to determine if recognition of an impairment is required. Until the assets are disposed of, the estimated fair value, which includes estimated cash flows from operations until the assumed date of sale, is recalculated when related events or circumstances change.
Williams’ investments are evaluated for impairment when, in management’s judgment, events or circumstances indicate that the carrying value of such investments may have experienced an other-than-temporary decline in value. When evidence of loss in value has occurred, management compares its estimate of fair value of the investment to the carrying value of the investment to determine whether an impairment has occurred. If the estimated fair value is
less than the carrying value and management considers the decline in value to be other-than-temporary, the excess of the carrying value over the fair value is recognized in the financial statements as an impairment charge.
Judgment and assumptions are inherent in the estimate of undiscounted future cash flows and an asset’s or investment’s fair value. Additionally, judgment is used to determine the probability of sale with respect to assets considered for disposal.
Equity-Method Investment Basis Differences
Differences between the carrying value of Williams’ equity-method investments and the underlying equity in the net assets of investees are accounted for as if the investees were consolidated subsidiaries. Equity earnings (losses) in the Consolidated Statement of Income includes Williams’ allocable share of net income (loss) of investees adjusted for any depreciation and amortization, as applicable, associated with basis differences.
Leases
Williams, Transco, and NWP recognize operating lease liabilities based on the present value of the future lease payments and have elected to combine lease and nonlease components for all classes of leased assets in the calculation of the lease liability and the offsetting right-of-use asset in the respective Balance Sheets.
Williams’, Transco’s, and NWP’s lease agreements require both fixed and variable periodic payments, with initial terms typically ranging from one year to 20 years for Williams and up to 30 years for Transco and NWP. Payment provisions in certain lease agreements contain escalation factors which may be based on stated rates or a change in a published index at a future time. The amount by which a lease escalates based on the change in a published index, which is not known at lease commencement, is considered a variable payment and is not included in the present value of the future lease payments, which only includes those that are stated or can be calculated based on the lease agreement at lease commencement. In addition to the noncancellable periods, many of Williams’ lease agreements provide for one or more extensions of the lease agreement for periods ranging from one year in length to an indefinite number of times following the specified contract term. Other lease agreements provide for extension terms that allow Williams, Transco, and NWP to utilize the identified leased asset for an indefinite period of time so long as the asset continues to be utilized in its operations. In consideration of these renewal features, management assesses the term of the lease agreements, which includes using judgment in the determination of which renewal periods and termination provisions, when at its sole election, will be reasonably certain of being exercised. Periods after the initial term or extension terms that allow for either party to the lease to cancel the lease are not considered in the assessment of the lease term. Additionally, management has elected to exclude leases with an original term of one year or less, including renewal periods, from the calculation of the lease liability and the offsetting right-of-use asset.
Judgment is used in determining the discount rate upon which the present value of the future lease payments is determined. This rate is based on a collateralized interest rate corresponding to the term of the lease agreement using company, industry, and market information available.
When permitted under its lease agreements, Williams may sublease certain unused office space for fixed periods that could extend up to the length of the original lease agreement.
Pension and Other Postretirement Benefits
The funded status of each of the pension and other postretirement benefit plans is recognized separately in Williams’ Consolidated Balance Sheet as either an asset or liability. The plans’ benefit obligations and net periodic benefit costs (credits) are actuarially determined and impacted by various assumptions and estimates.
The discount rates are determined separately for each of Williams’ pension and other postretirement benefit plans based on an approach specific to Williams’ plans. The year-end discount rates are determined considering a
yield curve comprised of high-quality corporate bonds and the timing of the expected benefit cash flows of each plan.
The expected long-term rates of return on plan assets are determined by combining a review of the historical returns within the portfolio, the investment strategy included in the plans’ investment policy statement, and capital market projections for the asset classes in which the portfolio is invested, as well as the weighting of each asset class.
Unrecognized actuarial gains and losses are deferred and recorded in AOCI or, for Transco and NWP, as a regulatory asset or liability, until amortized as a component of net periodic benefit cost (credit). The unrecognized net actuarial gains (losses) deferred in AOCI at December 31, 2024 and 2023 were $55 million and ($17) million, respectively. Unrecognized actuarial gains and losses in excess of 10 percent of the greater of the benefit obligation or the market-related value of plan assets are amortized over the participants’ average remaining future years of service, which is approximately 9 years for Williams’ pension plans and approximately 4 years for Williams’ other postretirement benefit plan.
The expected return on plan assets component of net periodic benefit cost (credit) is calculated using the market-related value of plan assets. For Williams’ pension plans, the market-related value of plan assets is equal to the fair value of plan assets adjusted to reflect the amortization of gains or losses associated with the difference between the expected and actual return on plan assets over a 5-year period. Additionally, the market-related value of assets may be no more than 110 percent or less than 90 percent of the fair value of plan assets at the beginning of the year. The market-related value of plan assets for Williams’ other postretirement benefit plan is equal to the unadjusted fair value of plan assets at the beginning of the year.
Contingent Liabilities
Liabilities for loss contingencies, including environmental matters, are recorded when management assesses that a loss is probable and the amount of the loss can be reasonably estimated. These liabilities are calculated based upon management’s assumptions and estimates with respect to the likelihood or amount of loss and upon advice of legal counsel, engineers, or other third parties regarding the probable outcomes of the matters. These calculations are made without consideration of any potential recovery from third parties. Insurance recoveries or reimbursements from others are recognized when realizable. Revisions to these liabilities are generally reflected in income when new or different facts or information become known or circumstances change that affect the previous assumptions or estimates.
Treasury Stock
Treasury stock purchases are accounted for under the cost method whereby the entire cost of the acquired stock is recorded as Treasury stock, at cost in Williams’ Consolidated Balance Sheet. Gains and losses on the subsequent reissuance of shares are credited or charged to Capital in excess of par value in the Consolidated Balance Sheet using the average cost method.
Cash Flows from Operating Activities
Williams, Transco, and NWP use the indirect method to report cash flows from operating activities, which requires adjustments to net income to reconcile to net cash flows provided by operating activities.
Cash Flows from Revolving Credit Facility and Commercial Paper Program
Proceeds and payments related to borrowings under Williams’ revolving credit facility are reflected in the financing activities in the Consolidated Statement of Cash Flows on a gross basis. Proceeds and payments related to borrowings under Williams’ commercial paper program are reflected in the financing activities in the Consolidated Statement of Cash Flows on a net basis, as the outstanding notes generally have maturity dates less than three months from the date of issuance. (See Note 13 – Debt and Banking Arrangements.)
Accounting Standards Issued But Not Yet Adopted
In December 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2023-09, Income Taxes: Improvements to Income Tax Disclosures, which requires disclosure of specific categories in the rate reconciliation and additional information for reconciling items that meet a quantitative threshold. This ASU is effective for fiscal years beginning after December 15, 2024, and early adoption is permitted. The adoption of ASU 2023-09 is not expected to have a material impact on the financial statements.
In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures, which requires public entities to disclose additional information in the notes to financial statements for certain types of expenses (including purchases of inventory, employee compensation, depreciation, amortization, and depletion) in commonly presented expense captions (such as cost of sales, selling, general & administrative expenses, and research and development). The amendments are effective for annual periods beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027 with early adoption permitted. The impact of this standard is currently being evaluated.
Share Repurchase Program
In September 2021, Williams’ Board of Directors authorized a share repurchase program with a maximum dollar limit of $1.5 billion. Repurchases may be made from time to time in the open market, by block purchases, in privately negotiated transactions, or in such other manner as determined by management. Williams will also determine the timing and amount of any repurchases based on market conditions and other factors. The share repurchase program does not obligate Williams to acquire any particular amount of common stock, and it may be suspended or discontinued at any time. This share repurchase program does not have an expiration date. There were $0 million, $130 million and $9 million of repurchases under the program in 2024, 2023, and 2022, respectively, which are included in the Consolidated Statement of Changes in Equity. Cumulative repurchases to date under the program total $139 million.
Significant Risks and Uncertainties
Management believes that the carrying value of certain of Williams’ property, plant, and equipment and intangible assets, notably certain assets acquired by Williams accounted for as business combinations between 2012 and 2014, may be in excess of current fair value. However, the carrying value of these assets, in management’s judgment, continues to be recoverable. It is reasonably possible that future strategic decisions, including transactions such as monetizing assets or contributing assets to new ventures with third parties, as well as unfavorable changes in expected producer activities, could impact management’s assumptions and ultimately result in impairments of these assets. Such transactions or developments may also indicate that certain Williams’ equity-method investments have experienced other-than-temporary declines in value, which could result in impairment.

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Variable Interest Entities
12 Months Ended

Dec. 31, 2024

Variable Interest Entity Disclosures [Abstract]

Variable Interest Entities [Text Block]
Note 2 – Variable Interest Entities
Consolidated VIEs
As of December 31, 2024, Williams consolidated the following VIEs:
Northeast JV
Williams owns a 65 percent interest in the Northeast JV, a subsidiary that is a VIE due to certain voting rights being disproportionate to the obligation to absorb losses and substantially all of the Northeast JV’s activities being performed on Williams’ behalf. Williams is the primary beneficiary because it has the power to direct the activities that most significantly impact the Northeast JV’s economic performance. The Northeast JV provides midstream services for producers in the Marcellus Shale and Utica Shale regions. Future expansion activity is expected to be funded with capital contributions from Williams and the other equity partner on a proportional basis.
Gulfstar One
Williams owns a 51 percent interest in Gulfstar One, a subsidiary that, due to certain risk-sharing provisions in its customer contracts, is a VIE. Gulfstar One includes a proprietary floating-production system, Gulfstar FPS, and associated pipelines that provide production handling and gathering services in the eastern deepwater Gulf of America. Williams is the primary beneficiary because it has the power to direct the activities that most significantly impact Gulfstar One’s economic performance.
Cardinal
Williams owns a 66 percent interest in Cardinal, a subsidiary that provides gathering services for the Utica Shale region and is a VIE due to certain risks shared with customers. Williams is the primary beneficiary because it has the power to direct the activities that most significantly impact Cardinal’s economic performance. In order to meet contractual gas gathering commitments, Williams may fund more than its proportional share of future expansion activity, which could ultimately impact relative ownership.
The following table presents amounts included in the Consolidated Balance Sheet that are only for the use or obligation of the consolidated VIEs:
December 31,
2024 2023
(Millions)
Assets (liabilities):
Cash and cash equivalents $ 15 $ 33
Trade accounts and other receivables – net 178 215
Inventories 5 5
Other current assets and deferred charges 7 4
Property, plant, and equipment – net 4,896 5,046
Intangible assets – net of accumulated amortization 1,940 2,049
Regulatory assets, deferred charges, and other 27 31
Accounts payable (57) (109)
Other current liabilities
(29) (28)
Regulatory liabilities, deferred income, and other (263) (268)
Nonconsolidated VIEs
Williams owns certain equity-method investments that are VIEs due primarily to its limited participating rights as a minority equity holder. Williams’ maximum exposure to loss is limited to the carrying value of these investments (included within Investments in the Consolidated Balance Sheet), which totaled $72 million at December 31, 2024.

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Acquisitions and Divestitures
12 Months Ended

Dec. 31, 2024

Business Combinations [Abstract]

Acquisitions and Divestitures [Text Block]
Note 3 – Acquisitions and Divestitures
Crowheart Acquisition
As of December 31, 2023, Williams had an agreement regarding certain crude oil and natural gas properties in the Wamsutter basin in Wyoming under which it owned a 75 percent undivided interest in each well’s working interest and proportionally consolidated its undivided interest. On November 1, 2024, Williams closed on the acquisition of a third-party operator, Crowheart Energy, LLC, for $307 million cash, subject to working capital and post-closing adjustments (Crowheart Acquisition). After closing on the acquisition, Williams owns more than a 90 percent working interest in each well. The purpose of this acquisition was to consolidate Williams’ interests in the Wamsutter basin and further optimize development in the area to continue to supply its gathering and processing assets. Assets acquired, acquisition-related costs incurred, and results of operations realized are included at Other.
During the period from the acquisition date of November 1, 2024 to December 31, 2024, the additional interest acquired in the Crowheart Acquisition contributed Revenues of $20 million and Modified EBITDA (as defined in Note 19 – Segment Disclosures) of $7 million.
Williams accounted for the Crowheart Acquisition as a business combination, which requires, among other things, that identifiable assets acquired and liabilities assumed be recognized at their acquisition date fair values.
The following table presents the preliminary allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 1, 2024. The allocation is considered preliminary because the valuation work has not been completed due to the ongoing review of the valuation results and validation of significant inputs and assumptions. Preliminary fair value measurements were made for certain acquired assets and liabilities, primarily property, plant, and equipment, which utilized the income approach for proved developed producing reserves and the market approach for undeveloped reserves; however, adjustments to those measurements may be made in subsequent periods, up to one year from the acquisition date, as new information related to facts and circumstances as of the acquisition date may be identified.
(Millions)
Cash and cash equivalents $ 94
Other current assets
15
Property, plant, and equipment – net 400
Other noncurrent assets
2
Total assets acquired 511
Current liabilities
(45)
Noncurrent liabilities
(115)
Total liabilities assumed (160)
Net assets acquired
$ 351
Discovery Acquisition
As of December 31, 2023, Williams owned a 60 percent interest in Discovery, which it accounted for as an equity-method investment. On August 1, 2024, Williams closed on the acquisition of the remaining 40 percent interest in Discovery, along with certain other assets, for $170 million cash, subject to working capital and post-closing adjustments (Discovery Acquisition). As a result of acquiring this additional interest, Williams obtained control and subsequently consolidates Discovery. The purpose of this acquisition was to expand Williams’ gathering, processing, and transportation presence in the Gulf of America region. Assets acquired, acquisition-related costs incurred, and results of operations realized are included within Williams’ Transmission & Gulf of America segment.
During the period from the acquisition date of August 1, 2024 to December 31, 2024, the operations acquired in the Discovery Acquisition contributed Revenues of $144 million and Modified EBITDA of $42 million.
Acquisition-related costs for the Discovery Acquisition total $1 million and are included in Selling, general, and administrative expenses in the Williams Consolidated Statement of Income.
Williams accounted for the Discovery Acquisition as a business combination. The book value of its existing equity-method investment prior to the acquisition date of August 1, 2024, was $381 million. Williams recognized a $127 million gain on remeasuring its existing equity-method investment to fair value included in Other investing income (loss) – net in the Williams Consolidated Statement of Income during 2024, which is not included in the pro forma Discovery adjustments below. Williams utilized the income approach to fair value its previous equity-method investment in Discovery.
The following table presents the preliminary allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at August 1, 2024. The allocation is considered preliminary because the valuation work has not been completed due to the ongoing review of the valuation results and validation of significant inputs and assumptions. Preliminary fair value measurements were made for certain acquired assets and liabilities, primarily property, plant, and equipment, which utilized the cost approach; however, adjustments to those measurements may be made in subsequent periods, up to one year from the acquisition date, as new information related to facts and circumstances as of the acquisition date may be identified.
(Millions)
Cash and cash equivalents $ 22
Other current assets 19
Property, plant, and equipment – net 941
Other noncurrent assets 39
Total assets acquired
1,021
Current liabilities (40)
Noncurrent liabilities
(296)
Total liabilities assumed (336)
Net assets acquired $ 685
Gulf Coast Storage Acquisition
On January 3, 2024, Williams closed on the acquisition from Hartree Partners LP for $1.95 billion of 100 percent of a strategic portfolio of natural gas storage facilities and pipelines, located in Louisiana and Mississippi (Gulf Coast Storage Acquisition). The purpose of this acquisition was to expand Williams’ natural gas storage footprint in the Gulf Coast region. Assets acquired, acquisition-related costs incurred, and results of operations realized are included within Williams’ Transmission & Gulf of America segment. The Gulf Coast Storage Acquisition was funded with cash on hand and $100 million of deferred consideration that did not accrue interest and was payable one year from the acquisition date. The obligation is presented within Long-term debt due within one year in the Williams Consolidated Balance Sheet as of December 31, 2024, owed by Williams’ wholly owned subsidiary Williams Field Services Group, LLC. On January 3, 2025, Williams paid the remaining $100 million of the Gulf Coast Storage Acquisition purchase price obligation.
During the period from the acquisition date of January 3, 2024 to December 31, 2024, the operations acquired in the Gulf Coast Storage Acquisition contributed Revenues of $228 million and Modified EBITDA of $160 million, which is impacted by acquisition-related costs. Acquisition-related costs for the Gulf Coast Storage Acquisition total $15 million, including $14 million incurred in 2024, and are included in Selling, general, and administrative expenses in the Williams Consolidated Statement of Income.
Williams accounted for the Gulf Coast Storage Acquisition as a business combination. The valuation technique used consisted of the cost approach for property, plant, and equipment.
The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at January 3, 2024.
(Millions)
Cash and cash equivalents $ 46
Other current assets 18
Property, plant, and equipment – net 2,035
Other noncurrent assets 2
Total assets acquired
2,101
Current liabilities (11)
Noncurrent liabilities
(107)
Total liabilities assumed (118)
Net assets acquired $ 1,983
DJ Basin Acquisitions
Cureton Acquisition
On November 30, 2023, Williams closed on the acquisition of 100 percent of Cureton Front Range, LLC (Cureton Acquisition), whose operations are located in the DJ Basin, for $546 million. The purpose of this acquisition was to expand Williams’ gathering and processing footprint and create operational synergies for its operations in the DJ Basin. Assets acquired, acquisition-related costs incurred, and results of operations realized are included within Williams’ West segment. The Cureton Acquisition was funded with cash on hand.
During the period from the acquisition date of November 30, 2023 to December 31, 2023, the operations acquired in the Cureton Acquisition contributed Revenues of $35 million and Modified EBITDA of $7 million.
Acquisition-related costs for the Cureton Acquisition total $8 million, including $6 million incurred in 2023, and are included in Selling, general, and administrative expenses in the Williams Consolidated Statement of Income.
Williams accounted for the Cureton Acquisition as a business combination. The valuation techniques used consisted of the cost approach for property, plant, and equipment and the income approach for valuation of other intangible assets.
The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 30, 2023.
(Millions)
Cash and cash equivalents $ 6
Other current assets 21
Property, plant, and equipment – net 433
Intangible assets – net of accumulated amortization 117
Other noncurrent assets 1
Total identifiable assets acquired 578
Current liabilities (29)
Noncurrent liabilities
(14)
Total liabilities assumed (43)
Net identifiable assets acquired 535
Goodwill included in Intangible assets – net of accumulated amortization
11
Net assets acquired $ 546
Other intangible assets recognized in the Cureton Acquisition are related to contractual customer relationships from gas gathering and processing agreements with customers. The basis for determining the value of these intangible assets is estimated future net cash flows to be derived from acquired contractual customer relationships discounted using a risk-adjusted discount rate. These intangible assets are being amortized on a straight-line basis over an initial period of 20 years which represents the term over which the contractual customer relationships are expected to contribute to Williams’ cash flows. Approximately 24 percent of the expected future revenues from these contractual customer relationships are impacted by Williams’ ability and intent to renew or renegotiate existing customer contracts. Williams expenses costs incurred to renew or extend the terms of its gas gathering contracts with customers. Based on the estimated future revenues during the current contract periods (as estimated at the time of the acquisition), the weighted-average period prior to the next renewal or extension of the existing contractual customer relationships is approximately 10 years. See Note 11 – Goodwill and Other Intangible Assets.
RMM Acquisition
As of December 31, 2022, Williams owned a 50 percent interest in RMM which it accounted for as an equity-method investment. On November 30, 2023, Williams closed on the acquisition of the remaining 50 percent interest in RMM (RMM Acquisition) for $704 million. As a result of acquiring this additional interest, Williams obtained control and subsequently consolidates RMM. The purpose of this acquisition was to expand Williams’ gathering and processing footprint and create operational synergies for its operations in the DJ Basin. Assets acquired and results of operations realized are included within Williams’ West segment. Substantially all of the RMM purchase price was not due to the seller until the first quarter of 2025, would not accrue interest until November 2, 2024, and could be repaid early without penalty. It was recorded as a deferred consideration obligation at fair value using an income approach, which resulted in a discount to the contractual amount due which was imputed as interest expense over the term of the obligation. On November 1, 2024, Williams paid the remaining $651 million of the RMM purchase price obligation.
During the period from the acquisition date of November 30, 2023 to December 31, 2023, RMM contributed Revenues of $53 million and Modified EBITDA of $12 million.
Williams accounted for the RMM Acquisition as a business combination. The book value of Williams’ existing equity-method investment prior to the acquisition date of November 30, 2023, was $406 million. Williams recognized a $30 million gain on remeasuring its existing equity-method investment to fair value included in Other investing income (loss) – net in the Williams Consolidated Statement of Income during the fourth quarter of 2023,
which is not included in the pro forma DJ Basin adjustments below. The valuation techniques used consisted of the income approach for Williams’ previous equity-method investment in RMM and the valuation of other intangible assets, and the cost approach for property, plant, and equipment.
The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 30, 2023. The net assets acquired primarily reflect the noncash consideration transferred, which includes the fair value of both Williams’ previous equity-method investment and the deferred consideration obligation.

(Millions)
Cash and cash equivalents $ 28
Other current assets 4
Investments 20
Property, plant, and equipment – net 1,041
Intangible assets – net of accumulated amortization 63
Other noncurrent assets 12
Total identifiable assets acquired 1,168
Current liabilities (44)
Noncurrent liabilities
(103)
Total liabilities assumed (147)
Net identifiable assets acquired 1,021
Goodwill included in Intangible assets – net of accumulated amortization
55
Net assets acquired $ 1,076
Goodwill recognized in the RMM Acquisition relates primarily to enhancing and diversifying Williams’ basin positions as well as delivering operational synergies, including increasing volumes on its existing processing facilities and increasing revenues on its NGL transportation, fractionation, and storage assets, and is reported within Williams’ West segment. Substantially all of the goodwill is deductible for tax purposes.
Other intangible assets recognized in the RMM Acquisition are related to contractual customer relationships from gas gathering and processing agreements with customers. The basis for determining the value of these intangible assets is estimated future net cash flows to be derived from acquired contractual customer relationships discounted using a risk-adjusted discount rate. These intangible assets are being amortized on a straight-line basis over an initial period of 20 years which represents the term over which the contractual customer relationships are expected to contribute to Williams’ cash flows. Approximately 18 percent of the expected future revenues from these contractual customer relationships are impacted by Williams’ ability and intent to renew or renegotiate existing customer contracts. Williams expenses costs incurred to renew or extend the terms of its gas gathering contracts with customers. Based on the estimated future revenues during the current contract periods (as estimated at the time of the acquisition), the weighted-average period prior to the next renewal or extension of the existing contractual customer relationships is approximately 10 years. See Note 11 – Goodwill and Other Intangible Assets.
MountainWest Acquisition
On February 14, 2023, Williams closed on the acquisition of 100 percent of MountainWest, which includes FERC-regulated interstate natural gas pipeline systems and natural gas storage capacity (MountainWest Acquisition), for $1.08 billion of cash, funded with available sources of short-term liquidity, and retaining $430 million outstanding principal amount of MountainWest long-term debt. For 2023, $1.024 billion is presented in Purchases of businesses, net of cash acquired in the Williams Consolidated Statement of Cash Flows reflecting the cash purchase price, reduced for post-closing adjustments and the cash acquired as presented in the purchase price
allocation. The purpose of the MountainWest Acquisition was to expand Williams’ existing transmission and storage infrastructure footprint into major markets in Utah, Wyoming, and Colorado. Assets acquired, acquisition-related costs incurred, and results of operations realized are included within Williams’ Transmission & Gulf of America segment.
During the period from the acquisition date of February 14, 2023 to December 31, 2023, the operations acquired in the MountainWest Acquisition contributed Revenues of $225 million and Modified EBITDA of $122 million, which includes $27 million of transition-related costs.
Acquisition-related costs for the MountainWest Acquisition total $18 million, including $16 million incurred in 2023, and are included in Selling, general, and administrative expenses in the Williams Consolidated Statement of Income.
Williams accounted for the MountainWest Acquisition as a business combination. The valuation techniques used consisted of the cost approach for nonregulated property, plant, and equipment, as well as the market approach for the assumed long-term debt consistent with the valuation technique discussed in Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk. MountainWest’s regulated operations are accounted for pursuant to ASC 980. The fair value of assets and liabilities subject to rate making and cost recovery provisions were determined utilizing the income approach. MountainWest’s expected return on rate base is consistent with expected returns of similarly situated assets, resulting in carryover basis of these assets and liabilities equaling their fair value.
The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at February 14, 2023. The fair value of accounts receivable acquired equals contractual amounts receivable.
(Millions)
Cash and cash equivalents $ 23
Trade accounts and other receivables 33
Other current assets 26
Investments 20
Property, plant, and equipment – net 1,019
Other noncurrent assets 33
Total identifiable assets acquired 1,154
Current liabilities (47)
Long-term debt (365)
Other noncurrent liabilities (95)
Total liabilities assumed (507)
Net identifiable assets acquired 647
Goodwill included in Intangible assets – net of accumulated amortization
400
Net assets acquired $ 1,047
Goodwill recognized in the MountainWest Acquisition relates primarily to enhancing and diversifying Williams’ basin positions and the long-term value associated with rate regulated businesses and is reported within its Transmission & Gulf of America segment. Substantially all of the goodwill is deductible for tax purposes.
Trace Acquisition
On April 29, 2022, Williams closed on the acquisition of 100 percent of Gemini Arklatex, LLC through which it acquired the Haynesville Shale region gas gathering and related assets of Trace Midstream for $972 million of cash
funded with cash on hand and proceeds from issuance of commercial paper (Trace Acquisition). The purpose of the Trace Acquisition was to expand Williams’ footprint into the east Texas area of the Haynesville Shale region, increasing in-basin scale in one of the largest growth basins in the country. Assets acquired, acquisition-related costs incurred, and results of operations realized are included within Williams’ West segment.
During the period from the acquisition date of April 29, 2022 to December 31, 2022, the operations acquired in the Trace Acquisition contributed Revenues of $148 million and Modified EBITDA of $73 million.
Acquisition-related costs for the Trace Acquisition of $8 million were included in Selling, general, and administrative expenses in the Williams Consolidated Statement of Income during 2022.
Williams accounted for the Trace Acquisition as a business combination. The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at April 29, 2022. The valuation techniques used consisted of the income approach for valuation of intangible assets and the cost approach for property, plant, and equipment.
(Millions)
Cash and cash equivalents $ 39
Trade accounts and other receivables
18
Property, plant, and equipment – net 448
Intangible assets – net of accumulated amortization 472
Other noncurrent assets 20
Total assets acquired 997
Accounts payable (12)
Other current liabilities (5)
Other noncurrent liabilities (8)
Total liabilities assumed (25)
Net assets acquired $ 972
Other intangible assets recognized in the Trace Acquisition are related to contractual customer relationships from gas gathering agreements with customers. The basis for determining the value of these intangible assets is estimated future net cash flows to be derived from acquired contractual customer relationships discounted using a risk-adjusted discount rate. These intangible assets are being amortized on a straight-line basis over an initial period of 20 years which represents the term over which the contractual customer relationships are expected to contribute to Williams’ cash flows. Approximately 2 percent of the expected future revenues from these contractual customer relationships are impacted by Williams’ ability and intent to renew or renegotiate existing customer contracts. Williams expenses costs incurred to renew or extend the terms of its gas gathering contracts with customers. Based on the estimated future revenues during the current contract periods (as estimated at the time of the acquisition), the weighted-average period prior to the next renewal or extension of the existing contractual customer relationships is approximately 19 years. See Note 11 – Goodwill and Other Intangible Assets.
Supplemental Pro Forma
The following pro forma Revenues and Net income (loss) attributable to The Williams Companies, Inc. for 2024, 2023, and 2022, are presented as if the Crowheart Acquisition, Discovery Acquisition, and Gulf Coast Storage Acquisition had been completed on January 1, 2023, the DJ Basin Acquisitions and MountainWest Acquisition had been completed on January 1, 2022, and the Trace Acquisition had been completed on January 1, 2021. These pro forma amounts are not necessarily indicative of what the actual results would have been if the acquisitions had in fact occurred on the dates or for the periods indicated, nor do they purport to project Revenues or Net income (loss) attributable to The Williams Companies, Inc. for any future periods or as of any date. These amounts do not give
effect to any potential cost savings, operating synergies, or revenue enhancements to result from the transactions or the potential costs to achieve these cost savings, operating synergies, and revenue enhancements.
Year Ended December 31, 2024
As Reported
Pro Forma Crowheart (1)
Pro Forma Discovery (1)
Pro Forma Combined
(Millions)
Revenues $ 10,503 $ 60 $ 58 $ 10,621
Net income (loss) attributable to The Williams Companies, Inc. 2,225 8 (5) 2,228
Year Ended December 31, 2023
As Reported
Pro Forma Crowheart
Pro Forma Discovery
Pro Forma Gulf Coast Storage
Pro Forma DJ Basin (1)
Pro Forma MountainWest (1)
Pro Forma Combined
(Millions)
Revenues $ 10,907 $ 74 $ 129 $ 202 $ 270 $ 35 $ 11,617
Net income (loss) attributable to The Williams Companies, Inc. 3,179 19 (1) 53 17 6 3,273
Year Ended December 31, 2022
As Reported
Pro Forma DJ Basin
Pro Forma MountainWest
Pro Forma Trace (1)
Pro Forma Combined
(Millions)
Revenues $ 10,965 $ 218 $ 265 $ 45 $ 11,493
Net income (loss) attributable to The Williams Companies, Inc. 2,049 13 170 18 2,250
(1)Excludes results from operations acquired in the acquisition for the period beginning on the acquisition date, as these results are included in the amounts as reported.
NorTex Asset Purchase
On August 31, 2022, Williams purchased a group of assets in north Texas, primarily natural gas storage facilities and pipelines, from NorTex Midstream Holdings, LLC (NorTex Asset Purchase) for approximately $424 million. These assets are included in Williams’ Transmission & Gulf of America segment.
Sale of Certain Gulf Coast Liquids Pipelines
On September 29, 2023, Williams completed the sale of various petrochemical and feedstock pipelines and associated contracts in the Gulf Coast region for $348 million. As a result of this sale, Williams recorded a gain of $129 million in 2023 in its Transmission & Gulf of America segment. The gain is reflected in Gain on sale of business in the Williams Consolidated Statement of Income. The results of operations for this disposal group, excluding the gain noted, were not significant for the reporting periods.

v3.25.0.1

Related Party Transactions
12 Months Ended

Dec. 31, 2024

Related Party Transactions [Abstract]

Related Party Transactions [Text Block]
Note 4 – Related Party Transactions
Williams
Transactions with Equity-Method Investees
Williams has costs and expenses associated with its equity-method investees of $266 million, $776 million, and $1.3 billion for 2024, 2023, and 2022, respectively in its Consolidated Statement of Income. Substantially all of
these expenses are included in Product costs. Williams also has revenue from its equity-method investees of $2 million, $5 million, and $76 million for 2024, 2023, and 2022, respectively. In addition, Williams has $1 million and $2 million included in Trade accounts and other receivables and $19 million and $33 million included in Accounts payable in its Consolidated Balance Sheet with its equity-method investees at December 31, 2024 and 2023, respectively.
Williams has operating agreements with certain equity-method investees. These operating agreements typically provide for reimbursement or payment to Williams for certain direct operational payroll and employee benefit costs, materials, supplies, and other charges and also for management services. The total charges to equity-method investees for these fees are $52 million, $64 million, and $65 million for 2024, 2023, and 2022, respectively.
Board of Directors
Two members of Williams’ Board of Directors are also executive officers at certain of its counterparties. Williams recorded $59 million, $90 million, and $180 million in Product sales and $40 million, $25 million, and $86 million in Product costs in its Consolidated Statement of Income from these companies for the purchase and sale of natural gas for 2024, 2023, and 2022, respectively.
Transco and NWP Affiliate Transactions
Benefit Plans
Transco and NWP do not have employees. Certain of the costs charged to them by Williams associated with employees who directly support them are described below. Additionally, allocated corporate expenses from Williams also include amounts related to these same employee benefits, which are not included in the amounts presented immediately below.
Pension and Other Postretirement Benefit Plans

Williams’ pension and other postretirement benefit plans are single-employer plans. However, Transco and NWP follow multiemployer plan accounting whereby the amount charged to them and thus paid by them, is based on their share of net periodic benefit cost (see Note 7 – Employee Benefit Plans).

Pension costs charged to Transco by Williams were $1 million, $2 million, and $4 million for 2024, 2023, and 2022, respectively. NWP received pension credits from Williams of $1 million in 2024, $0 million in 2023, and pension charges of $1 million in 2022.

Williams makes annual cash contributions to the pension plans, based on annual actuarial estimates, which Transco recovers through rates that are set through periodic general rate filings. Effective with Transco’s Docket No. RP18-1126 rate case settlement, any amounts of annual contributions that fall below a threshold are recorded as adjustments to income and refunded through future rate adjustments. The amounts of deferred pension collections recorded as regulatory liabilities at December 31, 2024 and 2023 were $30 million and $26 million, respectively. Also effective with Transco’s Docket No. RP18-1126 rate case settlement, the pension regulatory liability as of March 1, 2019 was amortized over a five-year period, and the amortization was completed in February 2024.

Transco recognized other postretirement benefit income of $8 million, $6 million, and $5 million for 2024, 2023, and 2022, respectively, while NWP recognized other postretirement benefit income of $1 million, $0 million, and $1 million, respectively for the same periods. These credits were recorded as regulatory liabilities.

Transco and NWP have been allowed by rate case settlements to collect or refund in future rates any differences between the actuarially determined costs and amounts currently being recovered in rates related to other postretirement benefits. Any differences between the annual actuarially determined cost and amounts currently being recovered in rates are recorded as regulatory assets or liabilities and collected or refunded through future rate
adjustments. The amounts of other postretirement benefits costs deferred as regulatory liabilities at December 31, 2024 and 2023 are $31 million and $31 million, for Transco respectively, and $43 million and $42 million, for NWP respectively. Effective with the Docket No. RP18-1126 rate case settlement, Transco’s other postretirement benefits regulatory liability as of March 1, 2019 was amortized over a period of approximately five years, and the amortization was completed in July 2024.

Defined Contribution Plan

Williams maintains a defined contribution plan for substantially all of its employees. Williams charged Transco compensation expense of $13 million, $12 million, and $11 million in 2024, 2023, and 2022, respectively, and charged NWP compensation expense of $3 million, $3 million, and $3 million in 2024, 2023, and 2022, respectively, for Williams’ company contributions to this plan.

Employee Stock-Based Compensation Plan Information (see Note 15 – Equity-Based Compensation)

Williams currently bills Transco and NWP directly for compensation expense related to stock-based compensation awards based on the fair value of the awards. Transco and NWP are also billed for their proportionate share of Williams’ and other affiliates’ stock-based compensation expense through various allocation processes.

Total stock-based compensation expense for the years ended December 31, 2024, 2023, and 2022 was $6 million, $6 million, and $6 million, for Transco respectively, and $2 million, $2 million, and $1 million, for NWP respectively.

Cash Management Program
Transco and NWP are participants in Williams’ cash management program, and thus make advances to and receive advances from Williams. At December 31, 2024 and 2023, Transco’s advances to Williams totaled approximately $638 million and $1.4 billion, respectively. These advances are represented by demand notes and are classified as Trade accounts and other receivables - Advances to affiliate in the Balance Sheet. NWP’s advances from Williams totaled approximately $26 million at December 31, 2024. These advances from Williams are classified as Payables - Advances from affiliate. Advances to Williams from NWP totaled approximately $158 million at December 31, 2023. These advances are represented by demand notes and are classified as Trade accounts and other receivables - Advances to affiliate in the Balance Sheet. Advances are stated at the historical carrying amounts. Interest expense and income are recognized when earned and the collectability is reasonably assured. The interest rate on these intercompany demand notes is based upon the daily overnight investment rate paid on Williams’ excess cash at the end of each month, which was approximately 4 percent at December 31, 2024. The net interest income from these advances was $51 million, $81 million, and $31 million during years ended December 31, 2024, 2023, and 2022, for Transco respectively, and $5 million, $8 million, and $5 million for the years ended December 31, 2024, 2023, and 2022 for NWP respectively. Such interest income is included in Interest income in the Statement of Net Income for Transco and Other income (expense) – net in the Statement of Net Income for NWP.

Other Affiliate Transactions

Included in Transco’s Total revenues in the Statement of Net Income for 2024, 2023, and 2022 are revenues received from affiliates of $76 million, $56 million, and $89 million, respectively.

Included in Transco’s Natural gas product costs in the Statement of Net Income for 2024, 2023, and 2022 are costs of gas purchased from affiliates of $5 million, $7 million, and $18 million, respectively. All gas purchases are made at market or contract prices.
Services necessary to operate Transco and NWP are provided by Williams and certain affiliates of Williams. Transco and NWP reimburse Williams and its affiliates for all direct and indirect expenses incurred or payments made (including salary, bonus, incentive compensation, and benefits) in connection with these services. Employees of Williams also provide general, administrative, and management services, and Transco and NWP are charged for certain administrative expenses incurred by Williams. These charges are either directly assigned or allocated. Allocated charges are specific or general. Specific allocations are based on a relationship with the delivery of services and general allocations are based on a three-factor formula, which considers revenues; property, plant, and equipment; and payroll. In management’s estimation, the allocation methodologies used are reasonable and result in a reasonable allocation of costs of doing business incurred by Williams. For the years ended December 31, 2024, 2023, and 2022, Transco has recorded $344 million, $324 million, and $345 million, respectively, and NWP has recorded $91 million, $86 million, and $88 million, respectively, for these service expenses, which are primarily included in Operating and maintenance expenses and Selling, general, and administrative expenses in the Statement of Net Income.

Transco provides services to certain of its affiliates. Transco recorded reductions in operating expenses for services provided to and reimbursed by affiliates of $6 million, $14 million, and $10 million for the years ended December 31, 2024, 2023, and 2022, respectively.

During January 2025, Transco and NWP declared and paid cash distributions of $246 million and $24 million, respectively, to Williams, and Williams made a cash contribution to NWP of $85 million.

v3.25.0.1

Revenue Recognition
12 Months Ended

Dec. 31, 2024

Revenue Recognition [Abstract]

Revenue Recognition [Text Block]
Note 5 – Revenue Recognition
Revenue by Category
The following table presents Williams’ revenue disaggregated by major service line:
Transmission & Gulf of America Northeast G&P West Gas & NGL Marketing Services Other Eliminations Total
(Millions)
2024
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage $ 3,500 $ — $ — $ — $ — $ (81) $ 3,419
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration 661 1,778 1,693 — — (162) 3,970
Commodity consideration 54 2 78 — — — 134
Other 46 92 21 — — (19) 140
Total service revenues 4,261 1,872 1,792 — — (262) 7,663
Product sales 328 110 869 4,530 420 (1,288) 4,969
Total revenues from contracts with customers 4,589 1,982 2,661 4,530 420 (1,550) 12,632
Other revenues (1) 39 43 8 2,236 24 (2) 2,348
Other adjustments (2) — — — (4,977) — 500 (4,477)
Total revenues $ 4,628 $ 2,025 $ 2,669 $ 1,789 $ 444 $ (1,052) $ 10,503
2023
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage $ 3,334 $ — $ — $ — $ — $ (60) $ 3,274
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration
443 1,782 1,478 — — (170) 3,533
Commodity consideration 38 5 103 — — — 146
Other
30 87 12 1 — (15) 115
Total service revenues 3,845 1,874 1,593 1 — (245) 7,068
Product sales 252 132 441 4,615 442 (954) 4,928
Total revenues from contracts with customers 4,097 2,006 2,034 4,616 442 (1,199) 11,996
Other revenues (1) 53 27 101 4,294 64 (2) 4,537
Other adjustments (2) — — — (6,032) — 406 (5,626)
Total revenues $ 4,150 $ 2,033 $ 2,135 $ 2,878 $ 506 $ (795) $ 10,907
Transmission & Gulf of America Northeast G&P West Gas & NGL Marketing Services Other Eliminations Total
(Millions)
2022
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage $ 3,139 $ — $ — $ — $ — $ (72) $ 3,067
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration
381 1,526 1,518 — — (167) 3,258
Commodity consideration 64 14 182 — — — 260
Other
21 102 12 3 — (16) 122
Total service revenues 3,605 1,642 1,712 3 — (255) 6,707
Product sales 404 134 841 10,768 706 (1,787) 11,066
Total revenues from contracts with customers 4,009 1,776 2,553 10,771 706 (2,042) 17,773
Other revenues (1) 38 26 8 7,929 (55) (11) 7,935
Other adjustments (2) — — — (15,467) — 724 (14,743)
Total revenues $ 4,047 $ 1,802 $ 2,561 $ 3,233 $ 651 $ (1,329) $ 10,965
______________________________
(1)Revenues not derived from contracts with customers primarily consist of physical product sales related to commodity derivative contracts, realized and unrealized gains and losses associated with Williams’ commodity derivative contracts, which are reported in Net gain (loss) from commodity derivatives in the Consolidated Statement of Income, management fees received for certain services provided to operated equity-method investments, and leasing revenues associated with the Williams headquarters building.
(2)Other adjustments reflect certain costs of Gas & NGL Marketing Services’ risk management activities. As Williams is acting as agent for natural gas marketing customers or engages in energy trading activities, the resulting revenues are presented net of the related costs of those activities in the Consolidated Statement of Income.

