Summit Midstream Partners, LP Form 10-Q Quarterly Report Filed 2024-08-09

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)


x			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2024


o			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number: 001-35666

Summit Midstream Partners, LP

(Exact name of registrant as specified in its charter)

Delaware

(State or other jurisdiction of

incorporation or organization)

910 Louisiana Street, Suite 4200

Houston, TX

(Address of principal executive offices)

45-5200503

(I.R.S. Employer

Identification No.)

77002

(Zip Code)

(832) 413-4770

(Registrant’s telephone number, including area code)

Not applicable

(Former name, former address and former fiscal year, if changed since last report)

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


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Units	SMLP	New York Stock Exchange	*

* The registrant’s Common Units are currently registered pursuant to Section 12(b) of the Act. On August 1, 2024, the New York Stock Exchange filed a Form 25-NSE with the United States Securities and Exchange Commission, which will delist the Common Units from the New York Stock Exchange on August 11, 2024.

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. x Yes o No

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).


x			Yes			o			No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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.


Large accelerated filer	☐	Accelerated filer	x
Non-accelerated filer	☐	Smaller reporting company	x
Emerging growth company	☐

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. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐ Yes x No

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EXPLANATORY NOTE

On May 31, 2024, Summit Midstream Partners, LP (the “Partnership”) entered into an Agreement and Plan of Merger (the “Merger Agreement”) by and among Summit Midstream Corporation (“New Summit”), Summit SMC NewCo, LLC (“Merger Sub”), a wholly-owned subsidiary of New Summit, the Partnership and Summit Midstream GP, LLC, the general partner of the Partnership. Upon the terms and subject to the conditions set forth in the Merger Agreement, on August 1, 2024 (the closing date of the Corporate Reorganization, as defined below), Merger Sub merged with and into the Partnership, with the Partnership continuing as the surviving entity and a wholly-owned subsidiary of New Summit (the “Corporate Reorganization”). The Partnership remains a wholly-owned subsidiary of New Summit as of the date of this filing.

On August 1, 2024, the New York Stock Exchange (“NYSE”) filed a Form 25-NSE with the U.S. Securities and Exchange Commission to remove the common units representing limited partner interests in the Partnership from listing on the NYSE. Following the filing of this Form 10-Q, the Partnership expects to file a Form 15 to suspend its remaining reporting obligations under the Securities Exchange Act of 1934, as amended. Unless otherwise specified herein, all information in this report is provided as of June 30, 2024.

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TABLE OF CONTENTS


COMMONLY USED OR DEFINED TERMS		2

PART I	FINANCIAL INFORMATION
Item 1.	Financial Statements.
	Unaudited Condensed Consolidated Balance Sheets.	6
	Unaudited Condensed Consolidated Statements of Operations.	7
	Unaudited Condensed Consolidated Statements of Partners' Capital.	8
	Unaudited Condensed Consolidated Statements of Cash Flows.	9
	Notes to Unaudited Condensed Consolidated Financial Statements.	10
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations.	26
Item 3.	Quantitative and Qualitative Disclosures about Market Risk.	47
Item 4.	Controls and Procedures.	47
PART II	OTHER INFORMATION	48
Item 1.	Legal Proceedings.	48
Item 1A.	Risk Factors.	48
Item 5.	Other Information.	49
Item 6.	Exhibits.	49

SIGNATURES		51

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COMMONLY USED OR DEFINED TERMS



2015 Blacktail Release			a 2015 rupture of our four-inch produced water gathering pipeline near Williston, North Dakota
2022 DJ Acquisitions			the acquisition of Outrigger DJ Midstream LLC from Outrigger Energy II LLC, and each of Sterling Energy Investments LLC, Grasslands Energy Marketing LLC and Centennial Water Pipelines LLC from Sterling Investment Holdings LLC
2025 Senior Notes			Summit Holdings' and Finance Corp.’s 5.75% senior unsecured notes due April 2025

2026 Secured Notes			Summit Holdings' and Finance Corp.’s 8.500% senior secured second lien notes due October 2026
2026 Secured Notes Indenture			Indenture, dated as of November 2, 2021, by and among Summit Holdings, Finance Corp., the guarantors party thereto and Regions Bank, as trustee
2026 Unsecured Notes			Summit Holdings’ and Finance Corp.’s 12.00% senior unsecured notes due October 2026
2029 Notes			Summit Holdings’ 8.625% Senior Secured Second Lien Notes due October 2029
ABL Agreement			Loan and Security Agreement, dated as of November 2, 2021, among Summit Holdings, as borrower, SMLP and certain subsidiaries from time to time party thereto, as guarantors, Bank of America, N.A., as agent, ING Capital LLC, Royal Bank of Canada and Regions Bank, as co-syndication agents, and Bank of America, N.A., ING Capital LLC, RBC Capital Markets and Regions Capital Markets, as joint lead arrangers and joint bookrunners
ABL Facility			the asset-based lending credit facility governed by the ABL Agreement
ASU			Accounting Standards Update
Bcf/d			one billion cubic feet per day
Board of Directors			the board of directors of our General Partner

Co-Issuers			Summit Holdings and Finance Corp., as co-issuers of the 2025 Senior Notes, the 2026 Unsecured Notes and the 2026 Secured Notes
condensate			a natural gas liquid with a low vapor pressure, mainly composed of propane, butane, pentane and heavier hydrocarbon fractions
Corporate Reorganization			the August 1, 2024 consummation of a transaction that resulted in the Partnership becoming a wholly owned subsidiary of a newly formed Delaware corporation, Summit Midstream Corporation (taxed as a C-corporation)
DFW Midstream			DFW Midstream Services LLC
DJ Basin			Denver-Julesburg Basin
Double E			Double E Pipeline, LLC

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Double E Pipeline			a 135 mile, 1.35 Bcf/d, FERC-regulated interstate natural gas transmission pipeline that commenced operations in November 2021 and provides transportation service from multiple receipt points in the Delaware Basin to various delivery points in and around the Waha hub in Texas

Double E Project			the development and construction of the Double E Pipeline
EPA			Environmental Protection Agency

EPU			earnings or loss per unit
FASB			Financial Accounting Standards Board
Finance Corp.			Summit Midstream Finance Corp.
fracking			the process of injecting liquid at high pressure into subterranean rocks, boreholes, etc. so as to force open existing fissures and extract oil or gas
frac-protect activities			activities that are designed to protect existing hydrocarbon wells from harm by shutting in existing hydrocarbon production until new well activities have concluded
GAAP			accounting principles generally accepted in the United States of America
General Partner			Summit Midstream GP, LLC
GP			general partner

Grand River			Grand River Gathering, LLC
Guarantor Subsidiaries			Grand River, DFW Midstream, Summit Marketing, OpCo, Meadowlark Midstream, Summit Permian II, LLC, Epping Transmission Company, LLC, Red Rock Gathering, Polar Midstream, LLC, Summit Niobrara, Grasslands Energy Marketing LLC, Summit DJ-O, LLC, Summit DJ-O Operating, LLC, and Summit DJ-S, LLC.
Hub			geographic location of a storage facility and multiple pipeline interconnections

Mbbl/d			one thousand barrels per day
MD&A			Management's Discussion and Analysis of Financial Condition and Results of Operations
Meadowlark Midstream			Meadowlark Midstream Company, LLC
MMBTU			metric million British thermal units
MMcf/d			one million cubic feet per day
Mountaineer Midstream			Mountaineer Midstream Company, LLC
MVC			minimum volume commitment
NGLs			natural gas liquids; the combination of ethane, propane, normal butane, iso-butane and natural gasolines that when removed from unprocessed natural gas streams become liquid under various levels of higher pressure and lower temperature

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NYSE			New York Stock Exchange


OCC			Ohio Condensate Company, L.L.C.
OGC			Ohio Gathering Company, L.L.C.
Ohio Gathering			Ohio Gathering Company, L.L.C. and Ohio Condensate Company, L.L.C.
OpCo			Summit Midstream OpCo, LP
play			a proven geological formation that contains commercial amounts of hydrocarbons

Permian Holdco			Summit Permian Transmission Holdco, LLC
Permian Term Loan Facility			the term loan governed by the Credit Agreement, dated as of March 8, 2021, among Summit Permian Transmission, LLC, as borrower, MUFG Bank Ltd., as administrative agent, Mizuho Bank (USA), as collateral agent, ING Capital LLC, Mizuho Bank, Ltd. and MUFG Union Bank, N.A., as L/C issuers, coordinating lead arrangers and joint bookrunners, and the lenders from time to time party thereto
Permian Transmission Credit Facilities			the credit facilities governed by the Credit Agreement, dated as of March 8, 2021, among Summit Permian Transmission, LLC, as borrower, MUFG Bank Ltd., as administrative agent, Mizuho Bank (USA), as collateral agent, ING Capital LLC, Mizuho Bank, Ltd. and MUFG Union Bank, N.A., as L/C issuers, coordinating lead arrangers and joint bookrunners, and the lenders from time to time party thereto

produced water			water from underground geologic formations that is a by-product of natural gas and crude oil production
Red Rock Gathering			Red Rock Gathering Company, LLC
SEC			Securities and Exchange Commission
Securities Act			Securities Act of 1933, as amended
segment adjusted EBITDA			total revenues less total costs and expenses; plus (i) other income excluding interest income, (ii) our proportional adjusted EBITDA for equity method investees, (iii) depreciation and amortization, (iv) adjustments related to MVC shortfall payments, (v) adjustments related to capital reimbursement activity, (vi) unit-based and noncash compensation, (vii) impairments and (viii) other noncash expenses or losses, less other noncash income or gains
Senior Notes			The 2025 Senior Notes, the 2026 Unsecured Notes and the 2026 Secured Notes, collectively
Series A Preferred Units			Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units issued by the Partnership
shortfall payment			the payment received from a counterparty when its volume throughput does not meet its MVC for the applicable period
SMLP			Summit Midstream Partners, LP
SMLP LTIP			SMLP 2022 Long-Term Incentive Plan

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SOFR			Secured Overnight Financing Rate
Subsidiary Series A Preferred Units			Series A Fixed Rate Cumulative Redeemable Preferred Units issued by Permian Holdco
Summit Holdings			Summit Midstream Holdings, LLC
Summit Investments			Summit Midstream Partners, LLC
Summit Marketing			Summit Midstream Marketing, LLC
Summit Niobrara			Summit Midstream Niobrara, LLC

Summit Permian II			Summit Midstream Permian II, LLC
Summit Permian Transmission			Summit Permian Transmission, LLC
Summit Utica			Summit Midstream Utica, LLC
the Partnership			Summit Midstream Partners, LP and its subsidiaries
the Partnership Agreement			the Fourth Amended and Restated Agreement of Limited Partnership of the Partnership dated May 28, 2020, as amended
throughput volume			the volume of natural gas, crude oil or produced water gathered, transported or passing through a pipeline, plant or other facility during a particular period; also referred to as volume throughput
unconventional resource basin			a basin where natural gas or crude oil production is developed from unconventional sources that require hydraulic fracturing as part of the completion process, for instance, natural gas produced from shale formations and coalbeds; also referred to as an unconventional resource play
wellhead			the equipment at the surface of a well, used to control the well's pressure; also, the point at which the hydrocarbons and water exit the ground

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PART I - FINANCIAL INFORMATION

Item 1. Financial Statements.