For Transco and NWP, revenue disaggregation by major service line includes Natural gas transportation, Natural gas storage, Natural gas product sales, and Other, which are separately presented on their Statements of Net Income.
Contract Assets
The following tables present a reconciliation of contract assets:
Williams
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 36 $ 29
Revenue recognized in excess of amounts invoiced 170 183
Minimum volume commitments invoiced (144) (176)
Contract assets acquired 36 —
Balance at end of year $ 98 $ 36
Transco
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ — $ —
Revenue recognized in excess of amounts invoiced 10 —
Balance at end of year $ 10 $ —

NWP
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 17 $ 13
Revenue recognized in excess of amounts invoiced 6 6
Amortization of contract assets (2) (2)
Balance at end of year $ 21 $ 17

Contract Liabilities
The following tables present a reconciliation of contract liabilities:
Williams
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 1,081 $ 1,043
Payments received and deferred 183 190
Significant financing component 8 9
Contract liability acquired (disposed) – net 53 115
Recognized in revenue (279) (276)
Balance at end of year $ 1,046 $ 1,081
Transco
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 184 $ 194
Recognized in revenue (11) (10)
Balance at end of year $ 173 $ 184
NWP
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 2 $ 3
Recognized in revenue (2) (1)
Balance at end of year $ — $ 2
Remaining Performance Obligations
Remaining performance obligations primarily include reservation charges on contracted capacity for Williams’ gas pipeline firm transportation contracts with customers, storage capacity contracts, long-term contracts containing MVC associated with midstream businesses, and fixed payments associated with offshore production handling. For Williams’ interstate natural gas pipeline businesses, including Transco and NWP, remaining performance obligations reflect the rates for such services in its current effective FERC tariffs for the life of the related contracts; however, these rates may change based on future tariffs approved by the FERC and the amount and timing of these changes are not currently known.
Remaining performance obligations exclude variable consideration, including contracts with variable consideration for which it has elected the practical expedient for consideration recognized in revenue as billed. Certain of its contracts contain evergreen and other renewal provisions for periods beyond the initial term of the contract. The remaining performance obligation amounts as of December 31, 2024, do not consider potential future performance obligations for which the renewal has not been exercised and exclude contracts with customers for which the underlying facilities have not received FERC authorization to be placed into service. Consideration received prior to December 31, 2024, that will be recognized in future periods is also excluded from its remaining performance obligations and is instead reflected in contract liabilities.
The following tables present the amount of the contract liabilities balance expected to be recognized as revenue when performance obligations are satisfied and the transaction price allocated to the remaining performance obligations under certain contracts as of December 31, 2024.

Williams
Contract Liabilities Remaining Performance Obligations
(Millions)
2025 (one year)
$ 173 $ 4,132
2026 (one year)
146 3,860
2027 (one year)
141 3,623
2028 (one year)
118 2,778
2029 (one year)
100 2,564
Thereafter
368 14,102
   Total $ 1,046 $ 31,059
Transco
Contract Liabilities Remaining Performance Obligations
(Millions)
2025 (one year)
$ 10 $ 2,726
2026 (one year)
10 2,536
2027 (one year)
11 2,438
2028 (one year)
11 1,784
2029 (one year)
11 1,693
Thereafter
120 10,421
   Total $ 173 $ 21,598

NWP
Contract Liabilities Remaining Performance Obligations
(Millions)
2025 (one year)
$ — $ 391
2026 (one year)
— 386
2027 (one year)
— 373
2028 (one year)
— 368
2029 (one year)
— 349
Thereafter
— 2,234
   Total $ — $ 4,101

v3.25.0.1

Provision (Benefit) for Income Taxes
12 Months Ended

Dec. 31, 2024

Income Tax Disclosure [Abstract]

Provision (Benefit) for Income Taxes [Text Block]
Note 6 – Provision (Benefit) for Income Taxes
The Provision (benefit) for income taxes from continuing operations includes:
Year Ended December 31,
2024 2023 2022
(Millions)
Current:
Federal $ 125 $ 3 $ (25)
State 9 21 19
134 24 (6)
Deferred:
Federal 472 872 424
State 34 109 7
506 981 431
Provision (benefit) for income taxes $ 640 $ 1,005 $ 425
Reconciliations from the Provision (benefit) at statutory rate from continuing operations to recorded Provision (benefit) for income taxes are as follows:
Year Ended December 31,
2024 2023 2022
(Millions)
Provision (benefit) at statutory rate $ 627 $ 925 $ 534
Increases (decreases) in taxes resulting from:
State income taxes (net of federal benefit)
79 129 113
State deferred income tax rate change (44) (25) (92)
Federal valuation allowance
— — (70)
Federal settlements — — (45)
Impact of nontaxable noncontrolling interests
(25) (26) (14)
Other – net
3 2 (1)
Provision (benefit) for income taxes $ 640 $ 1,005 $ 425
The State deferred income tax rate change benefit of $44 million, $25 million and $92 million in 2024, 2023 and 2022, respectively, is related to a decrease in Williams’ estimate of the deferred state income tax rate (net of federal effect). The 2024 benefit is driven primarily by a decrease in the Louisiana state income tax rate and the enacted decline in the Pennsylvania state income tax rate over the next several years.
During the course of audits of its business by domestic and foreign tax authorities, Williams frequently faces challenges regarding the amount of taxes due. These challenges include questions regarding the timing and amount of deductions and the allocation of income among various tax jurisdictions. In evaluating the liability associated with its various filing positions, Williams applies the two-step process of recognition and measurement. In association with this liability, Williams records an estimate of related interest and tax exposure as a component of its tax provision. The impact of this accrual is included within Other – net in its reconciliation of the Provision (benefit) at statutory rate to recorded Provision (benefit) for income taxes.
Significant components of Deferred income tax liabilities are as follows:
December 31,
2024 2023
(Millions)
Gross deferred income tax liabilities:
Property, plant and equipment
$ 4,501 $ 3,541
Investments
1,733 1,740
Other
193 146
Total gross deferred income tax liabilities 6,427 5,427
Gross deferred income tax assets:
Accrued liabilities
1,146 868
Corporate alternative minimum tax credits
108 —
Foreign tax credits — 35
Federal loss carryovers
325 398
Disallowed business interest expense carryforward
247 67
State losses and credits
224 293
Other
92 103
Total gross deferred income tax assets 2,142 1,764
Less valuation allowance 91 183
Net deferred income tax assets 2,051 1,581
Deferred income tax liabilities $ 4,376 $ 3,846
The valuation allowance at December 31, 2024 and 2023 serves to reduce the available deferred income tax assets to an amount that will, more likely than not, be realized. Williams considered all available positive and negative evidence, which incorporates available tax planning strategies, and management’s estimate of future reversals of existing taxable temporary differences and has determined that a portion of its deferred income tax assets related to State losses and credits may not be realized. The change from prior year for the Foreign tax credits reflects a decrease of $35 million due to its expiration in 2024. The amounts presented in the table above are, with respect to state items, before any federal benefit. The change from prior year for the State losses and credits reflects increases in losses and credits generated in the current and prior years less losses and/or credits utilized in the current year. Williams has loss and credit carryovers in multiple state taxing jurisdictions. These attributes generally expire between 2025 and 2043 with some carryovers having indefinite carryforward periods.
Federal loss carryovers at December 31, 2024 reflect deferred tax assets on net operating loss carryovers with no expiration date.
Disallowed business interest expense carryforward reflects Williams’ federal interest expense carryforward which has no expiration date.
Cash payments for income taxes (net of refunds) were $68 million, $31 million and $13 million in 2024, 2023 and 2022 respectively.
During the second quarter of 2022, Williams finalized settlements for 2011 through 2014 on certain contested matters with the Internal Revenue Service (IRS) that resulted in a 2022 year-to-date tax benefit of approximately $45 million and Williams received cash refunds totaling $7 million. During the fourth quarter of 2023, Williams closed the audit for 2018 and made a $5 million payment.
Williams recognizes related interest and penalties as a component of Provision (benefit) for income taxes. There were no significant interest and penalties recognized for any period presented. There were no interest or penalties relating to uncertain tax positions accrued as of December 31, 2024 and December 31, 2023.
Consolidated U.S. Federal income tax returns are open to IRS examination for tax years after 2020. The statute of limitations for most states expires one year after expiration of the IRS statute.

v3.25.0.1

Employee Benefit Plans
12 Months Ended

Dec. 31, 2024

Retirement Benefits [Abstract]

Employee Benefit Plans [Text Block]
Note 7 – Employee Benefit Plans
Pension Plans
Williams has noncontributory defined benefit pension plans for eligible employees hired prior to January 1, 2019. Eligible employees earn compensation credits based on a cash balance formula. As of January 1, 2020, certain active employees are no longer eligible to receive compensation credits.
Other Postretirement Benefits
Williams provides subsidized retiree medical benefits to a closed group of participants as well as retiree life insurance benefits to eligible participants. Medical benefits for Medicare eligible participants are paid through contributions to health reimbursement accounts. Benefits for all other participants are provided through a self-insured medical plan, which includes participant contributions and contains other cost-sharing features such as deductibles, co-payments, and co-insurance.
Defined Contribution Plan
Williams has a defined contribution plan for the benefit of substantially all employees. Plan participants may contribute a portion of their compensation on a pre-tax or after-tax basis. Generally, Williams matches employee contributions up to 6 percent of eligible compensation. Additionally, eligible active employees that do not receive compensation credits under the defined benefit pension plan are eligible for an additional annual fixed-percentage contribution made by Williams to the defined contribution plan. Williams’ contributions charged to expense were $69 million in 2024, $60 million in 2023, and $53 million in 2022.
Funded Status
The following table presents the changes in benefit obligations and plan assets for pension benefits and other postretirement benefits for the years indicated:
Pension Benefits Other
Postretirement Benefits
2024 2023 2024 2023
(Millions)
Change in benefit obligation:
Benefit obligation at beginning of year
$ 1,006 $ 940 $ 145 $ 152
Service cost
25 23 1 1
Interest cost
47 46 7 7
Plan participants’ contributions
— — 2 2
Benefits paid
(73) (71) (11) (13)
Net actuarial loss (gain) (1) (65) 68 (12) (4)
Settlements
(3) — — —
Net increase (decrease) in benefit obligation (69) 66 (13) (7)
Benefit obligation at end of year
937 1,006 132 145
Change in plan assets:
Fair value of plan assets at beginning of year
1,167 1,117 262 253
Actual return on plan assets
88 120 16 17
Employer contributions
4 1 3 3
Plan participants’ contributions
— — 2 2
Benefits paid
(73) (71) (11) (13)
Settlements
(3) — — —
Net increase (decrease) in fair value of plan assets 16 50 10 9
Fair value of plan assets at end of year
1,183 1,167 272 262
Funded status — overfunded (underfunded) $ 246 $ 161 $ 140 $ 117
Amounts recognized in the Consolidated Balance Sheet:
Noncurrent assets $ 270 $ 187 $ 143 $ 120
Current liabilities (4) (4) (3) (3)
Noncurrent liabilities (20) (22) — —
Funded status — overfunded (underfunded) $ 246 $ 161 $ 140 $ 117
Accumulated benefit obligation $ 929 $ 998
____________
(1)    2024 amounts are due primarily to changes in the following factors: Pension Benefits - discount rate assumptions and interest crediting rate assumption; Other Postretirement Benefits - discount rate assumption. 2023 amounts are due primarily to changes in the following factors: Pension Benefits - interest crediting rate assumption and discount rate assumptions.
The following table summarizes information for pension plans with obligations in excess of plan assets at December 31.
2024 2023
(Millions)
Projected benefit obligation $ 23 $ 26
Accumulated benefit obligation 22 24
Fair value of plan assets — —
Pre-tax amounts recognized in Accumulated other comprehensive income (loss) at December 31 are as follows:
Pension Benefits Other
Postretirement Benefits
2024 2023 2024 2023
(Millions)
Net actuarial gain (loss) $ 49 $ (45) $ 20 $ 19
Additionally, as of December 31, 2024 and 2023, Williams has $139 million and $123 million, respectively, of pension and other postretirement plan amounts included in regulatory liabilities associated with its gas pipeline companies.
Net Periodic Benefit Cost (Credit)
Net periodic benefit cost (credit) for the years ended December 31 consist of the following:
Pension Benefits Other
Postretirement Benefits
2024 2023 2022 2024 2023 2022
(Millions)
Components of net periodic benefit cost (credit):
Service cost
$ 25 $ 23 $ 28 $ 1 $ 1 $ 1
Interest cost
47 46 31 7 7 6
Expected return on plan assets
(60) (57) (44) (11) (10) (10)
Amortization of net actuarial loss (gain)
— 5 12 (5) (3) —
Net actuarial loss from settlements
1 — 3 — — —
Reclassification to regulatory liability
— — — — — 1
Net periodic benefit cost (credit) (1) $ 13 $ 17 $ 30 $ (8) $ (5) $ (2)
____________
(1)    Components other than Service cost are included in Other income (expense) – net below Operating income (loss) in Williams’ Consolidated Statement of Income.
Items Recognized in Other Comprehensive Income (Loss)
Other changes in plan assets and benefit obligations recognized in Other comprehensive income (loss) before taxes for the years ended December 31 consist of the following:
Pension Benefits Other
Postretirement Benefits
2024 2023 2022 2024 2023 2022
(Millions)
Net actuarial gain (loss) arising during the year $ 93 $ (5) $ (14) $ 3 $ 3 $ 14
Amortization of net actuarial loss (gain)
— 5 12 (2) (2) —
Net actuarial loss from settlements 1 — 3 — — —
Total recognized in Other comprehensive income (loss)
$ 94 $ — $ 1 $ 1 $ 1 $ 14
Key Assumptions
The weighted-average assumptions utilized to determine benefit obligations and Net periodic benefit cost (credit) as of December 31 are as follows:
Pension Benefits Other
Postretirement Benefits
2024 2023 2022 2024 2023 2022
Benefit obligations:
Discount rate 5.60 % 4.98 % 5.16 % 5.67 % 5.01 % 5.20 %
Rate of compensation increase 3.48 3.52 3.58 N/A N/A N/A
Cash balance interest crediting rate 4.00 4.50 3.50 N/A N/A N/A
Net periodic benefit cost (credit):
Discount rate 4.98 % 5.16 % 2.84 % 5.01 % 5.20 % 2.93 %
Expected long-term rate of return on plan assets 5.31 5.17 3.81 4.16 4.04 3.67
Rate of compensation increase 3.52 3.58 3.67 N/A N/A N/A
Cash balance interest crediting rate 4.50 3.50 3.00 N/A N/A N/A
Williams uses mortality tables issued by the Society of Actuaries to measure the benefit obligations.
The assumed health care cost trend rate for 2025 is 9.2 percent. This rate decreases to 4.5 percent by 2034.
Plan Assets
The plans’ investment objectives include a framework to manage the volatility of the plans’ funded status and minimize future cash contributions. The plans follow a policy of diversifying the investments across various asset classes, strategies, and investment managers. In order to mitigate risks associated with investing, the investment policy for the pension plans defines target asset allocation percentages and outlines types of investments that are authorized and not authorized under the policy. The December 31, 2024, target asset allocation was 25 percent equity securities and 75 percent fixed income securities, including investments in equity and fixed income commingled investment funds and separate accounts.
The fair values of Williams’ pension and other postretirement benefits plan assets by asset class at December 31 are as follows:
2024
Pension Benefits Other Postretirement Benefits

Level 1 (1) Level 2 (2) Total Level 1 (1) Level 2 (2) Total
(Millions)
Cash management funds $ 29 $ — $ 29 $ 103 $ — $ 103
Government debt securities 74 19 93 11 3 14
Corporate debt securities — 295 295 — 43 43
Other 1 4 5 — — —
$ 104 $ 318 422 $ 114 $ 46 160
Commingled investment funds (3):
Equities 292 43
Fixed income 469 69
Total assets at fair value $ 1,183 $ 272
2023
Pension Benefits Other Postretirement Benefits
Level 1 (1) Level 2 (2) Total Level 1 (1) Level 2 (2) Total
(Millions)
Cash management funds $ 17 $ — $ 17 $ 99 $ — $ 99
Government debt securities 61 17 78 9 2 11
Corporate debt securities — 311 311 — 44 44
Other 2 5 7 1 — 1
$ 80 $ 333 413 $ 109 $ 46 155
Commingled investment funds (3):
Equities 287 41
Fixed income 467 66
Total assets at fair value $ 1,167 $ 262
____________
(1)    Level 1 includes assets with fair values based on quoted prices in active markets for identical assets. Cash management funds and U.S. Treasury securities are included in this level.
(2)    Level 2 includes assets with fair values determined by using significant other observable inputs. This level includes fixed income securities, other than U.S. Treasury securities, that are valued primarily using pricing models which incorporate observable inputs such as benchmark yields, reported trades, broker/dealer quotes, and issuer spreads.
(3)    The commingled investment funds are measured at fair value using net asset value per share. Certain standard withdrawal restrictions generally apply, which may include redemption notification periods ranging from 1 day to 15 days.
Plan Benefit Payments and Employer Contributions
Following are the expected benefit payments, which reflect the same assumptions previously discussed and future service as appropriate.
Pension
Benefits Other
Postretirement
Benefits
(Millions)
2025
$ 101 $ 11
2026
95 11
2027
91 11
2028
87 11
2029
83 10
2030-2034
389 48
In 2025, Williams expects to contribute approximately $1 million to the pension plans and approximately $3 million to the other postretirement benefit plan.

v3.25.0.1

Investing Activities
12 Months Ended

Dec. 31, 2024

Investments [Abstract]

Investing Activities [Text Block]
Note 8 – Investing Activities
Equity-Method Investments

Ownership Interest at December 31, 2024
December 31,
2024 2023
(Millions)
Appalachia Midstream Investments (1) $ 2,810 $ 2,886
OPPL 50% 385 387
Blue Racer 50% 366 398
Gulfstream 50% 196 210
Laurel Mountain 69% 171 184
Discovery (2)
100% — 361
Other Various 179 188
$ 4,107 $ 4,614
___________
(1)Includes equity-method investments in multiple gathering systems in the Marcellus Shale region with an approximate average 66 percent interest.
(2)Discovery is a wholly owned subsidiary of Williams as of August 1, 2024. See Note 3 – Acquisitions and Divestitures.
Basis differential
The carrying value of Appalachia Midstream Investments exceeds Williams’ portion of the underlying net assets by approximately $1 billion and $1.1 billion at December 31, 2024 and 2023, respectively. These differences were assigned at the acquisition date to property, plant, and equipment and customer relationship intangible assets.
Certain other equity-method investments have a carrying value less than Williams’ portion of the underlying equity in the net assets primarily due to other than temporary impairments that Williams recognized but were not required to be recognized in the investees’ financial statements. These differences total approximately $634 million and $773 million at December 31, 2024 and 2023, respectively, and were assigned to property, plant, and equipment and customer relationship intangible assets. Differences in the carrying value of Williams’ equity-method investments and its portion of the equity in the underlying net assets are generally amortized over the remaining
useful lives of the associated underlying assets and included in Equity earnings (losses) within Williams’ Consolidated Statement of Income.
Purchases of and contributions to equity-method investments
Williams generally funds its portion of significant expansion or development projects of these investees through additional capital contributions. These transactions increased the carrying value of Williams’ investments and included:
Year Ended December 31,
2024 2023 2022
(Millions)
Appalachia Midstream Investments $ 74 $ 59 $ 83
Discovery 37 40 41
OPPL
2 1 —
Aux Sable Liquid Products LP
1 38 —
Cardinal Pipeline Company, LLC — — 16
Gulfstream — — 14
Other — 3 12
$ 114 $ 141 $ 166
Dividends and distributions
The organizational documents of entities in which Williams has an equity-method investment generally require distribution of available cash to members on at least a quarterly basis. These transactions reduced the carrying value of its investments and included:
Year Ended December 31,
2024 2023 2022
(Millions)
Appalachia Midstream Investments $ 407 $ 405 $ 415
Gulfstream 103 98 89
Blue Racer
95 62 49
OPPL
90 56 34
Laurel Mountain
29 42 112
Discovery 22 49 49
RMM — 49 52
Other 43 35 65
$ 789 $ 796 $ 865
Summarized Financial Position and Results of Operations of All Equity-Method Investments
December 31,
2024 2023
(Millions)
Assets (liabilities):
Current assets
$ 564 $ 669
Noncurrent assets
9,439 11,058
Current liabilities
(1,146) (358)
Noncurrent liabilities
(2,383) (3,619)
Year Ended December 31,
2024 2023 2022
(Millions)
Gross revenue $ 2,880 $ 3,714 $ 5,520
Operating income 1,190 966 1,268
Net income 987 748 1,102

Sale of Aux Sable Interest
On August 1, 2024, Williams completed the sale of its equity-method investments in Aux Sable Liquid Products Inc., Aux Sable Liquid Products LP, and Aux Sable Midstream LLC (collectively, “Aux Sable”) in Williams’ Northeast G&P segment for total consideration of $161 million. As a result of this sale, Williams recorded a gain of $149 million in the third quarter of 2024. The gain is reflected in Other investing income (loss) – net in Williams’ Consolidated Statement of Income.
Other investing income (loss) – net
The following table presents certain items reflected in Other investing income (loss) – net in Williams’ Consolidated Statement of Income:
Year Ended December 31,
2024 2023 2022
(Millions)
Gain on sale of Aux Sable investments
$ 149 $ — $ —
Gain on remeasurement of Discovery investment (Note 3)
127 — —
Interest income
67 79 15
Gain on remeasurement of RMM investment (Note 3)
— 30 —
Other
— (1) 1
$ 343 $ 108 $ 16

v3.25.0.1

Property, Plant, and Equipment
12 Months Ended

Dec. 31, 2024

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment [Text Block]
Note 9 – Property, Plant, and Equipment
The following tables present Property, plant, and equipment – net for the years ended:
Williams
Estimated
Useful Life (1)
(Years) Depreciation
Rates (1)
(%) December 31,
2024 2023
(Millions)
Nonregulated:
Natural gas gathering and processing facilities
5 - 40
$ 23,134 $ 21,357
Construction in progress Not applicable 1,543 1,138
Oil and gas properties Units of production 1,685 1,111
Other
0 - 45
4,798 3,268
Regulated:
Natural gas transmission facilities
0 - 25
1.25 - 10.2
22,763 21,083
Construction in progress Not applicable Not applicable 542 1,124
Other
5 - 45
0.00 - 33.33
2,930 2,761
Total property, plant, and equipment, at cost 57,395 51,842
Accumulated depreciation and amortization (18,703) (17,531)
Property, plant, and equipment — net $ 38,692 $ 34,311
Depreciation and amortization expense for Property, plant, and equipment – net was $1.8 billion, $1.7 billion, and $1.5 billion in 2024, 2023, and 2022, respectively.
Interest capitalized was $68 million, $54 million, and $20 million in 2024, 2023, and 2022, respectively.
Regulated Property, plant, and equipment – net includes approximately $354 million and $389 million at December 31, 2024 and 2023, respectively, related to the purchase price allocation of $1.5 billion to property, plant and equipment and adjustments to deferred taxes in excess of original cost from Williams’ purchase of Transco in 1995. This amount is being amortized over 40 years using the straight-line amortization method. Current FERC policy does not permit recovery through rates for amounts in excess of original cost of construction.
Transco
Depreciation
Rates (1)
(%) December 31,
2024 2023
(Millions)
Onshore transmission facilities
2.50 - 7.13
$ 17,242 $ 16,031
Offshore transmission facilities
1.25
659 681
Storage facilities
1.86 - 2.05
948 830
Gathering facilities
0.00 - 1.00
136 158
Construction in progress
Not applicable 420 1,008
Other
1.77 - 20.00
639 585
Total property, plant, and equipment, at cost 20,044 19,293
Accumulated depreciation and amortization (5,941) (5,963)
Property, plant, and equipment — net $ 14,103 $ 13,330
NWP
Depreciation
Rates (1)
(%) December 31,
2024 2023
(Millions)
Transmission facilities
2.70 - 10.20
$ 3,821 $ 3,570
Storage facilities
1.60 - 2.76
160 155
Construction in progress
Not applicable 66 85
Other
0.00 - 33.33
171 165
Total property, plant, and equipment, at cost 4,218 3,975
Accumulated depreciation and amortization (2,089) (2,026)
Property, plant, and equipment — net $ 2,129 $ 1,949
__________
(1) Estimated useful life and depreciation rates are presented as of December 31, 2024. Depreciation rates and estimated useful lives for regulated assets are prescribed by the FERC.
Asset Retirement Obligations
Williams’ accrued obligations primarily relate to offshore platforms and pipelines, oil and gas properties, gas transmission pipelines and facilities, underground storage caverns, gas processing, fractionation, and compression facilities, and gas gathering well connections and pipelines. At the end of the useful life of each respective asset, Williams is legally obligated to dismantle offshore platforms and appropriately abandon offshore pipelines, to remove certain components of gas transmission facilities from the ground, to restore land and remove surface equipment at gas processing, fractionation, and compression facilities, to cap certain gathering pipelines at the wellhead connection and remove any related surface equipment, to plug storage caverns and remove any related surface equipment, and to plug producing wells and remove any related surface equipment.
The following tables present the significant changes to AROs, of which $2.548 billion and $1.978 billion are included in Regulatory liabilities, deferred income, and other with the remaining current portion in Other current liabilities at December 31, 2024 and 2023, respectively.
Williams
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 2,084 $ 1,914
Liabilities incurred (1)
474 42
Liabilities settled (68) (43)
Accretion 118 97
Revisions (2)
31 74
Balance at end of year $ 2,639 $ 2,084
___________
(1)Includes $250 million, $106 million, and $114 million of ARO in 2024 related to the Discovery, Gulf Coast Storage, and Crowheart Acquisitions, respectively.
(2)Several factors are considered in the annual review process, including inflation rates, current estimates for removal cost, market risk premiums, discount rates, and the estimated remaining useful life of the assets.
Transco
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 619 $ 563
Liabilities incurred
— 8
Liabilities settled
(32) (23)
Accretion
29 31
Revisions (1)
(1) 40
Balance at end of year $ 615 $ 619
___________
(1)Changes in estimates of existing obligations are primarily due to the annual review process, which considers various factors including inflation rate, current estimates for removal costs, discount rates, and the estimated remaining life of assets.
The funds Transco collects through a portion of its rates to fund its AROs are deposited into an external trust account dedicated to funding its AROs (ARO Trust). (See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk.)
NWP
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 136 $ 129
Accretion
8 7
Balance at end of year $ 144 $ 136

NWP’s gross regulatory asset balances associated with ARO as of December 31, 2024 and 2023 were $124 million and $116 million, respectively. NWP’s regulatory asset is expected to be fully recovered through the negative salvage component of depreciation included in NWP’s rates; as such, the negative salvage component of accumulated depreciation collected through rates and reflected as a regulatory liability has been netted with the ARO regulatory asset to result in a regulatory liability of $30 million and $31 million at December 31, 2024 and 2023, respectively (See Note 10 – Regulatory Assets and Liabilities).

v3.25.0.1

Regulatory Assets and Liabilities
12 Months Ended

Dec. 31, 2024

Regulated Operations [Abstract]

Regulatory Assets and Liabilities [Table Text Block]
Note 10 – Regulatory Assets and Liabilities
The components of regulatory assets and liabilities include the effects of deferred taxes on equity funds used during construction, AROs, shipper imbalance activity, fuel and power cost differentials, depreciation, negative salvage, pension and other postretirement benefits, trackers, customer tax refunds, and rate allowances for deferred income taxes at a historically higher federal income tax rate.
Williams
December 31,
2024 2023
(Millions)
Current assets reported within Other current assets and deferred charges
$ 84 $ 95
Noncurrent assets reported within Regulatory assets, deferred charges, and other
582 527
Total regulatory assets $ 666 $ 622
Current liabilities reported within Other current liabilities
$ 85 $ 77
Noncurrent liabilities reported within Regulatory liabilities, deferred income, and other
1,300 1,288
Total regulatory liabilities $ 1,385 $ 1,365
Transco
December 31,
2024 2023
(Millions)
Current regulatory assets:
Fuel recovery $ 47 $ 60
ARO 16 16
Deferred cash out 6 6
ARO - Eminence 5 5
Total current regulatory assets 74 87
Long-term regulatory assets:
ARO 243 209
Grossed-up deferred taxes on equity AFUDC 29 31
ARO - Eminence 15 20
Slug catcher 6 6
Deferred cash out — 11
Other 27 22
Total long-term regulatory assets 320 299
Total regulatory assets $ 394 $ 386
Current regulatory liabilities:
Deferred taxes - liability $ 31 $ 31
Postretirement benefits other than pension — 8
Electric power cost 26 7
Pension — 2
Other 1 1
Total current regulatory liabilities 58 49
Long-term regulatory liabilities:
Negative salvage 632 605
Deferred taxes - liability 252 283
Postretirement benefits other than pension 31 23
Pension 30 24
Sentinel meter station depreciation 7 7
Other 24 14
Total long-term regulatory liabilities 976 956
Total regulatory liabilities $ 1,034 $ 1,005
The significant regulatory assets and liabilities include:
Fuel recovery: This amount represents the value of the cumulative volumetric difference between the gas retained from customers and the gas consumed in operations. These amounts are not included in the rate base, but assets and liabilities are expected to be recovered or refunded, respectively, in subsequent annual fuel tracker filings.
Electric power cost: This amount represents the value of the difference between the electric power costs recovered from our customers and the electric power costs incurred in operations. These amounts are expected to be recovered by changing the electric power reimbursement rate in subsequent annual electric power tracker filings.
ARO: This regulatory asset balance includes the uncollected ARO depreciation expense and accretion expense. The regulatory asset is being recovered through rates, and is being amortized to expense consistent with the amounts collected in rates (see AROs in Note 9 – Property, Plant, and Equipment).
Deferred cash out: This amount represents the deferral of gains or losses on the purchases and sales of gas imbalances with shippers. These assets and liabilities amounts will be recovered or refunded, respectively, under terms provided for in Transco’s FERC tariff.
Asset retirement costs - Eminence: This regulatory asset balance is associated with the Eminence Storage Field retirement costs. The regulatory asset is being recovered through rates and is being amortized to expense consistent with the amounts collected in rates.
Grossed-up deferred taxes on equity AFUDC: This regulatory asset balance is established to offset the deferred tax for the equity component of the allowance for funds used during the construction of long-lived assets. All amounts were generated during the period that Transco was a taxable entity. Taxes on capitalized funds used during construction and the offsetting deferred income taxes are included in the rate base and are recovered over the depreciable lives of the long-lived assets to which they relate.
Slug catcher: This amount represents certain costs associated with the replacement of a component of a slug catcher which was included in the Docket No. RP18-1126 rate case settlement. A regulatory asset has been established to recognize the recovery of Transco’s investment in the slug catcher as it is collected through Transco’s depreciation rates and is being amortized at the prescribed depreciation rate for onshore transmission facilities (see Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies).
Negative salvage: Transco’s rates include a component designed to recover certain future retirement costs for which it is not required to record an ARO. Transco records a regulatory liability representing the cumulative residual amount of recoveries through rates, net of expenditures associated with these retirement costs.
Deferred taxes - liability: This regulatory liability balance was established as a result of a decrease to rate base deferred taxes due to a decrease to the effective federal income tax rate. The timing of the refund of the regulatory liability to rate payers is stated in the Docket No. RP18-1126 rate case settlement. Additionally, as of December 31, 2024, Transco has $13 million of rate base deferred taxes established as a result of a decrease to the effective state income tax rate. This amount and timing of the refund is being addressed in Transco’s ongoing rate case.
Postretirement benefits other than pension: Transco recovers the actuarially determined cost of postretirement benefits through rates that are set through periodic general rate filings. Any differences between the annual actuarially determined cost and the amounts recovered in rates are recorded as regulatory assets or liabilities to be collected or refunded through future rate adjustments. These amounts are not included in the rate base. Effective with the Docket No. RP18-1126 rate case settlement, the other postretirement benefits regulatory liability balance as of March 1, 2019, was fully amortized in 2024 (see Note 7 – Employee Benefit Plans).
Pension: Transco recovers the actuarially determined pension cash contributions through rates that are set through periodic general rate filings. Effective with the Docket No. RP18-1126 rate case settlement, any amounts of annual contributions that fall below the threshold are recorded as adjustments to income and refunded through future rate adjustments. Also effective with the Docket No. RP18-1126 rate case settlement, the pension regulatory liability balance as of March 1, 2019, was fully amortized in 2024 (see Note 7 – Employee Benefit Plans).
Sentinel meter station depreciation: This amount reflects the incremental depreciation being recorded related to the meter station modifications made for three of the Sentinel shippers. These modifications will be recovered through a surcharge over a defined period of time as stated in the Sentinel FERC order. The incremental depreciation represents the difference between the FERC granted depreciation rate for such facilities in the last rate case as compared to the depreciation rates in the Sentinel order which are based on the contractual terms in the surcharge agreements. The incremental depreciation will be recorded through the end of the contractual term and then will be amortized.
NWP
December 31,
2024 2023
(Millions)
Current regulatory assets:
Fuel recovery $ 4 $ —
Levelized depreciation 2 2
Total current regulatory assets 6 2
Long-term regulatory assets:
Levelized depreciation 7 10
Grossed-up deferred taxes on equity AFUDC 4 4
Washington State Carbon and Greenhouse Gas Tax 38 22
Total long-term regulatory assets
49 36
Total regulatory assets $ 55 $ 38
Current regulatory liabilities:
Deferred taxes - liability $ 20 $ 20
Fuel recovery — 1
Total current regulatory liabilities 20 21
Long-term regulatory liabilities:
Deferred taxes - liability 160 179
Postretirement benefits other than pension 43 42
Negative salvage - net 30 31
Total long-term regulatory liabilities 233 252
Total regulatory liabilities $ 253 $ 273
The significant regulatory assets and liabilities include:
Fuel recovery: This amount represents the value of the cumulative volumetric difference between the gas retained from customers and the gas consumed in operations. These amounts are not included in the rate base, but assets and liabilities are expected to be recovered or refunded, respectively, in subsequent annual fuel tracker filings.
Levelized depreciation: Levelized depreciation allows contract revenue streams to remain constant over the primary contract terms by recognizing lower than book depreciation in the early years and higher than book depreciation in later years. The depreciation component of the levelized incremental rates will equal the accumulated book depreciation by the end of the primary contract terms. The difference between levelized depreciation and straight-line book depreciation is recorded as a FERC approved regulatory asset or liability and is eliminated over the levelization period.
Grossed-up deferred taxes on equity AFUDC: This regulatory asset balance is established to offset the deferred tax for the equity component of the allowance for funds used during the construction of long-lived assets. All amounts were generated during the period that NWP was a taxable entity. Taxes on capitalized funds used during construction and the offsetting deferred income taxes are included in the rate base and are recovered over the depreciable lives of the long-lived assets to which they relate.
Washington State Carbon and Greenhouse Tax: This amount represents the cost of emission allowances and the associated accumulated interest as a result of the passage of the state of Washington Climate Commitment Act
that took effect January 1, 2023. NWP’s Settlement allows it to recover the costs of purchasing allowances under the program in NWP’s next rate case.
Deferred taxes - liability: This regulatory liability balance was established as a result of a decrease to rate base deferred taxes due to a decrease to the effective federal and state income tax rates. The timing of the refund of the regulatory liability to rate payers is stated in the Docket No. RP22-1155 rate case settlement.
Postretirement benefits other than pension: NWP seeks to recover the actuarially determined cost of postretirement benefits through rates that are set through periodic general rate filings. Any differences between the annual actuarially determined cost and amounts currently being recovered in rates are recorded as regulatory assets or liabilities and collected or refunded through future rate adjustments. These amounts are not included in the rate base, and NWP is not currently recovering postretirement benefit costs in its rates (see Note 7 – Employee Benefit Plans).
Negative salvage, net of ARO asset: This regulatory liability balance reflects the amount that NWP has recovered in rates related to future retirement costs offset by depreciation of the ARO asset and accretion expense of the ARO liability due to the passage of time. AROs are expected to be fully recovered through the net negative salvage component of depreciation included in rates (see AROs in Note 9 – Property, Plant, and Equipment).

v3.25.0.1

Goodwill and Other Intangible Assets
12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets [Text Block]
Note 11 – Goodwill and Other Intangible Assets
Goodwill
Changes in the carrying amount of goodwill, included in Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, by reportable segment for the years indicated are as follows:
Transmission & Gulf of America
West
Total
(Millions)
December 31, 2022 $ — $ — $ —
MountainWest Acquisition (Note 3)
400 — 400
Cureton Acquisition (Note 3)
— 6 6
RMM Acquisition (Note 3)
— 57 57
December 31, 2023 400 63 463
Cureton Acquisition (Note 3)
— 5 5
RMM Acquisition (Note 3)
— (2) (2)
December 31, 2024 $ 400 $ 66 $ 466
Goodwill is not subject to amortization, but is evaluated at least annually for impairment or more frequently if impairment indicators are present. Williams did not identify or recognize any impairments to goodwill in connection with the evaluation of goodwill for impairment during the year ended December 31, 2024.
Other Intangible Assets
The gross carrying amount and accumulated amortization of other intangible assets, included in Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, at December 31 are as follows:
2024 2023
Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization
(Millions)
Customer relationships $ 10,239 $ (3,523) $ 10,237 $ (3,155)
Transportation and storage capacity contracts 267 (244) 267 (223)
Other
6 (2) 6 (2)
Other intangible assets
$ 10,512 $ (3,769) $ 10,510 $ (3,380)
Customer Relationships
Customer relationships primarily relate to gas gathering, processing, and fractionation contractual customer relationships recognized in acquisitions. Contractual customer relationships are being amortized on a straight-line basis over periods of up to 30 years, which represents the term over which the contractual customer relationships are expected to contribute to cash flows.
Williams expenses costs incurred to renew or extend the terms of its gas gathering, processing, and fractionation contracts with customers. Although a significant portion of the expected future cash flows associated with these contractual customer relationships are dependent on the ability to renew or extend the arrangements beyond the initial contract periods, these expected future cash flows are significantly influenced by the scope and pace of Williams’ producer customers’ drilling programs. Once producer customers’ wells are connected to Williams’ gathering infrastructure, their likelihood of switching to another provider before the wells are abandoned is reduced due to the significant capital investment required.
The amortization expense related to customer relationships was $368 million, $360 million, and $353 million in 2024, 2023, and 2022, respectively. The estimated amortization expense for each of the next five succeeding fiscal years is $368 million, $364 million, $360 million, $360 million, and $360 million.
Transportation and Storage Capacity Contracts
Certain transportation and storage capacity contracts were recognized as intangible assets as part of the acquisition of Sequent in 2021. The amortization expense related to transportation and storage capacity contracts was $21 million, $51 million, and $158 million in 2024, 2023, and 2022, respectively. The estimated amortization expense for each of the next five succeeding fiscal years is $10 million, $7 million, $4 million, $2 million, and $0 million.

v3.25.0.1

Other Current Liabilities
12 Months Ended

Dec. 31, 2024

Accrued Liabilities, Current [Abstract]

Other Current Liabilities [Text Block]
Note 12 – Other Current Liabilities
Williams
December 31,
2024 2023
(Millions)
Interest on debt $ 350 $ 322
Employee costs 285 197
Contract liabilities (Note 5) 170 159
Alaska refinery contamination litigation (Note 1) — 134
Asset retirement obligations (Note 9) 91 106
Regulatory liabilities (Note 10) 85 77
Operating lease liabilities (Note 14) 26 24
Other, including accrued loss contingencies 353 265
$ 1,360 $ 1,284

Transco
December 31,
2024 2023
(Millions)
Interest on debt $ 76 $ 76
Contract liabilities 10 10
Customer deposits 38 35
Other 57 69
$ 181 $ 190

NWP
December 31,
2024 2023
(Millions)
Interest on debt $ 6 $ 6
Taxes, other than income taxes 8 7
Contract liabilities — 1
Transportation and gas exchange payables 10 5
Other 10 15
$ 34 $ 34

v3.25.0.1

Debt and Banking Arrangements
12 Months Ended

Dec. 31, 2024

Debt Disclosure [Abstract]

Debt and Banking Arrangements [Text Block]
Note 13 – Debt and Banking Arrangements
Long-Term Debt by Issuing Entity
December 31,
2024 2023

(Millions)
Transco:
7.08% Debentures due 2026
$ 8 $ 8
7.25% Debentures due 2026
200 200
7.85% Notes due 2026
1,000 1,000
4% Notes due 2028
400 400
3.25% Notes due 2030
700 700
5.4% Notes due 2041
375 375
4.45% Notes due 2042
400 400
4.6% Notes due 2048
600 600
3.95% Notes due 2050
500 500
Other financing obligation — Atlantic Sunrise 764 790
Other financing obligation — Leidy South 75 76
Other financing obligation — Dalton 247 250
Unamortized debt issuance costs
(23) (26)
Net unamortized debt premium (discount)
(11) (12)
Total debt — Transco
$ 5,235 $ 5,261
MountainWest:
3.53% Notes due 2028 (Note 3)
$ 100 $ 100
3.91% Notes due 2038 (Note 3)
150 150
4.875% Notes due 2041 (Note 3)
180 180
Net unamortized debt premium (discount)
(58) (61)
Total debt — MountainWest
$ 372 $ 369
NWP:
7.125% Debentures due 2025
$ 85 $ 85
4% Notes due 2027
500 500
Unamortized debt issuance costs
(1) (2)
Net unamortized debt premium (discount)
(2) (2)
Total debt — NWP
$ 582 $ 581
Williams:
4.3% Notes due 2024
$ — $ 1,000
4.55% Notes due 2024
— 1,250
3.9% Notes due 2025
750 750
4% Notes due 2025
750 750
5.4% Notes due 2026
1,100 1,100
7.7% Notes due 2027
2 2
3.75% Notes due 2027
1,450 1,450
5.3% Notes due 2028
900 900
4.9% Notes due 2029
1,100 —
4.8% Notes due 2029
450 —
3.5% Notes due 2030
1,000 1,000
2.6% Notes due 2031
1,500 1,500
7.5% Debentures due 2031
339 339
7.75% Notes due 2031
252 252
8.75% Notes due 2032
445 445
4.65% Notes due 2032
1,000 1,000
5.65% Notes due 2033
750 750
5.15% Notes due 2034
1,300 —
6.3% Notes due 2040
1,250 1,250
5.8% Notes due 2043
400 400
December 31,
2024 2023

(Millions)
5.4% Notes due 2044
500 500
5.75% Notes due 2044
650 650
4.9% Notes due 2045
500 500
5.1% Notes due 2045
1,000 1,000
4.85% Notes due 2048
800 800
3.5% Notes due 2051
650 650
5.3% Notes due 2052
750 750
5.8% Notes due 2054
750 —
Unamortized debt issuance costs
(130) (112)
Net unamortized debt premium (discount)
(41) (39)
Total debt — Williams
$ 20,167 $ 18,837
RMM deferred consideration obligation (Note 3) — 665
Gulf Coast Storage deferred consideration obligation (Note 3)
100 —
Total debt
$ 26,456 $ 25,713
Long-term debt due within one year — Williams
(1,600) (2,305)
Long-term debt due within one year — Transco
(35) (32)
Long-term debt due within one year — NWP
(85) —
Long-term debt $ 24,736 $ 23,376
Certain of Williams’ debt agreements contain covenants that restrict or limit, among other things, its ability to create liens supporting indebtedness, sell assets, and incur additional debt. Default of these agreements could also restrict Williams’ ability to make certain distributions or repurchase equity.
The following table presents aggregate minimum maturities of long-term debt, other financing obligations, and the Gulf Coast Storage deferred consideration obligation, excluding net unamortized debt premium (discount) and debt issuance costs, for each of the next five years:
December 31, 2024
(Millions)
Williams:
2025 $ 1,720
2026 2,345
2027 1,994
2028 1,445
2029 1,600
Transco:
2025 $ 35
2026 1,245
2027 41
2028 445
2029 50
NWP:
2025 $ 85
2027 500
Issuances
Williams senior unsecured public debt issuances for the past three years and subsequent to the balance sheet date are as follows:
Issue Date
Maturity Date
Amount
Rate
(Millions)
January 9, 2025
March 15, 2035 $ 1,000 5.600%
January 9, 2025
March 15, 2055 500 6.000%
August 13, 2024 November 15, 2029 450 4.800%
August 13, 2024 (1) March 15, 2034 300 5.150%
August 13, 2024 November 15, 2054 750 5.800%
January 5, 2024 March 15, 2029 1,100 4.900%
January 5, 2024 March 15, 2034 1,000 5.150%
August 10, 2023 (2) March 2, 2026 350 5.400%
August 10, 2023 August 15, 2028 900 5.300%
March 2, 2023 March 2, 2026 750 5.400%
March 2, 2023 March 15, 2033 750 5.650%
August 8, 2022 August 15, 2032 1,000 4.650%
August 8, 2022 August 15, 2052 750 5.300%
________________
(1)    Additional issuance of the 5.15 percent senior notes due 2034 issued on January 5, 2024, and trade interchangeably with such notes.
(2)    Additional issuance of the 5.40 percent senior notes due 2026 issued on March 2, 2023, and trade interchangeably with such notes.
Retirements
Williams’ senior unsecured public debt retirements for the past three years and subsequent to the balance sheet date are as follows:
Date of Retirement
Maturity Date
Amount
Rate
(Millions)
January 15, 2025 January 15, 2025 $ 750 3.900%
June 24, 2024 June 24, 2024 1,250 4.550%
March 4, 2024 March 4, 2024 1,000 4.300%
November 15, 2023 November 15, 2023 600 4.500%
October 17, 2022 January 15, 2023 850 3.700%
May 16, 2022 August 15, 2022 750 3.350%
January 18, 2022 March 15, 2022 1,250 3.600%
Other financing obligations
During the construction of the Atlantic Sunrise, Leidy South, and Dalton projects, Transco received funding from co-owners for their proportionate share of construction costs. Amounts received were recorded within
noncurrent liabilities and the costs associated with construction were capitalized. Upon placing these projects into service Transco began utilizing the co-owners’ undivided interest in the assets, including the associated pipeline capacity, and reclassified the funding previously received from its co-owners from noncurrent liabilities to debt. The obligations, which mature in 2038, 2041, and 2052, respectively, require monthly interest and principal payments and bear interest rates of approximately 9 percent, 13 percent, and 9 percent, respectively.
Credit Facility
December 31, 2024
Stated Capacity Outstanding
(Millions)
Long-term credit facility (1) $ 3,750 $ —
Letters of credit under certain bilateral bank agreements 15
________________
(1)    In managing its available liquidity, Williams does not expect a maximum outstanding amount in excess of the capacity of its credit facility inclusive of any outstanding amounts under the commercial paper program.
Revolving credit facility
In October 2021, Williams along with Transco and NWP, the lenders named therein, and an administrative agent entered into an amended and restated credit agreement (Credit Agreement) that reduced aggregate commitments available from $4.5 billion to $3.75 billion, with up to an additional $500 million increase in aggregate commitments available under certain circumstances. The Credit Agreement was effective on October 8, 2021. In the second quarter of 2023, the maturity date of the Credit Agreement was extended one year and now expires October 8, 2027. The amended Credit Agreement allows the co-borrowers to request up to two extensions of the maturity date each for an additional one-year period to allow a maturity date as late as October 8, 2029, under certain circumstances. Additionally, the amended Credit Agreement replaces the London Interbank Offered Rate with the Term Secured Overnight Financing Rate as the benchmark interest rate index. The Credit Agreement allows for swing line loans up to an aggregate of $200 million, subject to available capacity under the credit facility, and letters of credit commitments of $500 million. Transco and NWP are each able to borrow up to $500 million under this credit facility to the extent not otherwise utilized by the other co-borrowers.
The Credit Agreement contains the following terms and conditions:
•Various covenants may limit, among other things, a borrower’s and its material subsidiaries’ ability to grant certain liens supporting indebtedness, merge or consolidate, sell all or substantially all of its assets in certain circumstances, make certain distributions during an event of default, and each borrower and each borrower’s respective material subsidiaries’ ability to enter into certain restrictive agreements.
•If an event of default with respect to a borrower occurs under the credit facility, the lenders will be able to terminate the commitments for the respective borrowers and accelerate the maturity of the loans of the defaulting borrower under the credit facility and exercise other rights and remedies.
•Other than swing line loans, each time funds are borrowed, the applicable borrower may choose from two methods of calculating interest: a fluctuating base rate equal to an alternative base rate as defined in the Credit Agreement plus an applicable margin or a periodic fixed rate equal to the Term Secured Overnight Financing Rate plus an applicable margin. Williams is required to pay a commitment fee based on the unused portion of the credit facility. The applicable margin is determined by reference to a pricing schedule based on the applicable borrower’s senior unsecured long-term debt ratings and the commitment fee is determined by reference to a pricing schedule based on Williams’ senior unsecured long-term debt ratings.
Significant financial covenants under the Credit Agreement require Williams’ ratio of debt to EBITDA (earnings before interest, taxes, depreciation, and amortization), each as defined in the Credit Agreement, to be no
greater than 5.0 to 1.0, except that for any fiscal quarter in which the funding of the purchase price for an acquisition (whether effectuated as one or a series of related transactions) with an aggregate purchase price of $25 million or more has been effected, and the following two fiscal quarters (in each case subject to certain limitations), the ratio of debt to EBITDA is to be no greater than 5.5 to 1.
The ratio of debt to capitalization (defined as net worth plus debt), each as defined in the Credit Agreement, must be no greater than 65 percent for each of Transco and NWP.
Williams expects to be in compliance with these covenants for the December 31, 2024 reporting period.
Commercial Paper Program
Williams has a $3.5 billion commercial paper program. The maturities of the commercial paper notes vary but may not exceed 397 days from the date of issuance. The commercial paper notes are sold under customary terms in the commercial paper market and are issued at a discount from par, or, alternatively, are sold at par and bear varying interest rates on a fixed or floating basis. The net proceeds of issuances of the commercial paper notes are expected to be used to fund planned capital expenditures and for other general corporate purposes. At December 31, 2024, $455 million commercial paper was outstanding at a weighted-average interest rate of 4.6 percent. At December 31, 2023, $725 million of commercial paper was outstanding at a weighted-average interest rate of 5.6 percent.
Restrictive Debt Covenants
At December 31, 2024, none of Transco’s nor NWP’s debt instruments restrict the amount of distributions to Williams, provided, however, that under the credit facility described above, Transco or NWP are restricted from making distributions to Williams during an event of default if Transco or NWP have directly incurred indebtedness under the credit facility. The debt agreements of Transco and NWP contain restrictions on their ability to incur secured debt beyond certain levels and to guarantee certain indebtedness. The indenture governing Transco’s $1 billion of 7.85 percent Senior Notes due 2026 further restricts its ability to guarantee certain indebtedness. Transco and NWP expect to be in compliance with these covenants, for the December 31, 2024 reporting period.
Cash Payments for Interest by Registrant (Net of Amounts Capitalized)
Year Ended December 31,
2024 2023 2022
(Millions)
Williams $ 1,293 $ 1,152 $ 1,117
Transco 302 307 326
NWP 24 26 26

v3.25.0.1

Leases
12 Months Ended

Dec. 31, 2024

Leases [Abstract]

Leases [Text Block]
Note 14 – Leases
Williams, Transco, and NWP are lessees through noncancellable lease agreements for property and equipment consisting primarily of buildings, land, vehicles, and equipment used in both its operations and administrative functions.
Williams
Year Ended December 31,
2024 2023 2022
(Millions)
Lease Cost:
Operating lease cost $ 39 $ 38 $ 34
Variable lease cost 31 31 26
Sublease income — (1) —
Total lease cost $ 70 $ 68 $ 60
Cash paid for operating lease liabilities $ 37 $ 37 $ 33
December 31,
2024 2023
(Dollars in Millions)
Other Information:
Right-of-use assets (included in Regulatory assets, deferred charges, and other)
$ 154 $ 159
Operating lease liabilities:
Current (included in Other current liabilities)
$ 26 $ 24
Noncurrent (included in Regulatory liabilities, deferred income, and other)
$ 142 $ 148
Weighted-average remaining lease term – operating leases (years)
11 11
Weighted-average discount rate – operating leases
4.90% 4.78%
At December 31, 2024, the following table represents operating lease maturities, including renewal provisions Williams has assessed as being reasonably certain of exercise, for each of the years ended December 31:
(Millions)
2025 $ 34
2026 33
2027 30
2028 22
2029 19
Thereafter 86
Total future lease payments 224
Less: Amount representing interest 56
Total obligations under operating leases $ 168
Williams is the lessor to certain lease agreements for office space in its headquarters building, which are insignificant to its financial statements.
Transco
Year Ended December 31,
2024 2023 2022
(Millions)
Lease Cost:
Operating lease cost $ 9 $ 9 $ 9
Variable lease cost 7 7 7
Total lease cost $ 16 $ 16 $ 16
Cash paid for operating lease liabilities $ 9 $ 10 $ 10
December 31,
2024 2023
(Dollars in Millions)
Other Information:
Right-of-use assets (included in Deferred charges and other in Transco’s Balance Sheet)
$ 48 $ 53
Operating lease liabilities:
Current (included in Other current liabilities in Transco’s Balance Sheet)
$ 6 $ 6
Noncurrent (included in Deferred income and other in Transco’s Balance Sheet)
$ 51 $ 56
Weighted-average remaining lease term – operating leases (years) 13 13
Weighted-average discount rate – operating leases 4.77% 4.73%
As of December 31, 2024, the following table represents operating lease maturities, including renewal provisions that Transco has assessed as being reasonably certain of exercise, for each of the years ended December 31:
(Millions)
2025 $ 9
2026 9
2027 10
2028 10
2029 10
Thereafter 32
Total future lease payments 80
Less: Amount representing interest 23
Total obligations under operating leases $ 57
NWP
Year Ended December 31,
2024 2023 2022
(Millions)
Lease Cost:
Operating lease cost $ 3 $ 1 $ 1
Variable lease cost 1 1 1
Total lease cost $ 4 $ 2 $ 2
Cash paid for operating lease liabilities $ 2 $ 1 $ 1
December 31,
2024 2023
(Dollars in Millions)
Other Information:
Right-of-use assets (included in Deferred charges and other in NWP’s Balance Sheet)
$ 5 $ 9
Operating lease liabilities:
Current (included in Other current liabilities in NWP’s Balance Sheet)
$ 1 $ 1
Noncurrent (included in Deferred income and other in NWP’s Balance Sheet)
$ 5 $ 7
Weighted-average remaining lease term – operating leases (years) 19 15
Weighted-average discount rate – operating leases 4.90% 4.18%
As of December 31, 2024, the following table represents operating lease maturities, including renewal provisions that NWP has assessed as being reasonably certain of exercise, for each of the years ended December 31:
(Millions)
2025 $ 1
2026 —
2027 1
2028 —
2029 1
Thereafter 6
Total future lease payments 9
Less: Amount representing interest 3
Total obligations under operating leases $ 6

v3.25.0.1

Equity-Based Compensation
12 Months Ended

Dec. 31, 2024

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Equity-Based Compensation [Text Block]
Note 15 – Equity-Based Compensation
Williams’ Plan Information
The Williams Companies, Inc. 2007 Incentive Plan (the Plan) provides common-stock-based awards to both employees and nonmanagement directors. To date, 50 million new shares have been authorized for making awards under the Plan. The Plan permits the granting of various types of awards including, but not limited to, restricted stock units and stock options. At December 31, 2024, 17 million shares of common stock were reserved for issuance pursuant to existing and future stock awards, of which 9 million shares were available for future grants.
Additionally, up to 5.2 million new shares of Williams’ common stock have been authorized to date to be available for sale under Williams’ Employee Stock Purchase Plan (ESPP). Employees purchased 240 thousand shares at a weighted-average price of $33.00 per share during 2024. Approximately 0.7 million shares were available for purchase under the ESPP at December 31, 2024.
Williams recognizes compensation expense on employee stock-based awards on a straight-line basis; forfeitures are recognized when they occur. Operating and maintenance expenses and Selling, general, and administrative expenses in Williams’ Consolidated Statement of Income include equity-based compensation expense in 2024, 2023, and 2022 of $99 million, $77 million, and $73 million, respectively. Income tax benefit recognized related to the stock-based compensation expense in 2024, 2023, and 2022 was $24 million, $19 million, and $18 million, respectively. Measured but unrecognized stock-based compensation expense at December 31, 2024, was $70 million, all of which related to restricted stock units. These amounts are expected to be recognized over a weighted-average period of 1.7 years.
Nonvested Restricted Stock Units
At December 31, 2024 and 2023, Williams had restricted stock units outstanding, including performance-based shares, of 6.4 million shares and 6.6 million shares, respectively, with a weighted-average fair value of $32.48 and $28.34, respectively. During 2024 and 2023, Williams granted 3.1 million and 3.8 million shares of restricted stock units with a weighted-average fair value of $31.77 and $27.43, respectively. Restricted stock units generally vest after three years. Performance-based grants may vest at a range from zero percent to 200 percent of the original shares granted based on performance against a target. At December 31, 2024, there were 1.8 million performance-based shares outstanding.
Stock Options
There were no stock options granted in 2024, 2023, or 2022. At December 31, 2024, Williams had 0.4 million stock options that were both outstanding and exercisable, with a weighted-average exercise price of $29.99. The weighted-average remaining contractual life for stock options that were both outstanding and exercisable at December 31, 2024, was 2.4 years. Cash received for the exercise of stock options in 2024 and 2023 was $5 million and $2 million, respectively, and the related income tax benefit recognized in both 2024 and 2023 was $2 million.

v3.25.0.1

Fair Value Measurements, Guarantees, and Concentration of Credit Risk
12 Months Ended

Dec. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurements, Guarantees, and Concentration of Credit Risk [Text Block]
Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk
The following table presents, by level within the fair value hierarchy, certain of Williams’, Transco’s, and NWP’s significant financial assets and liabilities. The carrying values of cash and cash equivalents, accounts receivable, accounts payable, and commercial paper approximate fair value because of the short-term nature of these instruments. Therefore, these assets and liabilities are not presented in the following table.
Fair Value Measurements Using
Carrying
Amount Fair
Value Quoted
Prices In
Active
Markets for
Identical
Assets
(Level 1) Significant
Other
Observable
Inputs
(Level 2) Significant
Unobservable
Inputs
(Level 3)
(Millions)
Assets (liabilities) at December 31, 2024:
Measured on a recurring basis:
ARO Trust investments - Transco
$ 297 $ 297 $ 297 $ — $ —
Commodity derivative assets (1)
344 726 427 188 111
Commodity derivative liabilities (1)
(400) (1,070) (532) (475) (63)
Additional disclosures:
Debt by issuer, including current portion:
Williams
(20,167) (19,517) — (19,517) —
Transco (5,235) (5,276) — (5,276) —
NWP (582) (573) — (573) —
MountainWest (372) (364) — (364) —
Gulf Coast Storage deferred consideration obligation (Note 3)
(100) (100) — (100) —
Total debt
(26,456) (25,830) — (25,830) —
Guarantees (36) (28) — (12) (16)
Assets (liabilities) at December 31, 2023:
Measured on a recurring basis:
ARO Trust investments - Transco
$ 269 $ 269 $ 269 $ — $ —
Commodity derivative assets (1)(2)
314 866 514 196 156
Commodity derivative liabilities (1)(2)
(287) (841) (376) (362) (103)
Interest rate derivatives
6 6 — 6 —
Additional disclosures:
Debt by issuer, including current portion:
Williams
(18,837) (18,494) — (18,494) —
Transco (5,261) (5,438) — (5,438) —
NWP (581) (581) — (581) —
MountainWest (369) (375) — (375) —
RMM deferred consideration obligation (Note 3)
(665) (665) — (665) —
Total debt
(25,713) (25,553) — (25,553) —
Guarantees (37) (28) — (12) (16)
(1)The carrying amount is presented net of counterparty offsetting arrangements and collateral (see Note 17 – Commodity Derivatives).
(2)Previously, the fair value of Williams’ commodity derivative assets and liabilities were disclosed by level within the fair value hierarchy net of counterparty offsetting arrangements. The December 31, 2023, amounts have been corrected to disclose the fair values by level on a gross basis, as presented above.
Fair Value Methods
The following methods and assumptions are used in estimating the fair value of financial instruments:
Assets Measured at Fair Value on a Recurring Basis
ARO Trust investments
Transco is entitled to collect rates in the amounts necessary to fund its future AROs and deposits a portion of the collected rates, pursuant to the terms of its Docket Number RP18-1126 rate case settlement, into an ARO Trust. The ARO Trust invests in a moderate risk portfolio of actively traded mutual funds that are measured at fair value on a recurring basis based on quoted prices in an active market and is reported in Regulatory assets, deferred charges, and other in Williams’ Consolidated Balance Sheet and in Deferred charges and other in the Transco Balance Sheet. The Money Market Funds held in the ARO Trust are considered investments. Both realized and unrealized gains and losses are ultimately recorded to the ARO regulatory asset.
Pursuant to the approved stipulation and agreement in Docket Number RP18-1126 the annual funding obligation effective March 1, 2020, is approximately $16 million, with deposits made monthly.
Transco investments within the ARO Trust were as follows:
December 31, 2024 December 31, 2023
Amortized Cost Basis
Fair Value
Amortized Cost Basis
Fair Value
(Millions)
Money Market Funds
$ 27 $ 27 $ 26 $ 26
U.S. Equity Funds
53 146 53 120
International Equity Funds
32 40 32 39
Municipal Bond Funds
88 84 87 84
Total
$ 200 $ 297 $ 198 $ 269
Commodity derivatives
Williams’ commodity derivatives include exchange-traded contracts and OTC contracts, which consist of physical forwards, futures, and swaps that are measured at fair value on a recurring basis. Williams also has other derivatives related to asset management agreements and other contracts that require physical delivery. Derivatives classified as Level 1 are valued using New York Mercantile Exchange (NYMEX) futures prices. Derivatives classified as Level 2 are valued using basis transactions that represent the cost to transport natural gas from a NYMEX delivery point to the contract delivery point. These transactions are based on quotes obtained either through electronic trading platforms or directly from brokers. Derivatives classified as Level 3 are valued using a combination of observable and unobservable inputs. See Note 17 – Commodity Derivatives for additional information.
The following table presents a reconciliation of changes in fair value of the net commodity derivatives classified as Level 3 in the fair value hierarchy.
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of period $ 53 $ (56)
Gains (losses) included in Williams’ Consolidated Statement of Income
(5) 91
Purchases, issuances, and settlements (1) 20
Transfers into Level 3 1 —
Transfers out of Level 3 — (2)
Balance at end of period $ 48 $ 53
A substantial portion of the December 31, 2024, and December 31, 2023, Level 3 derivatives relate to a long-term physical natural gas purchase contract associated with an ongoing pipeline expansion project. The valuation of this contract reflects the extrapolation of forward natural gas prices for periods beyond observable price curves, which is considered a significant unobservable input.
Interest rate derivatives
At December 31, 2023, Williams held interest rate derivative agreements with notional amounts totaling $1.15 billion. During 2024, Williams entered into additional agreements totaling $950 million of notional value and terminated agreements totaling $1.75 billion of notional value coinciding with issuances of long-term debt (see Note 13 – Debt and Banking Arrangements). At December 31, 2024, Williams holds interest rate derivative agreements with notional amounts totaling $350 million. The fair value of these derivatives is determined using discounted cash flows considering forward interest rates and the terms of the agreements, corroborated by counterparty valuations, and is classified as a Level 2 measurement. These derivatives are designated as cash flow hedges to reduce interest rate exposure on future corporate debt issuances. Gains and losses on these derivative agreements are reflected as a component of AOCI and, after the termination of the agreements, are amortized to earnings over the term of the related debt as a component of Interest expense. These interest rate derivative agreements are reported in Derivative assets and Derivative liabilities.
Additional Fair Value Disclosures
Long-term debt, including current portion
The disclosed fair value of long-term debt is determined primarily by a market approach using broker quoted indicative period-end bond prices. The quoted prices are based on observable transactions in less active markets for the debt or similar instruments. The fair values of the financing obligations associated with Transco’s Dalton, Leidy South, and Atlantic Sunrise projects, as well as the deferred consideration obligations associated with the RMM Acquisition and the Gulf Coast Storage Acquisition (see Note 3 – Acquisitions and Divestitures), all included within long-term debt including current portion, were determined using an income approach (see Note 13 – Debt and Banking Arrangements).
Guarantees
Guarantees primarily consist of a guarantee Williams has provided in the event of nonpayment by a previously owned communications subsidiary, Williams Communications Group, Inc., (WilTel), on a lease performance obligation that extends through 2042. Guarantees also include an indemnification related to a disposed operation.
To estimate the fair value of the WilTel guarantee, an estimated default rate is applied to the sum of the future contractual lease payments using an income approach. The estimated default rate is determined by obtaining the
average cumulative issuer-weighted default rate based on the credit rating of WilTel’s current owner and the term of the underlying obligation. The default rate is published by Moody’s Investors Service. The carrying value of the WilTel guarantee is reported in Other current liabilities. The maximum potential undiscounted liquidity exposure is approximately $22 million at December 31, 2024. The exposure declines systematically through the remaining term of WilTel’s obligation.
The fair value of the guarantee associated with the indemnification related to a disposed operation was estimated using an income approach that considered probability-weighted scenarios of potential levels of future performance. The terms of the indemnification do not limit the maximum potential future payments associated with the guarantee. The carrying value of this guarantee is reported in Regulatory liabilities, deferred income, and other.
Williams is required by its revolving credit agreement to indemnify lenders for certain taxes required to be withheld from payments due to the lenders and for certain tax payments made by the lenders. The maximum potential amount of future payments under these indemnifications is based on the related borrowings and such future payments cannot currently be determined. These indemnifications generally continue indefinitely unless limited by the underlying tax regulations and have no carrying value. Williams has never been called upon to perform under these indemnifications and there is no current expectation of a future claim.
Concentration of Credit Risk
Accounts receivable
The following table summarizes Williams’ concentration of receivables, net of allowances:
December 31,
2024 2023
(Millions)
NGLs, natural gas, and related products and services $ 594 $ 589
Regulated interstate natural gas transportation and storage 339 310
Marketing of natural gas and NGLs 516 321
Upstream activities 45 72
Accounts receivable related to revenues from contracts with customers
1,494 1,292
Receivables from derivatives 294 311
Other accounts receivable 75 52
Trade accounts and other receivables - net $ 1,863 $ 1,655
Williams’ customers include producers, distribution companies, industrial users, gas marketers, and pipelines primarily located in the continental United States. As a general policy, collateral is not required for receivables with the exception of the marketing receivables discussed below. Customers’ financial condition and credit worthiness are evaluated regularly and, based upon this evaluation, Williams may obtain collateral to support receivables.
Williams uses established credit policies to determine and monitor the creditworthiness of gas marketing and trading counterparties, including requirements to post collateral or other credit security, as well as the quality of pledged collateral. Collateral or credit security is most often in the form of cash or letters of credit from an investment-grade financial institution, but may also include U.S. government securities. Williams also utilizes netting agreements whenever possible to mitigate exposure to gas marketing and trading counterparty credit risk. When more than one derivative transaction with the same counterparty is outstanding and a legally enforceable netting agreement exists with that counterparty, the “net” mark-to-market exposure represents a reasonable measure of the credit risk with that counterparty.
Transco and NWP receivables from contracts with customers are included within Receivables - Trade and Receivables - Affiliates. Receivables that are not related to contracts with customers are included within the balance of Receivables - Advances to affiliate and Receivables - Other.
Revenues
Customers representing 10 percent or more of Transco’s and NWP’s revenues include:
Year Ended December 31,
2024 2023 2022
(Millions)
Transco:
Dominion Energy, Inc (1) $ 217 $ 287 $ 293
NWP:
Puget Sound Energy, Inc. $ 136 $ 126 $ 131
Cascade Natural Gas Corporation 46 47 49
Northwest Natural Gas Company 47 47 49
_______________
(1) The 2024 amount is less than 10 percent of Transco’s revenue.

v3.25.0.1

Commodity Derivatives
12 Months Ended

Dec. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Commodity Derivatives [Text Block]
Note 17 – Commodity Derivatives
Williams is exposed to commodity price risk and utilizes derivatives to manage a portion of that risk. Williams reports the fair value of commodity derivatives in Derivative assets; Regulatory assets, deferred charges, and other; Derivative liabilities; or Regulatory liabilities, deferred income, and other. These amounts are presented on a net basis by counterparty and reflect the netting of asset and liability positions permitted under the terms of master netting arrangements and cash held on deposit in margin accounts that Williams has received or remitted to collateralize certain derivative positions. See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk for additional fair value information. In Williams’ Consolidated Statement of Cash Flows, any cash impacts of settled commodity derivatives are recorded as operating activities.
Williams enters into commodity derivatives to economically hedge exposures to natural gas, NGLs, and crude oil and retains exposure to price changes that can, in a volatile energy market, be material and can adversely affect its results of operations.
Volumes
At December 31, 2024, the notional volume of the net long (short) positions for Williams’ commodity derivative contracts were as follows:
Commodity Unit of Measure Net Long (Short) Position
Index Risk Natural Gas MMBtu 592,842,257
Central Hub Risk - Henry Hub Natural Gas MMBtu (50,513,793)
Basis Risk Natural Gas MMBtu 13,306,615
Central Hub Risk - Mont Belvieu Natural Gas Liquids Barrels (2,561,000)
Basis Risk Natural Gas Liquids Barrels (205,000)
Central Hub Risk - WTI Crude Oil Barrels (480,000)
Financial Statement Presentation
The fair value of commodity derivatives, which are not designated as hedging instruments for accounting purposes, is reflected as follows:
December 31,
2024 December 31,
2023
Commodity Derivatives Categories
Assets (Liabilities) Assets (Liabilities)
(Millions)
Current $ 508 $ (635) $ 623 $ (496)
Noncurrent 218 (435) 243 (345)
Total commodity derivatives
$ 726 $ (1,070) $ 866 $ (841)
Counterparty and collateral netting offset (382) 670 (552) 554
Amounts recognized in Williams’ Consolidated Balance Sheet $ 344 $ (400) $ 314 $ (287)
The pre-tax impacts of Williams’ commodity derivatives, which are not designated as hedging instruments for accounting purposes, are reflected as follows:
Year Ended December 31,
2024 2023 2022
(Millions)
Net gain (loss) from commodity derivatives within Total revenues:
Realized
$ 111 $ 253 $ (91)
Unrealized
(361) 703 (296)
$ (250) $ 956 $ (387)
Net gain (loss) from commodity derivatives within Net processing commodity expenses:
Realized
$ (8) $ (4) $ 16
Unrealized
(6) (43) 47
$ (14) $ (47) $ 63
Total net gain (loss) from commodity derivatives
$ (264) $ 909 $ (324)
Contingent Features
Generally, collateral may be provided in the form of a parent guaranty, letter of credit, or cash. If collateral is required, fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are offset against fair value amounts recognized for derivatives executed with the same counterparty.
Williams has specific trade and credit contracts that contain minimum credit rating requirements. These credit rating requirements typically give counterparties the right to suspend or terminate credit if Williams’ credit ratings are downgraded to non-investment grade status. Under such circumstances, Williams would need to post collateral to continue transacting business with these counterparties. At December 31, 2024, the contractually required collateral in the event of a credit rating downgrade to non-investment grade status was $6 million.
Williams maintains accounts with brokers or the clearing houses of certain exchanges to facilitate financial derivative transactions. Based on the value of the positions in these accounts and the associated margin requirements, Williams may be required to deposit cash into these accounts. At December 31, 2024, and 2023, net cash collateral held on deposit in broker margin accounts was $288 million, and $2 million, respectively.

v3.25.0.1

Contingencies and Commitments
12 Months Ended

Dec. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Contingencies and Commitments [Text Block]
Note 18 – Contingencies and Commitments
Royalty Matters
Certain customers, including Expand Energy Corporation (formerly Chesapeake Energy Corporation or Chesapeake), have been named in various lawsuits alleging underpayment of royalties and claiming, among other things, violations of anti-trust laws and the Racketeer Influenced and Corrupt Organizations Act. Williams has also been named as a defendant in certain of these cases filed in Pennsylvania based on allegations that Williams improperly participated with Chesapeake in causing the alleged royalty underpayments. Williams believes that the claims asserted are subject to indemnity obligations owed to Williams by Chesapeake, which obligations survived Chesapeake’s bankruptcy proceedings. Prior to its bankruptcy, Chesapeake reached a settlement to resolve substantially all Pennsylvania royalty cases pending. During the pendency of the bankruptcy, that settlement was renegotiated. The settlement applies to both Chesapeake and Williams and does not require any contribution from Williams. On August 23, 2021, after referral to the United States District Court for the Southern District of Texas by the bankruptcy court, the court approved the settlement. Two objectors filed an appeal with the United States Court of Appeals for the Fifth Circuit. On June 8, 2023, the Court of Appeals vacated the settlement approval and remanded to the United States District Court for the Southern District of Texas with instructions to dismiss the settlement proceedings for lack of jurisdiction. On August 31, 2023, the bankruptcy court entered an order finding the settlement agreements to be null and void. Certain plaintiffs have filed a notice of dismissal of their claims against Chesapeake that arose prior to February 8, 2021, in the United States District Court for the Middle District of Pennsylvania lawsuits. The notice states that plaintiffs are not releasing their claims against the other defendants, including Williams, or claims against Chesapeake that arose after February 9, 2021. Williams continues to believe the claims against Williams are subject to indemnity obligations owed to Williams by Chesapeake.
Rate Matters
On August 30, 2024, Transco filed a general rate case (Docket No. RP24-1035) with the FERC for an overall increase in rates and to comply with the terms of the settlement of its prior rate case to file a rate case no later than August 30, 2024. On September 30, 2024, the FERC issued an order accepting and suspending Transco’s general rate filing to be effective March 1, 2025, subject to refund and the outcome of hearing procedures established by the FERC except that rates for certain services that were proposed as overall rate decreases were accepted, without suspension, to be effective October 1, 2024. The decreased rates will not be subject to refund but may be subject to decrease prospectively under Section 5 of the Natural Gas Act of 1938 as amended.
Construction Litigation
In February 2025, Transco received an adverse judgment related to litigation in the United States Bankruptcy Court for the District of Delaware involving the contractor for the construction of Transco’s Atlantic Sunrise project completed in 2018. The total award to the contractor, estimated at $110 million, included amounts for unpaid invoices, interest, and attorney fees. Management estimates the probable loss from the judgment to be substantially less and Transco has filed a notice of appeal. Transco has capitalized the amount considered probable within noncurrent assets and expects any additional probable loss would also be capitalized. Transco also expects to recover approximately 29 percent of any amount paid from the counterparty on the project.
Environmental Matters
Williams
Williams is a participant in certain environmental activities in various stages including assessment studies, cleanup operations, and/or remedial processes at certain sites, some of which Williams currently does not own. Williams is monitoring these sites in a coordinated effort with other potentially responsible parties, the U.S. Environmental Protection Agency (EPA), or other governmental authorities. Williams is jointly and severally liable along with unrelated third parties in some of these activities and solely responsible in others. Certain of Williams’
subsidiaries have been identified as potentially responsible parties at various Superfund and state waste disposal sites. In addition, these subsidiaries have incurred, or are alleged to have incurred, various other hazardous materials removal or remediation obligations under environmental laws. As of December 31, 2024, Williams has accrued liabilities totaling $42 million for these matters, as discussed below. Estimates of the most likely costs of cleanup are generally based on completed assessment studies, preliminary results of studies, or Williams’ experience with other similar cleanup operations. At December 31, 2024, certain assessment studies were still in process for which the ultimate outcome may yield different estimates of most likely costs. Therefore, the actual costs incurred will depend on the final amount, type, and extent of contamination discovered at these sites, the final cleanup standards mandated by the EPA or other governmental authorities, and other factors.
The EPA, other federal agencies, and various state regulatory agencies routinely propose and promulgate new rules, issue updated guidance to rules, or revise existing rules. These rulemakings include, but are not limited to, reviews and updates to the National Ambient Air Quality Standards, and promulgation of rules for new and existing source performance standards for certain equipment emitting volatile organic compound and methane as well as limitations on emissions of greenhouse gas compounds. Williams continuously monitors these regulatory changes and how they may impact its operations. Implementation of new or revised regulations may result in impacts to Williams’ operations and increase the cost of additions to Property, plant, and equipment – net in the balance sheet for both new and existing facilities in affected areas; however, due to regulatory uncertainty on final rule content or guidance and applicability timeframes, Williams is unable to reasonably estimate the cost of these regulatory impacts at this time.
Continuing operations
Williams’ interstate gas pipelines are involved in remediation and monitoring activities related to certain facilities and locations for polychlorinated biphenyls, mercury, and other hazardous substances. These activities have involved the EPA and various state environmental authorities, resulting in Williams’ identification as a potentially responsible party at various Superfund waste sites. At December 31, 2024, Williams has accrued liabilities of $12 million (see Transco and NWP below) for these costs and expect to recover approximately $4 million through rates.
Williams also accrues environmental remediation costs for natural gas underground storage facilities, primarily related to soil and groundwater contamination. At December 31, 2024, Williams has accrued liabilities totaling $7 million for these costs.
Former operations
Williams has potential obligations in connection with assets and businesses it no longer operates. These potential obligations include remediation activities at the direction of federal and state environmental authorities and the indemnification of the purchasers of certain of these assets and businesses for environmental and other liabilities existing at the time the sale was consummated. At December 31, 2024, Williams has accrued environmental liabilities of $23 million related to these matters.
Transco
Transco has had studies underway for many years to test some of its facilities for the presence of toxic and hazardous substances such as polychlorinated biphenyls (PCBs) and mercury to determine to what extent, if any, remediation may be necessary. Transco has also similarly evaluated past on-site disposal of hydrocarbons at a number of its facilities. Transco has worked closely with and responded to data requests from the EPA and state agencies regarding such potential contamination of certain of their sites. Transco is conducting environmental assessments and implementing a variety of remedial measures that may result in increases or decreases in the total estimated costs. Transco also has a program for monitoring certain environmental activities at their Eminence storage facility. At December 31, 2024, Transco has accrued liabilities of approximately $11 million for the expected ongoing remediation and monitoring costs.
Transco has been identified as a potentially responsible party (PRP) at various Superfund and state waste disposal sites. Based on present volumetric estimates and other factors, their estimated aggregate exposure for remediation of these sites is less than $1 million. The estimated remediation costs for all of these sites are included in the environmental liabilities discussed above. Liability under the Comprehensive Environmental Response, Compensation and Liability Act and applicable state law can be joint and several with other PRPs. Although volumetric allocation is a factor in assessing liability, it is not necessarily determinative; thus, the ultimate liability could be substantially greater than the amounts described above.
Transco considers prudently incurred environmental assessment and remediation costs and the costs associated with compliance with environmental standards to be recoverable through rates. Historically, with limited exceptions, it has been permitted recovery of environmental costs, and it is Transco’s intent to continue seeking recovery of such costs through future rate filings.
NWP
Beginning in the mid-1980s, NWP evaluated many of its facilities for the presence of toxic and hazardous substances to determine to what extent, if any, remediation might be necessary. NWP identified PCB contamination in air compressor systems, soils, and related properties at certain compressor station sites. Similarly, it identified hydrocarbon impacts at these facilities due to the former use of earthen pits, lubricating oil leaks or spills, and excess pipe coating released to the environment. In addition, heavy metals have been identified at these sites due to the former use of mercury containing meters and paint and welding rods containing lead, cadmium, and arsenic. The PCBs were remediated pursuant to a Consent Decree with the EPA in the late 1980s, and NWP conducted a voluntary clean-up of the hydrocarbon and mercury impacts in the early 1990s. In 2005, the Washington Department of Ecology required NWP to re-evaluate previous clean-ups in Washington. During 2006 to 2015, 129 meter stations were evaluated, of which 82 required remediation. As of December 31, 2024, two meter stations are still being remediated. During 2006 to 2018, 14 compressor stations were evaluated, of which 11 required remediation. As of December 31, 2024, four compressor stations are still being remediated. NWP had accrued liabilities totaling approximately $1 million at December 31, 2024 for the ongoing remediation. NWP is conducting environmental assessments and implementing a variety of remedial measures that may result in increases or decreases in the total estimated costs.
Environmental expenditures are expensed or capitalized depending on their future economic benefit and potential for rate recovery. NWP believes that, with respect to any expenditures required to meet applicable standards and regulations, the FERC would grant the requisite rate relief so that substantially all of such expenditures would be permitted to be recovered through rates.
Washington State Climate Commitment Act
In 2021, the state of Washington passed its Climate Commitment Act establishing a market-based cap-and-invest program to reduce carbon emissions. This program took effect on January 1, 2023, and sets a limit, or cap, on overall carbon emissions in the state and requires businesses like NWP to obtain allowances equal to their annual covered carbon emissions. The state’s cap will be reduced over time to meet the state’s carbon emissions reduction targets, which means fewer carbon emissions allowances will be available to purchase each year. These allowances can be purchased through quarterly auctions hosted by the state or bought and sold on a secondary market. In 2023, NWP began purchasing allowances for the carbon emissions from nine of its thirteen compressor stations within the state whose annual carbon emissions have exceeded 25,000 metric tons of carbon dioxide equivalent at least once since 2015. NWP also began purchasing allowances for NWP’s delivery of natural gas to certain of their customers and certain of their facilities in the state whose annual carbon emissions are insufficient to require their direct participation in the program. NWP’s latest rate case settlement allows them to recover the costs of purchasing allowances under the program in their next rate case.
At December 31, 2024 and December 31, 2023, a total of $38 million and $22 million, respectively, were included in Regulatory assets in NWP’s Balance Sheet and was comprised of the cost of the purchased allowances
held, the estimated difference between the allowances held and the allowances required, and the interest income component of the regulatory asset. At December 31, 2024 and December 31, 2023, $3 million and $4 million, respectively, were recorded in Other current liabilities on NWP’s Balance Sheet as the estimated difference. Interest income of $2 million for the year ended December 31, 2024 and $1 million for the year ended December 31, 2023 is reflected in Other income (expense) – net in NWP’s Statement of Net Income.
Other Divestiture Indemnifications
Pursuant to various purchase and sale agreements relating to divested businesses and assets, Williams has indemnified certain purchasers against liabilities that they may incur with respect to the businesses and assets acquired. The indemnities provided to the purchasers are customary in sale transactions and are contingent upon the purchasers incurring liabilities that are not otherwise recoverable from third parties.
At December 31, 2024, other than as previously disclosed, Williams is not aware of any material claims against it involving the above-described indemnities. Any claim for indemnity brought against Williams in the future may have a material adverse effect on Williams’ results of operations in the period in which the claim is made.
In addition to the foregoing, various other proceedings are pending against Williams that are incidental to its operations, none of which are expected to be material to Williams’ expected future annual results of operations, liquidity, and financial position.
Summary
Williams, Transco and NWP have disclosed estimated ranges of reasonably possible losses for certain matters above, as well as all significant matters for which they are unable to reasonably estimate a range of possible loss. Williams, Transco and NWP estimate that for all other matters for which they are able to reasonably estimate a range of loss, the aggregate reasonably possible losses beyond amounts accrued are immaterial to expected future annual results of operations, liquidity, and financial position. These calculations have been made without consideration of any potential recovery from third parties.
Commitments
Commitments for Gas & NGL Marketing Services pipeline transportation capacity and storage capacity are approximately $954 million at December 31, 2024.
Commitments for construction and acquisition of property, plant, and equipment for Williams, Transco, and NWP are approximately $155 million, $2 million, and less than $1 million, respectively at December 31, 2024.

v3.25.0.1

Segment Disclosures
12 Months Ended

Dec. 31, 2024

Segment Reporting [Abstract]