SUMMIT MIDSTREAM PARTNERS, LP AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS


	June 30, 2024		December 31, 2023
	(In thousands, except unit amounts)
ASSETS
Cash and cash equivalents	$	156,008	$	14,044
Restricted cash	4,208		2,601
Accounts receivable	55,991		76,275
Other current assets	5,227		5,502
Total current assets	221,434		98,422
Property, plant and equipment, net	1,366,522		1,698,585
Intangible assets, net	143,735		175,592
Investment in equity method investees	271,622		486,434
Other noncurrent assets	29,625		35,165
TOTAL ASSETS	$	2,032,938	$	2,494,198

LIABILITIES AND CAPITAL
Trade accounts payable	$	19,090	$	22,714
Accrued expenses	32,494		32,377
Deferred revenue	8,305		10,196
Ad valorem taxes payable	4,819		8,543
Accrued compensation and employee benefits	4,943		6,815
Accrued interest	16,160		19,298
Accrued environmental remediation	1,764		1,483
Accrued settlement payable	6,667		6,667
Current portion of long-term debt	65,708		15,524
Other current liabilities	6,695		10,395
Total current liabilities	166,645		134,012
Long-term debt, net	861,676		1,455,166
Noncurrent deferred revenue	29,496		30,085
Noncurrent accrued environmental remediation	1,198		1,454
Other noncurrent liabilities	21,839		30,266
TOTAL LIABILITIES	1,080,854		1,650,983
Commitments and contingencies (Note 14)

Mezzanine Capital
Subsidiary Series A Preferred Units (93,039 units issued and outstanding at June 30, 2024 and December 31, 2023)	129,032		124,652

Partners' Capital
Series A Preferred Units (65,508 units issued and outstanding at June 30, 2024 and December 31, 2023)	103,426		96,893
Common limited partner capital (10,648,685 and 10,376,189 units issued and outstanding at June 30, 2024 and December 31, 2023, respectively)	719,626		621,670
Total partners' capital	823,052		718,563
TOTAL LIABILITIES AND CAPITAL	$	2,032,938	$	2,494,198

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

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SUMMIT MIDSTREAM PARTNERS, LP AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS


	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
	(In thousands, except per-unit amounts)
Revenues:
Gathering services and related fees	$	45,213	$	57,086	$	107,198	$	114,457
Natural gas, NGLs and condensate sales	47,959		36,082		97,051		85,245
Other revenues	8,143		4,725		15,937		10,690
Total revenues	101,315		97,893		220,186		210,392
Costs and expenses:
Cost of natural gas and NGLs	29,619		19,975		59,801		50,857
Operation and maintenance	23,440		25,158		48,452		49,130
General and administrative	14,164		10,812		28,949		20,799
Depreciation and amortization	23,917		30,132		51,784		59,956
Transaction costs	3,271		480		11,062		782
Acquisition integration costs	—		723		40		2,225
(Gain) loss on asset sales, net	34		(75)		7		(143)
Long-lived asset impairments	20		455		67,936		455
Total costs and expenses	94,465		87,660		268,031		184,061
Other income, net	2,131		1,006		2,118		1,062
Gain on interest rate swaps	920		3,268		3,510		1,995
Gain (loss) on sale of business	(2,192)		(54)		84,010		(36)
Gain on sale of Ohio Gathering	—		—		126,261		—
Interest expense	(31,457)		(35,175)		(69,303)		(69,398)
Loss on early extinguishment of debt	(4,964)		—		(4,964)		—
Income (loss) before income taxes and equity method investment income	(28,712)		(20,722)		93,787		(40,046)
Income tax benefit	654		—		444		252
Income from equity method investees	4,280		7,182		14,918		12,091
Net income (loss)	$	(23,778)	$	(13,540)	$	109,149	$	(27,703)
Less: Net income attributable to Subsidiary Series A Preferred Units	(3,866)		(3,496)		(7,636)		(5,242)
Net income (loss) attributable to Summit Midstream Partners, LP	$	(27,644)	$	(17,036)	$	101,513	$	(32,945)
Less: net income attributable to Series A Preferred Units	(3,313)		(2,799)		(6,533)		(5,438)
Net income (loss) attributable to common limited partners	$	(30,957)	$	(19,835)	$	94,980	$	(38,383)
Net income (loss) per limited partner unit:
Common unit – basic	$	(2.91)	$	(1.91)	$	9.00	$	(3.73)
Common unit – diluted	$	(2.91)	$	(1.91)	$	8.57	$	(3.73)

Weighted-average limited partner units outstanding:
Common units – basic	10,649		10,369		10,549		10,291
Common units – diluted	10,649		10,369		11,081		10,291

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

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SUMMIT MIDSTREAM PARTNERS, LP AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL


	Partners' Capital
		Series A Preferred Units		Common Limited Partners Capital		Total
		(In thousands)
Partners' capital, December 31, 2023		$	96,893	$	621,670	$	718,563
Net income		3,220		125,937		129,157
Unit-based compensation		—		2,772		2,772
Tax withholdings and associated payments on vested SMLP LTIP awards		—		(1,878)		(1,878)

Partners' capital, March 31, 2024		$	100,113	$	748,501	$	848,614
Net income (loss)		3,313		(30,957)		(27,644)
Unit-based compensation		—		2,086		2,086
Tax withholdings and associated payments on vested SMLP LTIP awards		—		(4)		(4)
Partners' capital, June 30, 2024		$	103,426	$	719,626	$	823,052


	Partners' Capital
		Series A Preferred Units		Common Limited Partners Capital		Total
		(In thousands)
Partners' capital, December 31, 2022		$	85,327	$	679,491	$	764,818
Net income (loss)		2,639		(18,548)		(15,909)
Unit-based compensation		—		1,929		1,929
Tax withholdings and associated payments on vested SMLP LTIP awards		—		(1,136)		(1,136)


Partners' capital, March 31, 2023		$	87,966	$	661,736	$	749,702
Net income (loss)		2,799		(19,835)		$	(17,036)
Unit-based compensation		—		1,833		1,833
Tax withholdings and associated payments on vested SMLP LTIP awards		—		(148)		(148)
Partners' capital, June 30, 2023		$	90,765	$	643,586	$	734,351

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

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SUMMIT MIDSTREAM PARTNERS, LP AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS


	Six Months Ended June 30,
	2024		2023
	(In thousands)
Cash flows from operating activities:
Net income (loss)	$	109,149	$	(27,703)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	52,254		60,425
Noncash lease expense	1,705		2,827
Amortization of debt issuance costs	6,903		6,325
Unit-based and noncash compensation	4,858		3,762
Income from equity method investees	(14,918)		(12,091)
Distributions from equity method investees	23,659		23,904

Interest income and other	(2,498)		(175)

Loss on early extinguishment of debt	4,964		—
Gain on sale of business	(84,010)		—
Gain on sale of equity method investment	(126,261)		—
Unrealized (gain) loss on interest rate swaps	(853)		423
Long-lived asset impairment	67,936		455
Changes in operating assets and liabilities:
Accounts receivable	14,462		14,783
Trade accounts payable	(6,076)		81
Accrued expenses	(702)		(1,429)
Deferred revenue, net	(2,153)		(2,331)
Ad valorem taxes payable	(3,724)		(4,247)
Accrued interest	(3,138)		1,049
Accrued environmental remediation, net	26		(556)
Other, net	(10,610)		(13,862)
Net cash provided by operating activities	30,973		51,640
Cash flows from investing activities:
Capital expenditures	(26,920)		(32,178)
Proceeds from Summit Utica Sale (excluding Ohio Gathering)	292,266		—
Proceeds from sale of Ohio Gathering	332,734		—
Proceeds from Mountaineer Transaction	70,000		—
Proceeds from asset sale	4,400		128
Investment in Double E equity method investee	(442)		(3,500)

Other, net	—		(2,667)
Net cash provided by (used in) investing activities	672,038		(38,217)
Cash flows from financing activities:

Debt repayments - ABL Facility	(313,000)		(37,000)
Debt repayments - Redemption of 2026 Unsecured Notes	(209,510)		—
Debt repayments - 2026 Secured Notes (Excess Cash Flow Offer)	(13,626)		—
Debt repayments - 2026 Secured Notes (Asset Sale Offer)	(6,910)		—
Debt repayments - Permian Transmission Term Loan	(7,621)		(5,120)
Borrowings on ABL Facility	—		35,000
Distributions on Subsidiary Series A Preferred Units	(3,256)		(3,256)
Debt extinguishment costs	(2,095)		—
Debt issuance costs	—		(168)

Other, net	(3,422)		(1,533)
Net cash used in financing activities	(559,440)		(12,077)
Net change in cash, cash equivalents and restricted cash	143,571		1,346
Cash, cash equivalents and restricted cash, beginning of period	16,645		13,531
Cash, cash equivalents and restricted cash, end of period	$	160,216	$	14,877

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

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SUMMIT MIDSTREAM PARTNERS, LP AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION

Organization. Summit Midstream Partners, LP (including its subsidiaries, collectively “SMLP” or the “Partnership”) is a Delaware limited partnership that was formed in May 2012 and began operations in October 2012. SMLP is a value-oriented limited partnership focused on developing, owning and operating midstream energy infrastructure assets that are strategically located in unconventional resource basins, primarily shale formations, in the continental United States. The Partnership’s business activities are primarily conducted through various operating subsidiaries, each of which is owned or controlled by its wholly owned subsidiary holding company, Summit Holdings, a Delaware limited liability company.

Business Operations. The Partnership provides natural gas gathering, compression, treating and processing services as well as crude oil and produced water gathering services pursuant to primarily long-term, fee-based agreements with its customers. In addition to these services, the Partnership also provides freshwater delivery services pursuant to short-term agreements with customers. The Partnership’s results are primarily driven by the volumes of natural gas that it gathers, compresses, treats and/or processes as well as by the volumes of crude oil and produced water that it gathers. As of June 30, 2024, other than the Partnership’s investment in Double E, all of its business activities are conducted through wholly owned operating subsidiaries.

Presentation and Consolidation. The Partnership prepares its condensed consolidated financial statements in accordance with GAAP as established by the FASB and pursuant to the rules and regulations of the SEC pertaining to interim financial information. The unaudited condensed consolidated financial statements contained in this report include all normal and recurring material adjustments that, in the opinion of management, are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods presented herein. These unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and related notes that are included in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2023.

The Partnership makes estimates and assumptions that affect the reported amounts of assets and liabilities at the balance sheet dates, including fair value measurements, the reported amounts of revenues and expenses and the disclosure of commitments and contingencies. Although management believes these estimates are reasonable, actual results could differ from its estimates.

The unaudited condensed consolidated financial statements include the assets, liabilities and results of operations of SMLP and its subsidiaries. All intercompany transactions among the consolidated entities have been eliminated in consolidation. Comprehensive income or loss is the same as net income or loss for all periods presented.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP

There have been no changes to the Partnership’s significant accounting policies since December 31, 2023.