Segment Disclosures [Text Block]
Note 19 – Segment Disclosures
Williams
Williams’ reportable segments are Transmission & Gulf of America, Northeast G&P, West, and Gas & NGL Marketing Services. All remaining business activities are included in Other. (See Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies.)
Performance Measurement
Williams’ chief operating decision maker is the Chief Executive Officer. Williams' chief operating decision maker primarily utilizes Modified EBITDA, its measure of segment profit and loss, to evaluate performance and make decisions on capital allocation and human resources. Such evaluation includes periodic comparisons of actual performance versus historical and budget, as well as projections of Modified EBITDA.
Williams defines Modified EBITDA as follows:
•Income (loss) before income taxes from continuing operations before:
◦Depreciation and amortization expenses;
◦Equity earnings (losses);
◦Other investing income (loss) – net;
◦Interest expense; and
◦Accretion expense associated with AROs for nonregulated operations.
•This measure is further adjusted to include Williams’ proportionate share (based on ownership interest) of Modified EBITDA from its equity-method investments calculated consistently with the definition described above.
Significant noncash items which are components of Modified EBITDA may include net unrealized gain (loss) from commodity derivatives within Total revenues, net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses for Williams’ Gas & NGL Marketing Services segment, charges associated with lower of cost or net realizable value adjustments to the Gas & NGL Marketing Services segment inventory within Product sales (for natural gas marketing inventory as these sales are presented net of the related costs) and Product costs (for NGL marketing inventory), and impairments of certain assets within Other (income) expense – net within Operating income (loss).
Intersegment Service revenues primarily represent transportation services provided to Williams’ marketing business and gathering services provided to its oil and gas properties. Intersegment Product sales primarily represent the sale of natural gas and NGLs from Williams’ natural gas processing plants and its oil and gas properties to its marketing business.
Segment assets include Investments, Property, plant, and equipment – net, and Intangible assets – net of accumulated amortization.
The following tables present revenues, Modified EBITDA, significant expenses, and certain segment assets measures, as well as reconciliations to the consolidated totals:
Transmission & Gulf of America Northeast G&P West Gas & NGL Marketing Services (1) Total
(Millions)
2024
Segment revenues:
Service revenues
External $ 4,157 $ 1,900 $ 1,558 $ — $ 7,615
Internal 89 13 160 — 262
Total service revenues 4,246 1,913 1,718 — 7,877
Total service revenues – commodity consideration 54 2 78 — 134
Product sales
External 144 24 178 2,500 2,846
Internal 184 86 691 (448) 513
Total product sales 328 110 869 2,052 3,359
Net gain (loss) from commodity derivatives
Realized — — 4 72 76
Unrealized — — — (335) (335)
Total net gain (loss) from commodity derivatives (2) — — 4 (263) (259)
Total revenues of reportable segments $ 4,628 $ 2,025 $ 2,669 $ 1,789 $ 11,111
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities 470
Net unrealized gain (loss) from commodity derivatives for upstream operations
(26)
Eliminations (1,052)
Total consolidated revenues $ 10,503
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses (329) (88) (844) (1,799)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses — — — (6)
Operating and administrative expenses (3)
(1,104) (441) (591) (108)
Recoverable power, transportation, and storage costs (4)
(250) (143) (49) —
Other segment income (expenses) - net (5)
155 3 (5) —
Proportional Modified EBITDA of equity-method investments 173 602 132 —
Modified EBITDA of reportable segments $ 3,273 $ 1,958 $ 1,312 $ (124) $ 6,419
Modified EBITDA from upstream operations, corporate, and other business activities 237
Total consolidated Modified EBITDA $ 6,656
Reconciliation of Modified EBITDA:
Depreciation and amortization expenses $ (2,219)
Equity earnings (losses) 560
Other investing income (loss) - net 343
Interest expense (1,364)
Accretion expense associated with AROs for nonregulated operations
(81)
Proportional Modified EBITDA of equity-method investments (909)
Income (loss) before income taxes from continuing operations $ 2,986
Equity-method investments by reportable segment $ 272 $ 3,346 $ 476 $ — $ 4,094
Other equity-method investments
13
Total equity-method investments $ 4,107
Segment assets $ 23,149 $ 12,918 $ 12,144 $ 46 $ 48,257
Total current assets 2,661
Regulatory assets, deferred charges, and noncurrent assets 1,830
Assets of upstream operations, corporate, and other business activities 1,784
Total assets $ 54,532
Additions to long-lived segment assets
$ 4,399 $ 210 $ 529 $ 2 $ 5,140
Additions to long-lived assets of upstream operations, corporate, and other business activities
458
Total additions to long-lived assets
$ 5,598
Transmission & Gulf of America Northeast G&P West Gas & NGL Marketing Services (1) Total
(Millions)
2023
Segment revenues:
Service revenues
External $ 3,766 $ 1,868 $ 1,376 $ 1 $ 7,011
Internal 92 28 126 — 246
Total service revenues 3,858 1,896 1,502 1 7,257
Total service revenues – commodity consideration 38 5 103 — 146
Product sales
External 146 34 80 2,382 2,642
Internal 106 98 361 (322) 243
Total product sales 252 132 441 2,060 2,885
Net gain (loss) from commodity derivatives
Realized 2 — 89 115 206
Unrealized — — — 702 702
Total net gain (loss) from commodity derivatives (2) 2 — 89 817 908
Total revenues of reportable segments
$ 4,150 $ 2,033 $ 2,135 $ 2,878 $ 11,196
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities 505
Net unrealized gain (loss) from commodity derivatives for upstream operations
1
Eliminations (795)
Total consolidated revenues $ 10,907
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses (259) (125) (517) (1,786)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses — — — (43)
Operating and administrative expenses (3)
(1,034) (424) (502) (98)
Recoverable power, transportation, and storage costs (4)
(241) (132) (37) —
Other segment income (expenses) - net (5)
118 (10) (3) (1)
Gain on sale of business (6)
129 — — —
Proportional Modified EBITDA of equity-method investments 205 574 162 —
Modified EBITDA of reportable segments $ 3,068 $ 1,916 $ 1,238 $ 950 $ 7,172
Modified EBITDA from upstream operations, corporate, and other business activities 307
Unallocated Net gain from Energy Transfer litigation judgment (7)
534
Total consolidated Modified EBITDA $ 8,013
Reconciliation of Modified EBITDA:
Depreciation and amortization expenses $ (2,071)
Equity earnings (losses) 589
Other investing income (loss) - net 108
Interest expense (1,236)
Accretion expense associated with AROs for nonregulated operations
(59)
Proportional Modified EBITDA of equity-method investments (939)
Income (loss) before income taxes from continuing operations $ 4,405
Equity-method investments by reportable segment $ 652 $ 3,477 $ 477 $ — $ 4,606
Other equity-method investments
8
Total equity-method investments $ 4,614
Segment assets $ 19,705 $ 13,319 $ 12,188 $ 77 $ 45,289
Total current assets 4,513
Regulatory assets, deferred charges, and noncurrent assets 1,573
Assets of upstream operations, corporate, and other business activities 1,252
Total assets $ 52,627
Additions to long-lived segment assets
$ 2,501 $ 340 $ 1,186 $ 7 $ 4,034
Additions to long-lived assets of upstream operations, corporate, and other business activities
279
Total additions to long-lived assets
$ 4,313
Transmission & Gulf of America Northeast G&P West Gas & NGL Marketing Services (1) Total
(Millions)
2022
Segment revenues:
Service revenues
External $ 3,461 $ 1,613 $ 1,443 $ 3 $ 6,520
Internal 118 41 99 — 258
Total service revenues 3,579 1,654 1,542 3 6,778
Total service revenues – commodity consideration 64 14 182 — 260
Product sales
External 228 28 145 4,052 4,453
Internal 176 106 696 (518) 460
Total product sales 404 134 841 3,534 4,913
Net gain (loss) from commodity derivatives
Realized — — (4) 17 13
Unrealized — — — (321) (321)
Total net gain (loss) from commodity derivatives (2) — — (4) (304) (308)
Total revenues of reportable segments
$ 4,047 $ 1,802 $ 2,561 $ 3,233 $ 11,643
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities 626
Net unrealized gain (loss) from commodity derivatives for upstream operations
25
Eliminations (1,329)
Total consolidated revenues $ 10,965
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses (425) (138) (918) (3,228)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses — — — 47
Operating and administrative expenses (3)
(906) (384) (507) (96)
Recoverable power, transportation, and storage costs (4)
(254) (132) (43) —
Other segment income (expenses) - net (5)
19 (6) (14) 4
Proportional Modified EBITDA of equity-method investments 193 654 132 —
Modified EBITDA of reportable segments $ 2,674 $ 1,796 $ 1,211 $ (40) $ 5,641
Modified EBITDA from upstream operations, corporate, and other business activities 434
Total consolidated Modified EBITDA $ 6,075
Reconciliation of Modified EBITDA:
Depreciation and amortization expenses $ (2,009)
Equity earnings (losses) 637
Other investing income (loss) - net 16
Interest expense (1,147)
Accretion expense associated with AROs for nonregulated operations
(51)
Proportional Modified EBITDA of equity-method investments (979)
Income (loss) before income taxes from continuing operations $ 2,542
Equity-method investments by reportable segment $ 629 $ 3,566 $ 843 $ — $ 5,038
Other equity-method investments
10
Total equity-method investments $ 5,048
Segment assets $ 17,795 $ 13,539 $ 10,710 $ 130 $ 42,174
Total current assets 3,797
Regulatory assets, deferred charges, and noncurrent assets 1,319
Assets of upstream operations, corporate, and other business activities 1,143
Total assets $ 48,433
Additions to long-lived segment assets
$ 1,420 $ 261 $ 1,507 $ 4 $ 3,192
Additions to long-lived assets of upstream operations, corporate, and other business activities
406
Total additions to long-lived assets
$ 3,598
_______________________
(1)    As Williams is acting as agent for natural gas marketing customers or engages in energy trading activities, the resulting revenues are presented net of the related costs of those activities.
(2)    Williams records transactions that qualify as commodity derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses from commodity derivatives held for energy trading purposes are presented on a net basis in revenue.
(3)     Segment operating and administrative expenses primarily include payroll, maintenance and operating costs and taxes, and general and administrative expenses, including acquisition and transition-related expenses. It also includes project execution, information technology, finance and accounting, real estate and aviation, central engineering services, safety and operational discipline, supply chain and digital transformation, corporate strategic development, human resources, legal and government affairs, and executive and audit support services costs which are centrally managed and allocated to segments.
(4)     Recoverable power, transportation and storage costs are charges incurred which are reimbursable pursuant to FERC stipulations or customer contracts.
(5)    Other segment income (expenses) primarily includes equity AFUDC and regulatory credits and charges related to Williams’ regulated operations.
(6)    Gain on sale of business reflects a gain recognized on the sale of certain liquids pipelines in the Gulf Coast region in September 2023 (see Note 3 – Acquisitions and Divestitures).
(7)    Net gain from Energy Transfer litigation judgment resulted from a favorable ruling in November 2023 (see Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies).
Transco
Transco manages and evaluates its business as a single reportable segment. Transco’s chief operating decision maker is the Senior Vice President, Transmission & Gulf of America. Transco’s chief operating decision maker determines resource allocation, measures and evaluates segment operating performance based upon Net income (loss) as reported on the Statement of Net Income.
Significant expenses within net income, include Operating and maintenance expenses and Selling, general, and administrative expenses, which are each separately presented on Transco’s Statement of Net Income. Other segment items within net income include natural gas product costs, depreciation and amortization expense, taxes, other than income taxes, interest expense, interest income, other income (expense) – net, and AFUDC.
Transco’s segment assets include Property, plant, and equipment – net as presented on the Balance Sheet.
NWP
NWP manages and evaluates its business as a single reportable segment. NWP’s chief operating decision maker is the Senior Vice President, Transmission & Gulf of America. NWP’s chief operating decision maker determines resource allocation, measures and evaluates segment operating performance based upon Net income (loss) as reported on the Statement of Net Income.
Significant expenses within net income, include Operating and maintenance expenses and Selling, general, and administrative expenses, which are each separately presented on NWP’s Statement of Net Income. Other segment items within net income include depreciation and amortization expense, taxes, other than income taxes, interest expense, other income (expense) – net, and AFUDC.
NWP’s segment assets include Property, plant, and equipment – net as presented on the Balance Sheet.

v3.25.0.1

Subsequent Events
12 Months Ended

Dec. 31, 2024

Subsequent Events [Abstract]

Subsequent Events [Text Block]
Note 20 – Subsequent Events
Quarterly Dividends to Common Stockholders
On January 28, 2025, Williams’ board of directors approved a regular quarterly dividend to common stockholders of $0.500 per share payable on March 31, 2025.
Long-term Debt Issuance and Retirement
In January 2025, Williams issued $1 billion of 5.6 percent senior unsecured notes due March 15, 2035 and $500 million of 6.0 percent senior unsecured notes due March 15, 2055 (see Note 13 – Debt and Banking Arrangements). Also in January 2025, Williams retired $750 million of senior unsecured debt.

v3.25.0.1

Schedule II - Valuation and Qualifying Accounts
12 Months Ended

Dec. 31, 2024

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts [Text Block]
The Williams Companies, Inc.
Schedule II — Valuation and Qualifying Accounts

Additions
Beginning
Balance Charged
(Credited)
To Costs and
Expenses Other Deductions Ending
Balance
(Millions)
2024
Deferred tax asset valuation allowance (1)
$ 183 $ (92) $ — $ — $ 91
2023
Deferred tax asset valuation allowance (1)
200 (17) — — 183
2022
Deferred tax asset valuation allowance (1)
297 (97) — — 200
__________
(1) Deducted from related assets.

v3.25.0.1

Pay vs Performance Disclosure - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Pay vs Performance Disclosure

Net income $ 2,225 $ 3,179 $ 2,049

v3.25.0.1

Insider Trading Arrangements
3 Months Ended

Dec. 31, 2024

Trading Arrangements, by Individual

Rule 10b5-1 Arrangement Adopted false

Non-Rule 10b5-1 Arrangement Adopted false

Rule 10b5-1 Arrangement Terminated false

Non-Rule 10b5-1 Arrangement Terminated false

v3.25.0.1

Insider Trading Policies and Procedures
12 Months Ended

Dec. 31, 2024

Insider Trading Policies and Procedures [Line Items]

Insider Trading Policies and Procedures Adopted true

v3.25.0.1

Cybersecurity Risk Management and Strategy Disclosure
12 Months Ended

Dec. 31, 2024

Cybersecurity Risk Management, Strategy, and Governance [Line Items]

Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]
Item 1C. Cybersecurity
Management for Williams, Transco, and NWP recognizes the increasing volume and sophistication of cyber threats and takes its responsibility to protect the information and systems under its purview seriously. Management’s cybersecurity processes aim to provide a comprehensive approach to assess, identify, and manage material risks arising from these cybersecurity threats.
Comprehensive Cybersecurity Program: Management has implemented a comprehensive cybersecurity risk management program (Cybersecurity Program) that is aligned with the National Institute for Standards and Technology Cybersecurity Framework. The Cybersecurity Program provides a risk-based approach to cybersecurity, and security controls are tailored so that cost-effective controls can be applied commensurate with the risk and sensitivity of specific information systems, control systems, and enterprise data. The Cybersecurity Program incorporates best practices and industry standards from multiple sources and is designed to comply with applicable regulations. The Cybersecurity Program includes, but is not limited to, the following elements: risk assessment, policies and procedures, contract management, training and awareness, auditing, compliance monitoring and testing, table-top exercises, and incident response.
Integration with Overall Risk Management: Management’s cybersecurity processes have been integrated into overall risk management system and processes. Management considers cybersecurity threat risks alongside other Company risks as part of its overall risk assessment process. Cybersecurity risk professionals collaborate with subject matter specialists, as necessary, to gather insights for identifying and assessing material cybersecurity threat risks, their severity, and potential mitigations.
Engagement of Third Parties: Management often engages with specialized third-party assessors, consultants, auditors, and other experts to review, validate, and enhance its cybersecurity practices. Third-party independent assessments provide an external perspective on management’s cybersecurity posture, allowing it to leverage best practices from the industry and ensure its defenses remain robust. All third parties engaged for such processes are subjected to rigorous scrutiny to ensure the third parties meet management’s security standards.
Oversight of Third-party Service Providers: Management acknowledges the potential risks associated with the use of third-party service providers. Therefore, management has established processes to oversee and identify material cybersecurity risks that may be associated with third-party service providers with whom it engages. This includes conducting thorough, risk-based due diligence before onboarding, performing security assessments, and confirming adherence to management’s cybersecurity requirements. Management also maintains active communication channels with these providers to stay informed about any potential security incidents or concerns.
Disclosure of Risks: Management describes how risks from cybersecurity threats could materially affect its business strategy, results of operations, or financial condition, as part of its risk factor disclosures at Part I, Item 1A of this Annual Report on Form 10-K.
Management is committed to continually enhancing its cybersecurity processes and practices to address the dynamic nature of the threats it faces and to ensure the security and integrity of its systems and data.
Cybersecurity Governance
Cybersecurity is an important part of the risk management processes and an area of focus for the Board of Directors and management. Each member of Williams’ organization, which includes Transco and NWP, from facility operators to board members, has a responsibility to safeguard the organization’s cybersecurity. The Chief Information Security Officer (CISO) is responsible for the cybersecurity strategy and execution, while the Board and the Audit Committee are responsible for oversight of cybersecurity risk.
The Cybersecurity Governance Committee is led by the CISO and includes cybersecurity managers and other subject matter experts as standing members. The Cybersecurity Governance Committee is tasked with developing, implementing, and maintaining the Cybersecurity Program. The Cybersecurity Executive Advisory Board (Executive Advisory Board) is led by the CISO, with the Chief Information Officer (CIO), Chief Financial Officer, Chief Human Resources Officer, the General Counsel, and the Chief Operations Officer as standing members. The Executive Advisory Board’s purpose is to ensure enterprise alignment with the Cybersecurity Program and provide executive oversight of the Cybersecurity Program.
The Board of Directors oversees cybersecurity-related policy and strategy. As part of this oversight, the CISO provides a cybersecurity dashboard that is reviewed by the Board at every regularly scheduled Board meeting, which includes key performance indicators for cybersecurity process maturity, operational performance, and enterprise performance toward Transportation Security Administration (TSA) compliance. Additionally, the CIO and/or CISO presents to the Board bi-annually regarding the cybersecurity risks and strategies, including as part of the Board’s annual long-term strategy session. The Audit Committee, comprised of independent directors, reviews the implementation and effectiveness of cybersecurity risk management protocols and reviews the effectiveness of cybersecurity as part of the Company’s accounting and internal control policies. As part of this oversight, the CIO presents to the Audit Committee bi-annually, as well as periodically in conjunction with any internal audits related to cybersecurity. Additionally, management has protocols by which cybersecurity incidents that meet established reporting thresholds are escalated internally and, where appropriate, are reported to the Board, as well as ongoing updates regarding any such incident until it has been addressed.
Williams’ new CIO joined the company in February 2025, and will succeed the company’s retiring CIO, who is retiring in March 2025. The new CIO brings over 20 years of experience in information technology and leadership within the energy industry and has extensive expertise in digital transformation, cloud strategies, enterprise AI initiatives, and cybersecurity, as well as managing large-scale system implementations and integrations. He holds an Executive MBA from the University of Texas at San Antonio, a Master of Computer Science and Engineering from the University of Texas at Arlington, and a Bachelor of Information Science and Engineering from Bangalore University.
The retiring CIO had been in his role at Williams for over 10 years and had over 30 years of combined information technology experience with a broad scope of responsibility. He provided senior leadership support of the cybersecurity and risk management programs since 2013. He holds a bachelor’s degree in management information systems (MIS) from the University of Oklahoma and a Master of Business Administration in MIS from the University of Dallas.
The CISO has been at Williams for over 25 years. During that time, he has held a variety of information technology positions at multiple levels in the organization ranging from network engineering to application development and project management, as well as several IT Manager and Director roles. He has had oversight of the cybersecurity and risk management programs since 2017. Active in government and private sector partnerships, he is currently serving as the Chair of Emergency Response Working Group under the Oil & Natural Gas Subsector Coordinating Council and recently acted as the Chair of the Interstate Natural Gas Association of America security committee. He holds degrees in Business Administration and MIS from the University of Oklahoma and is certified in Leadership from Harvard Business School’s executive education. In 2018, he obtained his Chief Information Security Officer certification from Carnegie Mellon University.

Cybersecurity Risk Management Processes Integrated [Flag] true

Cybersecurity Risk Management Processes Integrated [Text Block] Integration with Overall Risk Management: Management’s cybersecurity processes have been integrated into overall risk management system and processes. Management considers cybersecurity threat risks alongside other Company risks as part of its overall risk assessment process. Cybersecurity risk professionals collaborate with subject matter specialists, as necessary, to gather insights for identifying and assessing material cybersecurity threat risks, their severity, and potential mitigations.

Cybersecurity Risk Management Third Party Engaged [Flag] true

Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] true

Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] false

Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]
Disclosure of Risks: Management describes how risks from cybersecurity threats could materially affect its business strategy, results of operations, or financial condition, as part of its risk factor disclosures at Part I, Item 1A of this Annual Report on Form 10-K.
Management is committed to continually enhancing its cybersecurity processes and practices to address the dynamic nature of the threats it faces and to ensure the security and integrity of its systems and data.

Cybersecurity Risk Board of Directors Oversight [Text Block]
Cybersecurity Governance
Cybersecurity is an important part of the risk management processes and an area of focus for the Board of Directors and management. Each member of Williams’ organization, which includes Transco and NWP, from facility operators to board members, has a responsibility to safeguard the organization’s cybersecurity. The Chief Information Security Officer (CISO) is responsible for the cybersecurity strategy and execution, while the Board and the Audit Committee are responsible for oversight of cybersecurity risk.
The Cybersecurity Governance Committee is led by the CISO and includes cybersecurity managers and other subject matter experts as standing members. The Cybersecurity Governance Committee is tasked with developing, implementing, and maintaining the Cybersecurity Program. The Cybersecurity Executive Advisory Board (Executive Advisory Board) is led by the CISO, with the Chief Information Officer (CIO), Chief Financial Officer, Chief Human Resources Officer, the General Counsel, and the Chief Operations Officer as standing members. The Executive Advisory Board’s purpose is to ensure enterprise alignment with the Cybersecurity Program and provide executive oversight of the Cybersecurity Program.
The Board of Directors oversees cybersecurity-related policy and strategy. As part of this oversight, the CISO provides a cybersecurity dashboard that is reviewed by the Board at every regularly scheduled Board meeting, which includes key performance indicators for cybersecurity process maturity, operational performance, and enterprise performance toward Transportation Security Administration (TSA) compliance. Additionally, the CIO and/or CISO presents to the Board bi-annually regarding the cybersecurity risks and strategies, including as part of the Board’s annual long-term strategy session. The Audit Committee, comprised of independent directors, reviews the implementation and effectiveness of cybersecurity risk management protocols and reviews the effectiveness of cybersecurity as part of the Company’s accounting and internal control policies. As part of this oversight, the CIO presents to the Audit Committee bi-annually, as well as periodically in conjunction with any internal audits related to cybersecurity. Additionally, management has protocols by which cybersecurity incidents that meet established reporting thresholds are escalated internally and, where appropriate, are reported to the Board, as well as ongoing updates regarding any such incident until it has been addressed.
Williams’ new CIO joined the company in February 2025, and will succeed the company’s retiring CIO, who is retiring in March 2025. The new CIO brings over 20 years of experience in information technology and leadership within the energy industry and has extensive expertise in digital transformation, cloud strategies, enterprise AI initiatives, and cybersecurity, as well as managing large-scale system implementations and integrations. He holds an Executive MBA from the University of Texas at San Antonio, a Master of Computer Science and Engineering from the University of Texas at Arlington, and a Bachelor of Information Science and Engineering from Bangalore University.
The retiring CIO had been in his role at Williams for over 10 years and had over 30 years of combined information technology experience with a broad scope of responsibility. He provided senior leadership support of the cybersecurity and risk management programs since 2013. He holds a bachelor’s degree in management information systems (MIS) from the University of Oklahoma and a Master of Business Administration in MIS from the University of Dallas.
The CISO has been at Williams for over 25 years. During that time, he has held a variety of information technology positions at multiple levels in the organization ranging from network engineering to application development and project management, as well as several IT Manager and Director roles. He has had oversight of the cybersecurity and risk management programs since 2017. Active in government and private sector partnerships, he is currently serving as the Chair of Emergency Response Working Group under the Oil & Natural Gas Subsector Coordinating Council and recently acted as the Chair of the Interstate Natural Gas Association of America security committee. He holds degrees in Business Administration and MIS from the University of Oklahoma and is certified in Leadership from Harvard Business School’s executive education. In 2018, he obtained his Chief Information Security Officer certification from Carnegie Mellon University.

Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] The Cybersecurity Governance Committee is led by the CISO and includes cybersecurity managers and other subject matter experts as standing members. The Cybersecurity Governance Committee is tasked with developing, implementing, and maintaining the Cybersecurity Program. The Cybersecurity Executive Advisory Board (Executive Advisory Board) is led by the CISO, with the Chief Information Officer (CIO), Chief Financial Officer, Chief Human Resources Officer, the General Counsel, and the Chief Operations Officer as standing members. The Executive Advisory Board’s purpose is to ensure enterprise alignment with the Cybersecurity Program and provide executive oversight of the Cybersecurity Program.

Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]
The Board of Directors oversees cybersecurity-related policy and strategy. As part of this oversight, the CISO provides a cybersecurity dashboard that is reviewed by the Board at every regularly scheduled Board meeting, which includes key performance indicators for cybersecurity process maturity, operational performance, and enterprise performance toward Transportation Security Administration (TSA) compliance. Additionally, the CIO and/or CISO presents to the Board bi-annually regarding the cybersecurity risks and strategies, including as part of the Board’s annual long-term strategy session. The Audit Committee, comprised of independent directors, reviews the implementation and effectiveness of cybersecurity risk management protocols and reviews the effectiveness of cybersecurity as part of the Company’s accounting and internal control policies. As part of this oversight, the CIO presents to the Audit Committee bi-annually, as well as periodically in conjunction with any internal audits related to cybersecurity. Additionally, management has protocols by which cybersecurity incidents that meet established reporting thresholds are escalated internally and, where appropriate, are reported to the Board, as well as ongoing updates regarding any such incident until it has been addressed.

Cybersecurity Risk Role of Management [Text Block] Cybersecurity is an important part of the risk management processes and an area of focus for the Board of Directors and management. Each member of Williams’ organization, which includes Transco and NWP, from facility operators to board members, has a responsibility to safeguard the organization’s cybersecurity. The Chief Information Security Officer (CISO) is responsible for the cybersecurity strategy and execution, while the Board and the Audit Committee are responsible for oversight of cybersecurity risk.

Cybersecurity Risk Management Positions or Committees Responsible [Flag] true

Cybersecurity Risk Management Positions or Committees Responsible [Text Block] The Chief Information Security Officer (CISO) is responsible for the cybersecurity strategy and execution, while the Board and the Audit Committee are responsible for oversight of cybersecurity risk. The Cybersecurity Governance Committee is led by the CISO and includes cybersecurity managers and other subject matter experts as standing members. The Cybersecurity Governance Committee is tasked with developing, implementing, and maintaining the Cybersecurity Program. The Cybersecurity Executive Advisory Board (Executive Advisory Board) is led by the CISO, with the Chief Information Officer (CIO), Chief Financial Officer, Chief Human Resources Officer, the General Counsel, and the Chief Operations Officer as standing members. The Executive Advisory Board’s purpose is to ensure enterprise alignment with the Cybersecurity Program and provide executive oversight of the Cybersecurity Program.

Cybersecurity Risk Management Expertise of Management Responsible [Text Block]
Williams’ new CIO joined the company in February 2025, and will succeed the company’s retiring CIO, who is retiring in March 2025. The new CIO brings over 20 years of experience in information technology and leadership within the energy industry and has extensive expertise in digital transformation, cloud strategies, enterprise AI initiatives, and cybersecurity, as well as managing large-scale system implementations and integrations. He holds an Executive MBA from the University of Texas at San Antonio, a Master of Computer Science and Engineering from the University of Texas at Arlington, and a Bachelor of Information Science and Engineering from Bangalore University.
The retiring CIO had been in his role at Williams for over 10 years and had over 30 years of combined information technology experience with a broad scope of responsibility. He provided senior leadership support of the cybersecurity and risk management programs since 2013. He holds a bachelor’s degree in management information systems (MIS) from the University of Oklahoma and a Master of Business Administration in MIS from the University of Dallas.
The CISO has been at Williams for over 25 years. During that time, he has held a variety of information technology positions at multiple levels in the organization ranging from network engineering to application development and project management, as well as several IT Manager and Director roles. He has had oversight of the cybersecurity and risk management programs since 2017. Active in government and private sector partnerships, he is currently serving as the Chair of Emergency Response Working Group under the Oil & Natural Gas Subsector Coordinating Council and recently acted as the Chair of the Interstate Natural Gas Association of America security committee. He holds degrees in Business Administration and MIS from the University of Oklahoma and is certified in Leadership from Harvard Business School’s executive education. In 2018, he obtained his Chief Information Security Officer certification from Carnegie Mellon University.

Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]
The Board of Directors oversees cybersecurity-related policy and strategy. As part of this oversight, the CISO provides a cybersecurity dashboard that is reviewed by the Board at every regularly scheduled Board meeting, which includes key performance indicators for cybersecurity process maturity, operational performance, and enterprise performance toward Transportation Security Administration (TSA) compliance. Additionally, the CIO and/or CISO presents to the Board bi-annually regarding the cybersecurity risks and strategies, including as part of the Board’s annual long-term strategy session. The Audit Committee, comprised of independent directors, reviews the implementation and effectiveness of cybersecurity risk management protocols and reviews the effectiveness of cybersecurity as part of the Company’s accounting and internal control policies. As part of this oversight, the CIO presents to the Audit Committee bi-annually, as well as periodically in conjunction with any internal audits related to cybersecurity. Additionally, management has protocols by which cybersecurity incidents that meet established reporting thresholds are escalated internally and, where appropriate, are reported to the Board, as well as ongoing updates regarding any such incident until it has been addressed.

Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] true

v3.25.0.1

General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies (Policies)
12 Months Ended

Dec. 31, 2024

Accounting Policies [Abstract]

Principles of consolidation [Policy Text Block]
Principles of Consolidation
Williams’ consolidated financial statements include the accounts of all entities that Williams controls and its proportionate interest in the accounts of certain ventures in which it owns an undivided interest. Management’s judgment is required to evaluate whether it controls an entity. Key areas of that evaluation include:
•Determining whether an entity is a VIE (see Note 2 – Variable Interest Entities);
•Determining whether Williams is the primary beneficiary of a VIE, including evaluating which activities of a VIE most significantly impact its economic performance and the degree of power that Williams and its related parties have over those activities through its variable interests;
•Identifying events that require reconsideration of whether an entity is a VIE and continuously evaluating whether Williams is a VIE’s primary beneficiary;
•Evaluating whether other owners in entities that are not VIEs are able to effectively participate in significant decisions that would be expected to be made in the ordinary course of business such that Williams does not have the power to control such entities.
Williams applies the equity method of accounting to investments over which it exercises significant influence but does not control. Distributions received from equity-method investees are presented in the Consolidated Statement of Cash Flows according to the nature of the distributions approach, which classifies distributions
received from equity-method investees as either returns on investment (cash inflows from operating activities) or returns of investment (cash inflows from investing activities) based on the nature of the activities of the equity-method investee that generated the distribution.

Use of estimates [Policy Text Block]
Use of Estimates
The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying combined notes. Actual results could differ from those estimates.
Significant estimates and assumptions may include:
•Impairment assessments of investments, property, plant, and equipment, and intangible assets;
•Litigation-related contingencies;
•Environmental remediation obligations;
•Depreciation and amortization of long-lived assets, which are comprised of property, plant, and equipment, and intangible assets;
•Depreciation and/or amortization of equity-method investment basis differences;
•Asset retirement obligations (AROs);
•Measurement of fair value of commodity derivatives;
•Pension and postretirement valuation variables;
•Measurement of regulatory assets and liabilities;
•Measurement of deferred income tax assets and liabilities, including assumptions related to the realization of deferred income tax assets;
•Revenue recognition, including estimates utilized in recognition of deferred revenue;
•Purchase price accounting.
These estimates are discussed further throughout these combined notes.

Regulatory accounting [Policy Text Block]
Regulatory Accounting
Transco, NWP, and MountainWest are regulated by the Federal Energy Regulatory Commission (FERC), and these regulated entities’ rates may also be negotiated with customers pursuant to the terms of tariffs and FERC policy. Therefore, management has determined that it is appropriate under Accounting Standards Codification (ASC) Topic 980, “Regulated Operations,” (ASC 980) that certain costs that would otherwise be charged to expense should be deferred as regulatory assets, based on the expected recovery from customers in future rates. Likewise, certain actual or anticipated credits that would otherwise reduce expense should be deferred as regulatory liabilities, based on the expected return to customers in future rates. Management’s expected recovery of deferred costs and return of deferred credits generally results from specific decisions by regulators granting such ratemaking treatment. Certain incurred costs and obligations are recorded as regulatory assets or liabilities if, based on regulatory orders or other available evidence, it is probable that the costs or obligations will be included in amounts allowable for recovery or refunded in future rates. Accounting for these operations that are regulated can differ from the accounting requirements for nonregulated operations. For example, for regulated operations, allowance for funds used during construction (AFUDC) represents the estimated cost of debt and equity funds applicable to utility plant in the process of construction and is capitalized as a cost of property, plant, and equipment because it constitutes an
actual cost of construction under established regulatory practices; nonregulated operations are only allowed to capitalize the cost of debt funds related to construction activities, while a component for equity is prohibited. Management has determined that for its regulated entities, it is appropriate to apply the accounting prescribed by ASC 980 and, accordingly, the accompanying financial statements include the effects of the types of transactions described above that result from regulatory accounting requirements (see Note 10 – Regulatory Assets and Liabilities).

The FERC has prescribed a formula to be used in computing separate allowances for borrowed and equity AFUDC. These allowances are recorded as follows:

Transco

Year Ended December 31,
2024 2023 2022
(Millions)
Allowance for borrowed funds used during construction $ 17 $ 14 $ 5
Allowance for equity funds used during construction
71 63 23
Allowance for equity and borrowed funds used during construction (AFUDC)
$ 88 $ 77 $ 28
NWP

Year Ended December 31,
2024 2023 2022
(Millions)
Allowance for borrowed funds used during construction $ 2 $ 1 $ 1
Allowance for equity funds used during construction
8 3 2
Allowance for equity and borrowed funds used during construction (AFUDC)
$ 10 $ 4 $ 3

Revenue recognition [Policy Text Block]
Revenue Recognition
Customers in Williams’ gas pipeline businesses, including Transco and NWP, are comprised of public utilities, municipalities, gas marketers and producers, intrastate pipelines, direct industrial users, and electrical power generators. Customers in Williams’ midstream businesses are comprised of oil and natural gas producer counterparties. Customers for Williams’ product sales are comprised of public utilities, gas marketers, and direct industrial users.
Service revenue contracts from Williams’ gas pipeline and midstream businesses, including Transco and NWP, contain a series of distinct services, with the majority of the contracts having a single performance obligation that is satisfied over time as the customer simultaneously receives and consumes the benefits provided. Most of the product sales contracts have a single performance obligation with revenue recognized at a point in time when the products have been sold and delivered to the customer.
Certain customers reimburse Williams for costs it incurs associated with construction of property, plant, and equipment utilized in its operations. For Williams’ rate-regulated gas pipeline businesses, including Transco and NWP, that apply ASC 980, Williams follows FERC guidelines with respect to reimbursement of construction costs. FERC tariffs only allow for cost reimbursement and are non-negotiable in nature; thus, in management’s judgment, the construction activities do not represent an ongoing major and central operation of the gas pipeline businesses and are not within the scope of ASC Topic 606, “Revenue from Contracts with Customers”. Accordingly, cost reimbursements are treated as a reduction to the cost of the constructed asset. For the midstream businesses, reimbursement and service contracts with customers are viewed together as providing the same commercial objective, as Williams has the ability to negotiate the mix of consideration between reimbursements and amounts
billed over time. Accordingly, Williams generally recognizes reimbursements of construction costs from customers on a gross basis as a contract liability separate from the associated costs included within property, plant, and equipment. The contract liability is recognized into service revenues as the underlying performance obligations are satisfied.
Service Revenues
Gas pipeline businesses
Revenues from the regulated interstate natural gas pipeline businesses, including Transco and NWP, which are subject to regulation by certain state and federal authorities, including the FERC, include both firm and interruptible transportation and storage contracts. Firm transportation and storage agreements provide for a daily or monthly reservation charge based on the pipeline or storage capacity reserved, and a commodity charge based on the volume of natural gas delivered/stored, each at rates specified in the FERC tariffs or based on negotiated contractual rates, with contract terms that are generally long-term in nature. Most of the long-term contracts contain an evergreen provision, which allows the contracts to be extended for periods primarily up to one year in length an indefinite number of times following the specified contract term and until terminated generally by either party. Interruptible transportation and storage agreements provide for a volumetric charge based on actual commodity transportation or storage utilized in the period in which those services are provided, and the contracts are generally limited to one-month periods or less. The related performance obligations include the following:
•Firm transportation or storage under firm transportation and storage contracts—an integrated package of services typically constituting a single performance obligation, which includes standing ready to provide such services and receiving, transporting or storing (as applicable), and redelivering commodities;
•Interruptible transportation or storage under interruptible transportation and storage contracts—an integrated package of services typically constituting a single performance obligation once scheduled, which includes receiving, transporting or storing (as applicable), and redelivering commodities.
In situations where, in management’s judgment, it considers the integrated package of services as a single performance obligation, which represents a majority of its interstate natural gas pipeline contracts with customers, management does not consider there to be multiple performance obligations because the nature of the overall promise in the contract is to stand ready (with regard to firm transportation and storage contracts), receive, transport or store, and redeliver natural gas to the customer; therefore, revenue is recognized over time upon satisfaction of the daily stand ready performance obligation.
Revenues are recognized for reservation charges over the performance obligation period, which is the contract term, regardless of the volume of natural gas that is transported or stored. Revenues for commodity charges from both firm and interruptible transportation services and storage services are recognized when natural gas is delivered at the agreed upon delivery point or when natural gas is injected or withdrawn from the storage facility because they specifically relate to efforts to provide these distinct services. Generally, reservation charges and commodity charges in the interstate natural gas pipeline businesses are recognized as revenue in the same period they are invoiced to its customers. As a result of the ratemaking process, certain amounts collected may be subject to refund upon the issuance of final orders by the FERC in pending rate proceedings. Management uses judgment to record estimates of rate refund liabilities considering its and other third-party regulatory proceedings, advice of counsel, and other risks. As of December 31, 2024 and 2023, there were no such rate refund liabilities for Transco and NWP.
Midstream businesses
Revenues from the nonregulated gathering, processing, transportation, and storage midstream businesses include contracts for natural gas gathering, processing, treating, compression, transportation, and other related services with contract terms that are generally long-term in nature and may extend up to the production life of the associated reservoir. Additionally, the midstream businesses generate revenues from fees charged for storing customers’ natural gas and NGLs, generally under prepaid contracted storage capacity contracts. In situations where, in management’s judgment, it provides an integrated package of services combined into a single performance obligation, which represents a majority of this class of contracts with customers, Williams does not consider there to be multiple performance obligations because the nature of the overall promise in the contract is to provide gathering, processing, transportation, storage, and related services resulting in the delivery, or redelivery in the context of storage services, of pipeline-quality natural gas and NGLs to the customer. As such, revenue is recognized at the daily completion of the integrated package of services as the integrated package represents a single performance obligation. Additionally, certain contracts in the midstream businesses contain fixed or upfront payment terms that result in the deferral of revenues until such services have been performed or such capacity has been made available.
Williams also earns revenues from offshore crude oil and natural gas gathering and transportation and offshore production handling. These services represent an integrated package of services and are considered a single distinct performance obligation for which Williams recognizes revenues as the services are provided to the customer.
Williams generally earns a contractually stated fee per unit for the volume of product transported, gathered, processed, or stored. The rate is generally fixed; however, certain contracts contain variable rates that are subject to change based on commodity prices, levels of throughput, or an annual adjustment based on a formulaic cost-of-service calculation. In addition, Williams has contracts with contractually stated fees that decline over the contract term, such as declines based on the passage of time periods or achievement of cumulative throughput amounts. The excess of consideration received over revenue recognized results in the deferral of those amounts until future periods based on a units of production or straight-line methodology as these methods appropriately match the consumption of services provided to the customer. The units of production methodology requires the use of production estimates that are uncertain and the use of judgment when developing estimates of future production volumes, thus impacting the rate of revenue recognition. Production estimates are monitored as circumstances and events warrant. Certain of Williams’ gas gathering and processing agreements have minimum volume commitments (MVC). If a customer under such an agreement fails to meet its MVC for a specified period (thus not exercising all the contractual rights to gathering and processing services within the specified period, herein referred to as “breakage”), it is obligated to pay a contractually determined fee based upon the shortfall between the actual gathered or processed volumes and the MVC for the period contained in the contract. When Williams concludes, based on management’s judgment, it is probable that the customer will not exercise all or a portion of its remaining rights, Williams recognizes revenue associated with such breakage amount in proportion to the pattern of exercised rights within the respective MVC period.
Under keep-whole and percent-of-liquids processing contracts, Williams receives commodity consideration in the form of NGLs and takes title to the NGLs at the tailgate of the plant. Williams recognizes such commodity consideration as service revenue based on the market value of the NGLs retained at the time the processing is provided. The current market value, as opposed to the market value at the contract inception date, is used due to a combination of factors, including the fact that the volume, mix, and market price of NGL consideration to be received is unknown at the time of contract execution and is not specified in Williams’ contracts with customers. Additionally, product sales revenue (discussed below) is recognized upon the sale of the NGLs to a third party based on the sales price at the time of sale. As a result, revenue is recognized in the Consolidated Statement of Income both at the time the processing service is provided in Service revenues – commodity consideration and at the time the NGLs retained as part of the processing service are sold in Product
sales. The recognition of revenue related to commodity consideration has the impact of increasing the book value of NGL inventory, resulting in higher cost of goods sold at the time of sale.
Product Sales
In the course of providing transportation services to customers of the gas pipeline businesses, including Transco, and gathering and processing services to customers of the midstream businesses, different quantities of natural gas may be received from customers than the quantities delivered on behalf of those customers. The resulting imbalances are primarily settled monthly through the purchase or sale of natural gas with each customer under terms provided for in FERC tariffs or gathering and processing agreements, respectively. Revenue is recognized for Transco from the sale of natural gas upon settlement of imbalances (see Gas Imbalances below).
In certain instances, Williams purchases NGLs, crude oil, and natural gas from its oil and natural gas producer customers which Williams remarkets. In addition, Williams retains NGLs as consideration in certain processing arrangements, as discussed above in the Service Revenues - Midstream businesses section. Williams also markets natural gas and NGLs from the production at its upstream properties. Williams recognizes revenue from the sale of these commodities when the products have been sold and delivered. Williams’ product sales contracts are primarily short-term contracts based on prevailing market rates at the time of the transaction.
Williams purchases natural gas for storage when the current market price paid to buy and transport natural gas plus the cost to store and finance the natural gas is less than an estimated, forward market price that can be received in the future, resulting in positive net product sales. Commodity-based exchange-traded futures contracts and over-the-counter (OTC) contracts are used to sell natural gas at that future price to substantially protect the natural gas revenues that will ultimately be realized when the stored natural gas is sold. Additionally, Williams enters into transactions to secure transportation capacity between delivery points in order to serve its customers and various markets.
The physical purchase, transportation, storage, and sale of natural gas associated with these natural gas purchases are accounted for on a weighted-average cost or accrual basis, as appropriate, unlike the fair value basis utilized for the commodity derivatives used to mitigate the natural gas price risk associated with the storage and transportation portfolio. Monthly demand charges are incurred for contracted storage and transportation capacity and payments associated with asset management agreements and these demand charges and payments are recognized in the Consolidated Statement of Income in the period they are incurred.
As Williams is acting as an agent for its natural gas marketing customers and engages in energy trading activities, its natural gas marketing revenues are presented net of the related costs of those activities.
Contract Assets
Williams
Contract assets in the Consolidated Balance Sheet primarily consist of revenue recognized under contracts containing MVC features whereby management has concluded it is probable there will be a short-fall payment at the end of the current MVC period, which typically follows the calendar year, and that a significant reversal of revenue recognized currently for the future MVC payment will not occur. As a result, Williams’ contract assets related to its future MVC payments are generally expected to be collected within the next 12 months and are included within Other current assets and deferred charges in the Consolidated Balance Sheet until such time as the MVC short-fall payments are invoiced to the customer.
Transco and NWP
Transco’s contract assets primarily result from the modification of an existing contract resulting in increased rates. NWP’s contract assets consist of discounts provided to customers in the beginning of the contract term that are recognized on a straight-line basis over the entire contract term resulting in revenue
recognition occurring prior to actual billings. Current and noncurrent contract assets are included within Other current assets and deferred charges and Deferred charges and other, respectively, in the Balance Sheets.
Contract Liabilities
Williams
Contract liabilities in the Consolidated Balance Sheet consist of advance payments primarily from midstream business customers which include construction reimbursements, prepayments, and other billings and transactions for which future services are to be provided under the contract. These amounts are deferred until recognized in revenue when the associated performance obligation has been satisfied, which is primarily based on a units of production methodology over the remaining contractual service periods, and are classified as current or noncurrent according to when such amounts are expected to be recognized. Current and noncurrent contract liabilities are included within Other current liabilities and Regulatory liabilities, deferred income, and other, respectively, in the Consolidated Balance Sheet.
Contracts requiring advance payments and the recognition of contract liabilities are evaluated to determine whether the advance payments provide Williams with a significant financing benefit. This determination is based on the combined effect of the expected length of time between when Williams transfers the promised good or service to the customer, when the customer pays for those goods or services, and the prevailing interest rates. Williams has assessed its contracts for significant financing components and determined, in management’s judgment, that one group of contracts entered into in contemplation of one another for certain capital reimbursements contains a significant financing component. As a result, Williams recognizes noncash interest expense based on the effective interest method and revenue (noncash) is recognized when the underlying asset is placed into service utilizing a units of production or straight-line methodology over the life of the corresponding customer contract.
Transco and NWP
Transco’s contract liabilities consist of advance payments from customers, which include prepayments, and other billings for which future services are to be provided under the contract, and NWP’s contract liabilities consist of a fixed rate facility charge billed to customers with a declining rate structure in its tariffs. Transco assessed its contracts and determined none contain a significant financing component. These liabilities are classified as current or noncurrent according to when such amounts are expected to be recognized. Current and noncurrent contract liabilities are included within Other current liabilities and Deferred charges and other, respectively, in the Balance Sheets

Derivative instruments and hedging activities [Policy Text Block]
Commodity Derivative Instruments and Hedging Activities
Williams is exposed to commodity price risk and utilizes derivatives to manage a portion of its commodity price risk. These instruments consist primarily of swaps, futures, and forward contracts involving short- and long-term purchases and sales of energy commodities. Williams purchases natural gas for storage when the current market price paid to buy and transport natural gas plus the cost to store and finance the natural gas is less than an estimated, forward market price that can be received in the future. Additionally, Williams enters into transactions to secure transportation capacity between delivery points in order to serve its customers and various markets. Commodity-based exchange-traded futures contracts and OTC contracts are used to capture the price differential or spread between the locations served by the capacity in order to substantially protect the natural gas revenues that will ultimately be realized when the physical flow of natural gas between receipt and delivery points occurs. Some commodity derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the natural gas marketing operations. These contracts generally meet the definition of derivatives and are typically not designated as hedges for accounting purposes. When a commodity derivative contract is settled physically, any cumulative unrealized gain or loss is reversed, and the contract price is recognized in the respective line item in the Consolidated Statement of Income representing the
actual price of the underlying goods being delivered. As of December 31, 2024 and 2023, Williams is not applying hedge accounting to any commodity derivative instruments.
Unrealized gains and losses from physically settled commodity derivative contracts for commodity sales transactions are recognized in Net gain (loss) from commodity derivatives in the Consolidated Statement of Income. Realized and unrealized gains and losses from non-designated commodity derivative contracts for commodity sales transactions that are financially settled are reported in Net gain (loss) from commodity derivatives in the Consolidated Statement of Income. Net gains and losses from derivatives for shrink gas purchases for processing plants are reported in Net processing commodity expenses in the Consolidated Statement of Income.
Williams experiences significant earnings volatility from the fair value accounting required for the derivatives used to hedge a portion of the economic value of the underlying transportation and storage portfolio as well as upstream related production. However, the unrealized fair value measurement gains and losses are generally offset by valuation changes in the economic value of the underlying production or transportation and storage contracts, which is not recognized until the underlying transaction occurs. (See Note 17 – Commodity Derivatives.)
Williams reports the fair value of derivatives, except those for which the normal purchases and normal sales exception has been elected, in Derivative assets; Regulatory assets, deferred charges, and other; Derivative liabilities; or Regulatory liabilities, deferred income, and other in the Consolidated Balance Sheet. These amounts are presented on a net basis and reflect the netting of asset and liability positions permitted under the terms of master netting arrangements and cash held on deposit in margin accounts that Williams has received or remitted to collateralize certain derivative positions. Williams determines the current and noncurrent classification based on the timing of expected future cash flows of individual trades.
The accounting for the changes in fair value of a commodity derivative can be summarized as follows:
Derivative Treatment Accounting Method
Normal purchases and normal sales exception Accrual accounting
All other derivatives Mark-to-market accounting
Williams may elect the normal purchases and normal sales exception for certain short- and long-term purchases and sales of physical energy commodities. Under accrual accounting, any change in the fair value of these derivatives is not reflected in the Consolidated Balance Sheet after the initial election of the exception.