Accounting standards recently implemented. ASU No. 2020-06 Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815–40) (“ASU 2020-06”). ASU 2020-06 simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity. The ASU is part of the FASB’s simplification initiative, which aims to reduce unnecessary complexity in GAAP. The ASU’s amendments are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. The provisions of ASU 2020-06 did not have a material impact on the Partnership’s condensed consolidated financial statements and disclosures.

New accounting standards not yet implemented. ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). ASU 2023-07 enhances disclosures on reportable segments and provides additional detailed information about significant segment expenses. The guidance in ASU 2023-07 is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The Partnership continues to assess the impact of the new guidance, but does not expect the provisions of ASU 2023-07 will have a material impact on its consolidated financial statements and disclosures.

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3. DIVESTITURES

Summit Utica Sale. On March 22, 2024, the Partnership completed the disposition of Summit Utica, LLC (“Summit Utica”) to a subsidiary of MPLX LP (“MPLX”) for a cash sale price of $625.0 million, subject to customary post-closing adjustments (the “Utica Sale”). Summit Utica was the owner of (i) approximately 36% of the issued and outstanding equity interests in OGC, (ii) approximately 38% of the issued and outstanding equity interests in OCC, together with OGC, Ohio Gathering and (iii) midstream assets located in the Utica Shale. Ohio Gathering was the owner of a natural gas gathering system and condensate stabilization facility located in Belmont and Monroe counties in the Utica Shale in southeastern Ohio.

During the quarterly period ended March 31, 2024, the Partnership recognized a total gain on the disposition of Summit Utica of $212.5 million based on total cash proceeds received of $625.0 million and net assets sold of $412.5 million. A portion of the cash proceeds was used to reduce amounts outstanding under the ABL Facility and pay the costs and expenses in connection with the Asset Sale Offer (as defined below) (see Note 8 - Debt, for additional information) and are subject to final working capital adjustments.

The $625.0 million sale price did not discretely list values for either OGC, OCC or the Partnership’s midstream assets located in the Utica Shale. Using fair value methods allowed by GAAP, the Partnership derived a preliminary fair value estimate for the disposed assets and then determined the appropriate gain recognition amount for each disposal to include in its unaudited condensed consolidated financial statements. The estimated fair values were determined utilizing a discounted cash flow technique based on estimated revenues, costs, capital expenditures and an appropriate discount rate. Given the unobservable nature of the inputs, the fair value measurement is deemed to use Level 3 inputs. These fair value estimates are preliminary, and subject to change and such changes could be material. Based on these preliminary fair values, the Partnership recognized a gain on the disposition of the Utica midstream business of $85.6 million, which is recorded within gain on sale of business in the unaudited condensed consolidated statements of operations, and a gain of $126.3 million related to the disposition of Ohio Gathering, which is recorded within gain on sale of Ohio Gathering in the unaudited condensed consolidated statements of operations.

Mountaineer Midstream System. On May 1, 2024, the Partnership completed the sale of its Mountaineer Midstream system, to Antero Midstream LLC for a cash sale price of $70.0 million, subject to customary post-closing adjustments (the “Mountaineer Transaction”). Mountaineer Midstream was the owner of midstream assets located in the Marcellus Shale. Prior to closing the Mountaineer Transaction, the Partnership sold related compression assets located in the Marcellus Shale to a compression service provider for cash consideration of approximately $5 million in April 2024.

During the three months ended March 31, 2024, the Partnership recognized an impairment of $68 million in connection with the Mountaineer Transaction and the sale of compression assets based on their estimated fair value and net assets of approximately $143 million.

4. REVENUE

The following table presents estimated revenue, as of June 30, 2024, expected to be recognized during the remainder of 2024 and over the remaining contract period related to performance obligations that are unsatisfied and are comprised of estimated MVC shortfall payments.


(In thousands)	2024		2025		2026		2027		2028		Thereafter

Gathering services and related fees	$	23,926	$	37,249	$	26,112	$	7,685	$	5,137	$	—

Revenue by category. In the following tables, revenue is disaggregated by geographic area and major products and services. For more detailed information about reportable segments, see Note 15 – Segment Information.

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	Three Months Ended June 30, 2024
	Gathering services and related fees		Natural gas, NGLs and condensate sales		Other revenues		Total
	(In thousands)
Reportable Segments:
Northeast	$	1,998	$	—	$	—	$	1,998
Rockies	16,323		47,214		3,321		66,858
Permian	—		—		911		911
Piceance	18,063		666		1,234		19,963
Barnett	8,829		79		2,026		10,934
Total reportable segments	45,213		47,959		7,492		100,664
Corporate and other	—		—		651		651
Total	$	45,213	$	47,959	$	8,143	$	101,315


	Six Months Ended June 30, 2024
	Gathering services and related fees		Natural gas, NGLs and condensate sales		Other revenues		Total
	(In thousands)
Reportable Segments:
Northeast	$	18,851	$	—	$	—	$	18,851
Rockies	32,839		95,184		7,429		135,452
Permian	—		—		1,821		1,821
Piceance	38,450		1,614		2,479		42,543
Barnett	17,058		253		3,483		20,794
Total reportable segments	107,198		97,051		15,212		219,461
Corporate and other	—		—		725		725
Total	$	107,198	$	97,051	$	15,937	$	220,186


	Three Months Ended June 30, 2023
	Gathering services and related fees		Natural gas, NGLs and condensate sales		Other revenues		Total
	(In thousands)
Reportable Segments:
Northeast	$	12,805	$	—	$	—	$	12,805
Rockies	14,909		34,575		725		50,209
Permian	—		—		892		892
Piceance	20,014		1,335		1,373		22,722
Barnett	9,358		172		1,736		11,266
Total reportable segments	57,086		36,082		4,726		97,894
Corporate and other	—		—		(1)		(1)
Total	$	57,086	$	36,082	$	4,725	$	97,893

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	Six Months Ended June 30, 2023
	Gathering services and related fees		Natural gas, NGLs and condensate sales		Other revenues		Total
	(In thousands)
Reportable Segments:
Northeast	$	25,560	$	—	$	—	$	25,560
Rockies	30,212		81,904		3,344		115,460
Permian	—		—		1,785		1,785
Piceance	39,133		2,976		2,799		44,908
Barnett	19,552		365		2,800		22,717
Total reportable segments	114,457		85,245		10,728		210,430
Corporate and other	—		—		(38)		(38)
Total	$	114,457	$	85,245	$	10,690	$	210,392

5. PROPERTY, PLANT AND EQUIPMENT

Details on the Partnership’s property, plant and equipment follow.


	June 30, 2024		December 31, 2023
	(In thousands)
Gathering and processing systems and related equipment	$	1,932,418	$	2,335,980
Construction in progress	42,338		56,064
Land and line fill	11,534		11,534
Other	64,834		65,029
Total	2,051,124		2,468,607
Less: accumulated depreciation	(684,602)		(770,022)
Property, plant and equipment, net	$	1,366,522	$	1,698,585

Depreciation expense and capitalized interest for the Partnership follow.


	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
	(In thousands)				(In thousands)
Depreciation expense	$	20,357	$	23,285	$	43,928	$	46,204
Capitalized interest	175		246		647		439

6. EQUITY METHOD INVESTMENTS

As of June 30, 2024, the Partnership has an equity method investment in Double E, the balance of which is included in the Investment in equity method investees caption on the unaudited condensed consolidated balance sheets. On March 22, 2024, in connection with the Utica Sale, the Partnership sold its investment in Ohio Gathering and recognized an estimated $126.3 million gain, which is recorded within Gain on sale of Ohio Gathering within the unaudited condensed consolidated statements of operations. See Note 3 - Divestitures for additional information.

Details of the Partnership’s equity method investments follow.


	June 30, 2024		December 31, 2023
	(In thousands)
Double E	$	271,622	$	276,221
Ohio Gathering	—		210,213
Total	$	271,622	$	486,434

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7. DEFERRED REVENUE

The balances in deferred revenue as of June 30, 2024 and December 31, 2023 are primarily related to contributions in aid of construction which will be recognized as revenue over the life of the contract. An update of current deferred revenue follows.


	Total
	(In thousands)
Current deferred revenue, December 31, 2023	$	10,196
Add: additions	3,830
Less: revenue recognized and other	(5,721)
Current deferred revenue, June 30, 2024	$	8,305

An update of noncurrent deferred revenue follows.


	Total
	(In thousands)
Noncurrent deferred revenue, December 31, 2023	$	30,085
Add: additions	3,378
Less: reclassification to current deferred revenue and other	(3,967)
Noncurrent deferred revenue, June 30, 2024	$	29,496

8. DEBT

Debt for the Partnership at June 30, 2024 and December 31, 2023, follows:


	June 30, 2024		December 31, 2023
	(In thousands)
ABL Facility: Summit Holdings' asset based credit facility due May 1, 2026	$	—	$	313,000

Permian Transmission Term Loan: Summit Permian Transmission's variable rate senior secured term loan due January 2028	137,225		144,846
2026 Unsecured Notes: 12.00% senior unsecured notes due October 15, 2026	—		209,510
2025 Senior Notes: 5.75% senior unsecured notes due April 15, 2025	49,783		49,783
2026 Secured Notes: 8.50% senior second lien notes due October 15, 2026	764,464		785,000
Less: unamortized debt discount and debt issuance costs	(24,088)		(31,449)
Total debt, net of unamortized debt discount and debt issuance costs	927,384		1,470,690
Less: current portion of Permian Transmission Term Loan and 2025 Senior Notes redemption	(65,708)		(15,524)
Total long-term debt	$	861,676	$	1,455,166

ABL Facility. On November 2, 2021, the Partnership, the Partnership’s subsidiary, Summit Holdings, and certain subsidiaries of Summit Holdings party thereto entered into a first-lien, senior secured credit facility, consisting of a $400.0 million asset-based revolving credit facility (the “ABL Facility”), subject to a borrowing base comprised of a percentage of eligible accounts receivable of Summit Holdings and its subsidiaries that guarantee the ABL Facility (collectively, the “ABL Facility Subsidiary Guarantors”) and a percentage of eligible above-ground fixed assets including eligible compression units, processing plants, compression stations and related equipment of Summit Holdings and the ABL Facility Subsidiary Guarantors. As of June 30, 2024, the most recent borrowing base determination of eligible assets totaled $632.1 million, an amount greater than the $400.0 million of aggregate lending commitments.

As of June 30, 2024, the ABL Facility will mature on May 1, 2026; provided that if the outstanding amount of the 2025 Senior Notes (or any permitted refinancing indebtedness in respect thereof that has a final maturity, scheduled amortization or any other scheduled repayment, mandatory prepayment, mandatory redemption or sinking fund obligation prior to the date that is 120 days after the Termination Date (as defined in the ABL Agreement)) on such date equals or exceeds $50.0 million, then the ABL Facility will mature on December 13, 2024. As of June 30, 2024, the outstanding balance of the 2025 Senior Notes was $49.8 million.

As of June 30, 2024, the available borrowing capacity of the ABL Facility totaled $371.7 million after giving effect to the issuance of $4.3 million in outstanding but undrawn irrevocable standby letters of credit and $24.0 million of commitment reserves.

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In connection with the closing of the Utica Sale, the ABL Facility was amended to, among other things, (i) permit the Utica Sale, (ii) amend the change of control provision and certain other provisions to permit certain structural changes in connection with a conversion to a C-corporation and (iii) amend the Interest Coverage Ratio (as defined in the ABL Agreement) covenant such that the Interest Coverage Ratio as of the last day of any fiscal quarter must be less than (a) for any fiscal quarter ending on or before December 31, 2024, (x) if no loans under the Credit Agreement are outstanding and unrestricted cash exceeds $200.0 million on such date, 1.50:1.00 and (y) if any loans under the Credit Agreement are outstanding or unrestricted cash is less than such threshold on such date, 1.75:1.00 and (b) for any fiscal quarter ending after December 31, 2024, 1.90:1.00.

The ABL Facility also requires that Summit Holdings not permit the First Lien Net Leverage Ratio (as defined in the ABL Agreement) as of the last day of any fiscal quarter to be greater than 2.50:1.00. The Partnership is in compliance with the financial covenants of the ABL Facility.

A portion of the proceeds from the Utica Sale were used to repay all amounts outstanding under the ABL Facility. As of June 30, 2024, there were no amounts outstanding under the ABL Facility.

For additional information, see Note 16 – Subsequent Events.

Permian Transmission Credit Facilities. On March 8, 2021, the Partnership’s unrestricted subsidiary, Summit Permian Transmission, entered into a Credit Agreement which allows for $175.0 million of senior secured credit facilities (the “Permian Transmission Credit Facilities”), including a $160.0 million Term Loan Facility and a $15.0 million working capital facility. The Permian Transmission Credit Facilities can be used to finance Summit Permian Transmission’s capital calls associated with its investment in Double E, debt service and other general corporate purposes. Unexpended proceeds from draws on the Permian Transmission Credit Facilities are classified as restricted cash on the accompanying unaudited condensed consolidated balance sheets.

As of June 30, 2024, the applicable margin under adjusted term SOFR borrowings was 2.475%, the average interest rate was 7.79% and the unused portion of the Permian Transmission Credit Facilities totaled $4.5 million, subject to a commitment fee of 0.7% after giving effect to the issuance of $10.5 million in outstanding but undrawn irrevocable standby letters of credit. Summit Permian Transmission, LLC entered into interest rate hedges with notional amounts representing approximately 90% of the Permian Term Loan facility at a fixed SOFR rate of 1.23%. The Partnership is in compliance with the financial covenants of the Permian Transmission Credit Facilities.

Permian Transmission Term Loan. In accordance with the terms of the Permian Transmission Credit Facilities, in January 2022, the Permian Term Loan Facility was converted into a Term Loan (the “Permian Transmission Term Loan”). The Permian Transmission Term Loan is due January 2028. As of June 30, 2024, the applicable margin under adjusted term SOFR borrowings was 2.475% and the average interest rate was 7.79%. The Partnership is in compliance with the financial covenants governing the Permian Transmission Term Loan.

In accordance with the terms of the Permian Transmission Term Loan, Summit Permian Transmission is required to make mandatory principal repayments. Below is a summary of the remaining mandatory principal repayments as of June 30, 2024:


(In thousands)	Total		2024		2025		2026		2027		2028
Amortizing principal repayments	$	137,225	$	7,903	$	16,580	$	16,967	$	17,769	$	78,006

2026 Secured Notes. In 2021, the Co-Issuers issued $700.0 million of 8.500% Senior Secured Second Lien Notes due 2026 to eligible purchasers pursuant to Rule 144A and Regulation S of the Securities Act, at a price of 98.5% of their face value. Additionally, in November 2022, in connection with the 2022 DJ Acquisitions, the Co-Issuers issued an additional $85.0 million of 2026 Secured Notes at a price of 99.26% of their face value. The 2026 Secured Notes will pay interest semi-annually on April 15 and October 15 of each year, commencing on April 15, 2022 and are jointly and severally guaranteed, on a senior second-priority secured basis (subject to permitted liens), by the Partnership and each restricted subsidiary of the Partnership (other than the Co-Issuers) that is an obligor under the ABL Agreement, or under the Co-Issuers’ 2025 Senior Notes on the issue date of the 2026 Secured Notes.

The 2026 Secured Notes are effectively subordinated to any of our or the guarantors’ current and future secured first lien indebtedness, including indebtedness incurred under the ABL Facility, to the extent of the value of the collateral securing such indebtedness, and our and the guarantors’ current and future debt that is secured by liens on assets other than the collateral, to the extent of the value of such assets. The 2026 Secured Notes are structurally subordinated to all indebtedness and other liabilities of our subsidiaries that do not guarantee the 2026 Secured Notes (including, but not limited to, the Permian Transmission Credit Facilities and the Subsidiary Series A Preferred Units). The 2026 Secured Notes are effectively equal to our and the guarantors’ obligations under any future second lien indebtedness and effectively senior to all of our future junior lien indebtedness and existing and future unsecured indebtedness, including our outstanding senior unsecured notes, to the

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extent of the value of the collateral, and senior to any of our future subordinated indebtedness. The 2026 Secured Notes will mature on October 15, 2026.

On and after October 15, 2023, the Co-Issuers may redeem all or part of the 2026 Secured Notes at redemption prices (expressed as percentages of principal amount) equal to: (a) 104.250% for the twelve-month period beginning October 15, 2023; (b) 102.125% for the twelve-month period beginning October 15, 2024; and (c) 100.000% for the twelve-month period beginning on October 15, 2025 and at any time thereafter, in each case plus accrued and unpaid interest, if any, to, but not including the redemption date. The Partnership is in compliance with the covenants governing its 2026 Secured Notes.

Starting in the first quarter of 2023 with respect to the fiscal year ended 2022, and continuing annually through the fiscal year ended 2025, the Partnership is required under the terms of the 2026 Secured Notes Indenture to, if it has Excess Cash Flow (as defined in the 2026 Secured Notes Indenture), and subject to its ability to make such an offer under the ABL Facility, offer to purchase an amount of the 2026 Secured Notes, at 100% of the principal amount plus accrued and unpaid interest, equal to 100% of the Excess Cash Flow generated in the prior year. Excess Cash Flow is generally defined as consolidated cash flow minus the sum of capital expenditures and cash payments in respect of permitted investments and permitted restricted payments.

Generally, if the Partnership does not offer to purchase designated annual amounts of its 2026 Secured Notes or reduce its first lien capacity under the 2026 Secured Notes Indenture per annum from 2023 through 2025, the interest rate on the 2026 Secured Notes is subject to certain rate escalations. Per the terms of the 2026 Secured Notes Indenture, the designated amounts are to offer to purchase $50.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2023, otherwise the interest rate shall automatically increase by 50 basis points per annum; $100.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2024, otherwise the interest rate shall automatically increase by 100 basis points per annum (minus any amount previously increased); and $200.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2025, otherwise the interest rate shall automatically increase by 200 basis points per annum (minus any amount previously increased).

Based on the amount of our Excess Cash Flow for the fiscal year ended 2023, on March 27, 2024, the Partnership commenced a cash tender offer to purchase up to $19.3 million aggregate principal amount of the outstanding 2026 Secured Notes at 100% of the principal amount plus accrued and unpaid interest. The cash flow offer expired on April 24, 2024 with $13.6 million tendered and validly accepted and fully discharged as of June 30, 2024 (the “Excess Cash Flow Offer”).

As of April 1, 2024, the Partnership had not made offers to purchase in the required amount of $100.0 million and the interest rate on the 2026 Secured Notes increased an incremental 50 basis points to 9.50% effective on such date.

On May 7, 2024, the Co-Issuers commenced a cash tender offer to purchase up to $215.0 million of the outstanding 2026 Secured Notes (the “Asset Sale Offer”). The Asset Sale Offer expired on June 5, 2024 with $6.9 million of the 2026 Secured Notes tendered and validly accepted and fully discharged as of June 30, 2024.

To the extent the Partnership makes an offer to purchase, and the offer is not fully accepted by the holders of the 2026 Secured Notes, the Partnership may use any remaining amount not accepted for any purpose not prohibited by the 2026 Secured Notes Indenture or the ABL Facility.

For additional information, see Note 16 – Subsequent Events.

2026 Unsecured Notes. In November 2023, the Co-Issuers issued a total of $209.5 million aggregate principal amount of 2026 Unsecured Notes in exchange for $180.0 million aggregate principal amount of the 2025 Senior Notes and $29.5 million in cash. The cash raised was used to repurchase $29.7 million aggregate principal amount of the remaining 2025 Senior Notes that were not exchanged. The Partnership paid interest on the 2026 Unsecured Notes semi-annually in cash in arrears on April 15 and October 15 of each year.

On June 7, 2024, the Co-Issuers delivered a redemption notice with respect to all $209.5 million of the outstanding 2026 Unsecured Notes. On June 24, 2024, the 2026 Unsecured Notes were fully repaid and discharged. As of June 30, 2024, no amounts of the 2026 Unsecured Notes remained outstanding.

2025 Senior Notes. In February 2017, the Co-Issuers co-issued the 2025 Senior Notes. The Partnership pays interest on the 2025 Senior Notes semi-annually in cash in arrears on April 15 and October 15 of each year. The 2025 Senior Notes are senior, unsecured obligations and rank equally in right of payment with all of the Partnership’s existing and future senior obligations. The 2025 Senior Notes are effectively subordinated in right of payment to all of the Partnership’s secured indebtedness, to the extent of the collateral securing such indebtedness including indebtedness incurred under the ABL Facility and the 2026 Secured Notes.

The Co-Issuers have the right to redeem all or part of the 2025 Senior Notes at a redemption price of 100.00%, plus accrued and unpaid interest, if any, to, but not including the redemption date.

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As discussed above, in November, 2023, the Partnership exchanged $180.0 million aggregate principal amount of the 2025 Senior Notes and repurchased $29.7 million aggregate principal amount of the remaining 2025 Senior Notes that were not exchanged.

The Partnership is in compliance with the covenants of the 2025 Senior Notes. The 2025 Senior Notes mature on April 15, 2025.

For additional information, see Note 16 – Subsequent Events.

9. FINANCIAL INSTRUMENTS

Fair Value. A summary of the estimated fair value of our debt financial instruments follows.


	June 30, 2024				December 31, 2023
	Carrying Value (1)		Estimated fair value (Level 2)		Carrying Value (1)		Estimated fair value (Level 2)
	(In thousands)

2025 Senior Notes	$	49,783	$	49,451	$	49,783	$	48,414
2026 Secured Notes	$	764,464	$	785,818	$	785,000	$	778,131
2026 Unsecured Notes	$	—	$	—	$	209,510	$	203,225

(1) Excludes applicable unamortized debt issuance costs and debt discounts.

The carrying values on the balance sheets of the ABL Facility and Permian Transmission Term Loan represent their fair value due to their floating interest rates. The fair values of the 2026 Unsecured Notes, 2026 Secured Notes and 2025 Senior Notes are based on an average of nonbinding broker quotes as of June 30, 2024 and December 31, 2023. The use of different market assumptions or valuation methodologies may have a material effect on their estimated fair value of the Senior Notes.