Interest capitalized [Policy Text Block]
Interest Capitalized
For its non-regulated companies, Williams capitalizes interest on its debt using the weighted-average interest rate on debt excluding debt issued by Transco, NWP, and MountainWest. This is included in Interest expense in Williams’ Consolidated Statement of Income.
For Williams’ regulated interstate natural gas pipelines, including Transco, NWP, and MountainWest, interest is capitalized from its borrowed funds and from internally generated funds (equity AFUDC) (see Regulatory Accounting). The former is included in Interest expense and the latter is included in Other income (expense) – net below Operating income (loss) in Williams’ Consolidated Statement of Income and Allowance for equity and borrowed funds used during construction (AFUDC) in Transco and NWP’s Statement of Net Income (see Note 9 – Property, Plant, and Equipment).

Income taxes [Policy Text Block]
Income Taxes
Williams includes the operations of its domestic corporate subsidiaries and income from its subsidiary partnerships, as well as income from Transco and NWP which are treated as pass-through entities for state and local income tax purposes, in its consolidated federal income tax return and also files tax returns in various foreign and state jurisdictions as required. Deferred income taxes are computed using the liability method and are provided on
all temporary differences between the financial basis and the tax basis of its assets and liabilities. Management’s judgment and income tax assumptions are used to determine the levels, if any, of valuation allowances associated with deferred tax assets.

Earnings (loss) per common share [Policy Text Block]
Earnings (Loss) Per Common Share
Williams’ Basic earnings (loss) per common share in the Consolidated Statement of Income is based on the sum of the weighted-average number of common shares outstanding and vested restricted stock units. Diluted earnings (loss) per common share in the Consolidated Statement of Income primarily includes any dilutive effect of nonvested restricted stock units and stock options. Diluted earnings (loss) per common share may also include any dilutive effect of Williams’ preferred stock. Diluted earnings (loss) per common share is calculated using the treasury-stock method.

Cash and cash equivalents [Policy Text Block]
Cash and Cash Equivalents
Cash and cash equivalents in the Consolidated Balance Sheet consist of highly liquid investments with original maturities of three months or less when acquired.

Accounts receivable [Policy Text Block]
Accounts Receivable
Accounts receivable are carried on a gross basis, with no discounting, less an allowance for doubtful accounts. Management estimates the allowance for doubtful accounts, considering current expected credit losses using a forward-looking “expected loss” model, the financial condition of its customers, and the age of past due accounts. The majority of trade receivable balances are due within 30 days. Management monitors the credit quality of its counterparties through review of collection trends, credit ratings, and other analyses, such as bankruptcy monitoring. Williams’ financial assets from its natural gas transmission business, natural gas storage business, gathering, processing and transportation business, marketing business, and upstream operations, as applicable, are segregated into separate pools for evaluation due to different counterparty risks inherent in each business, with Transco’s and NWP’s financial assets each evaluated as one pool. Changes in counterparty risk factors could lead to reassessment of the composition of financial assets as one pool, separate pools, or the need for additional pools. Management calculates its allowance for credit losses incorporating an aging method. In estimating its expected credit losses, management utilizes historical loss rates over many years, which for Williams includes periods of both high and low commodity prices. Transco’s and NWP’s expected credit loss estimates considered both internal and external forward-looking commodity price expectations, as well as counterparty credit ratings, and factors impacting near-term liquidity.
Commodity prices could have a significant impact on a portion of Williams’ gathering and processing and upstream counterparties’ financial health and ability to satisfy current obligations. Williams’ expected credit loss estimate considers both internal and external forward-looking commodity price expectations, as well as counterparty credit ratings, and factors impacting near-term liquidity. In addition, Williams’ expected credit loss estimate considers potential contractual, physical, and commercial protections and outcomes in the case of a counterparty bankruptcy. The physical location and nature of Williams’ services help to mitigate collectability concerns of its gathering and processing producer customers. Williams’ gathering lines in many cases are physically connected to the customers’ wellheads and pads, and there may not be alternative gathering lines nearby. The construction of gathering systems is capital intensive and it would be costly for others to replicate, especially considering the depletion to date of the associated reserves. As a result, Williams plays a critical role in getting customers’ production from the wellhead to a marketable condition and location. This tends to reduce collectability risk as Williams’ services enable producers to generate operating cash flows. Commodity price movements generally do not impact the majority of Williams’ natural gas transmission businesses customers’ financial condition.
Williams also provides marketing and risk management services to retail and wholesale gas marketers, utility companies, upstream producers, and industrial customers. These counterparties utilize netting agreements that enable Williams to net receivables and payables by counterparty upon settlement. Williams also nets across product lines and against cash collateral received to collateralize receivable positions, provided the netting and cash
collateral agreements include such provisions. While the amounts due from, or owed to, Williams’ counterparties are settled net, these amounts are recorded on a gross basis in the Consolidated Balance Sheet as accounts receivable and accounts payable.
Extended payment terms are not offered and payments are typically received within one month. Receivables are considered past due if full payment is not received by the contractual due date. Past due accounts are generally written off against the allowance for doubtful accounts only after all collection attempts have been exhausted. Neither Williams, Transco, nor NWP have a material amount of significantly aged receivables at December 31, 2024 or 2023.

Oil and Gas, Gas-Balancing Arrangement
Gas Imbalances
Transco
Transco transports gas on various pipeline systems which may deliver different quantities of gas on behalf of Transco than the quantities of gas received from Transco. These transactions result in gas transportation and exchange imbalance receivables and payables which are recovered or repaid in cash or through the receipt or delivery of gas in the future and are recorded in the accompanying Balance Sheet. Revenues received from the cash-out of transportation imbalances in excess of costs incurred are deferred and offset by the deferral of costs incurred in excess of revenues received. At the end of each annual August through July reporting period, if the cumulative revenues received exceed the costs incurred, the over recovered amounts are applied to any prior under recovery balance or refunded. If the cumulative revenues received are less than the costs incurred, the net under recovered amounts are carried forward and offset against any future net over recoveries that may occur in a subsequent annual reporting period. These deferred recoveries are recognized as Regulatory assets in Transco’s Balance Sheet (see Note 10 – Regulatory Assets and Liabilities).
The settlement of imbalances requires agreement between the pipelines and shippers as to allocations of volumes to specific transportation contracts and timing of delivery of gas based on operational conditions. These imbalances are classified as Other current assets and deferred charges and Other current liabilities in Transco’s Balance Sheet (see Note 10 – Regulatory Assets and Liabilities). Transco utilizes the average cost method of accounting for gas imbalances.
NWP
In the course of providing transportation services to customers, NWP may receive different quantities of natural gas from customers than the quantities delivered on behalf of those customers or consumed in fuel to operate NWP’s system. The resulting customer imbalances are typically settled through the receipt or delivery of gas in the future based on the timelines outlined in NWP’s tariff, whereas the over/under recovery of fuel is cleared up through NWP’s semi-annual fuel tracker. Customer imbalances to be repaid or recovered in-kind are recorded as Other current assets and deferred charges or Other current liabilities in NWP’s Balance Sheet. The under recovery of fuel is recorded as Regulatory assets and the over recovery is recorded in Regulatory liabilities in NWP’s Balance Sheet (see Note 10 – Regulatory Assets and Liabilities). These imbalances are valued at published spot rates.

Inventories [Policy Text Block]
Inventories
Inventories in Williams’ Consolidated Balance Sheet primarily consist of NGLs, materials and supplies, and natural gas in underground storage and are primarily stated at the lower of cost or net realizable value. The cost of inventories are primarily determined using the average cost method. Inventories in Transco’s and NWP’s Balance Sheets primarily consist of materials and supplies and natural gas in underground storage.

Environmental Costs, Policy
Transco and NWP Environmental Matters
Transco and NWP are subject to federal, state, and local environmental laws and regulations. Environmental expenditures are expensed or capitalized depending on the economic benefit and potential for rate recovery. These
entities believe that expenditures required to meet applicable environmental laws and regulations are prudently incurred in the ordinary course of business and such expenditures would be permitted to be recovered through rates with limited exceptions.
In accordance with the Climate Commitment Act of the state of Washington, which established a market-based cap-and-invest program, NWP is required to obtain emission allowances for the carbon emissions from nine of NWP’s thirteen compressor stations within the state of Washington whose annual carbon emissions exceed 25,000 metric tons of carbon dioxide equivalent at least once since 2015. NWP records the purchased emission allowances at cost and the associated accumulated interest to a regulatory asset. The difference between the allowances held and the allowances required based on actual emissions for the period are measured using an estimate based on NWP’s most recent cost of allowances and accrued to a current liability and to a regulatory asset. NWP’s Petition for Approval of Pre-Filing Stipulation and Settlement Agreement (Settlement) in Docket No. RP22-1155, which FERC approved in 2022, allows NWP to recover the costs of purchasing allowances under the program in its next rate case (see Note 18 – Contingencies and Commitments).

Property, plant, and equipment [Policy Text Block]
Property, Plant, and Equipment
Property, plant, and equipment is initially recorded at cost. The carrying value of these assets is based on estimates, assumptions, and judgments relative to capitalized costs, useful lives, and salvage values. For the Transco, NWP, and MountainWest interstate natural gas pipelines, these estimates, assumptions and judgments reflect FERC regulations, as well as historical experience and expectations regarding future industry conditions and operations. The FERC identifies installation, construction and replacement costs that are to be capitalized. All other costs are expensed as incurred.
As regulated entities, Transco, NWP and MountainWest provide for depreciation primarily under the composite (group) method using straight-line FERC-prescribed rates. Under this method, assets with similar lives and characteristics are grouped and depreciated as one asset. These regulated entities’ depreciation rates are subject to change each time these regulated entities file a general rate case with the FERC. Included in Transco’s and NWP’s depreciation rates is a negative salvage component (net cost of removal) that Transco and NWP currently collect in rates that is recorded as a regulatory liability in the Balance Sheets (see Note 10 – Regulatory Assets and Liabilities).
Depreciation for Williams’ nonregulated entities is provided primarily on the straight-line method over estimated useful lives.
Williams follows the successful efforts method of accounting for its upstream properties. Its oil and gas producing property costs are depreciated using the units of production method.
Gains or losses from the ordinary sale or retirement of property, plant, and equipment for the Transco, NWP, and MountainWest interstate natural gas pipelines are credited or charged to accumulated depreciation; certain other gains or losses are recorded in Other (income) expense – net included in Operating income (loss) in the statements of income. Gains or losses from the ordinary sale or retirement of property, plant, and equipment for Williams’ nonregulated assets are primarily recorded in Other (income) expense – net included in Operating income (loss) in the Consolidated Statement of Income.
Ordinary maintenance and repair costs are generally expensed as incurred. Costs of major renewals and replacements are capitalized as property, plant, and equipment.
Williams records a liability and increases the basis in the underlying asset for the present value of each expected future ARO at the time the liability is initially incurred, typically when the asset is acquired or constructed. For Williams’ upstream properties, the ARO is recorded based on Williams’ working interest in the underlying properties. As regulated entities, Transco’s and NWP’s depreciation expense and accretion expense are offset and recorded as a regulatory asset as the regulated entities expect to recover these accretion expenses in future rates and measure changes in the liability due to passage of time by applying an interest rate to the liability balance. This step
is recognized as an increase in the carrying amount of the liability included in Operating and maintenance expenses and as a corresponding accretion expense included in Other (income) expense - net in the Consolidated Statement of Income. The regulatory asset is amortized commensurate with these regulated entities’ collection of those costs in rates.
Measurements of AROs include, as a component of future expected costs, an estimate of the price that a third party would demand, and could expect to receive, for bearing the uncertainties inherent in the obligations, sometimes referred to as a market-risk premium.

Goodwill [Policy Text Block]
Goodwill
Goodwill included within Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, as of December 31, 2024, represents the excess of the consideration, plus the fair value of any noncontrolling interest or any previously held equity interest, over the fair value of the net assets acquired. It is not subject to amortization but is evaluated annually as of October 1 for impairment or more frequently if impairment indicators are present that would indicate it is more likely than not that the fair value of the reporting unit is less than its carrying amount. Management first performs a qualitative assessment to test goodwill on a reporting unit by reporting unit basis to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, management compares its estimate of fair value of the reporting unit to its carrying amount, including goodwill. Judgments and assumptions are inherent in management’s estimates of fair value.

Intangible assets [Policy Text Block]
Other Identifiable Intangible Assets
Williams’ other identifiable intangible assets included within Intangible assets – net of accumulated amortization in the Consolidated Balance Sheet are primarily related to gas gathering, processing, and fractionation customer relationships. Williams’ other identifiable intangible assets are generally amortized on a straight-line basis over the period in which these assets contribute to its cash flows. Williams evaluates these assets for changes in the expected remaining useful lives and reflects any changes prospectively through amortization over the revised remaining useful life.

Impairment of property, plant, and equipment, intangible assets, and investments [Policy Text Block]
Impairment of Property, Plant, and Equipment, Intangible Assets, and Investments
Management evaluates property, plant, and equipment and intangible assets for impairment when, in its judgment, events or circumstances, including probable abandonment, indicate that the carrying value of such assets may not be recoverable. When an indicator of impairment has occurred, management compares its estimate of undiscounted future cash flows attributable to the assets to the carrying value of the assets to determine whether an impairment has occurred and may apply a probability-weighted approach to consider the likelihood of different cash flow assumptions and possible outcomes, including selling the assets in the near term or holding them for the asset’s remaining estimated useful life. If an impairment of the carrying value has occurred, management determines the amount of the impairment to be recognized in the financial statements by estimating the fair value of the assets and recording a loss for the amount that the carrying value exceeds the estimated fair value. This evaluation is performed at the lowest level for which separately identifiable cash flows exist.
For assets identified to be disposed of in the future and considered held for sale, management compares the carrying value to the estimated fair value less the cost to sell to determine if recognition of an impairment is required. Until the assets are disposed of, the estimated fair value, which includes estimated cash flows from operations until the assumed date of sale, is recalculated when related events or circumstances change.
Williams’ investments are evaluated for impairment when, in management’s judgment, events or circumstances indicate that the carrying value of such investments may have experienced an other-than-temporary decline in value. When evidence of loss in value has occurred, management compares its estimate of fair value of the investment to the carrying value of the investment to determine whether an impairment has occurred. If the estimated fair value is
less than the carrying value and management considers the decline in value to be other-than-temporary, the excess of the carrying value over the fair value is recognized in the financial statements as an impairment charge.
Judgment and assumptions are inherent in the estimate of undiscounted future cash flows and an asset’s or investment’s fair value. Additionally, judgment is used to determine the probability of sale with respect to assets considered for disposal.

Equity-method investment basis differences [Policy Text Block]
Equity-Method Investment Basis Differences
Differences between the carrying value of Williams’ equity-method investments and the underlying equity in the net assets of investees are accounted for as if the investees were consolidated subsidiaries. Equity earnings (losses) in the Consolidated Statement of Income includes Williams’ allocable share of net income (loss) of investees adjusted for any depreciation and amortization, as applicable, associated with basis differences.

Leases [Policy Text Block]
Leases
Williams, Transco, and NWP recognize operating lease liabilities based on the present value of the future lease payments and have elected to combine lease and nonlease components for all classes of leased assets in the calculation of the lease liability and the offsetting right-of-use asset in the respective Balance Sheets.
Williams’, Transco’s, and NWP’s lease agreements require both fixed and variable periodic payments, with initial terms typically ranging from one year to 20 years for Williams and up to 30 years for Transco and NWP. Payment provisions in certain lease agreements contain escalation factors which may be based on stated rates or a change in a published index at a future time. The amount by which a lease escalates based on the change in a published index, which is not known at lease commencement, is considered a variable payment and is not included in the present value of the future lease payments, which only includes those that are stated or can be calculated based on the lease agreement at lease commencement. In addition to the noncancellable periods, many of Williams’ lease agreements provide for one or more extensions of the lease agreement for periods ranging from one year in length to an indefinite number of times following the specified contract term. Other lease agreements provide for extension terms that allow Williams, Transco, and NWP to utilize the identified leased asset for an indefinite period of time so long as the asset continues to be utilized in its operations. In consideration of these renewal features, management assesses the term of the lease agreements, which includes using judgment in the determination of which renewal periods and termination provisions, when at its sole election, will be reasonably certain of being exercised. Periods after the initial term or extension terms that allow for either party to the lease to cancel the lease are not considered in the assessment of the lease term. Additionally, management has elected to exclude leases with an original term of one year or less, including renewal periods, from the calculation of the lease liability and the offsetting right-of-use asset.
Judgment is used in determining the discount rate upon which the present value of the future lease payments is determined. This rate is based on a collateralized interest rate corresponding to the term of the lease agreement using company, industry, and market information available.
When permitted under its lease agreements, Williams may sublease certain unused office space for fixed periods that could extend up to the length of the original lease agreement.

Pension and other postretirement benefits [Policy Text Block]
Pension and Other Postretirement Benefits
The funded status of each of the pension and other postretirement benefit plans is recognized separately in Williams’ Consolidated Balance Sheet as either an asset or liability. The plans’ benefit obligations and net periodic benefit costs (credits) are actuarially determined and impacted by various assumptions and estimates.
The discount rates are determined separately for each of Williams’ pension and other postretirement benefit plans based on an approach specific to Williams’ plans. The year-end discount rates are determined considering a
yield curve comprised of high-quality corporate bonds and the timing of the expected benefit cash flows of each plan.
The expected long-term rates of return on plan assets are determined by combining a review of the historical returns within the portfolio, the investment strategy included in the plans’ investment policy statement, and capital market projections for the asset classes in which the portfolio is invested, as well as the weighting of each asset class.
Unrecognized actuarial gains and losses are deferred and recorded in AOCI or, for Transco and NWP, as a regulatory asset or liability, until amortized as a component of net periodic benefit cost (credit). The unrecognized net actuarial gains (losses) deferred in AOCI at December 31, 2024 and 2023 were $55 million and ($17) million, respectively. Unrecognized actuarial gains and losses in excess of 10 percent of the greater of the benefit obligation or the market-related value of plan assets are amortized over the participants’ average remaining future years of service, which is approximately 9 years for Williams’ pension plans and approximately 4 years for Williams’ other postretirement benefit plan.
The expected return on plan assets component of net periodic benefit cost (credit) is calculated using the market-related value of plan assets. For Williams’ pension plans, the market-related value of plan assets is equal to the fair value of plan assets adjusted to reflect the amortization of gains or losses associated with the difference between the expected and actual return on plan assets over a 5-year period. Additionally, the market-related value of assets may be no more than 110 percent or less than 90 percent of the fair value of plan assets at the beginning of the year. The market-related value of plan assets for Williams’ other postretirement benefit plan is equal to the unadjusted fair value of plan assets at the beginning of the year.

Contingent liabilities [Policy Text Block]
Contingent Liabilities
Liabilities for loss contingencies, including environmental matters, are recorded when management assesses that a loss is probable and the amount of the loss can be reasonably estimated. These liabilities are calculated based upon management’s assumptions and estimates with respect to the likelihood or amount of loss and upon advice of legal counsel, engineers, or other third parties regarding the probable outcomes of the matters. These calculations are made without consideration of any potential recovery from third parties. Insurance recoveries or reimbursements from others are recognized when realizable. Revisions to these liabilities are generally reflected in income when new or different facts or information become known or circumstances change that affect the previous assumptions or estimates.

Treasury stock [Policy Text Block]
Treasury Stock
Treasury stock purchases are accounted for under the cost method whereby the entire cost of the acquired stock is recorded as Treasury stock, at cost in Williams’ Consolidated Balance Sheet. Gains and losses on the subsequent reissuance of shares are credited or charged to Capital in excess of par value in the Consolidated Balance Sheet using the average cost method.

Cash Flows From Operating Activities
Cash Flows from Operating Activities
Williams, Transco, and NWP use the indirect method to report cash flows from operating activities, which requires adjustments to net income to reconcile to net cash flows provided by operating activities.

Cash flows from revolving credit facility and commercial paper program [Policy Text Block]
Cash Flows from Revolving Credit Facility and Commercial Paper Program
Proceeds and payments related to borrowings under Williams’ revolving credit facility are reflected in the financing activities in the Consolidated Statement of Cash Flows on a gross basis. Proceeds and payments related to borrowings under Williams’ commercial paper program are reflected in the financing activities in the Consolidated Statement of Cash Flows on a net basis, as the outstanding notes generally have maturity dates less than three months from the date of issuance. (See Note 13 – Debt and Banking Arrangements.)

New Accounting Pronouncements, Policy
Accounting Standards Issued But Not Yet Adopted
In December 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2023-09, Income Taxes: Improvements to Income Tax Disclosures, which requires disclosure of specific categories in the rate reconciliation and additional information for reconciling items that meet a quantitative threshold. This ASU is effective for fiscal years beginning after December 15, 2024, and early adoption is permitted. The adoption of ASU 2023-09 is not expected to have a material impact on the financial statements.
In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures, which requires public entities to disclose additional information in the notes to financial statements for certain types of expenses (including purchases of inventory, employee compensation, depreciation, amortization, and depletion) in commonly presented expense captions (such as cost of sales, selling, general & administrative expenses, and research and development). The amendments are effective for annual periods beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027 with early adoption permitted. The impact of this standard is currently being evaluated.

v3.25.0.1

General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies (Tables)
12 Months Ended

Dec. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Public Utilities General Disclosures
The FERC has prescribed a formula to be used in computing separate allowances for borrowed and equity AFUDC. These allowances are recorded as follows:

Transco

Year Ended December 31,
2024 2023 2022
(Millions)
Allowance for borrowed funds used during construction $ 17 $ 14 $ 5
Allowance for equity funds used during construction
71 63 23
Allowance for equity and borrowed funds used during construction (AFUDC)
$ 88 $ 77 $ 28
NWP

Year Ended December 31,
2024 2023 2022
(Millions)
Allowance for borrowed funds used during construction $ 2 $ 1 $ 1
Allowance for equity funds used during construction
8 3 2
Allowance for equity and borrowed funds used during construction (AFUDC)
$ 10 $ 4 $ 3

v3.25.0.1

Variable Interest Entities (Tables)
12 Months Ended

Dec. 31, 2024

Variable Interest Entity Disclosures [Abstract]

Schedule of Variable Interest Entities [Table Text Block]
The following table presents amounts included in the Consolidated Balance Sheet that are only for the use or obligation of the consolidated VIEs:
December 31,
2024 2023
(Millions)
Assets (liabilities):
Cash and cash equivalents $ 15 $ 33
Trade accounts and other receivables – net 178 215
Inventories 5 5
Other current assets and deferred charges 7 4
Property, plant, and equipment – net 4,896 5,046
Intangible assets – net of accumulated amortization 1,940 2,049
Regulatory assets, deferred charges, and other 27 31
Accounts payable (57) (109)
Other current liabilities
(29) (28)
Regulatory liabilities, deferred income, and other (263) (268)

v3.25.0.1

Acquisitions and Divestitures (Tables)
12 Months Ended

Dec. 31, 2024

Business Acquisition [Line Items]

Business Acquisition, Pro Forma Information [Table Text Block]
The following pro forma Revenues and Net income (loss) attributable to The Williams Companies, Inc. for 2024, 2023, and 2022, are presented as if the Crowheart Acquisition, Discovery Acquisition, and Gulf Coast Storage Acquisition had been completed on January 1, 2023, the DJ Basin Acquisitions and MountainWest Acquisition had been completed on January 1, 2022, and the Trace Acquisition had been completed on January 1, 2021. These pro forma amounts are not necessarily indicative of what the actual results would have been if the acquisitions had in fact occurred on the dates or for the periods indicated, nor do they purport to project Revenues or Net income (loss) attributable to The Williams Companies, Inc. for any future periods or as of any date. These amounts do not give
effect to any potential cost savings, operating synergies, or revenue enhancements to result from the transactions or the potential costs to achieve these cost savings, operating synergies, and revenue enhancements.
Year Ended December 31, 2024
As Reported
Pro Forma Crowheart (1)
Pro Forma Discovery (1)
Pro Forma Combined
(Millions)
Revenues $ 10,503 $ 60 $ 58 $ 10,621
Net income (loss) attributable to The Williams Companies, Inc. 2,225 8 (5) 2,228
Year Ended December 31, 2023
As Reported
Pro Forma Crowheart
Pro Forma Discovery
Pro Forma Gulf Coast Storage
Pro Forma DJ Basin (1)
Pro Forma MountainWest (1)
Pro Forma Combined
(Millions)
Revenues $ 10,907 $ 74 $ 129 $ 202 $ 270 $ 35 $ 11,617
Net income (loss) attributable to The Williams Companies, Inc. 3,179 19 (1) 53 17 6 3,273
Year Ended December 31, 2022
As Reported
Pro Forma DJ Basin
Pro Forma MountainWest
Pro Forma Trace (1)
Pro Forma Combined
(Millions)
Revenues $ 10,965 $ 218 $ 265 $ 45 $ 11,493
Net income (loss) attributable to The Williams Companies, Inc. 2,049 13 170 18 2,250
(1)Excludes results from operations acquired in the acquisition for the period beginning on the acquisition date, as these results are included in the amounts as reported.

Crowheart Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
The following table presents the preliminary allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 1, 2024. The allocation is considered preliminary because the valuation work has not been completed due to the ongoing review of the valuation results and validation of significant inputs and assumptions. Preliminary fair value measurements were made for certain acquired assets and liabilities, primarily property, plant, and equipment, which utilized the income approach for proved developed producing reserves and the market approach for undeveloped reserves; however, adjustments to those measurements may be made in subsequent periods, up to one year from the acquisition date, as new information related to facts and circumstances as of the acquisition date may be identified.
(Millions)
Cash and cash equivalents $ 94
Other current assets
15
Property, plant, and equipment – net 400
Other noncurrent assets
2
Total assets acquired 511
Current liabilities
(45)
Noncurrent liabilities
(115)
Total liabilities assumed (160)
Net assets acquired
$ 351

Discovery Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
The following table presents the preliminary allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at August 1, 2024. The allocation is considered preliminary because the valuation work has not been completed due to the ongoing review of the valuation results and validation of significant inputs and assumptions. Preliminary fair value measurements were made for certain acquired assets and liabilities, primarily property, plant, and equipment, which utilized the cost approach; however, adjustments to those measurements may be made in subsequent periods, up to one year from the acquisition date, as new information related to facts and circumstances as of the acquisition date may be identified.
(Millions)
Cash and cash equivalents $ 22
Other current assets 19
Property, plant, and equipment – net 941
Other noncurrent assets 39
Total assets acquired
1,021
Current liabilities (40)
Noncurrent liabilities
(296)
Total liabilities assumed (336)
Net assets acquired $ 685

Gulf Coast Storage Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at January 3, 2024.
(Millions)
Cash and cash equivalents $ 46
Other current assets 18
Property, plant, and equipment – net 2,035
Other noncurrent assets 2
Total assets acquired
2,101
Current liabilities (11)
Noncurrent liabilities
(107)
Total liabilities assumed (118)
Net assets acquired $ 1,983

Cureton Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 30, 2023.
(Millions)
Cash and cash equivalents $ 6
Other current assets 21
Property, plant, and equipment – net 433
Intangible assets – net of accumulated amortization 117
Other noncurrent assets 1
Total identifiable assets acquired 578
Current liabilities (29)
Noncurrent liabilities
(14)
Total liabilities assumed (43)
Net identifiable assets acquired 535
Goodwill included in Intangible assets – net of accumulated amortization
11
Net assets acquired $ 546

RMM Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 30, 2023. The net assets acquired primarily reflect the noncash consideration transferred, which includes the fair value of both Williams’ previous equity-method investment and the deferred consideration obligation.

(Millions)
Cash and cash equivalents $ 28
Other current assets 4
Investments 20
Property, plant, and equipment – net 1,041
Intangible assets – net of accumulated amortization 63
Other noncurrent assets 12
Total identifiable assets acquired 1,168
Current liabilities (44)
Noncurrent liabilities
(103)
Total liabilities assumed (147)
Net identifiable assets acquired 1,021
Goodwill included in Intangible assets – net of accumulated amortization
55
Net assets acquired $ 1,076

MountainWest Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at February 14, 2023. The fair value of accounts receivable acquired equals contractual amounts receivable.
(Millions)
Cash and cash equivalents $ 23
Trade accounts and other receivables 33
Other current assets 26
Investments 20
Property, plant, and equipment – net 1,019
Other noncurrent assets 33
Total identifiable assets acquired 1,154
Current liabilities (47)
Long-term debt (365)
Other noncurrent liabilities (95)
Total liabilities assumed (507)
Net identifiable assets acquired 647
Goodwill included in Intangible assets – net of accumulated amortization
400
Net assets acquired $ 1,047

Trace Midstream Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
Williams accounted for the Trace Acquisition as a business combination. The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at April 29, 2022. The valuation techniques used consisted of the income approach for valuation of intangible assets and the cost approach for property, plant, and equipment.
(Millions)
Cash and cash equivalents $ 39
Trade accounts and other receivables
18
Property, plant, and equipment – net 448
Intangible assets – net of accumulated amortization 472
Other noncurrent assets 20
Total assets acquired 997
Accounts payable (12)
Other current liabilities (5)
Other noncurrent liabilities (8)
Total liabilities assumed (25)
Net assets acquired $ 972

v3.25.0.1

Revenue Recognition (Tables)
12 Months Ended

Dec. 31, 2024

Revenue Recognition [Abstract]

Disaggregation of Revenue [Table Text Block]
The following table presents Williams’ revenue disaggregated by major service line:
Transmission & Gulf of America Northeast G&P West Gas & NGL Marketing Services Other Eliminations Total
(Millions)
2024
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage $ 3,500 $ — $ — $ — $ — $ (81) $ 3,419
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration 661 1,778 1,693 — — (162) 3,970
Commodity consideration 54 2 78 — — — 134
Other 46 92 21 — — (19) 140
Total service revenues 4,261 1,872 1,792 — — (262) 7,663
Product sales 328 110 869 4,530 420 (1,288) 4,969
Total revenues from contracts with customers 4,589 1,982 2,661 4,530 420 (1,550) 12,632
Other revenues (1) 39 43 8 2,236 24 (2) 2,348
Other adjustments (2) — — — (4,977) — 500 (4,477)
Total revenues $ 4,628 $ 2,025 $ 2,669 $ 1,789 $ 444 $ (1,052) $ 10,503
2023
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage $ 3,334 $ — $ — $ — $ — $ (60) $ 3,274
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration
443 1,782 1,478 — — (170) 3,533
Commodity consideration 38 5 103 — — — 146
Other
30 87 12 1 — (15) 115
Total service revenues 3,845 1,874 1,593 1 — (245) 7,068
Product sales 252 132 441 4,615 442 (954) 4,928
Total revenues from contracts with customers 4,097 2,006 2,034 4,616 442 (1,199) 11,996
Other revenues (1) 53 27 101 4,294 64 (2) 4,537
Other adjustments (2) — — — (6,032) — 406 (5,626)
Total revenues $ 4,150 $ 2,033 $ 2,135 $ 2,878 $ 506 $ (795) $ 10,907
Transmission & Gulf of America Northeast G&P West Gas & NGL Marketing Services Other Eliminations Total
(Millions)
2022
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage $ 3,139 $ — $ — $ — $ — $ (72) $ 3,067
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration
381 1,526 1,518 — — (167) 3,258
Commodity consideration 64 14 182 — — — 260
Other
21 102 12 3 — (16) 122
Total service revenues 3,605 1,642 1,712 3 — (255) 6,707
Product sales 404 134 841 10,768 706 (1,787) 11,066
Total revenues from contracts with customers 4,009 1,776 2,553 10,771 706 (2,042) 17,773
Other revenues (1) 38 26 8 7,929 (55) (11) 7,935
Other adjustments (2) — — — (15,467) — 724 (14,743)
Total revenues $ 4,047 $ 1,802 $ 2,561 $ 3,233 $ 651 $ (1,329) $ 10,965
______________________________
(1)Revenues not derived from contracts with customers primarily consist of physical product sales related to commodity derivative contracts, realized and unrealized gains and losses associated with Williams’ commodity derivative contracts, which are reported in Net gain (loss) from commodity derivatives in the Consolidated Statement of Income, management fees received for certain services provided to operated equity-method investments, and leasing revenues associated with the Williams headquarters building.
(2)Other adjustments reflect certain costs of Gas & NGL Marketing Services’ risk management activities. As Williams is acting as agent for natural gas marketing customers or engages in energy trading activities, the resulting revenues are presented net of the related costs of those activities in the Consolidated Statement of Income.

Contract with Customer, Asset and Liability [Table Text Block]
The following tables present a reconciliation of contract assets:
Williams
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 36 $ 29
Revenue recognized in excess of amounts invoiced 170 183
Minimum volume commitments invoiced (144) (176)
Contract assets acquired 36 —
Balance at end of year $ 98 $ 36
Transco
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ — $ —
Revenue recognized in excess of amounts invoiced 10 —
Balance at end of year $ 10 $ —

NWP
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 17 $ 13
Revenue recognized in excess of amounts invoiced 6 6
Amortization of contract assets (2) (2)
Balance at end of year $ 21 $ 17

Contract Liabilities
The following tables present a reconciliation of contract liabilities:
Williams
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 1,081 $ 1,043
Payments received and deferred 183 190
Significant financing component 8 9
Contract liability acquired (disposed) – net 53 115
Recognized in revenue (279) (276)
Balance at end of year $ 1,046 $ 1,081
Transco
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 184 $ 194
Recognized in revenue (11) (10)
Balance at end of year $ 173 $ 184
NWP
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 2 $ 3
Recognized in revenue (2) (1)
Balance at end of year $ — $ 2

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]
The following tables present the amount of the contract liabilities balance expected to be recognized as revenue when performance obligations are satisfied and the transaction price allocated to the remaining performance obligations under certain contracts as of December 31, 2024.

Williams
Contract Liabilities Remaining Performance Obligations
(Millions)
2025 (one year)
$ 173 $ 4,132
2026 (one year)
146 3,860
2027 (one year)
141 3,623
2028 (one year)
118 2,778
2029 (one year)
100 2,564
Thereafter
368 14,102
   Total $ 1,046 $ 31,059
Transco
Contract Liabilities Remaining Performance Obligations
(Millions)
2025 (one year)
$ 10 $ 2,726
2026 (one year)
10 2,536
2027 (one year)
11 2,438
2028 (one year)
11 1,784
2029 (one year)
11 1,693
Thereafter
120 10,421
   Total $ 173 $ 21,598

NWP
Contract Liabilities Remaining Performance Obligations
(Millions)
2025 (one year)
$ — $ 391
2026 (one year)
— 386
2027 (one year)
— 373
2028 (one year)
— 368
2029 (one year)
— 349
Thereafter
— 2,234
   Total $ — $ 4,101

v3.25.0.1

Provision (Benefit) for Income Taxes (Tables)
12 Months Ended

Dec. 31, 2024

Income Tax Expense (Benefit), Continuing Operations [Abstract]

Schedule of Components of Provision (benefit) for income taxes [Table Text Block]
The Provision (benefit) for income taxes from continuing operations includes:
Year Ended December 31,
2024 2023 2022
(Millions)
Current:
Federal $ 125 $ 3 $ (25)
State 9 21 19
134 24 (6)
Deferred:
Federal 472 872 424
State 34 109 7
506 981 431
Provision (benefit) for income taxes $ 640 $ 1,005 $ 425

Provision for income taxes at federal statutory rate [Table Text Block]
Reconciliations from the Provision (benefit) at statutory rate from continuing operations to recorded Provision (benefit) for income taxes are as follows:
Year Ended December 31,
2024 2023 2022
(Millions)
Provision (benefit) at statutory rate $ 627 $ 925 $ 534
Increases (decreases) in taxes resulting from:
State income taxes (net of federal benefit)
79 129 113
State deferred income tax rate change (44) (25) (92)
Federal valuation allowance
— — (70)
Federal settlements — — (45)
Impact of nontaxable noncontrolling interests
(25) (26) (14)
Other – net
3 2 (1)
Provision (benefit) for income taxes $ 640 $ 1,005 $ 425

Deferred tax liabilities and Deferred tax assets [Table Text Block]
Significant components of Deferred income tax liabilities are as follows:
December 31,
2024 2023
(Millions)
Gross deferred income tax liabilities:
Property, plant and equipment
$ 4,501 $ 3,541
Investments
1,733 1,740
Other
193 146
Total gross deferred income tax liabilities 6,427 5,427
Gross deferred income tax assets:
Accrued liabilities
1,146 868
Corporate alternative minimum tax credits
108 —
Foreign tax credits — 35
Federal loss carryovers
325 398
Disallowed business interest expense carryforward
247 67
State losses and credits
224 293
Other
92 103
Total gross deferred income tax assets 2,142 1,764
Less valuation allowance 91 183
Net deferred income tax assets 2,051 1,581
Deferred income tax liabilities $ 4,376 $ 3,846

v3.25.0.1

Employee Benefit Plans (Tables)
12 Months Ended

Dec. 31, 2024

Retirement Benefits [Abstract]

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, Funded Status, and Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
The following table presents the changes in benefit obligations and plan assets for pension benefits and other postretirement benefits for the years indicated:
Pension Benefits Other
Postretirement Benefits
2024 2023 2024 2023
(Millions)
Change in benefit obligation:
Benefit obligation at beginning of year
$ 1,006 $ 940 $ 145 $ 152
Service cost
25 23 1 1
Interest cost
47 46 7 7
Plan participants’ contributions
— — 2 2
Benefits paid
(73) (71) (11) (13)
Net actuarial loss (gain) (1) (65) 68 (12) (4)
Settlements
(3) — — —
Net increase (decrease) in benefit obligation (69) 66 (13) (7)
Benefit obligation at end of year
937 1,006 132 145
Change in plan assets:
Fair value of plan assets at beginning of year
1,167 1,117 262 253
Actual return on plan assets
88 120 16 17
Employer contributions
4 1 3 3
Plan participants’ contributions
— — 2 2
Benefits paid
(73) (71) (11) (13)
Settlements
(3) — — —
Net increase (decrease) in fair value of plan assets 16 50 10 9
Fair value of plan assets at end of year
1,183 1,167 272 262
Funded status — overfunded (underfunded) $ 246 $ 161 $ 140 $ 117
Amounts recognized in the Consolidated Balance Sheet:
Noncurrent assets $ 270 $ 187 $ 143 $ 120
Current liabilities (4) (4) (3) (3)
Noncurrent liabilities (20) (22) — —
Funded status — overfunded (underfunded) $ 246 $ 161 $ 140 $ 117
Accumulated benefit obligation $ 929 $ 998
____________
(1)    2024 amounts are due primarily to changes in the following factors: Pension Benefits - discount rate assumptions and interest crediting rate assumption; Other Postretirement Benefits - discount rate assumption. 2023 amounts are due primarily to changes in the following factors: Pension Benefits - interest crediting rate assumption and discount rate assumptions.

Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block]
The following table summarizes information for pension plans with obligations in excess of plan assets at December 31.
2024 2023
(Millions)
Projected benefit obligation $ 23 $ 26
Accumulated benefit obligation 22 24
Fair value of plan assets — —

Pre-tax amounts recognized in Accumulated other comprehensive income (loss)[Table Text Block]
Pre-tax amounts recognized in Accumulated other comprehensive income (loss) at December 31 are as follows:
Pension Benefits Other
Postretirement Benefits
2024 2023 2024 2023
(Millions)
Net actuarial gain (loss) $ 49 $ (45) $ 20 $ 19

Schedule of Net Benefit Cost (Credit) [Table Text Block]
Net periodic benefit cost (credit) for the years ended December 31 consist of the following:
Pension Benefits Other
Postretirement Benefits
2024 2023 2022 2024 2023 2022
(Millions)
Components of net periodic benefit cost (credit):
Service cost
$ 25 $ 23 $ 28 $ 1 $ 1 $ 1
Interest cost
47 46 31 7 7 6
Expected return on plan assets
(60) (57) (44) (11) (10) (10)
Amortization of net actuarial loss (gain)
— 5 12 (5) (3) —
Net actuarial loss from settlements
1 — 3 — — —
Reclassification to regulatory liability
— — — — — 1
Net periodic benefit cost (credit) (1) $ 13 $ 17 $ 30 $ (8) $ (5) $ (2)
____________
(1)    Components other than Service cost are included in Other income (expense) – net below Operating income (loss) in Williams’ Consolidated Statement of Income.

Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) [Table Text Block]
Other changes in plan assets and benefit obligations recognized in Other comprehensive income (loss) before taxes for the years ended December 31 consist of the following:
Pension Benefits Other
Postretirement Benefits
2024 2023 2022 2024 2023 2022
(Millions)
Net actuarial gain (loss) arising during the year $ 93 $ (5) $ (14) $ 3 $ 3 $ 14
Amortization of net actuarial loss (gain)
— 5 12 (2) (2) —
Net actuarial loss from settlements 1 — 3 — — —
Total recognized in Other comprehensive income (loss)
$ 94 $ — $ 1 $ 1 $ 1 $ 14

Defined Benefit Plan, Assumptions [Table Text Block]
The weighted-average assumptions utilized to determine benefit obligations and Net periodic benefit cost (credit) as of December 31 are as follows:
Pension Benefits Other
Postretirement Benefits
2024 2023 2022 2024 2023 2022
Benefit obligations:
Discount rate 5.60 % 4.98 % 5.16 % 5.67 % 5.01 % 5.20 %
Rate of compensation increase 3.48 3.52 3.58 N/A N/A N/A
Cash balance interest crediting rate 4.00 4.50 3.50 N/A N/A N/A
Net periodic benefit cost (credit):
Discount rate 4.98 % 5.16 % 2.84 % 5.01 % 5.20 % 2.93 %
Expected long-term rate of return on plan assets 5.31 5.17 3.81 4.16 4.04 3.67
Rate of compensation increase 3.52 3.58 3.67 N/A N/A N/A
Cash balance interest crediting rate 4.50 3.50 3.00 N/A N/A N/A

Fair values of plan assets [Table Text Block]
The fair values of Williams’ pension and other postretirement benefits plan assets by asset class at December 31 are as follows:
2024
Pension Benefits Other Postretirement Benefits

Level 1 (1) Level 2 (2) Total Level 1 (1) Level 2 (2) Total
(Millions)
Cash management funds $ 29 $ — $ 29 $ 103 $ — $ 103
Government debt securities 74 19 93 11 3 14
Corporate debt securities — 295 295 — 43 43
Other 1 4 5 — — —
$ 104 $ 318 422 $ 114 $ 46 160
Commingled investment funds (3):
Equities 292 43
Fixed income 469 69
Total assets at fair value $ 1,183 $ 272
2023
Pension Benefits Other Postretirement Benefits
Level 1 (1) Level 2 (2) Total Level 1 (1) Level 2 (2) Total
(Millions)
Cash management funds $ 17 $ — $ 17 $ 99 $ — $ 99
Government debt securities 61 17 78 9 2 11
Corporate debt securities — 311 311 — 44 44
Other 2 5 7 1 — 1
$ 80 $ 333 413 $ 109 $ 46 155
Commingled investment funds (3):
Equities 287 41
Fixed income 467 66
Total assets at fair value $ 1,167 $ 262
____________
(1)    Level 1 includes assets with fair values based on quoted prices in active markets for identical assets. Cash management funds and U.S. Treasury securities are included in this level.
(2)    Level 2 includes assets with fair values determined by using significant other observable inputs. This level includes fixed income securities, other than U.S. Treasury securities, that are valued primarily using pricing models which incorporate observable inputs such as benchmark yields, reported trades, broker/dealer quotes, and issuer spreads.
(3)    The commingled investment funds are measured at fair value using net asset value per share. Certain standard withdrawal restrictions generally apply, which may include redemption notification periods ranging from 1 day to 15 days.

Expected benefit payments [Table Text Block]
Following are the expected benefit payments, which reflect the same assumptions previously discussed and future service as appropriate.
Pension
Benefits Other
Postretirement
Benefits
(Millions)
2025
$ 101 $ 11
2026
95 11
2027
91 11
2028
87 11
2029
83 10
2030-2034
389 48

v3.25.0.1

Investing Activities (Tables)
12 Months Ended

Dec. 31, 2024

Investments [Abstract]

Investments [Table Text Block]

Ownership Interest at December 31, 2024
December 31,
2024 2023
(Millions)
Appalachia Midstream Investments (1) $ 2,810 $ 2,886
OPPL 50% 385 387
Blue Racer 50% 366 398
Gulfstream 50% 196 210
Laurel Mountain 69% 171 184
Discovery (2)
100% — 361
Other Various 179 188
$ 4,107 $ 4,614
___________
(1)Includes equity-method investments in multiple gathering systems in the Marcellus Shale region with an approximate average 66 percent interest.
(2)Discovery is a wholly owned subsidiary of Williams as of August 1, 2024. See Note 3 – Acquisitions and Divestitures.

Contributions [Table Text Block]
Purchases of and contributions to equity-method investments
Williams generally funds its portion of significant expansion or development projects of these investees through additional capital contributions. These transactions increased the carrying value of Williams’ investments and included:
Year Ended December 31,
2024 2023 2022
(Millions)
Appalachia Midstream Investments $ 74 $ 59 $ 83
Discovery 37 40 41
OPPL
2 1 —
Aux Sable Liquid Products LP
1 38 —
Cardinal Pipeline Company, LLC — — 16
Gulfstream — — 14
Other — 3 12
$ 114 $ 141 $ 166

Dividends and distributions [Table Text Block]
Dividends and distributions
The organizational documents of entities in which Williams has an equity-method investment generally require distribution of available cash to members on at least a quarterly basis. These transactions reduced the carrying value of its investments and included:
Year Ended December 31,
2024 2023 2022
(Millions)
Appalachia Midstream Investments $ 407 $ 405 $ 415
Gulfstream 103 98 89
Blue Racer
95 62 49
OPPL
90 56 34
Laurel Mountain
29 42 112
Discovery 22 49 49
RMM — 49 52
Other 43 35 65
$ 789 $ 796 $ 865

Summarized Financial Position and Results of Operations of Equity Method Investments [Table Text Block]
Summarized Financial Position and Results of Operations of All Equity-Method Investments
December 31,
2024 2023
(Millions)
Assets (liabilities):
Current assets
$ 564 $ 669
Noncurrent assets
9,439 11,058
Current liabilities
(1,146) (358)
Noncurrent liabilities
(2,383) (3,619)
Year Ended December 31,
2024 2023 2022
(Millions)
Gross revenue $ 2,880 $ 3,714 $ 5,520
Operating income 1,190 966 1,268
Net income 987 748 1,102

Investment Income
Other investing income (loss) – net
The following table presents certain items reflected in Other investing income (loss) – net in Williams’ Consolidated Statement of Income:
Year Ended December 31,
2024 2023 2022
(Millions)
Gain on sale of Aux Sable investments
$ 149 $ — $ —
Gain on remeasurement of Discovery investment (Note 3)
127 — —
Interest income
67 79 15
Gain on remeasurement of RMM investment (Note 3)
— 30 —
Other
— (1) 1
$ 343 $ 108 $ 16

v3.25.0.1

Property, Plant, and Equipment (Tables)
12 Months Ended

Dec. 31, 2024

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment [Table Text Block]
The following tables present Property, plant, and equipment – net for the years ended:
Williams
Estimated
Useful Life (1)
(Years) Depreciation
Rates (1)
(%) December 31,
2024 2023
(Millions)
Nonregulated:
Natural gas gathering and processing facilities
5 - 40
$ 23,134 $ 21,357
Construction in progress Not applicable 1,543 1,138
Oil and gas properties Units of production 1,685 1,111
Other
0 - 45
4,798 3,268
Regulated:
Natural gas transmission facilities
0 - 25
1.25 - 10.2
22,763 21,083
Construction in progress Not applicable Not applicable 542 1,124
Other
5 - 45
0.00 - 33.33
2,930 2,761
Total property, plant, and equipment, at cost 57,395 51,842
Accumulated depreciation and amortization (18,703) (17,531)
Property, plant, and equipment — net $ 38,692 $ 34,311
Transco
Depreciation
Rates (1)
(%) December 31,
2024 2023
(Millions)
Onshore transmission facilities
2.50 - 7.13
$ 17,242 $ 16,031
Offshore transmission facilities
1.25
659 681
Storage facilities
1.86 - 2.05
948 830
Gathering facilities
0.00 - 1.00
136 158
Construction in progress
Not applicable 420 1,008
Other
1.77 - 20.00
639 585
Total property, plant, and equipment, at cost 20,044 19,293
Accumulated depreciation and amortization (5,941) (5,963)
Property, plant, and equipment — net $ 14,103 $ 13,330
NWP
Depreciation
Rates (1)
(%) December 31,
2024 2023
(Millions)
Transmission facilities
2.70 - 10.20
$ 3,821 $ 3,570
Storage facilities
1.60 - 2.76
160 155
Construction in progress
Not applicable 66 85
Other
0.00 - 33.33
171 165
Total property, plant, and equipment, at cost 4,218 3,975
Accumulated depreciation and amortization (2,089) (2,026)
Property, plant, and equipment — net $ 2,129 $ 1,949
__________
(1) Estimated useful life and depreciation rates are presented as of December 31, 2024. Depreciation rates and estimated useful lives for regulated assets are prescribed by the FERC.

Schedule of Change in Asset Retirement Obligation
The following tables present the significant changes to AROs, of which $2.548 billion and $1.978 billion are included in Regulatory liabilities, deferred income, and other with the remaining current portion in Other current liabilities at December 31, 2024 and 2023, respectively.
Williams
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 2,084 $ 1,914
Liabilities incurred (1)
474 42
Liabilities settled (68) (43)
Accretion 118 97
Revisions (2)
31 74
Balance at end of year $ 2,639 $ 2,084
___________
(1)Includes $250 million, $106 million, and $114 million of ARO in 2024 related to the Discovery, Gulf Coast Storage, and Crowheart Acquisitions, respectively.
(2)Several factors are considered in the annual review process, including inflation rates, current estimates for removal cost, market risk premiums, discount rates, and the estimated remaining useful life of the assets.
Transco
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 619 $ 563
Liabilities incurred
— 8
Liabilities settled
(32) (23)
Accretion
29 31
Revisions (1)
(1) 40
Balance at end of year $ 615 $ 619
___________
(1)Changes in estimates of existing obligations are primarily due to the annual review process, which considers various factors including inflation rate, current estimates for removal costs, discount rates, and the estimated remaining life of assets.
NWP
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of year $ 136 $ 129
Accretion
8 7
Balance at end of year $ 144 $ 136

v3.25.0.1

Regulatory Assets and Liabilities (Tables)
12 Months Ended

Dec. 31, 2024

Regulated Operations [Abstract]

Schedule of Regulatory Assets
Williams
December 31,
2024 2023
(Millions)
Current assets reported within Other current assets and deferred charges
$ 84 $ 95
Noncurrent assets reported within Regulatory assets, deferred charges, and other
582 527
Total regulatory assets $ 666 $ 622
Current liabilities reported within Other current liabilities
$ 85 $ 77
Noncurrent liabilities reported within Regulatory liabilities, deferred income, and other
1,300 1,288
Total regulatory liabilities $ 1,385 $ 1,365
Transco
December 31,
2024 2023
(Millions)
Current regulatory assets:
Fuel recovery $ 47 $ 60
ARO 16 16
Deferred cash out 6 6
ARO - Eminence 5 5
Total current regulatory assets 74 87
Long-term regulatory assets:
ARO 243 209
Grossed-up deferred taxes on equity AFUDC 29 31
ARO - Eminence 15 20
Slug catcher 6 6
Deferred cash out — 11
Other 27 22
Total long-term regulatory assets 320 299
Total regulatory assets $ 394 $ 386
Current regulatory liabilities:
Deferred taxes - liability $ 31 $ 31
Postretirement benefits other than pension — 8
Electric power cost 26 7
Pension — 2
Other 1 1
Total current regulatory liabilities 58 49
Long-term regulatory liabilities:
Negative salvage 632 605
Deferred taxes - liability 252 283
Postretirement benefits other than pension 31 23
Pension 30 24
Sentinel meter station depreciation 7 7
Other 24 14
Total long-term regulatory liabilities 976 956
Total regulatory liabilities $ 1,034 $ 1,005
NWP
December 31,
2024 2023
(Millions)
Current regulatory assets:
Fuel recovery $ 4 $ —
Levelized depreciation 2 2
Total current regulatory assets 6 2
Long-term regulatory assets:
Levelized depreciation 7 10
Grossed-up deferred taxes on equity AFUDC 4 4
Washington State Carbon and Greenhouse Gas Tax 38 22
Total long-term regulatory assets
49 36
Total regulatory assets $ 55 $ 38
Current regulatory liabilities:
Deferred taxes - liability $ 20 $ 20
Fuel recovery — 1
Total current regulatory liabilities 20 21
Long-term regulatory liabilities:
Deferred taxes - liability 160 179
Postretirement benefits other than pension 43 42
Negative salvage - net 30 31
Total long-term regulatory liabilities 233 252
Total regulatory liabilities $ 253 $ 273

Schedule of Regulatory Liabilities
Williams
December 31,
2024 2023
(Millions)
Current assets reported within Other current assets and deferred charges
$ 84 $ 95
Noncurrent assets reported within Regulatory assets, deferred charges, and other
582 527
Total regulatory assets $ 666 $ 622
Current liabilities reported within Other current liabilities
$ 85 $ 77
Noncurrent liabilities reported within Regulatory liabilities, deferred income, and other
1,300 1,288
Total regulatory liabilities $ 1,385 $ 1,365
Transco
December 31,
2024 2023
(Millions)
Current regulatory assets:
Fuel recovery $ 47 $ 60
ARO 16 16
Deferred cash out 6 6
ARO - Eminence 5 5
Total current regulatory assets 74 87
Long-term regulatory assets:
ARO 243 209
Grossed-up deferred taxes on equity AFUDC 29 31
ARO - Eminence 15 20
Slug catcher 6 6
Deferred cash out — 11
Other 27 22
Total long-term regulatory assets 320 299
Total regulatory assets $ 394 $ 386
Current regulatory liabilities:
Deferred taxes - liability $ 31 $ 31
Postretirement benefits other than pension — 8
Electric power cost 26 7
Pension — 2
Other 1 1
Total current regulatory liabilities 58 49
Long-term regulatory liabilities:
Negative salvage 632 605
Deferred taxes - liability 252 283
Postretirement benefits other than pension 31 23
Pension 30 24
Sentinel meter station depreciation 7 7
Other 24 14
Total long-term regulatory liabilities 976 956
Total regulatory liabilities $ 1,034 $ 1,005
NWP
December 31,
2024 2023
(Millions)
Current regulatory assets:
Fuel recovery $ 4 $ —
Levelized depreciation 2 2
Total current regulatory assets 6 2
Long-term regulatory assets:
Levelized depreciation 7 10
Grossed-up deferred taxes on equity AFUDC 4 4
Washington State Carbon and Greenhouse Gas Tax 38 22
Total long-term regulatory assets
49 36
Total regulatory assets $ 55 $ 38
Current regulatory liabilities:
Deferred taxes - liability $ 20 $ 20
Fuel recovery — 1
Total current regulatory liabilities 20 21
Long-term regulatory liabilities:
Deferred taxes - liability 160 179
Postretirement benefits other than pension 43 42
Negative salvage - net 30 31
Total long-term regulatory liabilities 233 252
Total regulatory liabilities $ 253 $ 273

v3.25.0.1

Goodwill and Other Intangible Assets (Tables)
12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]
Changes in the carrying amount of goodwill, included in Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, by reportable segment for the years indicated are as follows:
Transmission & Gulf of America
West
Total
(Millions)
December 31, 2022 $ — $ — $ —
MountainWest Acquisition (Note 3)
400 — 400
Cureton Acquisition (Note 3)
— 6 6
RMM Acquisition (Note 3)
— 57 57
December 31, 2023 400 63 463
Cureton Acquisition (Note 3)
— 5 5
RMM Acquisition (Note 3)
— (2) (2)
December 31, 2024 $ 400 $ 66 $ 466

Schedule of Finite-Lived Intangible Assets [Table Text Block]
The gross carrying amount and accumulated amortization of other intangible assets, included in Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, at December 31 are as follows:
2024 2023
Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization
(Millions)
Customer relationships $ 10,239 $ (3,523) $ 10,237 $ (3,155)
Transportation and storage capacity contracts 267 (244) 267 (223)
Other
6 (2) 6 (2)
Other intangible assets
$ 10,512 $ (3,769) $ 10,510 $ (3,380)

v3.25.0.1

Other Current Liabilities (Tables)
12 Months Ended

Dec. 31, 2024

Accrued Liabilities, Current [Abstract]

Other Current Liabilities [Table Text Block]
Williams
December 31,
2024 2023
(Millions)
Interest on debt $ 350 $ 322
Employee costs 285 197
Contract liabilities (Note 5) 170 159
Alaska refinery contamination litigation (Note 1) — 134
Asset retirement obligations (Note 9) 91 106
Regulatory liabilities (Note 10) 85 77
Operating lease liabilities (Note 14) 26 24
Other, including accrued loss contingencies 353 265
$ 1,360 $ 1,284

Transco
December 31,
2024 2023
(Millions)
Interest on debt $ 76 $ 76
Contract liabilities 10 10
Customer deposits 38 35
Other 57 69
$ 181 $ 190

NWP
December 31,
2024 2023
(Millions)
Interest on debt $ 6 $ 6
Taxes, other than income taxes 8 7
Contract liabilities — 1
Transportation and gas exchange payables 10 5
Other 10 15
$ 34 $ 34

v3.25.0.1

Debt and Banking Arrangements (Tables)
12 Months Ended

Dec. 31, 2024

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]
Long-Term Debt by Issuing Entity
December 31,
2024 2023

(Millions)
Transco:
7.08% Debentures due 2026
$ 8 $ 8
7.25% Debentures due 2026
200 200
7.85% Notes due 2026
1,000 1,000
4% Notes due 2028
400 400
3.25% Notes due 2030
700 700
5.4% Notes due 2041
375 375
4.45% Notes due 2042
400 400
4.6% Notes due 2048
600 600
3.95% Notes due 2050
500 500
Other financing obligation — Atlantic Sunrise 764 790
Other financing obligation — Leidy South 75 76
Other financing obligation — Dalton 247 250
Unamortized debt issuance costs
(23) (26)
Net unamortized debt premium (discount)
(11) (12)
Total debt — Transco
$ 5,235 $ 5,261
MountainWest:
3.53% Notes due 2028 (Note 3)
$ 100 $ 100
3.91% Notes due 2038 (Note 3)
150 150
4.875% Notes due 2041 (Note 3)
180 180
Net unamortized debt premium (discount)
(58) (61)
Total debt — MountainWest
$ 372 $ 369
NWP:
7.125% Debentures due 2025
$ 85 $ 85
4% Notes due 2027
500 500
Unamortized debt issuance costs
(1) (2)
Net unamortized debt premium (discount)
(2) (2)
Total debt — NWP
$ 582 $ 581
Williams:
4.3% Notes due 2024
$ — $ 1,000
4.55% Notes due 2024
— 1,250
3.9% Notes due 2025
750 750
4% Notes due 2025
750 750
5.4% Notes due 2026
1,100 1,100
7.7% Notes due 2027
2 2
3.75% Notes due 2027
1,450 1,450
5.3% Notes due 2028
900 900
4.9% Notes due 2029
1,100 —
4.8% Notes due 2029
450 —
3.5% Notes due 2030
1,000 1,000
2.6% Notes due 2031
1,500 1,500
7.5% Debentures due 2031
339 339
7.75% Notes due 2031
252 252
8.75% Notes due 2032
445 445
4.65% Notes due 2032
1,000 1,000
5.65% Notes due 2033
750 750
5.15% Notes due 2034
1,300 —
6.3% Notes due 2040
1,250 1,250
5.8% Notes due 2043
400 400
December 31,
2024 2023

(Millions)
5.4% Notes due 2044
500 500
5.75% Notes due 2044
650 650
4.9% Notes due 2045
500 500
5.1% Notes due 2045
1,000 1,000
4.85% Notes due 2048
800 800
3.5% Notes due 2051
650 650
5.3% Notes due 2052
750 750
5.8% Notes due 2054
750 —
Unamortized debt issuance costs
(130) (112)
Net unamortized debt premium (discount)
(41) (39)
Total debt — Williams
$ 20,167 $ 18,837
RMM deferred consideration obligation (Note 3) — 665
Gulf Coast Storage deferred consideration obligation (Note 3)
100 —
Total debt
$ 26,456 $ 25,713
Long-term debt due within one year — Williams
(1,600) (2,305)
Long-term debt due within one year — Transco
(35) (32)
Long-term debt due within one year — NWP
(85) —
Long-term debt $ 24,736 $ 23,376

Schedule of Maturities of Long-term Debt [Table Text Block]
The following table presents aggregate minimum maturities of long-term debt, other financing obligations, and the Gulf Coast Storage deferred consideration obligation, excluding net unamortized debt premium (discount) and debt issuance costs, for each of the next five years:
December 31, 2024
(Millions)
Williams:
2025 $ 1,720
2026 2,345
2027 1,994
2028 1,445
2029 1,600
Transco:
2025 $ 35
2026 1,245
2027 41
2028 445
2029 50
NWP:
2025 $ 85
2027 500

Schedule of Debt Issuances
Williams senior unsecured public debt issuances for the past three years and subsequent to the balance sheet date are as follows:
Issue Date
Maturity Date
Amount
Rate
(Millions)
January 9, 2025
March 15, 2035 $ 1,000 5.600%
January 9, 2025
March 15, 2055 500 6.000%
August 13, 2024 November 15, 2029 450 4.800%
August 13, 2024 (1) March 15, 2034 300 5.150%
August 13, 2024 November 15, 2054 750 5.800%
January 5, 2024 March 15, 2029 1,100 4.900%
January 5, 2024 March 15, 2034 1,000 5.150%
August 10, 2023 (2) March 2, 2026 350 5.400%
August 10, 2023 August 15, 2028 900 5.300%
March 2, 2023 March 2, 2026 750 5.400%
March 2, 2023 March 15, 2033 750 5.650%
August 8, 2022 August 15, 2032 1,000 4.650%
August 8, 2022 August 15, 2052 750 5.300%
________________
(1)    Additional issuance of the 5.15 percent senior notes due 2034 issued on January 5, 2024, and trade interchangeably with such notes.
(2)    Additional issuance of the 5.40 percent senior notes due 2026 issued on March 2, 2023, and trade interchangeably with such notes.

Schedule of Extinguishment of Debt
Williams’ senior unsecured public debt retirements for the past three years and subsequent to the balance sheet date are as follows:
Date of Retirement
Maturity Date
Amount
Rate
(Millions)
January 15, 2025 January 15, 2025 $ 750 3.900%
June 24, 2024 June 24, 2024 1,250 4.550%
March 4, 2024 March 4, 2024 1,000 4.300%
November 15, 2023 November 15, 2023 600 4.500%
October 17, 2022 January 15, 2023 850 3.700%
May 16, 2022 August 15, 2022 750 3.350%
January 18, 2022 March 15, 2022 1,250 3.600%

Schedule of Line of Credit Facilities [Table Text Block]
Credit Facility
December 31, 2024
Stated Capacity Outstanding
(Millions)
Long-term credit facility (1) $ 3,750 $ —
Letters of credit under certain bilateral bank agreements 15
________________
(1)    In managing its available liquidity, Williams does not expect a maximum outstanding amount in excess of the capacity of its credit facility inclusive of any outstanding amounts under the commercial paper program.

Interest Income and Interest Expense Disclosure
Cash Payments for Interest by Registrant (Net of Amounts Capitalized)
Year Ended December 31,
2024 2023 2022
(Millions)
Williams $ 1,293 $ 1,152 $ 1,117
Transco 302 307 326
NWP 24 26 26

v3.25.0.1

Leases (Tables)
12 Months Ended

Dec. 31, 2024

Leases [Abstract]

Lease, Cost [Table Text Block]
Williams
Year Ended December 31,
2024 2023 2022
(Millions)
Lease Cost:
Operating lease cost $ 39 $ 38 $ 34
Variable lease cost 31 31 26
Sublease income — (1) —
Total lease cost $ 70 $ 68 $ 60
Cash paid for operating lease liabilities $ 37 $ 37 $ 33
December 31,
2024 2023
(Dollars in Millions)
Other Information:
Right-of-use assets (included in Regulatory assets, deferred charges, and other)
$ 154 $ 159
Operating lease liabilities:
Current (included in Other current liabilities)
$ 26 $ 24
Noncurrent (included in Regulatory liabilities, deferred income, and other)
$ 142 $ 148
Weighted-average remaining lease term – operating leases (years)
11 11
Weighted-average discount rate – operating leases
4.90% 4.78%
Transco
Year Ended December 31,
2024 2023 2022
(Millions)
Lease Cost:
Operating lease cost $ 9 $ 9 $ 9
Variable lease cost 7 7 7
Total lease cost $ 16 $ 16 $ 16
Cash paid for operating lease liabilities $ 9 $ 10 $ 10
December 31,
2024 2023
(Dollars in Millions)
Other Information:
Right-of-use assets (included in Deferred charges and other in Transco’s Balance Sheet)
$ 48 $ 53
Operating lease liabilities:
Current (included in Other current liabilities in Transco’s Balance Sheet)
$ 6 $ 6
Noncurrent (included in Deferred income and other in Transco’s Balance Sheet)
$ 51 $ 56
Weighted-average remaining lease term – operating leases (years) 13 13
Weighted-average discount rate – operating leases 4.77% 4.73%
NWP
Year Ended December 31,
2024 2023 2022
(Millions)
Lease Cost:
Operating lease cost $ 3 $ 1 $ 1
Variable lease cost 1 1 1
Total lease cost $ 4 $ 2 $ 2
Cash paid for operating lease liabilities $ 2 $ 1 $ 1
December 31,
2024 2023
(Dollars in Millions)
Other Information:
Right-of-use assets (included in Deferred charges and other in NWP’s Balance Sheet)
$ 5 $ 9
Operating lease liabilities:
Current (included in Other current liabilities in NWP’s Balance Sheet)
$ 1 $ 1
Noncurrent (included in Deferred income and other in NWP’s Balance Sheet)
$ 5 $ 7
Weighted-average remaining lease term – operating leases (years) 19 15
Weighted-average discount rate – operating leases 4.90% 4.18%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]
At December 31, 2024, the following table represents operating lease maturities, including renewal provisions Williams has assessed as being reasonably certain of exercise, for each of the years ended December 31:
(Millions)
2025 $ 34
2026 33
2027 30
2028 22
2029 19
Thereafter 86
Total future lease payments 224
Less: Amount representing interest 56
Total obligations under operating leases $ 168
As of December 31, 2024, the following table represents operating lease maturities, including renewal provisions that Transco has assessed as being reasonably certain of exercise, for each of the years ended December 31:
(Millions)
2025 $ 9
2026 9
2027 10
2028 10
2029 10
Thereafter 32
Total future lease payments 80
Less: Amount representing interest 23
Total obligations under operating leases $ 57
As of December 31, 2024, the following table represents operating lease maturities, including renewal provisions that NWP has assessed as being reasonably certain of exercise, for each of the years ended December 31:
(Millions)
2025 $ 1
2026 —
2027 1
2028 —
2029 1
Thereafter 6
Total future lease payments 9
Less: Amount representing interest 3
Total obligations under operating leases $ 6

v3.25.0.1

Fair Value Measurements, Guarantees, and Concentration of Credit Risk (Tables)
12 Months Ended

Dec. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value Assets and Liabilities Measured On Recurring Basis [Table Text Block]
The following table presents, by level within the fair value hierarchy, certain of Williams’, Transco’s, and NWP’s significant financial assets and liabilities. The carrying values of cash and cash equivalents, accounts receivable, accounts payable, and commercial paper approximate fair value because of the short-term nature of these instruments. Therefore, these assets and liabilities are not presented in the following table.
Fair Value Measurements Using
Carrying
Amount Fair
Value Quoted
Prices In
Active
Markets for
Identical
Assets
(Level 1) Significant
Other
Observable
Inputs
(Level 2) Significant
Unobservable
Inputs
(Level 3)
(Millions)
Assets (liabilities) at December 31, 2024:
Measured on a recurring basis:
ARO Trust investments - Transco
$ 297 $ 297 $ 297 $ — $ —
Commodity derivative assets (1)
344 726 427 188 111
Commodity derivative liabilities (1)
(400) (1,070) (532) (475) (63)
Additional disclosures:
Debt by issuer, including current portion:
Williams
(20,167) (19,517) — (19,517) —
Transco (5,235) (5,276) — (5,276) —
NWP (582) (573) — (573) —
MountainWest (372) (364) — (364) —
Gulf Coast Storage deferred consideration obligation (Note 3)
(100) (100) — (100) —
Total debt
(26,456) (25,830) — (25,830) —
Guarantees (36) (28) — (12) (16)
Assets (liabilities) at December 31, 2023:
Measured on a recurring basis:
ARO Trust investments - Transco
$ 269 $ 269 $ 269 $ — $ —
Commodity derivative assets (1)(2)
314 866 514 196 156
Commodity derivative liabilities (1)(2)
(287) (841) (376) (362) (103)
Interest rate derivatives
6 6 — 6 —
Additional disclosures:
Debt by issuer, including current portion:
Williams
(18,837) (18,494) — (18,494) —
Transco (5,261) (5,438) — (5,438) —
NWP (581) (581) — (581) —
MountainWest (369) (375) — (375) —
RMM deferred consideration obligation (Note 3)
(665) (665) — (665) —
Total debt
(25,713) (25,553) — (25,553) —
Guarantees (37) (28) — (12) (16)
(1)The carrying amount is presented net of counterparty offsetting arrangements and collateral (see Note 17 – Commodity Derivatives).
(2)Previously, the fair value of Williams’ commodity derivative assets and liabilities were disclosed by level within the fair value hierarchy net of counterparty offsetting arrangements. The December 31, 2023, amounts have been corrected to disclose the fair values by level on a gross basis, as presented above.

Debt Securities, Trading, and Equity Securities, FV-NI
Transco investments within the ARO Trust were as follows:
December 31, 2024 December 31, 2023
Amortized Cost Basis
Fair Value
Amortized Cost Basis
Fair Value
(Millions)
Money Market Funds
$ 27 $ 27 $ 26 $ 26
U.S. Equity Funds
53 146 53 120
International Equity Funds
32 40 32 39
Municipal Bond Funds
88 84 87 84
Total
$ 200 $ 297 $ 198 $ 269

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation
The following table presents a reconciliation of changes in fair value of the net commodity derivatives classified as Level 3 in the fair value hierarchy.
Year Ended December 31,
2024 2023
(Millions)
Balance at beginning of period $ 53 $ (56)
Gains (losses) included in Williams’ Consolidated Statement of Income
(5) 91
Purchases, issuances, and settlements (1) 20
Transfers into Level 3 1 —
Transfers out of Level 3 — (2)
Balance at end of period $ 48 $ 53

Contract With Customer Accounts Receivable
The following table summarizes Williams’ concentration of receivables, net of allowances:
December 31,
2024 2023
(Millions)
NGLs, natural gas, and related products and services $ 594 $ 589
Regulated interstate natural gas transportation and storage 339 310
Marketing of natural gas and NGLs 516 321
Upstream activities 45 72
Accounts receivable related to revenues from contracts with customers
1,494 1,292
Receivables from derivatives 294 311
Other accounts receivable 75 52
Trade accounts and other receivables - net $ 1,863 $ 1,655

Fair Value, Concentration of Risk
Customers representing 10 percent or more of Transco’s and NWP’s revenues include:
Year Ended December 31,
2024 2023 2022
(Millions)
Transco:
Dominion Energy, Inc (1) $ 217 $ 287 $ 293
NWP:
Puget Sound Energy, Inc. $ 136 $ 126 $ 131
Cascade Natural Gas Corporation 46 47 49
Northwest Natural Gas Company 47 47 49
_______________
(1) The 2024 amount is less than 10 percent of Transco’s revenue.

v3.25.0.1

Commodity Derivatives (Tables)
12 Months Ended

Dec. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments
At December 31, 2024, the notional volume of the net long (short) positions for Williams’ commodity derivative contracts were as follows:
Commodity Unit of Measure Net Long (Short) Position
Index Risk Natural Gas MMBtu 592,842,257
Central Hub Risk - Henry Hub Natural Gas MMBtu (50,513,793)
Basis Risk Natural Gas MMBtu 13,306,615
Central Hub Risk - Mont Belvieu Natural Gas Liquids Barrels (2,561,000)
Basis Risk Natural Gas Liquids Barrels (205,000)
Central Hub Risk - WTI Crude Oil Barrels (480,000)

Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location
The fair value of commodity derivatives, which are not designated as hedging instruments for accounting purposes, is reflected as follows:
December 31,
2024 December 31,
2023
Commodity Derivatives Categories
Assets (Liabilities) Assets (Liabilities)
(Millions)
Current $ 508 $ (635) $ 623 $ (496)
Noncurrent 218 (435) 243 (345)
Total commodity derivatives
$ 726 $ (1,070) $ 866 $ (841)
Counterparty and collateral netting offset (382) 670 (552) 554
Amounts recognized in Williams’ Consolidated Balance Sheet $ 344 $ (400) $ 314 $ (287)
The pre-tax impacts of Williams’ commodity derivatives, which are not designated as hedging instruments for accounting purposes, are reflected as follows:
Year Ended December 31,
2024 2023 2022
(Millions)
Net gain (loss) from commodity derivatives within Total revenues:
Realized
$ 111 $ 253 $ (91)
Unrealized
(361) 703 (296)
$ (250) $ 956 $ (387)
Net gain (loss) from commodity derivatives within Net processing commodity expenses:
Realized
$ (8) $ (4) $ 16
Unrealized
(6) (43) 47
$ (14) $ (47) $ 63
Total net gain (loss) from commodity derivatives
$ (264) $ 909 $ (324)

v3.25.0.1

Segment Disclosures (Tables)
12 Months Ended

Dec. 31, 2024

Segment Reporting [Abstract]

Reconciliation of revenue from segment to consolidated [Table Text Block]
The following tables present revenues, Modified EBITDA, significant expenses, and certain segment assets measures, as well as reconciliations to the consolidated totals:
Transmission & Gulf of America Northeast G&P West Gas & NGL Marketing Services (1) Total
(Millions)
2024
Segment revenues:
Service revenues
External $ 4,157 $ 1,900 $ 1,558 $ — $ 7,615
Internal 89 13 160 — 262
Total service revenues 4,246 1,913 1,718 — 7,877
Total service revenues – commodity consideration 54 2 78 — 134
Product sales
External 144 24 178 2,500 2,846
Internal 184 86 691 (448) 513
Total product sales 328 110 869 2,052 3,359
Net gain (loss) from commodity derivatives
Realized — — 4 72 76
Unrealized — — — (335) (335)
Total net gain (loss) from commodity derivatives (2) — — 4 (263) (259)
Total revenues of reportable segments $ 4,628 $ 2,025 $ 2,669 $ 1,789 $ 11,111
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities 470
Net unrealized gain (loss) from commodity derivatives for upstream operations
(26)
Eliminations (1,052)
Total consolidated revenues $ 10,503
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses (329) (88) (844) (1,799)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses — — — (6)
Operating and administrative expenses (3)
(1,104) (441) (591) (108)
Recoverable power, transportation, and storage costs (4)
(250) (143) (49) —
Other segment income (expenses) - net (5)
155 3 (5) —
Proportional Modified EBITDA of equity-method investments 173 602 132 —
Modified EBITDA of reportable segments $ 3,273 $ 1,958 $ 1,312 $ (124) $ 6,419
Modified EBITDA from upstream operations, corporate, and other business activities 237
Total consolidated Modified EBITDA $ 6,656
Reconciliation of Modified EBITDA:
Depreciation and amortization expenses $ (2,219)
Equity earnings (losses) 560
Other investing income (loss) - net 343
Interest expense (1,364)
Accretion expense associated with AROs for nonregulated operations
(81)
Proportional Modified EBITDA of equity-method investments (909)
Income (loss) before income taxes from continuing operations $ 2,986
Equity-method investments by reportable segment $ 272 $ 3,346 $ 476 $ — $ 4,094
Other equity-method investments
13
Total equity-method investments $ 4,107
Segment assets $ 23,149 $ 12,918 $ 12,144 $ 46 $ 48,257
Total current assets 2,661
Regulatory assets, deferred charges, and noncurrent assets 1,830
Assets of upstream operations, corporate, and other business activities 1,784
Total assets $ 54,532
Additions to long-lived segment assets
$ 4,399 $ 210 $ 529 $ 2 $ 5,140
Additions to long-lived assets of upstream operations, corporate, and other business activities
458
Total additions to long-lived assets
$ 5,598
Transmission & Gulf of America Northeast G&P West Gas & NGL Marketing Services (1) Total
(Millions)
2023
Segment revenues:
Service revenues
External $ 3,766 $ 1,868 $ 1,376 $ 1 $ 7,011
Internal 92 28 126 — 246
Total service revenues 3,858 1,896 1,502 1 7,257
Total service revenues – commodity consideration 38 5 103 — 146
Product sales
External 146 34 80 2,382 2,642
Internal 106 98 361 (322) 243
Total product sales 252 132 441 2,060 2,885
Net gain (loss) from commodity derivatives
Realized 2 — 89 115 206
Unrealized — — — 702 702
Total net gain (loss) from commodity derivatives (2) 2 — 89 817 908
Total revenues of reportable segments
$ 4,150 $ 2,033 $ 2,135 $ 2,878 $ 11,196
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities 505
Net unrealized gain (loss) from commodity derivatives for upstream operations
1
Eliminations (795)
Total consolidated revenues $ 10,907
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses (259) (125) (517) (1,786)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses — — — (43)
Operating and administrative expenses (3)
(1,034) (424) (502) (98)
Recoverable power, transportation, and storage costs (4)
(241) (132) (37) —
Other segment income (expenses) - net (5)
118 (10) (3) (1)
Gain on sale of business (6)
129 — — —
Proportional Modified EBITDA of equity-method investments 205 574 162 —
Modified EBITDA of reportable segments $ 3,068 $ 1,916 $ 1,238 $ 950 $ 7,172
Modified EBITDA from upstream operations, corporate, and other business activities 307
Unallocated Net gain from Energy Transfer litigation judgment (7)
534
Total consolidated Modified EBITDA $ 8,013
Reconciliation of Modified EBITDA:
Depreciation and amortization expenses $ (2,071)
Equity earnings (losses) 589
Other investing income (loss) - net 108
Interest expense (1,236)
Accretion expense associated with AROs for nonregulated operations
(59)
Proportional Modified EBITDA of equity-method investments (939)
Income (loss) before income taxes from continuing operations $ 4,405
Equity-method investments by reportable segment $ 652 $ 3,477 $ 477 $ — $ 4,606
Other equity-method investments
8
Total equity-method investments $ 4,614
Segment assets $ 19,705 $ 13,319 $ 12,188 $ 77 $ 45,289
Total current assets 4,513
Regulatory assets, deferred charges, and noncurrent assets 1,573
Assets of upstream operations, corporate, and other business activities 1,252
Total assets $ 52,627
Additions to long-lived segment assets
$ 2,501 $ 340 $ 1,186 $ 7 $ 4,034
Additions to long-lived assets of upstream operations, corporate, and other business activities
279
Total additions to long-lived assets
$ 4,313
Transmission & Gulf of America Northeast G&P West Gas & NGL Marketing Services (1) Total
(Millions)
2022
Segment revenues:
Service revenues
External $ 3,461 $ 1,613 $ 1,443 $ 3 $ 6,520
Internal 118 41 99 — 258
Total service revenues 3,579 1,654 1,542 3 6,778
Total service revenues – commodity consideration 64 14 182 — 260
Product sales
External 228 28 145 4,052 4,453
Internal 176 106 696 (518) 460
Total product sales 404 134 841 3,534 4,913
Net gain (loss) from commodity derivatives
Realized — — (4) 17 13
Unrealized — — — (321) (321)
Total net gain (loss) from commodity derivatives (2) — — (4) (304) (308)
Total revenues of reportable segments
$ 4,047 $ 1,802 $ 2,561 $ 3,233 $ 11,643
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities 626
Net unrealized gain (loss) from commodity derivatives for upstream operations
25
Eliminations (1,329)
Total consolidated revenues $ 10,965
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses (425) (138) (918) (3,228)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses — — — 47
Operating and administrative expenses (3)
(906) (384) (507) (96)
Recoverable power, transportation, and storage costs (4)
(254) (132) (43) —
Other segment income (expenses) - net (5)
19 (6) (14) 4
Proportional Modified EBITDA of equity-method investments 193 654 132 —
Modified EBITDA of reportable segments $ 2,674 $ 1,796 $ 1,211 $ (40) $ 5,641
Modified EBITDA from upstream operations, corporate, and other business activities 434
Total consolidated Modified EBITDA $ 6,075
Reconciliation of Modified EBITDA:
Depreciation and amortization expenses $ (2,009)
Equity earnings (losses) 637
Other investing income (loss) - net 16
Interest expense (1,147)
Accretion expense associated with AROs for nonregulated operations
(51)
Proportional Modified EBITDA of equity-method investments (979)
Income (loss) before income taxes from continuing operations $ 2,542
Equity-method investments by reportable segment $ 629 $ 3,566 $ 843 $ — $ 5,038
Other equity-method investments
10
Total equity-method investments $ 5,048
Segment assets $ 17,795 $ 13,539 $ 10,710 $ 130 $ 42,174
Total current assets 3,797
Regulatory assets, deferred charges, and noncurrent assets 1,319
Assets of upstream operations, corporate, and other business activities 1,143
Total assets $ 48,433
Additions to long-lived segment assets
$ 1,420 $ 261 $ 1,507 $ 4 $ 3,192
Additions to long-lived assets of upstream operations, corporate, and other business activities
406
Total additions to long-lived assets
$ 3,598
_______________________
(1)    As Williams is acting as agent for natural gas marketing customers or engages in energy trading activities, the resulting revenues are presented net of the related costs of those activities.
(2)    Williams records transactions that qualify as commodity derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses from commodity derivatives held for energy trading purposes are presented on a net basis in revenue.
(3)     Segment operating and administrative expenses primarily include payroll, maintenance and operating costs and taxes, and general and administrative expenses, including acquisition and transition-related expenses. It also includes project execution, information technology, finance and accounting, real estate and aviation, central engineering services, safety and operational discipline, supply chain and digital transformation, corporate strategic development, human resources, legal and government affairs, and executive and audit support services costs which are centrally managed and allocated to segments.
(4)     Recoverable power, transportation and storage costs are charges incurred which are reimbursable pursuant to FERC stipulations or customer contracts.
(5)    Other segment income (expenses) primarily includes equity AFUDC and regulatory credits and charges related to Williams’ regulated operations.
(6)    Gain on sale of business reflects a gain recognized on the sale of certain liquids pipelines in the Gulf Coast region in September 2023 (see Note 3 – Acquisitions and Divestitures).
(7)    Net gain from Energy Transfer litigation judgment resulted from a favorable ruling in November 2023 (see Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies).