Deferred earn-out. The Partnership’s deferred earn-out liability was settled in full during the quarterly period ended June 30, 2024. As of December 31, 2023, the estimated fair value of the deferred earn-out liability was $5.1 million, and was estimated using a discounted cash flow technique based on estimated future freshwater deliveries and appropriate discount rates. Given the unobservable nature of the inputs, the fair value measurement of the deferred earn-out is deemed to use Level 3 inputs.

Interest Rate Swaps. In connection with the Permian Transmission Term Loan, the Partnership entered into amortizing interest rate swap agreements. As of June 30, 2024 and December 31, 2023, the outstanding notional amounts of interest rate swaps were $123.5 million and $130.4 million, respectively. These interest rate swaps manage exposure to variability in expected cash flows attributable to interest rate risk. Interest rate swaps convert a portion of the Partnership’s variable rate debt to fixed rate debt. The Partnership chooses counterparties for its derivative instruments that it believes are creditworthy at the time the transactions are entered into, and the Partnership actively monitors the creditworthiness where applicable. However, there can be no assurance that a counterparty will be able to meet its obligations to the Partnership. The Partnership presents its derivative positions on a gross basis and does not net the asset and liability positions.

As of June 30, 2024 and December 31, 2023, the Partnership’s interest rate swap agreements had a fair value of $12.8 million and $11.9 million, respectively, and are recorded within other noncurrent assets within the unaudited condensed consolidated balance sheets. The derivative instruments’ fair value are determined using level 2 inputs from the fair value hierarchy. For the three and six months ended June 30, 2024, the Partnership recorded a gain on interest rate swaps of $0.9 million and $3.5 million, respectively.

10. PARTNERS' CAPITAL AND MEZZANINE CAPITAL

Common Units. An update on the number of common units is as follows for the period from December 31, 2023 to June 30, 2024.


			Common Units
Units, December 31, 2023			10,376,189

Common units issued for SMLP LTIP, net			272,496
Units, June 30, 2024			10,648,685

Series A Preferred Units. As of June 30, 2024, the Partnership had 65,508 Series A Preferred Units outstanding and $39.6 million of accrued and unpaid distributions on its Series A Preferred Units.

Subsidiary Series A Preferred Units. The Partnership records its Subsidiary Series A Preferred Units at fair value upon issuance, net of issuance costs, and subsequently records an effective interest method accretion amount each reporting period to

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accrete the carrying value to a most probable redemption value that is based on a predetermined internal rate of return measure. Net income (loss) attributable to common limited partners includes adjustments for PIK distributions and redemption accretion.

As of June 30, 2024, the Partnership had 93,039 Subsidiary Series A Preferred Units issued and outstanding.

If the Subsidiary Series A Preferred Units were redeemed on June 30, 2024, the redemption amount would be $128.8 million when considering the applicable multiple of invested capital metric and make-whole amount provisions contained in the Amended and Restated Limited Liability Company Agreement of Permian Holdco.

The following table shows the change in the Partnership’s Subsidiary Series A Preferred Unit balance from January 1, 2024 to June 30, 2024, net of $1.4 million and $1.7 million of unamortized issuance costs at June 30, 2024 and December 31, 2023, respectively:


	(In thousands)
Balance at December 31, 2023	$	124,652
Redemption accretion, net of issuance cost amortization	7,636
Cash distribution (includes a $1.6 million distribution payable as of June 30, 2024)	(3,256)
Balance at June 30, 2024	$	129,032

Cash Distribution Policy. The Partnership suspended its cash distributions to holders of its common units and Series A Preferred Units, commencing with respect to the quarter ended March 31, 2020. Upon the resumption of distributions, the Partnership Agreement would have required that it distribute all available cash, subject to reserves established by its General Partner, within 45 days after the end of each quarter to unitholders of record on the applicable record date. The amount of distributions paid under this policy was subject to fluctuations based on the amount of cash the Partnership generated from its business and the decision to make any distribution was determined by the General Partner, taking into consideration the terms of the Partnership Agreement. There were no distributions paid during the three and six months ended June 30, 2024 or during the twelve months ended December 31, 2023. In connection with the consummation of the Corporate Reorganization (as defined herein), the Partnership Agreement was amended to, among other things, reflect that all of the issued and outstanding limited partnership interests of the Partnership are held by Summit Midstream Corporation. For information on the Corporate Reorganization, see Note 16 – Subsequent Events.

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11. EARNINGS PER UNIT

The following table details the components of EPU.


	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
	(In thousands, except per-unit amounts)
Numerator for basic and diluted EPU:
Allocation of net loss among limited partner interests:
Net income (loss)	$	(23,778)	$	(13,540)	$	109,149	$	(27,703)
Less: Net income attributable to Subsidiary Series A Preferred Units	(3,866)		(3,496)		(7,636)		(5,242)
Net income (loss) attributable to Summit Midstream Partners, LP	$	(27,644)	$	(17,036)	$	101,513	$	(32,945)

Less: Net income attributable to Series A Preferred Units	$	(3,313)	$	(2,799)	$	(6,533)	$	(5,438)


Net income (loss) attributable to common limited partners	$	(30,957)	$	(19,835)	$	94,980	$	(38,383)

Denominator for basic and diluted EPU:
Weighted-average common units outstanding – basic	10,649		10,369		10,549		10,291
Effect of nonvested phantom units	—		—		532		—
Weighted-average common units outstanding – diluted	10,649		10,369		11,081		10,291

Net income (loss) per limited partner unit:
Common unit – basic	$	(2.91)	$	(1.91)	$	9.00	$	(3.73)
Common unit – diluted	$	(2.91)	$	(1.91)	$	8.57	$	(3.73)

Nonvested anti-dilutive phantom units excluded from the calculation of diluted EPU	—		217		19		251

12. SUPPLEMENTAL CASH FLOW INFORMATION


	Six Months Ended June 30,
	2024		2023
	(In thousands)
Supplemental cash flow information:
Cash interest paid	$	65,807	$	62,587
Cash paid for taxes	$	15	$	15

Noncash investing and financing activities:
Capital expenditures in trade accounts payable (period-end accruals)	$	8,999	$	8,399
Accretion of Subsidiary Series A Preferred Units, net of issuance cost amortization	$	7,636	$	5,242

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13. UNIT-BASED AND NONCASH COMPENSATION

SMLP Long-Term Incentive Plan. The Partnership’s 2022 Long-Term Incentive Plan (“SMLP LTIP”) provides for equity awards to eligible officers, employees, consultants and directors of the Partnership, thereby linking the recipients’ compensation directly to SMLP’s performance. Significant items to note:

•For the six-month period ended June 30, 2024, the Partnership granted 230,815 time-based phantom units and associated distribution equivalent rights to employees in connection with the Partnership’s annual incentive compensation award cycle. The grant date fair value of these awards totaled $3.7 million and the awards vest ratably over a 3-year period.

•For the six-month period ended June 30, 2024, the Partnership granted 122,867 performance-based phantom units and associated distribution equivalent rights to certain members of management in connection with the Partnership’s annual incentive compensation award cycle. The grant date fair value of these awards totaled $2.4 million and the awards vest at the end of three years.

•For the six-month period ended June 30, 2024, the Partnership issued 39,486 common units to the Partnership’s six independent directors in connection with their annual compensation plan. The grant date fair value of these awards totaled $0.6 million and became fully vested at the grant date.

•On May 16, 2024, the Board of Directors of the Partnership approved the First Amendment to the SMLP LTIP, which increased the number of common units that may be delivered with respect to awards granted under the SMLP LTIP by 750,000 common units. As of June 30, 2024, approximately 0.9 million common units remained available for future issuance under the SMLP LTIP, which includes the impact of 0.7 million granted but unvested phantom units.

14. COMMITMENTS AND CONTINGENCIES

Environmental Matters. Although the Partnership believes that it is in material compliance with applicable environmental regulations, the risk of environmental remediation costs and liabilities are inherent in pipeline ownership and operation. Furthermore, the Partnership can provide no assurances that significant environmental remediation costs and liabilities will not be incurred in the future. The Partnership is currently not aware of any material contingent liabilities that exist with respect to environmental matters, except as noted below.

As of June 30, 2024, the Partnership has recognized (i) a current liability for remediation effort expenditures expected to be incurred within the next 12 months and (ii) a noncurrent liability for estimated remediation expenditures expected to be incurred subsequent to June 30, 2025. Each of these amounts represent the Partnership’s best estimate for costs expected to be incurred. Neither of these amounts have been discounted to their present value.

An update of the Partnership’s undiscounted accrued environmental remediation is as follows and is primarily related to the 2015 Blacktail Release and other environmental remediation activities, as detailed below.


	(In thousands)
Accrued environmental remediation, December 31, 2023	$	2,937
Payments made	(598)
Changes in estimates	623
Accrued environmental remediation, June 30, 2024	$	2,962

In 2015, the Partnership learned of the rupture of a four-inch produced water gathering pipeline on the Meadowlark Midstream system near Williston, North Dakota (“2015 Blacktail Release”). On August 4, 2021, subsidiaries of the Partnership entered into the following agreements to resolve the U.S. federal and North Dakota state governments’ environmental claims with respect to the 2015 Blacktail Release: (i) a Consent Decree with the U.S. Department of Justice (“DOJ”), the U.S. Environmental Protection Agency (“EPA”), and the State of North Dakota (“Consent Decree”); (ii) a Plea Agreement with the United States (“Plea Agreement”); and (iii) a Consent Agreement with the North Dakota Industrial Commission (“Consent Agreement” together with the Consent Decree and Plea Agreement, the “Global Settlement”). As of June 30, 2024 and December 31, 2023, the accrued loss liability for the 2015 Blacktail Release was $21.7 million and are recorded within Other noncurrent liabilities and Accrued settlement payable within the unaudited condensed consolidated balance sheets.

Key terms of the Global Settlement included (i) payment of penalties and fines totaling $36.3 million, consisting of $1.25 million in natural resource damages payable to federal and state governments, $25.0 million payable to the federal government over 5 years, and $10.0 million payable to state governments over, for the federal and state civil amounts, six years and, for the federal criminal amounts, five years, with interest applied to unpaid amounts accruing at, for the federal and state civil amounts, a fixed rate of 3.25% and, for the federal criminal amounts, a variable rate set by statute, and of which

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$6.7 million is expected to be paid within the next twelve months; (ii) continuation of remediation efforts at the site of the 2015 Blacktail Release; (iii) other injunctive relief, including, but not limited to, control room management, environmental management system audit, training, and reporting; (iv) guilty pleas by defendant Summit Midstream Partners, LLC (the “Defendant”) for (a) one charge of negligent discharge of a harmful quantity of oil and (b) one charge of knowing failure to immediately report a discharge of oil; and (v) organizational probation for a minimum period of three years from sentencing on December 6, 2021, including payment in full of certain components of the fines and penalty amounts. The agreements comprising the Global Settlement were subject to the approval of the U.S. District Court for the District of North Dakota (the “U.S. District Court”). The U.S. District Court entered an order making the civil components of the Global Settlement effective on September 28, 2021 and accepted the sentencing in the Plea Agreement on December 6, 2021, completing approval of the Global Settlement.

Subsidiaries of the Partnership are also participating in two proceedings before the EPA as a result of the Plea Agreement becoming effective. Following the U.S. District Court’s entering judgment on Defendant subsidiary’s guilty plea to one count of negligent discharge of produced water in violation of the Clean Water Act, Defendant subsidiary was statutorily debarred by operation of law pursuant to 33 U.S.C. § 1368(a) to participate in federal awards performed at the “violating facility,” which EPA determined to be the Marmon subsystem of the produced water gathering system in North Dakota. The scope and effect of the debarment as defined do not materially affect our operations. Defendant has submitted a petition for reinstatement, which was denied by the EPA’s suspension and debarment office (“SDO”) on July 11, 2022. The SDO determined that the term of probation in the Plea Agreement was the appropriate period of time to demonstrate Defendant subsidiary’s change of corporate attitude, policies, practices, and procedures. The Partnership and certain subsidiaries have also received a show cause notice from the EPA requesting us to “show cause” why SDO should not issue a Notice of Proposed Debarment to the Defendant subsidiary and certain affiliates under 2 C.F.R. § 180.800(d), to which the Partnership has responded, and in which proceeding no further developments have occurred.

Legal Proceedings. The Partnership is involved in various litigation and administrative proceedings arising in the ordinary course of business. In the opinion of management, any liabilities, which include insured claims, would not individually or in the aggregate have a material adverse effect on the Partnership's financial position or results of operations.

15. SEGMENT INFORMATION

As of June 30, 2024, the Partnership’s reportable segments are:

•Rockies – Includes the Partnership’s wholly owned midstream assets located in the Williston Basin and the DJ Basin.

•Permian – Includes the Partnership’s equity method investment in Double E.

•Northeast – Includes the operations of the Partnership’s wholly owned midstream assets located in the Marcellus shale play and its wholly owned midstream assets located in the Utica shale play together with its equity method investment in Ohio Gathering that is focused on the Utica Shale. For additional information regarding the Utica Sale and Mountaineer Transaction, see Note 3 - Divestitures regarding the disposition of Northeast assets.

•Piceance – Includes the Partnership’s wholly owned midstream assets located in the Piceance Basin.

•Barnett – Includes the Partnership’s wholly owned midstream assets located in the Barnett Shale.

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Corporate and Other represents those results that: (i) are not specifically attributable to a reportable segment; (ii) are not individually reportable; or (iii) have not been allocated to our reportable segments, including certain general and administrative expense items, transaction costs, acquisition integration costs and interest expense.

Assets by reportable segment follow.


	June 30, 2024		December 31, 2023
	(In thousands)
Assets:
Rockies	$	905,649	$	904,974
Permian	289,168		291,073
Northeast	2,343		573,663
Piceance	407,191		431,687
Barnett	272,090		281,861
Total reportable segment assets	1,876,441		2,483,258
Corporate and Other	156,497		10,940
Total assets	$	2,032,938	$	2,494,198

Segment adjusted EBITDA by reportable segment follows.


	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
	(In thousands)
Reportable segment adjusted EBITDA(1)
Rockies	$	22,858	$	16,858	$	45,732	$	39,988
Permian	7,697		5,370		14,962		10,443
Northeast	1,613		20,201		30,634		38,055
Piceance	12,848		14,365		28,081		28,348
Barnett	5,420		7,269		10,520		14,296
Total of reportable segments' measures of profit	$	50,436	$	64,063	$	129,929	$	131,130

(1) Segment adjusted EBITDA is a non-GAAP financial measure. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations - Results of Operations” for additional information.

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A reconciliation of income or loss before income taxes and income from equity method investees to total of reportable segments' measures of profit follows.


	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
	(In thousands)
Reconciliation of loss before income taxes and income from equity method investees to total of reportable segments' measures of profit:

Income (loss) before income taxes and income from equity method investees	$	(28,712)	$	(20,722)	$	93,787	$	(40,046)
Add:
Corporate and Other expense	4,391		3,606		11,397		13,069
Interest expense	31,457		35,175		69,303		69,398
Depreciation and amortization (1)	24,152		30,366		52,254		60,425
Proportional adjusted EBITDA for equity method investees (2)	6,842		14,100		27,517		25,738
Adjustments related to capital reimbursement activity	(2,728)		(2,481)		(5,651)		(3,667)
Unit-based and noncash compensation	2,086		1,833		4,858		3,762
(Gain) loss on asset sales, net	34		(75)		7		(143)
(Gain) loss on sale of business	2,192		54		(84,010)		36
Gain on sale of Ohio Gathering	—		—		(126,261)		—
Long-lived asset impairment	20		455		67,936		455
Transaction costs and other	5,738		1,752		13,828		2,103
Early extinguishment of debt	4,964		—		4,964		—
Total of reportable segments' measures of profit	$	50,436	$	64,063	$	129,929	$	131,130

________

(1) Includes the amortization expense associated with our favorable gas gathering contracts as reported in other revenues.

(2) The Partnership records financial results of its investment in Ohio Gathering on a one-month lag and is based on the financial information available to us during the reporting period. With the divestiture of Ohio Gathering in March 2024, proportional adjusted EBITDA includes financial results from December 1, 2023 through March 22, 2024.

16. SUBSEQUENT EVENTS

Corporate Reorganization. On August 1, 2024, following unitholder approval at the Partnership’s Special Meeting of Unitholders on July 18, 2024, the Partnership consummated a previously announced transaction that resulted in the Partnership becoming a wholly owned subsidiary of a newly formed Delaware corporation, Summit Midstream Corporation (the “Corporate Reorganization”). Upon the consummation of the Corporate Reorganization, each outstanding common unit of the Partnership was converted into the right to receive 1.000 shares of common stock of Summit Midstream Corporation and each outstanding Series A Preferred Unit was converted into the right to receive 1.000 shares of Series A Floating Rate Cumulative Redeemable Perpetual Preferred Stock (“Series A Preferred Stock”) of Summit Midstream Corporation, with the liquidation preference of each share of Series A Preferred Stock initially equal to $1,000 and the Certificate of Designation of Series A Floating Rate Cumulative Redeemable Perpetual Preferred Stock of Summit Midstream Corporation (the “Series A Certificate of Designation”) deeming all accumulated and unpaid distributions on the Series A Preferred Units to be Series A Unpaid Cash Dividends (as defined in the Series A Certificate of Designation) per share of Series A Preferred Stock, which constituted all consideration to be paid in respect to such Series A Preferred Units, and any rights to accumulated and unpaid distributions on such Series A Preferred Units were discharged.

Refinancing Transactions.

2029 Notes. On July 26, 2024, Summit Holdings issued $575.0 million aggregate principal amount of 8.625% Senior Secured Second Lien Notes due 2029 (the “2029 Notes”). The 2029 Notes are guaranteed on a senior second-priority basis by Summit Midstream Corporation and certain of Summit Midstream Corporation’s existing and future subsidiaries and are secured on a second-priority basis by substantially the same collateral that is pledged for the benefit of the lenders under the Amended and

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Restated ABL Facility (as defined below). The 2029 Notes mature on October 31, 2029 and have interest payable semi-annually in arrears on each February 15 and August 15, commencing on February 15, 2025.

At any time prior to July 31, 2026, Summit Holdings may on any one or more occasions redeem up to 40% of the aggregate principal amount of the 2029 Notes at a redemption rate of 108.625% of the principal amount plus accrued and unpaid interest, if any, to, but not including, the redemption date, in an amount not greater than the net cash proceeds of one or more equity offerings. At any time before July 31, 2026, Summit Holdings may also redeem the 2029 Notes, in whole or in part, at a price equal to 100% of their principal amount, plus a make-whole premium, together with accrued and unpaid interest to, but not including, the redemption date. Thereafter, Summit Holdings may redeem all or a portion of the 2029 Notes in whole at any time or in part from time to time at the following redemption prices (expressed as percentages of the principal amount) plus accrued and unpaid interest if redeemed during the periods indicated below:


Period	Redemption Price
July 31, 2026 to July 30, 2027	104.313	%
July 31, 2027 to July 30, 2028	102.156	%
July 31, 2028 and thereafter	100.000	%

2026 Secured Notes Tender Offer and Redemption. On July 26, 2024, concurrently with closing the offering of 2029 Notes, Summit Holdings and Finance Corp. consummated a cash tender offer to purchase any and all of the outstanding 2026 Secured Notes (the “2026 Secured Notes Tender Offer”). Summit Holdings and Finance Corp. accepted for payment and made payment for $649.8 million aggregate principal amount of the 2026 Secured Notes validly tendered in the 2026 Secured Notes Tender Offer. On July 26, 2024, concurrently with consummation of the 2026 Secured Notes Tender Offer, Summit Holdings and Finance Corp. delivered notice of redemption to holders of 2026 Secured Notes for the redemption of all $114.7 million aggregate principal amount of 2026 Secured Notes not purchased in the 2026 Secured Notes Tender Offer, at a price equal to 102.125% of the principal amount thereof, plus accrued and unpaid interest to the redemption date (which is expected to be October 15, 2024). On July 26, 2024, concurrently with delivery of notice of redemption, Summit Holdings and Finance Corp. irrevocably deposited $121.2 million in aggregate principal amount of non-callable United States Treasury securities, which includes amounts for principal, interest, and premium with the trustee to satisfy and discharge the 2026 Secured Notes until redeemed on October 15, 2024 with the funds deposited with the trustee.

2025 Senior Notes Redemption. On July 17, 2024, Summit Holdings and Finance Corp. delivered conditional notice of redemption to holders of 2025 Senior Notes for the redemption of all $49.8 million aggregate principal amount of outstanding 2025 Senior Notes, at a price equal to 100.000% of the principal amount thereof, plus accrued and unpaid interest to the redemption date, conditioned on closing of the offering of 2029 Notes. On July 26, 2024, concurrently with closing of the offering of 2029 Notes, Summit Holdings and Finance Corp. irrevocably deposited $50.6 million in aggregate principal amount of non-callable United States Treasury securities, which includes amounts for principal and interest with the trustee to satisfy and discharge the 2025 Senior Notes until redeemed with the funds deposited with the trustee.

Amended and Restated ABL Facility. Concurrently with the issuance of the 2029 Notes, on July 26, 2024, Summit Holdings, as borrower, amended and restated its existing first-lien, senior secured credit agreement, with the Partnership, the subsidiaries party thereto, Bank of America, N.A., as agent, and the several lenders and other agents party thereto, consisting of a $500.0 million asset-based revolving credit facility (the “Amended and Restated ABL Facility”), subject to a borrowing base comprised of a percentage of eligible accounts receivable of Summit Holdings and its subsidiaries that guarantee the Amended and Restated ABL Facility (collectively, the “Amended and Restated ABL Facility Subsidiary Guarantors”) and a percentage of eligible above-ground fixed assets including eligible compression units, processing plants, compression stations and related equipment of Summit Holdings and the Amended and Restated ABL Facility Subsidiary Guarantors.

Summit Holdings amended and restated its existing ABL Facility pursuant to that certain Amended and Restated Loan and Security Agreement (the “New ABL Agreement”), dated as of July 26, 2024.