v3.25.0.1

Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Sep. 03, 2021

Retirement Benefits, Description [Abstract]

Accumulated Other Comprehensive Income (Loss), Net of Tax $ 76 $ 0

Threshold For Amortization Of Unrecognized Actuarial Gains Losses 10.00%

Share Repurchase Program [Abstract]

Stock Repurchase Program, Authorized Amount $ 1,500

Purchases of treasury stock $ 0 130 $ 9

Stock Repurchase Program Cumulative Amount Purchased 139

Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]

Retirement Benefits, Description [Abstract]

Accumulated Other Comprehensive Income (Loss), Net of Tax $ 55 (17)

Pension Benefits [Member]

Retirement Benefits, Description [Abstract]

Approximate Amortization Period Of Net Actuarial Gain Loss 9 years

Amortization Period Of Difference Between Expected And Actual Return On Plan Assets 5 years

Other Postretirement Benefits [Member]

Retirement Benefits, Description [Abstract]

Approximate Amortization Period Of Net Actuarial Gain Loss 4 years

Minimum [Member]

Leases [Abstract]

Lessee, Operating Lease, Term of Contract 1 year

Minimum [Member] | Pension Benefits [Member]

Retirement Benefits, Description [Abstract]

Threshold For Market Related Value 90.00%

Maximum [Member]

Leases [Abstract]

Lessee, Operating Lease, Term of Contract 20 years

Maximum [Member] | Pension Benefits [Member]

Retirement Benefits, Description [Abstract]

Threshold For Market Related Value 110.00%

Transcontinental Gas Pipe Line Company, LLC [Member]

Regulated Operations [Abstract]

Public Utilities, Allowance For Funds Used During Construction, Capitalized Cost of Debt $ 17 14 5

Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity 71 63 23

Public Utilities, Allowance for Funds Used During Construction, Additions $ 88 77 28

Transcontinental Gas Pipe Line Company, LLC [Member] | Minimum [Member]

Leases [Abstract]

Lessee, Operating Lease, Term of Contract 1 year

Transcontinental Gas Pipe Line Company, LLC [Member] | Maximum [Member]

Leases [Abstract]

Lessee, Operating Lease, Term of Contract 30 years

Northwest Pipeline LLC [Member]

Regulated Operations [Abstract]

Public Utilities, Allowance For Funds Used During Construction, Capitalized Cost of Debt $ 2 1 1

Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity 8 3 2

Public Utilities, Allowance for Funds Used During Construction, Additions $ 10 $ 4 $ 3

Northwest Pipeline LLC [Member] | Minimum [Member]

Leases [Abstract]

Lessee, Operating Lease, Term of Contract 1 year

Northwest Pipeline LLC [Member] | Maximum [Member]

Leases [Abstract]

Lessee, Operating Lease, Term of Contract 30 years

v3.25.0.1

Divestitures (Details) - USD ($)
$ in Millions
12 Months Ended

Sep. 29, 2023

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Business Acquisition [Line Items]

Gain (Loss) on Disposition of Business $ 0 $ 129 $ 0

Transmission And Gulf Of America [Member] | Certain Gulf Coast Liquids Pipelines

Business Acquisition [Line Items]

Disposal Group, Consideration $ 348

Gain (Loss) on Disposition of Business $ 129

v3.25.0.1

Related Party Transactions - Williams (Details) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Related Party Transaction [Line Items]

Operating Costs and Expenses $ 2,179 $ 1,984 $ 1,817

Accounts payable 1,613 1,379

Revenues 10,503 10,907 10,965

Investee

Related Party Transaction [Line Items]

Operating Costs and Expenses 266 776 1,300

Other Operating Income 2 5 76

Accounts Receivable, after Allowance for Credit Loss, Current 1 2

Accounts payable 19 33

OperatingFeesAndCostsBilledToThirdParty 52 64 65

Director

Related Party Transaction [Line Items]

Revenues 59 90 180

Cost of Revenue $ 40 $ 25 $ 86

v3.25.0.1

Provision (Benefit) for Income Taxes Tax Provison (Benefit) Table (Details) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Current :

Federal $ 125 $ 3 $ (25)

State 9 21 19

Total 134 24 (6)

Deferred:

Federal 472 872 424

State 34 109 7

Total 506 981 431

Less: Provision (benefit) for income taxes $ 640 $ 1,005 $ 425

v3.25.0.1

Provision (Benefit) for Income Taxes Reconciliations to Recorded Tax Provision (Benefit) Table (Details) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Effective Income Tax Rate Reconciliation [Abstract]

Provision (benefit) at statutory rate $ 627 $ 925 $ 534

Increases (decreases) in taxes resulting from:

State income taxes (net of federal benefit) 79 129 113

State deferred income tax rate change (44) (25) (92)

Federal valuation allowance 0 0 (70)

Federal settlements 0 0 (45)

Impact of nontaxable noncontrolling interests (25) (26) (14)

Other – net 3 2 (1)

Less: Provision (benefit) for income taxes $ 640 $ 1,005 $ 425

v3.25.0.1

Provision (Benefit) for Income Taxes Deferred Tax Table (Details) - USD ($)
$ in Millions

Dec. 31, 2024

Dec. 31, 2023

Gross deferred income tax liabilities:

Property, plant and equipment $ 4,501 $ 3,541

Investments 1,733 1,740

Other 193 146

Total gross deferred income tax liabilities 6,427 5,427

Gross deferred income tax assets:

Accrued liabilities 1,146 868

Corporate alternative minimum tax credits 108 0

Foreign tax credits 0 35

Federal loss carryovers 325 398

Disallowed business interest expense carryforward 247 67

State losses and credits 224 293

Other 92 103

Total gross deferred income tax assets 2,142 1,764

Less valuation allowance 91 183

Net deferred income tax assets 2,051 1,581

Deferred income tax liabilities $ 4,376 $ 3,846

v3.25.0.1

Provision (Benefit) for Income Taxes Textuals (Details) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Income Tax Contingency [Line Items]

State deferred income tax rate change $ (44) $ (25) $ (92)

Deferred Tax Assets, Tax Credit Carryforwards, Foreign, Expired 35

Income Taxes Paid 68 31 13

Total interest and penalties accrued as uncertain tax positions $ 0 0

Internal Revenue Service (IRS) [Member]

Income Tax Contingency [Line Items]

Income Taxes Paid $ 5

Tax Adjustments, Settlements, and Unusual Provisions 45

Proceeds from Income Tax Refunds $ 7

v3.25.0.1

EBPs Funded Status (Details) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Defined Contribution Plan

Percentage of eligible compensation the employer will match of employee contributions 6.00%

Employer's contributions charged to expense under defined contribution plan $ 69 $ 60 $ 53

Pension Benefits [Member]

Change in benefit obligation:

Benefit obligation at beginning of year 1,006 940

Service cost 25 23 28

Interest cost 47 46 31

Plan participants’ contributions 0 0

Benefits paid (73) (71)

Net actuarial loss (gain) (1) ^[1] (65) 68

Settlements (3) 0

Net increase (decrease) in benefit obligation (69) 66

Benefit obligation at end of year 937 1,006 940

Other Postretirement Benefits [Member]

Change in benefit obligation:

Benefit obligation at beginning of year 145 152

Service cost 1 1 1

Interest cost 7 7 6

Plan participants’ contributions 2 2

Benefits paid (11) (13)

Net actuarial loss (gain) (1) ^[1] (12) (4)

Settlements 0 0

Net increase (decrease) in benefit obligation (13) (7)

Benefit obligation at end of year $ 132 $ 145 $ 152

[1] 2024 amounts are due primarily to changes in the following factors: Pension Benefits - discount rate assumptions and interest crediting rate assumption; Other Postretirement Benefits - discount rate assumption. 2023 amounts are due primarily to changes in the following factors: Pension Benefits - interest crediting rate assumption and discount rate assumptions.

v3.25.0.1

EBP Asset rollforward and B.S. classification (Details 1) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Amounts included in regulatory liabilities associated with Transco and Northwest Pipeline:

Net regulatory liabilities $ 139 $ 123

Pension Benefits [Member]

Change in plan assets:

Fair value of plan assets at beginning of year 1,167 1,117

Actual return on plan assets 88 120

Employer contributions 4 1

Plan participants’ contributions 0 0

Benefits paid (73) (71)

Settlements (3) 0

Net increase (decrease) in fair value of plan assets 16 50

Fair value of plan assets at end of year 1,183 1,167

Funded status — overfunded (underfunded) 246 161

Amounts recognized in the Consolidated Balance Sheet:

Noncurrent assets 270 187

Current liabilities (4) (4)

Noncurrent liabilities (20) (22)

Funded status - overfunded (underfunded) 246 161

Accumulated benefit obligation 929 998

Plans with a projected benefit obligation in excess of plan assets:

Projected benefit obligation 23 26

Plans with an accumulated benefit obligation in excess of plan assets:

Accumulated benefit obligation 22 24

Fair value of plan assets 0 0

Amounts recognized in Accumulated other comprehensive income (loss):

Net actuarial gain (loss) 49 (45)

Other Postretirement Benefits [Member]

Change in plan assets:

Fair value of plan assets at beginning of year 262 253

Actual return on plan assets 16 17

Employer contributions 3 3

Plan participants’ contributions 2 2

Benefits paid (11) (13)

Settlements 0 0

Net increase (decrease) in fair value of plan assets 10 9

Fair value of plan assets at end of year 272 262

Funded status — overfunded (underfunded) 140 117

Amounts recognized in the Consolidated Balance Sheet:

Noncurrent assets 143 120

Current liabilities (3) (3)

Noncurrent liabilities 0 0

Funded status - overfunded (underfunded) 140 117

Amounts recognized in Accumulated other comprehensive income (loss):

Net actuarial gain (loss) $ 20 $ 19

v3.25.0.1

EBP Net Periodic Benefit Cost & OCI (Details 2) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Pension Benefits [Member]

Components of net periodic benefit cost (credit):

Service cost $ 25 $ 23 $ 28

Interest cost 47 46 31

Expected return on plan assets (60) (57) (44)

Amortization of net actuarial loss (gain) 0 5 12

Net actuarial loss from settlements 1 0 3

Reclassification to regulatory liability 0 0 0

Net periodic benefit cost (credit) (1) ^[1] 13 17 30

Items Recognized in Other Comprehensive Income (Loss)

Net actuarial gain (loss) arising during the year 93 (5) (14)

Amortization of net actuarial loss (gain) 0 5 12

Net actuarial loss from settlements 1 0 3

Total recognized in Other comprehensive income (loss) 94 0 1

Other Postretirement Benefits [Member]

Components of net periodic benefit cost (credit):

Service cost 1 1 1

Interest cost 7 7 6

Expected return on plan assets (11) (10) (10)

Amortization of net actuarial loss (gain) (5) (3) 0

Net actuarial loss from settlements 0 0 0

Reclassification to regulatory liability 0 0 1

Net periodic benefit cost (credit) (1) ^[1] (8) (5) (2)

Items Recognized in Other Comprehensive Income (Loss)

Net actuarial gain (loss) arising during the year 3 3 14

Amortization of net actuarial loss (gain) (2) (2) 0

Net actuarial loss from settlements 0 0 0

Total recognized in Other comprehensive income (loss) $ 1 $ 1 $ 14

[1] Components other than Service cost are included in Other income (expense) – net below Operating income (loss) in Williams’ Consolidated Statement of Income.

v3.25.0.1

EBP Key Assumptions (Details 3)
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Pension Benefits [Member]

Weighted average assumptions utilized to determine benefit obligations

Discount rate 5.60% 4.98% 5.16%

Rate of compensation increase 3.48% 3.52% 3.58%

Cash balance interest crediting rate 4.00% 4.50% 3.50%

Weighted average assumptions utilized to determine net periodic benefit cost (credit)

Discount rate 4.98% 5.16% 2.84%

Expected long-term rate of return on plan assets 5.31% 5.17% 3.81%

Rate of compensation increase 3.52% 3.58% 3.67%

Cash balance interest crediting rate 4.50% 3.50% 3.00%

Other Postretirement Benefits [Member]

Weighted average assumptions utilized to determine benefit obligations

Discount rate 5.67% 5.01% 5.20%

Weighted average assumptions utilized to determine net periodic benefit cost (credit)

Discount rate 5.01% 5.20% 2.93%

Expected long-term rate of return on plan assets 4.16% 4.04% 3.67%

Health care cost trend rate assumed for next fiscal year 9.20%

Direction and pattern of change for assumed health care cost trend rate decreases

Ultimate health care cost trend rate 4.50%

Year that rate reaches ultimate trend rate 2034

v3.25.0.1

EBP Benefit Pymts & Employer Contributions (Details 5)
$ in Millions

Dec. 31, 2024

USD ($)

Pension Benefits [Member]

Expected benefit payments

2025 $ 101

2026 95

2027 91

2028 87

2029 83

2030-2034 389

Expected total plans contribution, approximate 1

Other Postretirement Benefits [Member]

Expected benefit payments

2025 11

2026 11

2027 11

2028 11

2029 10

2030-2034 48

Expected total plans contribution, approximate $ 3

v3.25.0.1

Regulatory Assets and Liabilities - Williams (Details) - USD ($)
$ in Millions

Dec. 31, 2024

Dec. 31, 2023

Regulatory Liability [Line Items]

Total regulatory assets $ 666 $ 622

Regulatory Liability, Current 85 77

Total regulatory liabilities 1,385 1,365

Other current assets and deferred charges [Member]

Regulatory Liability [Line Items]

Regulatory Assets, Current 84 95

Regulatory assets, deferred charges, and other [Member]

Regulatory Liability [Line Items]

Regulatory Assets, Noncurrent 582 527

Other Current Liabilities

Regulatory Liability [Line Items]

Regulatory Liability, Current 85 77

Regulatory liabilities, deferred income, and other [Member]

Regulatory Liability [Line Items]

Regulatory Liabilities, Noncurrent $ 1,300 $ 1,288

v3.25.0.1

Long-Term Debt Maturities (Details)
$ in Millions

Dec. 31, 2024

USD ($)

Debt Instrument [Line Items]

2025 $ 1,720

2026 2,345

2027 1,994

2028 1,445

2029 1,600

Transcontinental Gas Pipe Line Company, LLC [Member]

Debt Instrument [Line Items]

2025 35

2026 1,245

2027 41

2028 445

2029 50

Northwest Pipeline LLC [Member]

Debt Instrument [Line Items]

2025 85

2027 $ 500

v3.25.0.1

Cash Payments For Interest (Net of Amounts Capitalized) (Details) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Williams Companies Inc [Member]

Debt Instrument [Line Items]

Cash payments for interest (net of amounts capitalized) $ 1,293 $ 1,152 $ 1,117

Transcontinental Gas Pipe Line Company, LLC [Member]

Debt Instrument [Line Items]

Cash payments for interest (net of amounts capitalized) 302 307 326

Northwest Pipeline LLC [Member]

Debt Instrument [Line Items]

Cash payments for interest (net of amounts capitalized) $ 24 $ 26 $ 26

v3.25.0.1

Equity-Based Compensation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Williams Companies Incentive Plan [Member]

Equity-Based Compensation (Textuals) [Abstract]

Shares authorized for issuance 50,000

Shares reserved for future issuance 17,000

Shares available for future grants 9,000

Equity-based compensation expense $ 99 $ 77 $ 73

Tax benefit from equity-based compensation expense 24 $ 19 $ 18

Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized [Abstract]

Unrecognized equity-based compensation expense $ 70

Unrecognized equity-based compensation expense, Weighted-average period of recognition in years 1 year 8 months 12 days

Williams Companies Incentive Plan [Member] | Nonvested Restricted Stock Units [Member]

Rollforward of nonvested restricted stock unit activity and related information

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 6,400 6,600

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 32.48 $ 28.34

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 3,100 3,800

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 31.77 $ 27.43

Williams Companies Incentive Plan [Member] | Performance Shares [Member]

Rollforward of nonvested restricted stock unit activity and related information

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 1,800

Williams Companies Incentive Plan [Member] | Performance Shares [Member] | Minimum [Member]

Rollforward of nonvested restricted stock unit activity and related information

Range of vested shares based on extent to which certain financial targets are achieved 0.00%

Williams Companies Incentive Plan [Member] | Performance Shares [Member] | Maximum [Member]

Rollforward of nonvested restricted stock unit activity and related information

Range of vested shares based on extent to which certain financial targets are achieved 200.00%

Williams Companies Incentive Plan [Member] | Stock options [Member]

Rollforward of stock option activity and related information

Options, Granted 0 0 0

Options Outstanding, Ending Balance 400

Options Exercisable at Period End 400

Options, Weighted Average Exercise Price, Ending Balance $ 29.99

Options, Weighted Average Exercise Price, Exercisable at Period End $ 29.99

Stock Options Outstanding, Weighted Average Remaining Contractual Life 2 years 4 months 24 days

Stock Options Exercisable, Weighted Average Remaining Contractual Life 2 years 4 months 24 days

Proceeds from Stock Options Exercised $ 5 $ 2

Tax benefits realized on options exercised $ 2 $ 2

Employee Stock Purchase Plan [Member]

Equity-Based Compensation (Textuals) [Abstract]

Shares authorized for issuance 5,200

Shares available for future grants 700

No. of shares purchases by employees 240

Average price of shares purchased $ 33.00

v3.25.0.1

Fair Value Measurements - ARO Trust (Details) - Transcontinental Gas Pipe Line Company, LLC [Member] - USD ($)
$ in Millions

Dec. 31, 2024

Dec. 31, 2023

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI, Cost $ 200 $ 198

Debt Securities, Trading, and Equity Securities, FV-NI 297 269

External Trust

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Transco's annual funding commitment for ARO 16

Cash management funds

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI, Cost 27 26

Debt Securities, Trading, and Equity Securities, FV-NI 27 26

Private Equity Funds, US

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI, Cost 53 53

Debt Securities, Trading, and Equity Securities, FV-NI 146 120

Private Equity Funds, Non-US

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI, Cost 32 32

Debt Securities, Trading, and Equity Securities, FV-NI 40 39

Municipal Bonds

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Debt Securities, Trading, and Equity Securities, FV-NI, Cost 88 87

Debt Securities, Trading, and Equity Securities, FV-NI $ 84 $ 84

v3.25.0.1

Fair Value Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Balance at beginning of period $ 53 $ (56)

Realized and unrealized gains (losses): Included in income (loss) $ (5) $ 91

Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization

Purchases, issuances, and settlements $ (1) $ 20

Transfers into Level 3 1 0

Transfers out of Level 3 0 (2)

Balance at end of period $ 48 $ 53

v3.25.0.1

Commodity Derivatives - Notional Volumes (Details) - Not Designated as Hedging Instrument [Member]

Dec. 31, 2024

MMBTU

Boe

Public Utilities, Inventory, Natural Gas | IndexRisk

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Derivative Nonmonetary Notional Amount Net Long Short Position Volume | MMBTU 592,842,257

Public Utilities, Inventory, Natural Gas | Central Hub Risk

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Derivative Nonmonetary Notional Amount Net Long Short Position Volume | MMBTU (50,513,793)

Public Utilities, Inventory, Natural Gas | Basis Risk

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Derivative Nonmonetary Notional Amount Net Long Short Position Volume | MMBTU 13,306,615

Natural Gas Liquids | Central Hub Risk

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Derivative Nonmonetary Notional Amount Net Long Short Position Volume | Boe (2,561,000)

Natural Gas Liquids | Basis Risk

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Derivative Nonmonetary Notional Amount Net Long Short Position Volume | Boe (205,000)

Crude Oil | Central Hub Risk

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Derivative Nonmonetary Notional Amount Net Long Short Position Volume | Boe (480,000)

v3.25.0.1

Commodity Derivatives - Contingent Features (Details) - USD ($)
$ in Millions

Dec. 31, 2024

Dec. 31, 2023

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Additional Collateral, Aggregate Fair Value $ 6

Collateral Already Posted, Aggregate Fair Value $ 288 $ 2

v3.25.0.1

Segment Disclosures Recon from Segment to Consolidated - Assets and Investments (Details) - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Segment Reporting, Asset Reconciling Item [Line Items]

Equity-method investments $ 4,107 $ 4,614 $ 5,048

Total assets 54,532 52,627 48,433

Current assets 2,661 4,513 3,797

Other Assets, Noncurrent 1,830 1,573 1,319

Payments to Acquire Productive Assets 5,598 4,313 3,598

Operating Segments [Member] | Transmission And Gulf Of America [Member]

Segment Reporting, Asset Reconciling Item [Line Items]

Equity-method investments 272 652 629

Total assets 23,149 19,705 17,795

Payments to Acquire Productive Assets 4,399 2,501 1,420

Operating Segments [Member] | Northeast G And P [Member]

Segment Reporting, Asset Reconciling Item [Line Items]

Equity-method investments 3,346 3,477 3,566

Total assets 12,918 13,319 13,539

Payments to Acquire Productive Assets 210 340 261

Operating Segments [Member] | West [Member]

Segment Reporting, Asset Reconciling Item [Line Items]

Equity-method investments 476 477 843

Total assets 12,144 12,188 10,710

Payments to Acquire Productive Assets 529 1,186 1,507

Operating Segments [Member] | Gas & NGL Marketing Services

Segment Reporting, Asset Reconciling Item [Line Items]

Equity-method investments 0 0 0

Total assets 46 77 130

Payments to Acquire Productive Assets 2 7 4

Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment

Segment Reporting, Asset Reconciling Item [Line Items]

Equity-method investments 4,094 4,606 5,038

Total assets 48,257 45,289 42,174

Payments to Acquire Productive Assets 5,140 4,034 3,192

Corporate, Non-Segment | Other Operating Segment

Segment Reporting, Asset Reconciling Item [Line Items]

Equity-method investments 13 8 10

Total assets 1,784 1,252 1,143

Payments to Acquire Productive Assets $ 458 $ 279 $ 406

v3.25.0.1

Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended

Jan. 28, 2025

Jan. 15, 2025

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Jan. 09, 2025

Subsequent Event [Line Items]

Common Stock, Dividends, Per Share, Declared $ 1.90 $ 1.79 $ 1.70

3.9% Senior Unsecured Notes Due 2025 [Member] | Williams Companies Inc [Member]

Subsequent Event [Line Items]

Long-term debt interest rate 3.90%

Subsequent Event [Member]

Subsequent Event [Line Items]

Common Stock, Dividends, Per Share, Declared $ 0.500

Subsequent Event [Member] | 5.6 Percent Senior Unsecured Notes Due 2035 | Williams Companies Inc [Member]

Subsequent Event [Line Items]

Debt Instrument, Face Amount $ 1,000

Long-term debt interest rate 5.60%

Subsequent Event [Member] | 6.0 Percent Senior Unsecured Notes Due 2055 | Williams Companies Inc [Member]

Subsequent Event [Line Items]

Debt Instrument, Face Amount $ 500

Long-term debt interest rate 6.00%

Subsequent Event [Member] | 3.9% Senior Unsecured Notes Due 2025 [Member] | Williams Companies Inc [Member]

Subsequent Event [Line Items]

Long-term debt interest rate 3.90%

Extinguishment of Debt, Amount $ 750

v3.25.0.1

Schedule II Valuation and Qualifying Accounts (Details) - Deferred Tax Asset Valuation Allowance [Member] - USD ($)
$ in Millions
12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Valuation And Qualifying Accounts

Beginning Balance ^[1] $ 183 $ 200 $ 297

Additions Charged (Credited) To Cost and Expenses (92) (17) (97)

Additions Other 0 0 0

Deductions 0 0 0

Ending Balance ^[1] $ 91 $ 183 $ 200

[1] Deducted from related assets.

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Audit Information	12 Months Ended
Audit Information	Dec. 31, 2024
Auditor [Line Items]
Auditor Name	Ernst & Young LLP
Auditor Location	Tulsa, Oklahoma
Auditor Firm ID	42
Transcontinental Gas Pipe Line Company, LLC [Member]
Auditor [Line Items]
Auditor Name	Ernst & Young LLP
Auditor Location	Houston, Texas
Auditor Firm ID	42
Northwest Pipeline LLC [Member]
Auditor [Line Items]
Auditor Name	Ernst & Young LLP
Auditor Location	Houston, Texas
Auditor Firm ID	42

Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2024	Feb. 20, 2025	Jun. 30, 2024
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Entity Registrant Name	Williams Companies, Inc.
Entity File Number	1-4174
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	73-0569878
Entity Address, Address Line One	One Williams Center
Entity Address, City or Town	Tulsa
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	74172
City Area Code	800
Local Phone Number	945-5426
Title of 12(b) Security	Common Stock, $1.00 par value
Trading Symbol	WMB
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
DocumentFinStmtErrorCorrectionFlag	true
Document Financial Statement Restatement Recovery Analysis [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 49,974,668,630
Entity Common Stock, Shares Outstanding		1,219,369,295
Documents Incorporated by Reference [Text Block]	Portions of the Williams’ Definitive Proxy Statement for the Williams’ Annual Meeting of Stockholders to be held on April 29, 2025, are incorporated into Part III, as specifically set forth in Part III.
Entity Central Index Key	0000107263
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Transcontinental Gas Pipe Line Company, LLC [Member]
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Entity Registrant Name	Transcontinental Gas Pipe Line Company, LLC
Entity File Number	1-7584
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	74-1079400
Entity Address, Address Line One	2800 Post Oak Boulevard
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77056
City Area Code	713
Local Phone Number	215-2000
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
DocumentFinStmtErrorCorrectionFlag	false
Entity Shell Company	false
Entity Public Float			0
Entity Common Stock, Shares Outstanding		0
Entity Central Index Key	0000099250
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Northwest Pipeline LLC [Member]
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Entity Registrant Name	Northwest Pipeline LLC
Entity File Number	1-7414
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-1157701
Entity Address, Address Line One	One Williams Center
Entity Address, City or Town	Tulsa
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	74172
City Area Code	800
Local Phone Number	945-5426
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
DocumentFinStmtErrorCorrectionFlag	false
Entity Shell Company	false
Entity Public Float			$ 0
Entity Common Stock, Shares Outstanding		0
Entity Central Index Key	0000110019
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31

Consolidated Statement of Income - Williams - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Revenues	$ 10,503	$ 10,907	$ 10,965
Costs and expenses:
Operating and maintenance expenses	2,179	1,984	1,817
Depreciation and amortization expenses	2,219	2,071	2,009
Selling, general, and administrative expenses	708	665	636
Gain on sale of business (Note 3)	0	(129)	0
Other (income) expense – net	(60)	(30)	28
Total costs and expenses	7,164	6,596	7,947
Operating income (loss)	3,339	4,311	3,018
Equity earnings (losses)	560	589	637
Other investing income (loss) – net	343	108	16
Interest Expense, Nonoperating	(1,364)	(1,236)	(1,147)
Gain (Loss) Related to Litigation Settlement	0	534	0
Other income (expense) – net	108	99	18
Income (loss) before income taxes	2,986	4,405	2,542
Less: Provision (benefit) for income taxes	640	1,005	425
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	2,346	3,400	2,117
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	(97)	0
Net income (loss)	2,346	3,303	2,117
Less: Net income (loss) attributable to noncontrolling interests	121	124	68
Net income (loss) attributable to The Williams Companies, Inc.	2,225	3,179	2,049
Less: Preferred stock dividends	3	3	3
Net income (loss) available to common stockholders	2,222	3,176	2,046
Amounts attributable to The Williams Companies, Inc. available to common stockholders:
Income (loss) from continuing operations	2,222	3,273	2,046
Income (loss) from discontinued operations (Note 1)	$ 0	$ (97)	$ 0
Basic earnings (loss) per common share:
Income (Loss) from Continuing Operations, Per Basic Share	$ 1.82	$ 2.69	$ 1.68
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	(0.08)	0
Net income (loss) available to common stockholders - Basic	$ 1.82	$ 2.61	$ 1.68
Weighted Average Number of Shares Outstanding, Basic	1,219,184	1,217,784	1,218,362
Diluted earnings (loss) per common share:
Income (Loss) from Continuing Operations, Per Diluted Share	$ 1.82	$ 2.68	$ 1.67
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	(0.08)	0
Net income (loss) available to common stockholders - Diluted	$ 1.82	$ 2.60	$ 1.67
Weighted Average Number of Shares Outstanding, Diluted	1,222,954	1,222,715	1,222,672
Service [Member]
Revenues:
Revenues	$ 7,628	$ 7,026	$ 6,536
NonRegulated Service Commodity Consideration [Member]
Revenues:
Revenues	134	146	260
Product [Member]
Revenues:
Revenues	2,991	2,779	4,556
Energy Commodities and Service
Revenues:
Revenues	(250)	956	(387)
Oil and Gas, Purchased [Member]
Costs and expenses:
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	2,075	1,884	3,369
Natural Gas Purchased For Shrink [Member]
Costs and expenses:
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	$ 43	$ 151	$ 88

Consolidated Balance Sheet - Williams - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 60	$ 2,150
Receivables, Net, Current	1,863	1,655
Inventories	279	274
Derivative assets	267	239
Other current assets and deferred charges	192	195
Total current assets	2,661	4,513
Investments	4,140	4,637
Property, Plant and Equipment, Net	38,692	34,311
Intangible assets – net of accumulated amortization	7,209	7,593
Regulatory assets, deferred charges, and other	1,830	1,573
Total assets	54,532	52,627
Current liabilities:
Accounts payable	1,613	1,379
Derivative Liability, Current	164	105
Other current liabilities	1,360	1,284
Commercial paper	455	725
Long-term debt due within one year	1,720	2,337
Total current liabilities	5,312	5,830
Long-term debt	24,736	23,376
Deferred income tax liabilities	4,376	3,846
Regulatory liabilities, deferred income, and other	5,268	4,684
Contingent liabilities and commitments (Note 18)
Stockholders’ equity:
Preferred stock ($1 par value; 30 million shares authorized at December 31, 2024 and December 31, 2023; 35 thousand shares issued at December 31, 2024 and December 31, 2023)	35	35
Common stock ($1 par value; 1,470 million shares authorized at December 31, 2024 and December 31, 2023; 1,258 million shares issued at December 31, 2024 and 1,256 million shares issued at December 31, 2023)	1,258	1,256
Capital in excess of par value	24,643	24,578
Retained deficit	(12,396)	(12,287)
Accumulated other comprehensive income (loss)	76	0
Treasury stock, at cost (39 million shares at December 31, 2024 and December 31, 2023 of common stock)	(1,180)	(1,180)
Total stockholders’ equity	12,436	12,402
Noncontrolling interests in consolidated subsidiaries	2,404	2,489
Total equity	14,840	14,891
Total liabilities and equity	$ 54,532	$ 52,627

Consolidated Balance Sheet (Parenthetical) - Williams - USD ($) shares in Thousands, $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss, Current	$ 1	$ 3
Common Stock, Par or Stated Value Per Share	$ 1	$ 1
Common Stock, Shares Authorized	1,470,000	1,470,000
Common Stock, Shares, Issued	1,258,000	1,256,000
Treasury Stock, Common, Shares	39,000	39,000
Series B Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share	$ 1	$ 1
Preferred Stock, Shares Authorized	30,000	30,000
Preferred Stock, Shares Issued	35	35

Consolidated Statement of Changes in Equity - Williams - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Capital in Excess of Par Value	Retained Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total Stockholders' Equity	Noncontrolling Interests
Beginning balance at Dec. 31, 2021	$ 14,101	$ 35	$ 1,250	$ 24,449	$ (13,237)	$ (33)	$ (1,041)	$ 11,423	$ 2,678
Net income (loss)	2,117	0	0	0	2,049	0	0	2,049	68
Other comprehensive income (loss)	9	0	0	0	0	9	0	9	0
Dividends, Common Stock, Cash	(2,071)	0	0	0	(2,071)	0	0	(2,071)	0
Stock-based compensation and related common stock issuances, net of tax	96	0	3	93	0	0	0	96	0
Dividends and distributions to noncontrolling interests	(204)	0	0	0	0	0	0	0	(204)
Contributions from noncontrolling interests	18	0	0	0	0	0	0	0	18
Purchases of treasury stock	(9)	0	0	0	0	0	(9)	(9)	0
Other	(12)	0	0	0	(12)	0	0	(12)	0
Net increase (decrease) in equity	(56)	0	3	93	(34)	9	(9)	62	(118)
Ending balance at Dec. 31, 2022	14,045	35	1,253	24,542	(13,271)	(24)	(1,050)	11,485	2,560
Net income (loss)	3,303	0	0	0	3,179	0	0	3,179	124
Other comprehensive income (loss)	25	0	0	0	0	25	0	25	0
Dividends, Common Stock, Cash	(2,179)	0	0	0	(2,179)	0	0	(2,179)	0
Stock-based compensation and related common stock issuances, net of tax	38	0	3	35	0	0	0	38	0
Dividends and distributions to noncontrolling interests	(213)	0	0	0	0	0	0	0	(213)
Contributions from noncontrolling interests	18	0	0	0	0	0	0	0	18
Purchases of treasury stock	(130)	0	0	0	0	0	(130)	(130)	0
Other	(16)	0	0	1	(16)	(1)	0	(16)	0
Net increase (decrease) in equity	846	0	3	36	984	24	(130)	917	(71)
Ending balance at Dec. 31, 2023	14,891	35	1,256	24,578	(12,287)	0	(1,180)	12,402	2,489
Net income (loss)	2,346	0	0	0	2,225	0	0	2,225	121
Other comprehensive income (loss)	76	0	0	0	0	76	0	76	0
Dividends, Common Stock, Cash	(2,316)	0	0	0	(2,316)	0	0	(2,316)	0
Stock-based compensation and related common stock issuances, net of tax	67	0	2	65	0	0	0	67	0
Dividends and distributions to noncontrolling interests	(242)	0	0	0	0	0	0	0	(242)
Contributions from noncontrolling interests	36	0	0	0	0	0	0	0	36
Purchases of treasury stock	0
Other	(18)	0	0	0	(18)	0	0	(18)	0
Net increase (decrease) in equity	(51)	0	2	65	(109)	76	0	34	(85)
Ending balance at Dec. 31, 2024	$ 14,840	$ 35	$ 1,258	$ 24,643	$ (12,396)	$ 76	$ (1,180)	$ 12,436	$ 2,404

Statement of Net Income - Transco - USD ($) $ in Millions	12 Months Ended
Statement of Net Income - Transco - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues [Abstract]
Revenues	$ 10,503	$ 10,907	$ 10,965
Costs and Expenses [Abstract]
Depreciation and amortization	2,219	2,071	2,009
Other Operating Income (Expense), Net	(60)	(30)	28
Total costs and expenses	7,164	6,596	7,947
Operating income (loss)	3,339	4,311	3,018
Interest Expense, Nonoperating	(1,364)	(1,236)	(1,147)
Other Nonoperating Income (Expense)	108	99	18
Net income	2,225	3,179	2,049
Transcontinental Gas Pipe Line Company, LLC [Member]
Revenues [Abstract]
Revenues	2,964	2,866	2,909
Costs and Expenses [Abstract]
Cost of natural gas sales	118	137	179
Utilities Operating Expense, Maintenance and Operations	510	517	531
General and Administrative Expense	216	215	225
Depreciation and amortization	545	519	513
Taxes, Miscellaneous	111	105	98
Other Operating Income (Expense), Net	(35)	(38)	(7)
Total costs and expenses	1,465	1,455	1,539
Operating income (loss)	1,499	1,411	1,370
Interest Expense, Nonoperating	(324)	(324)	(327)
Interest Income, Other	58	87	36
Public Utilities, Allowance for Funds Used During Construction, Additions	88	77	28
Other Nonoperating Income (Expense)	(8)	(4)	(7)
Net income	1,313	1,247	1,100
Natural Gas, US Regulated \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenues [Abstract]
Revenues	2,619	2,506	2,503
Natural Gas, Storage \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenues [Abstract]
Revenues	200	186	193
Natural Gas, Gathering, Transportation, Marketing and Processing \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenues [Abstract]
Revenues	118	137	179
Product and Service, Other \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenues [Abstract]
Revenues	$ 27	$ 37	$ 34

Balance Sheet - Transco - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets, Current [Abstract]
Cash and cash equivalents	$ 60	$ 2,150
Inventory, Net	279	274
Other current assets and deferred charges	192	195
Current assets	2,661	4,513
Property, Plant and Equipment, Net	38,692	34,311
Other Assets, Noncurrent	1,830	1,573
Total assets	54,532	52,627
Liabilities, Current [Abstract]
Accounts payable	1,613	1,379
Regulatory Liability, Current	85	77
Other current liabilities	1,360	1,284
Asset Retirement Obligation, Current	91	106
Total current liabilities	5,312	5,830
Contingent liabilities and commitments
Members' Equity [Abstract]
Retained Earnings (Accumulated Deficit)	(12,396)	(12,287)
Total liabilities and equity	54,532	52,627
Transcontinental Gas Pipe Line Company, LLC [Member]
Assets, Current [Abstract]
Cash and cash equivalents	0	0
Accounts and Other Receivables, Net, Current	12	11
Inventory, Net	81	83
Regulatory Assets, Current	74	87
Other current assets and deferred charges	24	14
Current assets	1,103	1,809
Property, Plant and Equipment, Net	14,103	13,330
Regulatory Assets, Noncurrent	320	299
Other Assets, Noncurrent	405	350
Total assets	15,931	15,788
Liabilities, Current [Abstract]
Accounts Payable, Trade, Current	258	278
Regulatory Liability, Current	58	49
Other current liabilities	181	190
Asset Retirement Obligation, Current	22	96
Long-Term Debt, Current Maturities	35	32
Total current liabilities	609	700
Long-Term Debt, Excluding Current Maturities	5,200	5,229
Regulatory Liabilities, Noncurrent	976	956
Asset Retirement Obligations, Noncurrent	593	524
Other Liabilities, Noncurrent	248	242
Contingent liabilities and commitments
Members' Equity [Abstract]
Members' Capital	5,088	5,088
Retained Earnings (Accumulated Deficit)	3,217	3,049
Total Members' Equity	8,305	8,137
Total liabilities and equity	15,931	15,788
Transcontinental Gas Pipe Line Company, LLC [Member] \| Related Party
Assets, Current [Abstract]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current	638	1,353
Accounts Receivable, after Allowance for Credit Loss, Current	24	10
Liabilities, Current [Abstract]
Accounts payable	55	55
Transcontinental Gas Pipe Line Company, LLC [Member] \| Nonrelated Party
Assets, Current [Abstract]
Accounts Receivable, after Allowance for Credit Loss, Current	$ 250	$ 251

Statement of Changes in Member's Equity - Transco - USD ($) $ in Millions	Total	Transcontinental Gas Pipe Line Company, LLC [Member]	Member's Capital Transcontinental Gas Pipe Line Company, LLC [Member]	Retained Earnings Transcontinental Gas Pipe Line Company, LLC [Member]
Balance at beginning of year at Dec. 31, 2021			$ 4,960	$ 2,760
Cash contributions from parent		$ (128)	128
Net income	$ 2,049	1,100		1,100
Cash distributions to parent		838		(838)
Balance at end of year at Dec. 31, 2022		8,110	5,088	3,022
Cash contributions from parent		0	0
Net income	3,179	1,247		1,247
Cash distributions to parent		1,220		(1,220)
Balance at end of year at Dec. 31, 2023		8,137	5,088	3,049
Cash contributions from parent		0	0
Net income	$ 2,225	1,313		1,313
Cash distributions to parent		1,145		(1,145)
Balance at end of year at Dec. 31, 2024		$ 8,305	$ 5,088	$ 3,217