The Amended and Restated ABL Facility will mature on the earliest of (a) July 26, 2029, (b) July 31, 2029 if either (i) the outstanding amount of the 2029 Notes (or any refinancing debt permitted under the Amended and Restated ABL Facility in respect thereof that has a final maturity date, scheduled amortization or any other scheduled repayment, mandatory prepayment, mandatory redemption or sinking fund obligation prior to the date that is 91 days after the Amended and Restated ABL Termination Date (as defined below) (provided, that the terms of such permitted refinancing debt may (x) require the payment of interest from time to time and (y) include customary mandatory redemptions, prepayments or offers to purchase with proceeds of asset sales or upon the occurrence of a change of control)) on such date equals or exceeds $50.0 million or (ii) the outstanding amount of such debt described in clause (i) above on such date is less than $50.0 million and Liquidity (as defined in the New ABL Agreement) at any time on or after such date is less than the sum of (A) such outstanding amount and (B) the greater of (x) 10% of the aggregate Commitments (as defined in the New ABL Agreement) then in effect and (y) $50.0 million (and, for the avoidance of doubt, once the Amended and Restated ABL Termination Date occurs it may not be unwound as a

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result of Liquidity increasing on a subsequent date), and (c) any date on which the aggregate Commitments terminate thereunder (such date, the “Amended and Restated ABL Termination Date”).

Borrowings under the Amended and Restated ABL Facility will bear interest, at the election of Summit Holdings, at a SOFR-based rate or a base rate, in each case, plus an applicable borrowing margin based on our Total Net Leverage Ratio (as defined in the New ABL Agreement consistent with the ABL Facility). The applicable margin for base rate loans will vary from 1.50% to 2.25% and the applicable margin for SOFR-based loans will vary from 2.50% to 3.25%, in each case, depending on our Total Net Leverage Ratio.

The Amended and Restated ABL Facility (together with certain Secured Bank Product Obligations (as defined in the New ABL Agreement)) will be jointly and severally guaranteed, on a senior first-priority secured basis (subject to permitted liens), by the Partnership, Summit Holdings and each of the Amended and Restated ABL Facility Subsidiary Guarantors.

The Amended and Restated ABL Facility restricts, among other things, Summit Holdings’ and its Restricted Subsidiaries’ (as defined in the New ABL Agreement) ability and the ability of certain of their subsidiaries to: (i) incur additional debt or issue preferred stock; (ii) make distributions or repurchase equity; (iii) make payments on or redeem junior lien, unsecured or subordinated indebtedness; (iv) create liens or other encumbrances; (v) make investments, loans or other guarantees; (vi) engage in transactions with affiliates; and (viii) make acquisitions or merge or consolidate with another entity. These covenants are subject both to a number of important exceptions and qualifications.

The Amended and Restated ABL Facility requires that Summit Holdings not permit (i) the First Lien Net Leverage Ratio (as defined in the New ABL Agreement) as of the last day of any fiscal quarter to be greater than 2.50:1.00, or (ii) the Interest Coverage Ratio (as defined in the New ABL Agreement) as of the last day of any fiscal quarter to be less than 2.00:1.00.

The Amended and Restated ABL Facility contains certain events of default customary for instruments of this type. In the case of an event of default arising from certain events of bankruptcy, insolvency or reorganization with respect to Summit Holdings, all outstanding Obligations (as defined in the New ABL Agreement) will become due and payable immediately without further action or notice and all commitments under the Amended and Restated ABL Facility will terminate.

Pursuant to the New ABL Agreement, the Obligations (as defined in the New ABL Agreement) are (or, subject to post-closing periods for certain types of collateral, will be) generally secured by a first priority lien on and security interest in (subject to permitted liens), subject to certain exclusions and limitations set forth in the New ABL Agreement, (i) substantially all of the personal property of Summit Holdings and the Amended and Restated ABL Facility Subsidiary Guarantors, (ii) all equity interests in Summit Holdings and certain other entities, all debt securities and certain rights related to the foregoing, in each case, owned by the Partnership, (iii) Closing Date Gathering Station Real Property and Closing Date Pipeline Systems Real Property (each, as defined in the New ABL Agreement) and certain other material real property interests (including improvements thereon) of Summit Holdings and the Amended and Restated ABL Facility Subsidiary Guarantors as provided in the New ABL Agreement and (iv) all proceeds of the foregoing collateral.

Intercreditor Agreement. On November 2, 2021, Summit Holdings and the other guarantors party thereto entered into an Intercreditor Agreement (as amended, restated, supplemented or otherwise modified, the “Intercreditor Agreement”) with Bank of America, N.A., as first lien representative and collateral agent for the initial first lien claimholders, and Regions Bank, as initial second lien representative for the initial second lien claimholders and collateral agent for the initial second lien claimholders, which was reaffirmed by Bank of America, N.A., in connection with its entry into the Amended and Restated ABL Facility, and which Regions Bank joined as an additional second lien representative for the additional second lien claimholders and additional second lien collateral agent for the additional second lien claimholders, in each case, substantially concurrently with the entry into the Amended and Restated ABL Facility. The Intercreditor Agreement establishes (i) a first-priority lien (subject to permitted liens) status for the liens on the collateral securing the ABL Facility (and will apply to the Amended and Restated ABL Facility) and any additional first-lien indebtedness and (ii) a junior priority lien (subject to permitted liens) status for the liens on the collateral securing the 2026 Secured Notes and any additional second-lien indebtedness (including the 2029 Notes).

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

This Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) is intended to inform the reader about matters affecting the financial condition and results of operations of the Partnership and its subsidiaries for the periods since December 31, 2023. As a result, the following discussion should be read in conjunction with the unaudited condensed consolidated financial statements and notes thereto included in this report and the MD&A and the audited consolidated financial statements and related notes that are included in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2023 (the “2023 Annual Report”). Among other things, those financial statements and the related notes include more detailed information regarding the basis of presentation for the following information. This discussion contains forward-looking statements that constitute our plans, estimates and beliefs. These forward-looking statements involve numerous risks and uncertainties, including, but not limited to, those discussed in Forward-Looking Statements. Actual results may differ materially from those contained in any forward-looking statements.

Overview

We are a value-driven limited partnership focused on developing, owning and operating midstream energy infrastructure assets that are strategically located in unconventional resource basins, primarily shale formations, in the continental United States.

Our financial results are driven primarily by volume throughput across our gathering systems and by expense management. We generate the majority of our revenues from the gathering, compression, treating and processing services that we provide to our customers. A majority of the volumes that we gather, compress, treat and/or process have a fixed-fee rate structure which enhances the stability of our cash flows by providing a revenue stream that is not subject to direct commodity price risk. We also earn a portion of our revenues from the following activities that directly expose us to fluctuations in commodity prices: (i) the sale of physical natural gas and/or NGLs purchased under percentage-of-proceeds or other processing arrangements with certain of our customers in the Rockies and Piceance segments, (ii) the sale of natural gas we retain from certain Barnett segment customers, (iii) the sale of condensate we retain from our gathering services in the Rockies and Piceance segment and (iv) additional gathering fees that are tied to the performance of certain commodity price indexes which are then added to the fixed gathering rates.

We also have indirect exposure to changes in commodity prices such that persistently low commodity prices may cause our customers to delay and/or cancel drilling and/or completion activities or temporarily shut-in production, which would reduce the volumes of natural gas and crude oil (and associated volumes of produced water) that we gather. If certain of our customers cancel or delay drilling and/or completion activities or temporarily shut-in production, the associated MVCs, if any, ensure that we will earn a minimum amount of revenue.

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The following table presents certain consolidated and reportable segment financial data. For additional information on our reportable segments, see the "Segment Overview for the Three and Six Months Ended June 30, 2024 and 2023" section included herein.


	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
	(In thousands)
Net income (loss)	$	(23,778)	$	(13,540)	$	109,149	$	(27,703)
Reportable segment adjusted EBITDA(1)
Rockies	$	22,858	$	16,858	$	45,732	$	39,988
Permian	7,697		5,370		14,962		10,443
Northeast	1,613		20,201		30,634		38,055
Piceance	12,848		14,365		28,081		28,348
Barnett	5,420		7,269		10,520		14,296

Net cash provided by operating activities	$	(12,643)	$	1,945	$	30,973	$	51,640
Capital expenditures (2)	10,522		15,740		26,920		32,178
Proceeds from Summit Utica Sale (excluding Ohio Gathering)	—		—		292,266		—
Proceeds from sale of Ohio Gathering	—		—		332,734		—
Proceeds from Mountaineer Transaction	70,000		—		70,000		—
Proceeds from asset sale	4,373		128		4,400		128
Investment in Double E equity method investee	442		—		442		3,500
Debt repayments - ABL Facility	—		(24,000)		(313,000)		(37,000)
Debt repayments - Redemption of 2026 Unsecured Notes	(209,510)		—		(209,510)		—
Debt repayments - 2026 Secured Notes (Excess Cash Flow Offer)	(13,626)		—		(13,626)		—
Debt repayments - 2026 Secured Notes (Asset Sale Offer)	(6,910)		—		(6,910)		—
Debt repayments - Permian Transmission Term Loan	(3,827)		(2,601)		(7,621)		(5,120)
Borrowings on ABL Facility	—		35,000		—		35,000

________

(1)Segment adjusted EBITDA is a non-GAAP financial measure. See “Results of Operations” for additional information.

(2)See "Liquidity and Capital Resources" herein to the unaudited condensed consolidated financial statements for additional information on capital expenditures.

Trends and Outlook

Our business has been, and we expect our future business to continue to be, affected by the following key trends:

•Ongoing impact of political and economic conditions and events in foreign oil and natural gas producing countries on commodity prices, including the continued conflict in the Middle East, current Russia-Ukraine conflict, the international sanctions against Russia and other sustained military campaigns;

•Natural gas, NGL and crude oil supply and demand dynamics;

•Actions of the OPEC and its allies, including the ability and willingness of the members of OPEC and other exporting nations to agree to and maintain oil price and production controls;

•Production from U.S. shale plays;

•Capital markets availability and cost of capital; and

•Inflation and shifts in operating costs.

Our expectations are based on assumptions made by us and information currently available to us. To the extent our underlying assumptions about, or interpretations of, available information prove to be incorrect, our actual results may vary materially from our expected results. For additional information, see the "Trends and Outlook" section of MD&A included in the 2023 Annual Report.

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Mountaineer Transaction. On May 1, 2024, we completed the Mountaineer Transaction for a cash sale price of $70.0 million, subject to customary post-closing adjustments. Mountaineer Midstream was the owner of midstream assets located in the Marcellus Shale. Prior to closing the Mountaineer Transaction, we sold related compression assets located in the Marcellus Shale to a compression service provider for approximately $5 million in April 2024.

Summit Utica Sale. As previously announced on March 22, 2024, we completed the Utica Sale for a cash sale price of $625.0 million, subject to customary post-closing adjustments. Summit Utica was the owner of (i) approximately 36% of the issued and outstanding equity interests in OGC, (ii) approximately 38% of the issued and outstanding equity interests in OCC, together with OGC, Ohio Gathering and (iii) midstream assets located in the Utica Shale. Ohio Gathering was the owner of a natural gas gathering system and condensate stabilization facility located in Belmont and Monroe counties in the Utica Shale in southeastern Ohio.