Statement of Cash Flows - Transco - USD ($) $ in Millions	12 Months Ended
Statement of Cash Flows - Transco - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income	$ 2,346	$ 3,303	$ 2,117
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization	2,219	2,071	2,009
Increase (Decrease) in Operating Capital [Abstract]
Increase (Decrease) in Inventories	(9)	13	(110)
Increase (Decrease) in Other Current Assets	9	60	(33)
Other current liabilities	35	(19)	209
Other Operating Activities, Cash Flow Statement	(245)	(216)	(216)
Net cash provided (used) by operating activities	4,974	5,938	4,889
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net cash provided (used) by financing activities	(2,201)	(49)	(3,042)
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures (1)	(2,573)	(2,516)	(2,253)
Net cash provided (used) by investing activities	(4,863)	(3,891)	(3,375)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(2,090)	1,998	(1,528)
Cash and cash equivalents at beginning of year	2,150	152	1,680
Cash and cash equivalents at end of year	60	2,150	152
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Property, Plant and Equipment, Additions	(2,581)	(2,564)	(2,394)
Capital expenditures	(2,573)	(2,516)	(2,253)
Transcontinental Gas Pipe Line Company, LLC [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income	1,313	1,247	1,100
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization	545	519	513
Increase (Decrease) in Allowance for Equity Funds Used During Construction	(71)	(63)	(23)
Increase (Decrease) in Operating Capital [Abstract]
Increase (Decrease) in Accounts Receivable, Related Parties	(14)	(1)	(1)
Increase (Decrease) in Accounts and Other Receivables	0	6	(20)
Increase (Decrease) in Inventories	2	10	(39)
Increase (Decrease) in Other Regulatory Assets	13	37	(10)
Increase (Decrease) in Other Current Assets	(10)	27	(17)
Increase (Decrease) in Accounts Payable, Trade	(4)	(18)	21
Increase (Decrease) in Accounts Payable, Related Parties	0	1	(15)
Other current liabilities	(63)	72	(31)
Other Operating Activities, Cash Flow Statement	(15)	(122)	38
Net cash provided (used) by operating activities	1,696	1,715	1,516
Net Cash Provided by (Used in) Financing Activities [Abstract]
Proceeds from Issuance of Other Long-Term Debt	2	7	9
Repayments of Other Long-Term Debt	(32)	(29)	(26)
Cash distributions to parent	(1,145)	(1,220)	(838)
Cash contributions from parent	0	0	128
Net cash provided (used) by financing activities	(1,175)	(1,242)	(727)
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures (1)	(1,140)	(894)	(603)
Contributions in aid of construction	16	21	1
Payments for (Proceeds from) Removal Costs	(110)	(51)	(33)
IncreaseDecreaseInAdvancesToAffiliates	715	460	(143)
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(23)	(22)	(21)
Proceeds from Decommissioning Trust Fund Assets	21	13	10
Net cash provided (used) by investing activities	(521)	(473)	(789)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	0	0	0
Cash and cash equivalents at beginning of year	0	0	0
Cash and cash equivalents at end of year	0	0	0
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Property, Plant and Equipment, Additions	(1,112)	(991)	(587)
Increase (Decrease) in Accounts Payable And Accrued Liabilities Related To Capital Expenditures	(28)	97	(16)
Capital expenditures	$ (1,140)	$ (894)	$ (603)

Statement of Net Income - NWP - USD ($) $ in Millions	12 Months Ended
Statement of Net Income - NWP - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues [Abstract]
Revenues	$ 10,503	$ 10,907	$ 10,965
Costs and Expenses [Abstract]
Depreciation and amortization expenses	1,800	1,700	1,500
Other Operating Income (Expense), Net	(60)	(30)	28
Operating income (loss)	3,339	4,311	3,018
Interest Expense, Nonoperating	(1,364)	(1,236)	(1,147)
Other Nonoperating Income (Expense)	108	99	18
Net income (loss) attributable to The Williams Companies, Inc.	2,225	3,179	2,049
Northwest Pipeline LLC [Member]
Revenues [Abstract]
Revenues	444	440	448
Costs and Expenses [Abstract]
Utilities Operating Expense, Maintenance and Operations	95	88	84
General and Administrative Expense	51	51	52
Depreciation and amortization expenses	111	111	114
Taxes, Miscellaneous	14	12	17
Other Operating Income (Expense), Net	(18)	(16)	22
Operating Expenses	253	246	289
Operating income (loss)	191	194	159
Interest Expense, Nonoperating	(28)	(28)	(31)
Public Utilities, Allowance for Funds Used During Construction, Additions	10	4	3
Other Nonoperating Income (Expense)	7	10	6
Net income (loss) attributable to The Williams Companies, Inc.	180	180	137
Natural Gas, US Regulated \| Northwest Pipeline LLC [Member]
Revenues [Abstract]
Revenues	416	415	430
Natural Gas, Storage \| Northwest Pipeline LLC [Member]
Revenues [Abstract]
Revenues	15	15	13
Product and Service, Other \| Northwest Pipeline LLC [Member]
Revenues [Abstract]
Revenues	$ 13	$ 10	$ 5

Statement of Changes in Member's Equity - NWP - USD ($) $ in Millions	Total	Northwest Pipeline LLC [Member]	Member's Capital Northwest Pipeline LLC [Member]	Retained Earnings Northwest Pipeline LLC [Member]
Balance at beginning of year at Dec. 31, 2021			$ 1,074	$ 35
Net income	$ 2,049	$ 137		137
Cash distributions to parent		138		(138)
Balance at end of year at Dec. 31, 2022		1,108	1,074	34
Net income	3,179	180		180
Cash distributions to parent		155		(155)
Balance at end of year at Dec. 31, 2023		1,133	1,074	59
Net income	$ 2,225	180		180
Cash distributions to parent		150		(150)
Balance at end of year at Dec. 31, 2024		$ 1,163	$ 1,074	$ 89

Statement of Cash Flows - NWP - USD ($) $ in Millions	12 Months Ended
Statement of Cash Flows - NWP - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income	$ 2,346	$ 3,303	$ 2,117
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization	2,219	2,071	2,009
Increase (Decrease) in Operating Capital [Abstract]
Increase (Decrease) in Inventories	(9)	13	(110)
Increase (Decrease) in Other Current Assets	9	60	(33)
Other current liabilities	35	(19)	209
Other Operating Activities, Cash Flow Statement	(245)	(216)	(216)
Net cash provided (used) by operating activities	4,974	5,938	4,889
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net cash provided (used) by financing activities	(2,201)	(49)	(3,042)
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures (1)	(2,573)	(2,516)	(2,253)
Net cash provided (used) by investing activities	(4,863)	(3,891)	(3,375)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(2,090)	1,998	(1,528)
Cash and cash equivalents at beginning of year	2,150	152	1,680
Cash and cash equivalents at end of year	60	2,150	152
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Property, Plant and Equipment, Additions	(2,581)	(2,564)	(2,394)
Capital expenditures	(2,573)	(2,516)	(2,253)
Northwest Pipeline LLC [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income	180	180	137
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization	111	111	114
Increase (Decrease) in Allowance for Equity Funds Used During Construction	(8)	(3)	(2)
Increase (Decrease) in Operating Capital [Abstract]
Increase (Decrease) in Accounts Receivable, Related Parties	1	0	(1)
Increase (Decrease) in Accounts and Other Receivables	(1)	0	(1)
Increase (Decrease) in Inventories	(1)	1	0
Increase (Decrease) in Other Current Assets	(2)	1	0
Increase (Decrease) in Accounts Payable, Trade	(3)	4	(1)
Increase (Decrease) in Accounts Payable, Related Parties	(1)	1	(1)
IncreaseDecreaseInOtherRegulatoryLiabilities	1	(126)	145
Other current liabilities	(3)	3	1
Increase (Decrease) in Regulatory Assets Noncurrent	(15)	(29)	0
Increase (Decrease) in Regulatory Liabilities Noncurrent	(27)	(20)	(120)
Other Operating Activities, Cash Flow Statement	7	6	(3)
Net cash provided (used) by operating activities	239	129	268
Net Cash Provided by (Used in) Financing Activities [Abstract]
Cash distributions to parent	(150)	(155)	(138)
Increase Decrease In Advances From Affiliates	26	0	0
Net cash provided (used) by financing activities	(124)	(155)	(138)
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures (1)	(266)	(125)	(107)
Contributions in aid of construction	5	6	11
Payments for (Proceeds from) Removal Costs	(12)	(8)	(5)
IncreaseDecreaseInAdvancesToAffiliates	158	153	(29)
Net cash provided (used) by investing activities	(115)	26	(130)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	0	0	0
Cash and cash equivalents at beginning of year	0	0	0
Cash and cash equivalents at end of year	0	0	0
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Property, Plant and Equipment, Additions	(266)	(140)	(109)
Increase (Decrease) in Accounts Payable And Accrued Liabilities Related To Capital Expenditures	0	15	2
Capital expenditures	$ (266)	$ (125)	$ (107)

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2024
Related Party Transactions [Abstract]
Related Party Transactions [Text Block]	Note 4 – Related Party Transactions Williams Transactions with Equity-Method Investees Williams has costs and expenses associated with its equity-method investees of $266 million, $776 million, and $1.3 billion for 2024, 2023, and 2022, respectively in its Consolidated Statement of Income. Substantially all of these expenses are included in Product costs. Williams also has revenue from its equity-method investees of $2 million, $5 million, and $76 million for 2024, 2023, and 2022, respectively. In addition, Williams has $1 million and $2 million included in Trade accounts and other receivables and $19 million and $33 million included in Accounts payable in its Consolidated Balance Sheet with its equity-method investees at December 31, 2024 and 2023, respectively. Williams has operating agreements with certain equity-method investees. These operating agreements typically provide for reimbursement or payment to Williams for certain direct operational payroll and employee benefit costs, materials, supplies, and other charges and also for management services. The total charges to equity-method investees for these fees are $52 million, $64 million, and $65 million for 2024, 2023, and 2022, respectively. Board of Directors Two members of Williams’ Board of Directors are also executive officers at certain of its counterparties. Williams recorded $59 million, $90 million, and $180 million in Product sales and $40 million, $25 million, and $86 million in Product costs in its Consolidated Statement of Income from these companies for the purchase and sale of natural gas for 2024, 2023, and 2022, respectively. Transco and NWP Affiliate Transactions Benefit Plans Transco and NWP do not have employees. Certain of the costs charged to them by Williams associated with employees who directly support them are described below. Additionally, allocated corporate expenses from Williams also include amounts related to these same employee benefits, which are not included in the amounts presented immediately below. Pension and Other Postretirement Benefit Plans Williams’ pension and other postretirement benefit plans are single-employer plans. However, Transco and NWP follow multiemployer plan accounting whereby the amount charged to them and thus paid by them, is based on their share of net periodic benefit cost (see Note 7 – Employee Benefit Plans). Pension costs charged to Transco by Williams were $1 million, $2 million, and $4 million for 2024, 2023, and 2022, respectively. NWP received pension credits from Williams of $1 million in 2024, $0 million in 2023, and pension charges of $1 million in 2022. Williams makes annual cash contributions to the pension plans, based on annual actuarial estimates, which Transco recovers through rates that are set through periodic general rate filings. Effective with Transco’s Docket No. RP18-1126 rate case settlement, any amounts of annual contributions that fall below a threshold are recorded as adjustments to income and refunded through future rate adjustments. The amounts of deferred pension collections recorded as regulatory liabilities at December 31, 2024 and 2023 were $30 million and $26 million, respectively. Also effective with Transco’s Docket No. RP18-1126 rate case settlement, the pension regulatory liability as of March 1, 2019 was amortized over a five-year period, and the amortization was completed in February 2024. Transco recognized other postretirement benefit income of $8 million, $6 million, and $5 million for 2024, 2023, and 2022, respectively, while NWP recognized other postretirement benefit income of $1 million, $0 million, and $1 million, respectively for the same periods. These credits were recorded as regulatory liabilities. Transco and NWP have been allowed by rate case settlements to collect or refund in future rates any differences between the actuarially determined costs and amounts currently being recovered in rates related to other postretirement benefits. Any differences between the annual actuarially determined cost and amounts currently being recovered in rates are recorded as regulatory assets or liabilities and collected or refunded through future rate adjustments. The amounts of other postretirement benefits costs deferred as regulatory liabilities at December 31, 2024 and 2023 are $31 million and $31 million, for Transco respectively, and $43 million and $42 million, for NWP respectively. Effective with the Docket No. RP18-1126 rate case settlement, Transco’s other postretirement benefits regulatory liability as of March 1, 2019 was amortized over a period of approximately five years, and the amortization was completed in July 2024. Defined Contribution Plan Williams maintains a defined contribution plan for substantially all of its employees. Williams charged Transco compensation expense of $13 million, $12 million, and $11 million in 2024, 2023, and 2022, respectively, and charged NWP compensation expense of $3 million, $3 million, and $3 million in 2024, 2023, and 2022, respectively, for Williams’ company contributions to this plan. Employee Stock-Based Compensation Plan Information (see Note 15 – Equity-Based Compensation) Williams currently bills Transco and NWP directly for compensation expense related to stock-based compensation awards based on the fair value of the awards. Transco and NWP are also billed for their proportionate share of Williams’ and other affiliates’ stock-based compensation expense through various allocation processes. Total stock-based compensation expense for the years ended December 31, 2024, 2023, and 2022 was $6 million, $6 million, and $6 million, for Transco respectively, and $2 million, $2 million, and $1 million, for NWP respectively. Cash Management Program Transco and NWP are participants in Williams’ cash management program, and thus make advances to and receive advances from Williams. At December 31, 2024 and 2023, Transco’s advances to Williams totaled approximately $638 million and $1.4 billion, respectively. These advances are represented by demand notes and are classified as Trade accounts and other receivables - Advances to affiliate in the Balance Sheet. NWP’s advances from Williams totaled approximately $26 million at December 31, 2024. These advances from Williams are classified as Payables - Advances from affiliate. Advances to Williams from NWP totaled approximately $158 million at December 31, 2023. These advances are represented by demand notes and are classified as Trade accounts and other receivables - Advances to affiliate in the Balance Sheet. Advances are stated at the historical carrying amounts. Interest expense and income are recognized when earned and the collectability is reasonably assured. The interest rate on these intercompany demand notes is based upon the daily overnight investment rate paid on Williams’ excess cash at the end of each month, which was approximately 4 percent at December 31, 2024. The net interest income from these advances was $51 million, $81 million, and $31 million during years ended December 31, 2024, 2023, and 2022, for Transco respectively, and $5 million, $8 million, and $5 million for the years ended December 31, 2024, 2023, and 2022 for NWP respectively. Such interest income is included in Interest income in the Statement of Net Income for Transco and Other income (expense) – net in the Statement of Net Income for NWP. Other Affiliate Transactions Included in Transco’s Total revenues in the Statement of Net Income for 2024, 2023, and 2022 are revenues received from affiliates of $76 million, $56 million, and $89 million, respectively. Included in Transco’s Natural gas product costs in the Statement of Net Income for 2024, 2023, and 2022 are costs of gas purchased from affiliates of $5 million, $7 million, and $18 million, respectively. All gas purchases are made at market or contract prices. Services necessary to operate Transco and NWP are provided by Williams and certain affiliates of Williams. Transco and NWP reimburse Williams and its affiliates for all direct and indirect expenses incurred or payments made (including salary, bonus, incentive compensation, and benefits) in connection with these services. Employees of Williams also provide general, administrative, and management services, and Transco and NWP are charged for certain administrative expenses incurred by Williams. These charges are either directly assigned or allocated. Allocated charges are specific or general. Specific allocations are based on a relationship with the delivery of services and general allocations are based on a three-factor formula, which considers revenues; property, plant, and equipment; and payroll. In management’s estimation, the allocation methodologies used are reasonable and result in a reasonable allocation of costs of doing business incurred by Williams. For the years ended December 31, 2024, 2023, and 2022, Transco has recorded $344 million, $324 million, and $345 million, respectively, and NWP has recorded $91 million, $86 million, and $88 million, respectively, for these service expenses, which are primarily included in Operating and maintenance expenses and Selling, general, and administrative expenses in the Statement of Net Income. Transco provides services to certain of its affiliates. Transco recorded reductions in operating expenses for services provided to and reimbursed by affiliates of $6 million, $14 million, and $10 million for the years ended December 31, 2024, 2023, and 2022, respectively. During January 2025, Transco and NWP declared and paid cash distributions of $246 million and $24 million, respectively, to Williams, and Williams made a cash contribution to NWP of $85 million.

Equity-Based Compensation	12 Months Ended
Equity-Based Compensation	Dec. 31, 2024
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Equity-Based Compensation [Text Block]	Note 15 – Equity-Based Compensation Williams’ Plan Information The Williams Companies, Inc. 2007 Incentive Plan (the Plan) provides common-stock-based awards to both employees and nonmanagement directors. To date, 50 million new shares have been authorized for making awards under the Plan. The Plan permits the granting of various types of awards including, but not limited to, restricted stock units and stock options. At December 31, 2024, 17 million shares of common stock were reserved for issuance pursuant to existing and future stock awards, of which 9 million shares were available for future grants. Additionally, up to 5.2 million new shares of Williams’ common stock have been authorized to date to be available for sale under Williams’ Employee Stock Purchase Plan (ESPP). Employees purchased 240 thousand shares at a weighted-average price of $33.00 per share during 2024. Approximately 0.7 million shares were available for purchase under the ESPP at December 31, 2024. Williams recognizes compensation expense on employee stock-based awards on a straight-line basis; forfeitures are recognized when they occur. Operating and maintenance expenses and Selling, general, and administrative expenses in Williams’ Consolidated Statement of Income include equity-based compensation expense in 2024, 2023, and 2022 of $99 million, $77 million, and $73 million, respectively. Income tax benefit recognized related to the stock-based compensation expense in 2024, 2023, and 2022 was $24 million, $19 million, and $18 million, respectively. Measured but unrecognized stock-based compensation expense at December 31, 2024, was $70 million, all of which related to restricted stock units. These amounts are expected to be recognized over a weighted-average period of 1.7 years. Nonvested Restricted Stock Units At December 31, 2024 and 2023, Williams had restricted stock units outstanding, including performance-based shares, of 6.4 million shares and 6.6 million shares, respectively, with a weighted-average fair value of $32.48 and $28.34, respectively. During 2024 and 2023, Williams granted 3.1 million and 3.8 million shares of restricted stock units with a weighted-average fair value of $31.77 and $27.43, respectively. Restricted stock units generally vest after three years. Performance-based grants may vest at a range from zero percent to 200 percent of the original shares granted based on performance against a target. At December 31, 2024, there were 1.8 million performance-based shares outstanding. Stock Options There were no stock options granted in 2024, 2023, or 2022. At December 31, 2024, Williams had 0.4 million stock options that were both outstanding and exercisable, with a weighted-average exercise price of $29.99. The weighted-average remaining contractual life for stock options that were both outstanding and exercisable at December 31, 2024, was 2.4 years. Cash received for the exercise of stock options in 2024 and 2023 was $5 million and $2 million, respectively, and the related income tax benefit recognized in both 2024 and 2023 was $2 million.

Contingencies and Commitments	12 Months Ended
Contingencies and Commitments	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Contingencies and Commitments [Text Block]	Note 18 – Contingencies and Commitments Royalty Matters Certain customers, including Expand Energy Corporation (formerly Chesapeake Energy Corporation or Chesapeake), have been named in various lawsuits alleging underpayment of royalties and claiming, among other things, violations of anti-trust laws and the Racketeer Influenced and Corrupt Organizations Act. Williams has also been named as a defendant in certain of these cases filed in Pennsylvania based on allegations that Williams improperly participated with Chesapeake in causing the alleged royalty underpayments. Williams believes that the claims asserted are subject to indemnity obligations owed to Williams by Chesapeake, which obligations survived Chesapeake’s bankruptcy proceedings. Prior to its bankruptcy, Chesapeake reached a settlement to resolve substantially all Pennsylvania royalty cases pending. During the pendency of the bankruptcy, that settlement was renegotiated. The settlement applies to both Chesapeake and Williams and does not require any contribution from Williams. On August 23, 2021, after referral to the United States District Court for the Southern District of Texas by the bankruptcy court, the court approved the settlement. Two objectors filed an appeal with the United States Court of Appeals for the Fifth Circuit. On June 8, 2023, the Court of Appeals vacated the settlement approval and remanded to the United States District Court for the Southern District of Texas with instructions to dismiss the settlement proceedings for lack of jurisdiction. On August 31, 2023, the bankruptcy court entered an order finding the settlement agreements to be null and void. Certain plaintiffs have filed a notice of dismissal of their claims against Chesapeake that arose prior to February 8, 2021, in the United States District Court for the Middle District of Pennsylvania lawsuits. The notice states that plaintiffs are not releasing their claims against the other defendants, including Williams, or claims against Chesapeake that arose after February 9, 2021. Williams continues to believe the claims against Williams are subject to indemnity obligations owed to Williams by Chesapeake. Rate Matters On August 30, 2024, Transco filed a general rate case (Docket No. RP24-1035) with the FERC for an overall increase in rates and to comply with the terms of the settlement of its prior rate case to file a rate case no later than August 30, 2024. On September 30, 2024, the FERC issued an order accepting and suspending Transco’s general rate filing to be effective March 1, 2025, subject to refund and the outcome of hearing procedures established by the FERC except that rates for certain services that were proposed as overall rate decreases were accepted, without suspension, to be effective October 1, 2024. The decreased rates will not be subject to refund but may be subject to decrease prospectively under Section 5 of the Natural Gas Act of 1938 as amended. Construction Litigation In February 2025, Transco received an adverse judgment related to litigation in the United States Bankruptcy Court for the District of Delaware involving the contractor for the construction of Transco’s Atlantic Sunrise project completed in 2018. The total award to the contractor, estimated at $110 million, included amounts for unpaid invoices, interest, and attorney fees. Management estimates the probable loss from the judgment to be substantially less and Transco has filed a notice of appeal. Transco has capitalized the amount considered probable within noncurrent assets and expects any additional probable loss would also be capitalized. Transco also expects to recover approximately 29 percent of any amount paid from the counterparty on the project. Environmental Matters Williams Williams is a participant in certain environmental activities in various stages including assessment studies, cleanup operations, and/or remedial processes at certain sites, some of which Williams currently does not own. Williams is monitoring these sites in a coordinated effort with other potentially responsible parties, the U.S. Environmental Protection Agency (EPA), or other governmental authorities. Williams is jointly and severally liable along with unrelated third parties in some of these activities and solely responsible in others. Certain of Williams’ subsidiaries have been identified as potentially responsible parties at various Superfund and state waste disposal sites. In addition, these subsidiaries have incurred, or are alleged to have incurred, various other hazardous materials removal or remediation obligations under environmental laws. As of December 31, 2024, Williams has accrued liabilities totaling $42 million for these matters, as discussed below. Estimates of the most likely costs of cleanup are generally based on completed assessment studies, preliminary results of studies, or Williams’ experience with other similar cleanup operations. At December 31, 2024, certain assessment studies were still in process for which the ultimate outcome may yield different estimates of most likely costs. Therefore, the actual costs incurred will depend on the final amount, type, and extent of contamination discovered at these sites, the final cleanup standards mandated by the EPA or other governmental authorities, and other factors. The EPA, other federal agencies, and various state regulatory agencies routinely propose and promulgate new rules, issue updated guidance to rules, or revise existing rules. These rulemakings include, but are not limited to, reviews and updates to the National Ambient Air Quality Standards, and promulgation of rules for new and existing source performance standards for certain equipment emitting volatile organic compound and methane as well as limitations on emissions of greenhouse gas compounds. Williams continuously monitors these regulatory changes and how they may impact its operations. Implementation of new or revised regulations may result in impacts to Williams’ operations and increase the cost of additions to Property, plant, and equipment – net in the balance sheet for both new and existing facilities in affected areas; however, due to regulatory uncertainty on final rule content or guidance and applicability timeframes, Williams is unable to reasonably estimate the cost of these regulatory impacts at this time. Continuing operations Williams’ interstate gas pipelines are involved in remediation and monitoring activities related to certain facilities and locations for polychlorinated biphenyls, mercury, and other hazardous substances. These activities have involved the EPA and various state environmental authorities, resulting in Williams’ identification as a potentially responsible party at various Superfund waste sites. At December 31, 2024, Williams has accrued liabilities of $12 million (see Transco and NWP below) for these costs and expect to recover approximately $4 million through rates. Williams also accrues environmental remediation costs for natural gas underground storage facilities, primarily related to soil and groundwater contamination. At December 31, 2024, Williams has accrued liabilities totaling $7 million for these costs. Former operations Williams has potential obligations in connection with assets and businesses it no longer operates. These potential obligations include remediation activities at the direction of federal and state environmental authorities and the indemnification of the purchasers of certain of these assets and businesses for environmental and other liabilities existing at the time the sale was consummated. At December 31, 2024, Williams has accrued environmental liabilities of $23 million related to these matters. Transco Transco has had studies underway for many years to test some of its facilities for the presence of toxic and hazardous substances such as polychlorinated biphenyls (PCBs) and mercury to determine to what extent, if any, remediation may be necessary. Transco has also similarly evaluated past on-site disposal of hydrocarbons at a number of its facilities. Transco has worked closely with and responded to data requests from the EPA and state agencies regarding such potential contamination of certain of their sites. Transco is conducting environmental assessments and implementing a variety of remedial measures that may result in increases or decreases in the total estimated costs. Transco also has a program for monitoring certain environmental activities at their Eminence storage facility. At December 31, 2024, Transco has accrued liabilities of approximately $11 million for the expected ongoing remediation and monitoring costs. Transco has been identified as a potentially responsible party (PRP) at various Superfund and state waste disposal sites. Based on present volumetric estimates and other factors, their estimated aggregate exposure for remediation of these sites is less than $1 million. The estimated remediation costs for all of these sites are included in the environmental liabilities discussed above. Liability under the Comprehensive Environmental Response, Compensation and Liability Act and applicable state law can be joint and several with other PRPs. Although volumetric allocation is a factor in assessing liability, it is not necessarily determinative; thus, the ultimate liability could be substantially greater than the amounts described above. Transco considers prudently incurred environmental assessment and remediation costs and the costs associated with compliance with environmental standards to be recoverable through rates. Historically, with limited exceptions, it has been permitted recovery of environmental costs, and it is Transco’s intent to continue seeking recovery of such costs through future rate filings. NWP Beginning in the mid-1980s, NWP evaluated many of its facilities for the presence of toxic and hazardous substances to determine to what extent, if any, remediation might be necessary. NWP identified PCB contamination in air compressor systems, soils, and related properties at certain compressor station sites. Similarly, it identified hydrocarbon impacts at these facilities due to the former use of earthen pits, lubricating oil leaks or spills, and excess pipe coating released to the environment. In addition, heavy metals have been identified at these sites due to the former use of mercury containing meters and paint and welding rods containing lead, cadmium, and arsenic. The PCBs were remediated pursuant to a Consent Decree with the EPA in the late 1980s, and NWP conducted a voluntary clean-up of the hydrocarbon and mercury impacts in the early 1990s. In 2005, the Washington Department of Ecology required NWP to re-evaluate previous clean-ups in Washington. During 2006 to 2015, 129 meter stations were evaluated, of which 82 required remediation. As of December 31, 2024, two meter stations are still being remediated. During 2006 to 2018, 14 compressor stations were evaluated, of which 11 required remediation. As of December 31, 2024, four compressor stations are still being remediated. NWP had accrued liabilities totaling approximately $1 million at December 31, 2024 for the ongoing remediation. NWP is conducting environmental assessments and implementing a variety of remedial measures that may result in increases or decreases in the total estimated costs. Environmental expenditures are expensed or capitalized depending on their future economic benefit and potential for rate recovery. NWP believes that, with respect to any expenditures required to meet applicable standards and regulations, the FERC would grant the requisite rate relief so that substantially all of such expenditures would be permitted to be recovered through rates. Washington State Climate Commitment Act In 2021, the state of Washington passed its Climate Commitment Act establishing a market-based cap-and-invest program to reduce carbon emissions. This program took effect on January 1, 2023, and sets a limit, or cap, on overall carbon emissions in the state and requires businesses like NWP to obtain allowances equal to their annual covered carbon emissions. The state’s cap will be reduced over time to meet the state’s carbon emissions reduction targets, which means fewer carbon emissions allowances will be available to purchase each year. These allowances can be purchased through quarterly auctions hosted by the state or bought and sold on a secondary market. In 2023, NWP began purchasing allowances for the carbon emissions from nine of its thirteen compressor stations within the state whose annual carbon emissions have exceeded 25,000 metric tons of carbon dioxide equivalent at least once since 2015. NWP also began purchasing allowances for NWP’s delivery of natural gas to certain of their customers and certain of their facilities in the state whose annual carbon emissions are insufficient to require their direct participation in the program. NWP’s latest rate case settlement allows them to recover the costs of purchasing allowances under the program in their next rate case. At December 31, 2024 and December 31, 2023, a total of $38 million and $22 million, respectively, were included in Regulatory assets in NWP’s Balance Sheet and was comprised of the cost of the purchased allowances held, the estimated difference between the allowances held and the allowances required, and the interest income component of the regulatory asset. At December 31, 2024 and December 31, 2023, $3 million and $4 million, respectively, were recorded in Other current liabilities on NWP’s Balance Sheet as the estimated difference. Interest income of $2 million for the year ended December 31, 2024 and $1 million for the year ended December 31, 2023 is reflected in Other income (expense) – net in NWP’s Statement of Net Income. Other Divestiture Indemnifications Pursuant to various purchase and sale agreements relating to divested businesses and assets, Williams has indemnified certain purchasers against liabilities that they may incur with respect to the businesses and assets acquired. The indemnities provided to the purchasers are customary in sale transactions and are contingent upon the purchasers incurring liabilities that are not otherwise recoverable from third parties. At December 31, 2024, other than as previously disclosed, Williams is not aware of any material claims against it involving the above-described indemnities. Any claim for indemnity brought against Williams in the future may have a material adverse effect on Williams’ results of operations in the period in which the claim is made. In addition to the foregoing, various other proceedings are pending against Williams that are incidental to its operations, none of which are expected to be material to Williams’ expected future annual results of operations, liquidity, and financial position. Summary Williams, Transco and NWP have disclosed estimated ranges of reasonably possible losses for certain matters above, as well as all significant matters for which they are unable to reasonably estimate a range of possible loss. Williams, Transco and NWP estimate that for all other matters for which they are able to reasonably estimate a range of loss, the aggregate reasonably possible losses beyond amounts accrued are immaterial to expected future annual results of operations, liquidity, and financial position. These calculations have been made without consideration of any potential recovery from third parties. Commitments Commitments for Gas & NGL Marketing Services pipeline transportation capacity and storage capacity are approximately $954 million at December 31, 2024. Commitments for construction and acquisition of property, plant, and equipment for Williams, Transco, and NWP are approximately $155 million, $2 million, and less than $1 million, respectively at December 31, 2024.

Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2024
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Note 20 – Subsequent Events Quarterly Dividends to Common Stockholders On January 28, 2025, Williams’ board of directors approved a regular quarterly dividend to common stockholders of $0.500 per share payable on March 31, 2025. Long-term Debt Issuance and Retirement In January 2025, Williams issued $1 billion of 5.6 percent senior unsecured notes due March 15, 2035 and $500 million of 6.0 percent senior unsecured notes due March 15, 2055 (see Note 13 – Debt and Banking Arrangements). Also in January 2025, Williams retired $750 million of senior unsecured debt.

Pay vs Performance Disclosure - USD ($) $ in Millions	12 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net income	$ 2,225	$ 3,179	$ 2,049

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Dec. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Insider Trading Policies and Procedures	12 Months Ended
Insider Trading Policies and Procedures	Dec. 31, 2024
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Divestitures (Details) - USD ($) $ in Millions		12 Months Ended
Divestitures (Details) - USD ($) $ in Millions	Sep. 29, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Gain (Loss) on Disposition of Business		$ 0	$ 129	$ 0
Transmission And Gulf Of America [Member] \| Certain Gulf Coast Liquids Pipelines
Business Acquisition [Line Items]
Disposal Group, Consideration	$ 348
Gain (Loss) on Disposition of Business	$ 129

Related Party Transactions - Transco and NWP (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Mar. 01, 2019
Related Party Transaction [Line Items]
Regulatory Liabilities		$ 1,385	$ 1,365
Employer's contributions charged to expense under defined contribution plan		69	60	$ 53
Accounts payable		$ 1,613	1,379
Related Party Transaction, Rate		4.00%
Revenues		$ 10,503	10,907	10,965
Transcontinental Gas Pipe Line Company, LLC [Member]
Related Party Transaction [Line Items]
Regulatory Liabilities		1,034	1,005
Employer's contributions charged to expense under defined contribution plan		13	12	11
Equity-based compensation expense		6	6	6
Interest Income, Other		58	87	36
Revenues		2,964	2,866	2,909
Credit To Expenses From Affiliates		6	14	10
Cash distributions to parent		1,145	1,220	838
Transcontinental Gas Pipe Line Company, LLC [Member] \| Affiliated Entity
Related Party Transaction [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current		638	1,400
Interest Income, Other		51	81	31
Revenues		76	56	89
Related Party Transaction, Purchases from Related Party		5	7	18
Operating Expenses		344	324	345
Transcontinental Gas Pipe Line Company, LLC [Member] \| Affiliated Entity \| Subsequent Event [Member]
Related Party Transaction [Line Items]
Cash distributions to parent	$ 246
Transcontinental Gas Pipe Line Company, LLC [Member] \| Pension Benefits [Member]
Related Party Transaction [Line Items]
Pension Cost (Reversal of Cost)		1	2	4
Regulatory Liability, Deferred For Future Rate Treatment		30	26
Regulatory Liability, Amortization Period					5 years
Transcontinental Gas Pipe Line Company, LLC [Member] \| Other Postretirement Benefits [Member]
Related Party Transaction [Line Items]
Regulatory Liability, Amortization Period					5 years
Other Postretirement Benefits Cost (Reversal of Cost)		8	6	5
Regulatory Liabilities		31	31
Northwest Pipeline LLC [Member]
Related Party Transaction [Line Items]
Regulatory Liabilities		253	273
Employer's contributions charged to expense under defined contribution plan		3	3	3
Equity-based compensation expense		2	2	1
Interest Income, Other		2	1
Revenues		444	440	448
Operating Expenses		253	246	289
Cash distributions to parent		150	155	138
Northwest Pipeline LLC [Member] \| Affiliated Entity
Related Party Transaction [Line Items]
Accounts and Financing Receivable, after Allowance for Credit Loss, Current			158
Accounts payable		26	0
Interest Income, Other		5	8	5
Operating Expenses		91	86	88
Northwest Pipeline LLC [Member] \| Affiliated Entity \| Subsequent Event [Member]
Related Party Transaction [Line Items]
Cash distributions to parent	24
Northwest Pipeline LLC [Member] \| Pension Benefits [Member]
Related Party Transaction [Line Items]
Pension Cost (Reversal of Cost)		1	0	1
Northwest Pipeline LLC [Member] \| Other Postretirement Benefits [Member]
Related Party Transaction [Line Items]
Other Postretirement Benefits Cost (Reversal of Cost)		1	0	$ 1
Regulatory Liabilities		$ 43	$ 42
Williams Companies Inc [Member] \| Affiliated Entity \| Subsequent Event [Member]
Related Party Transaction [Line Items]
Cash distributions to parent	$ 85

Revenue Recognition Contract Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Contract With Customer, Asset [Line Items]
Contract with Customer, Asset, Net - Beginning of Period	$ 36	$ 29
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress	170	183
Contract with Customer, Asset, Reclassified to Receivable	(144)	(176)
Contract with Customer, Asset, Increase (Decrease) for Contract Acquired in Business Combination	36	0
Contract with Customer, Asset, Net - End of Period	98	36
Transcontinental Gas Pipe Line Company, LLC [Member]
Contract With Customer, Asset [Line Items]
Contract with Customer, Asset, Net - Beginning of Period	0	0
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress	10	0
Contract with Customer, Asset, Net - End of Period	10	0
Northwest Pipeline LLC [Member]
Contract With Customer, Asset [Line Items]
Contract with Customer, Asset, Net - Beginning of Period	17	13
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress	6	6
Contract with Customer, Asset, Reclassified to Receivable	(2)	(2)
Contract with Customer, Asset, Net - End of Period	$ 21	$ 17

Revenue Recognition Contract Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Contract With Customer, Liability [Line Items]
Contract with Customer, Liability - Beginning of Period	$ 1,081	$ 1,043
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress	183	190
Other Significant Noncash Transaction, Value of Consideration Received	8	9
Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination	53	115
Contract with Customer, Liability, Revenue Recognized	(279)	(276)
Contract with Customer, Liability - End of Period	1,046	1,081
Transcontinental Gas Pipe Line Company, LLC [Member]
Contract With Customer, Liability [Line Items]
Contract with Customer, Liability - Beginning of Period	184	194
Contract with Customer, Liability, Revenue Recognized	(11)	(10)
Contract with Customer, Liability - End of Period	173	184
Northwest Pipeline LLC [Member]
Contract With Customer, Liability [Line Items]
Contract with Customer, Liability - Beginning of Period	2	3
Contract with Customer, Liability, Revenue Recognized	(2)	(1)
Contract with Customer, Liability - End of Period	$ 0	$ 2

Revenue Recognition Contract Liabilities Performance Obligations (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	$ 1,046	$ 1,081	$ 1,043
Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	173	184	194
Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	0	$ 2	$ 3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	173
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	10
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	146
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	10
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	141
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	11
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	118
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	11
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	100
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	11
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	368
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	120
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	$ 0
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Performance Obligations Related To Contract Liabilities [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period

Revenue Recognition Remaining Performance Obligations (Details) $ in Millions	Dec. 31, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 31,059
Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	21,598
Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	4,101
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	4,132
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,726
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	391
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	3,860
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,536
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	386
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	3,623
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,438
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	373
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,778
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	1,784
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	368
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,564
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	1,693
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	349
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	14,102
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	10,421
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2,234
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01 \| Transcontinental Gas Pipe Line Company, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Remaining Performance Obligations [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-01-01 \| Northwest Pipeline LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period

Provision (Benefit) for Income Taxes Deferred Tax Table (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Gross deferred income tax liabilities:
Property, plant and equipment	$ 4,501	$ 3,541
Investments	1,733	1,740
Other	193	146
Total gross deferred income tax liabilities	6,427	5,427
Gross deferred income tax assets:
Accrued liabilities	1,146	868
Corporate alternative minimum tax credits	108	0
Foreign tax credits	0	35
Federal loss carryovers	325	398
Disallowed business interest expense carryforward	247	67
State losses and credits	224	293
Other	92	103
Total gross deferred income tax assets	2,142	1,764
Less valuation allowance	91	183
Net deferred income tax assets	2,051	1,581
Deferred income tax liabilities	$ 4,376	$ 3,846

EBP Asset rollforward and B.S. classification (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Amounts included in regulatory liabilities associated with Transco and Northwest Pipeline:
Net regulatory liabilities	$ 139	$ 123
Pension Benefits [Member]
Change in plan assets:
Fair value of plan assets at beginning of year	1,167	1,117
Actual return on plan assets	88	120
Employer contributions	4	1
Plan participants’ contributions	0	0
Benefits paid	(73)	(71)
Settlements	(3)	0
Net increase (decrease) in fair value of plan assets	16	50
Fair value of plan assets at end of year	1,183	1,167
Funded status — overfunded (underfunded)	246	161
Amounts recognized in the Consolidated Balance Sheet:
Noncurrent assets	270	187
Current liabilities	(4)	(4)
Noncurrent liabilities	(20)	(22)
Funded status - overfunded (underfunded)	246	161
Accumulated benefit obligation	929	998
Plans with a projected benefit obligation in excess of plan assets:
Projected benefit obligation	23	26
Plans with an accumulated benefit obligation in excess of plan assets:
Accumulated benefit obligation	22	24
Fair value of plan assets	0	0
Amounts recognized in Accumulated other comprehensive income (loss):
Net actuarial gain (loss)	49	(45)
Other Postretirement Benefits [Member]
Change in plan assets:
Fair value of plan assets at beginning of year	262	253
Actual return on plan assets	16	17
Employer contributions	3	3
Plan participants’ contributions	2	2
Benefits paid	(11)	(13)
Settlements	0	0
Net increase (decrease) in fair value of plan assets	10	9
Fair value of plan assets at end of year	272	262
Funded status — overfunded (underfunded)	140	117
Amounts recognized in the Consolidated Balance Sheet:
Noncurrent assets	143	120
Current liabilities	(3)	(3)
Noncurrent liabilities	0	0
Funded status - overfunded (underfunded)	140	117
Amounts recognized in Accumulated other comprehensive income (loss):
Net actuarial gain (loss)	$ 20	$ 19

EBP Key Assumptions (Details 3)	12 Months Ended
EBP Key Assumptions (Details 3)	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Benefits [Member]
Weighted average assumptions utilized to determine benefit obligations
Discount rate	5.60%	4.98%	5.16%
Rate of compensation increase	3.48%	3.52%	3.58%
Cash balance interest crediting rate	4.00%	4.50%	3.50%
Weighted average assumptions utilized to determine net periodic benefit cost (credit)
Discount rate	4.98%	5.16%	2.84%
Expected long-term rate of return on plan assets	5.31%	5.17%	3.81%
Rate of compensation increase	3.52%	3.58%	3.67%
Cash balance interest crediting rate	4.50%	3.50%	3.00%
Other Postretirement Benefits [Member]
Weighted average assumptions utilized to determine benefit obligations
Discount rate	5.67%	5.01%	5.20%
Weighted average assumptions utilized to determine net periodic benefit cost (credit)
Discount rate	5.01%	5.20%	2.93%
Expected long-term rate of return on plan assets	4.16%	4.04%	3.67%
Health care cost trend rate assumed for next fiscal year	9.20%
Direction and pattern of change for assumed health care cost trend rate	decreases
Ultimate health care cost trend rate	4.50%
Year that rate reaches ultimate trend rate	2034

EBP Benefit Pymts & Employer Contributions (Details 5) $ in Millions	Dec. 31, 2024 USD ($)
Pension Benefits [Member]
Expected benefit payments
2025	$ 101
2026	95
2027	91
2028	87
2029	83
2030-2034	389
Expected total plans contribution, approximate	1
Other Postretirement Benefits [Member]
Expected benefit payments
2025	11
2026	11
2027	11
2028	11
2029	10
2030-2034	48
Expected total plans contribution, approximate	$ 3