Refinancing Transactions. Subsequent to June 30, 2024, and as described below, the Partnership issued the 2029 Notes and completed the 2026 Secured Notes Tender Offer and subsequent redemption, and the redemption of the 2025 Senior Notes. 2029 Notes. On July 26, 2024, Summit Holdings issued $575.0 million aggregate principal amount of 8.625% Senior Secured Second Lien Notes due 2029 (the “2029 Notes”). The 2029 Notes mature on October 31, 2029 and have interest payable semi-annually in arrears on each February 15 and August 15, commencing on February 15, 2025.

2026 Secured Notes Tender Offer and Redemption. Concurrently with closing the offering of 2029 Notes, Summit Holdings and Finance Corp. consummated a cash tender offer to purchase any and all of the outstanding 2026 Secured Notes (the “2026 Secured Notes Tender Offer”). Summit Holdings and Finance Corp. accepted for payment and made payment for $649.8 million aggregate principal amount of the 2026 Secured Notes validly tendered in the 2026 Notes Tender Offer. On July 26, 2024, concurrently with consummation of the 2026 Secured Notes Tender Offer, Summit Holdings and Finance Corp. delivered notice of redemption to holders of 2026 Secured Notes for the redemption of all $114.7 million aggregate principal amount of 2026 Secured Notes not purchased in the 2026 Secured Notes Tender Offer, at a price equal to 102.125% of the principal amount thereof, plus accrued and unpaid interest to the redemption date (which is expected to be October 15, 2024). On July 26, 2024, concurrently with delivery of notice of redemption, Summit Holdings and Finance Corp. irrevocably deposited $121.2 million in aggregate principal amount of non-callable United States Treasury securities, which includes amounts for principal, interest, and premium with the trustee to satisfy and discharge the 2026 Secured Notes until redeemed on October 15, 2024 with the funds deposited with the trustee.

C-corporation conversion. In connection with the recently concluded strategic alternatives review, we evaluated various corporate structures to determine how to drive the greatest long-term value for unitholders. We believe converting to a C-corporation positions us to maximize value by reducing unitholders’ tax burdens moving forward, enhancing trading liquidity, and expanding the universe of potential investors. On August 1, 2024, the Partnership consummated the Corporate Reorganization, becoming a wholly owned subsidiary of a newly formed Delaware corporation, Summit Midstream Corporation. For additional information, see Note 16 –Subsequent Events.

Conclusion of Strategic Alternatives Review. In connection with the announcement of the Utica Sale, we also announced the conclusion of the strategic alternative review process undertaken by our Board of Directors that was previously announced on October 3, 2023. While we have concluded our active process, we remain open to all potential value-enhancing transactions.

Capital structure optimization and portfolio management. We intend to continue to improve our capital structure in the future by reducing our indebtedness with free cash flow, and when appropriate, we may pursue opportunistic transactions with the objective of increasing long term unitholder value. This may include opportunistic acquisitions, divestitures (such as the Utica Sale in 2024), re-allocation of capital to new or existing areas, and development of joint ventures involving our existing midstream assets or new investment opportunities. We believe that our current cash balance, internally generated cash flow, our ABL Facility, the Permian Credit Facility, and access to debt or equity will be adequate to finance our strategic initiatives. To attain our overall corporate strategic objectives, we may conduct an asset divestiture, or divestitures, at a transaction valuation that is less than the net book value of the divested asset. For additional information, see Note 16 – Subsequent Events.

Ongoing impact of political and economic conditions and events in foreign oil and natural gas producing countries on commodity prices. Although we operate solely in the United States, certain events and conditions in foreign oil and natural gas producing countries, such as the continued conflict in the Middle East, including the Hamas-Israel war and Russia’s invasion of

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Ukraine, could have potential effects on us, including, but not limited to, volatility in currencies and commodity prices, higher inflation, cost and supply chain pressures and availability and disruptions in banking systems and capital markets. As of the date of filing, there have been no material impacts to us.

Based on recently updated production forecasts and 2024 development plans from our customers, we currently expect that 2024 activity will be higher than 2023 and be at an activity level near our historical periods prior to COVID-19.

Impact of increases in interest rates. Increases in interest rates could adversely affect our future ability to obtain financing or materially increase the cost of existing and any additional financing. Since March 2022, the Federal Reserve has raised its target range for the federal funds rate multiple times to a current target range of 5.25% to 5.50%, and the timing of any potential further increases or decreases remains uncertain. As of June 30, 2024, we had approximately $814.2 million principal of fixed-rate debt, nil outstanding under our variable rate ABL Facility and $137.2 million outstanding under the variable rate Permian Transmission Term Loan (see Note 8 - Debt). As of June 30, 2024, we had $123.5 million of interest rate exposure hedged to offset the impact of changes in interest rates on our Permian Transmission Term Loan.

How We Evaluate Our Operations

Prior to the Utica Sale and Mountaineer Transaction, we conducted and reported our operations in the midstream energy industry through five reportable segments: Northeast, Rockies, Permian, Piceance and Barnett. Each of our reportable segments provides midstream services in a specific geographic area and our reportable segments reflect the way in which we internally report the financial information used to make decisions and allocate resources in connection with our operations. For additional information see Note 15 - Segment Information.

Our management uses a variety of financial and operational metrics to analyze our consolidated and segment performance. We view these metrics as important factors in evaluating our profitability. These metrics include:

•throughput volume;

•revenues;

•operation and maintenance expenses;

•capital expenditures; and

•segment adjusted EBITDA.

We review these metrics on a regular basis for consistency and trend analysis. There have been no changes in the composition or characteristics of these metrics during the three and six months ended June 30, 2024.

Additional Information. For additional information, see the "Results of Operations" section herein and the notes to the unaudited condensed consolidated financial statements. For additional information on how these metrics help us manage our business, see the "How We Evaluate Our Operations" section of MD&A included in the 2023 Annual Report. For information on impending accounting changes that are expected to materially impact our financial results reported in future periods, see Note 2 – Summary of Significant Accounting Policies and Recently Issued Accounting Standards Applicable to the Partnership.

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Results of Operations

Consolidated Overview for the Three and Six Months Ended June 30, 2024 and 2023

The following table presents certain consolidated financial and operating data.


	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
	(In thousands)
Revenues:
Gathering services and related fees	$	45,213	$	57,086	$	107,198	$	114,457
Natural gas, NGLs and condensate sales	47,959		36,082		97,051		85,245
Other revenues	8,143		4,725		15,937		10,690
Total revenues	101,315		97,893		220,186		210,392
Costs and expenses:
Cost of natural gas and NGLs	29,619		19,975		59,801		50,857
Operation and maintenance	23,440		25,158		48,452		49,130
General and administrative	14,164		10,812		28,949		20,799
Depreciation and amortization	23,917		30,132		51,784		59,956
Transaction costs	3,271		480		11,062		782
Acquisition integration costs	—		723		40		2,225
(Gain) loss on asset sales, net	34		(75)		7		(143)
Long-lived asset impairment	20		455		67,936		455
Total costs and expenses	94,465		87,660		268,031		184,061
Other income (expense), net	2,131		1,006		2,118		1,062
Gain on interest rate swaps	920		3,268		3,510		1,995
Gain (loss) on sale of business	(2,192)		(54)		84,010		(36)
Gain on sale of Ohio Gathering	—		—		126,261		—
Interest expense	(31,457)		(35,175)		(69,303)		(69,398)
Loss on early extinguishment of debt	(4,964)		—		(4,964)		—
Income (loss) before income taxes and equity method investment income	(28,712)		(20,722)		93,787		(40,046)
Income tax benefit	654		—		444		252
Income from equity method investees	4,280		7,182		14,918		12,091
Net income (loss)	$	(23,778)	$	(13,540)	$	109,149	$	(27,703)

Volume throughput (1):
Aggregate average daily throughput - natural gas (MMcf/d)	716		1,207		1,023		1,197
Aggregate average daily throughput - liquids (Mbbl/d)	75		71		75		73

________

(1)Excludes volume throughput for Ohio Gathering and Double E. For additional information, see the Northeast and Permian sections herein under the caption “Segment Overview for the Three and Six Months Ended June 30, 2024 and 2023”.

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Volumes – Gas. Natural gas throughput volumes decreased 491 MMcf/d for the three months ended June 30, 2024 compared to the three months ended June 30, 2023, primarily reflecting:

•a volume throughput decrease of 534 MMcf/d for the Northeast segment.

•a volume throughput increase of 31 MMcf/d for the Rockies segment.

•a volume throughput decrease of 8 MMcf/d for the Piceance segment.

•a volume throughput increase of 20 MMcf/d for the Barnett segment.

Natural gas throughput volumes decreased 174 MMcf/d for the six months ended June 30, 2024 compared to the six months ended June 30, 2023, primarily reflecting:

•a volume throughput decrease of 206 MMcf/d for the Northeast segment.

•a volume throughput increase of 9 MMcf/d for the Piceance segment.

•a volume throughput increase of 23 MMcf/d for the Rockies segment.

Volumes – Liquids. Crude oil and produced water throughput volumes at the Rockies segment increased for the three months ended June 30, 2024, compared to the three months ended June 30, 2023, primarily as a result of 56 new well connections that came online subsequent to June 30, 2023, offset by natural production declines.

Crude oil and produced water throughput volumes at the Rockies segment increased for the six months ended June 30, 2024, compared to the six months ended June 30, 2023, primarily as a result of 56 new well connections that came online subsequent to June 30, 2023, offset by natural production declines.

For additional information on volumes, see the "Segment Overview for the Three and Six Months Ended June 30, 2024 and 2023" section herein.

Revenues. Total revenues increased $3.4 million during the three months ended June 30, 2024 compared to the three months ended June 30, 2023, comprised of an $11.9 million increase in natural gas, NGLs and condensate sales, a $3.4 million increase in other revenue; offset by an $11.9 million decrease in gathering services and related fees.

Gathering Services and Related Fees. Gathering services and related fees decreased $11.9 million compared to the three months ended June 30, 2023, primarily reflecting:

•a $1.4 million increase in the Rockies, primarily due to increased volume throughput;

•a $10.8 million decrease in the Northeast, primarily due to the sale of the Mountaineer Midstream system and the disposition of Summit Utica;

•a $2.0 million decrease in the Piceance, primarily due to decreased volume throughput and contractual step-downs;

•a $0.5 million decrease in the Barnett, primarily due to decreased volume throughput.

Natural Gas, NGLs and Condensate Sales. Natural gas, NGLs and condensate revenues increased $11.9 million compared to the three months ended June 30, 2023, primarily reflecting:

•a $0.7 million decrease in the Piceance, primarily due to decreased volume throughput;

•a $12.6 million increase in the Rockies, primarily due to increased volume throughput.

Total revenues increased $9.8 million during the six months ended June 30, 2024 compared to the six months ended June 30, 2023, comprised of a $7.3 million decrease in gathering services and related fees, offset by a $5.2 million increase in other revenue and an $11.8 million increase in natural gas, NGLs and condensate sales.

Gathering Services and Related Fees. Gathering services and related fees decreased $7.3 million compared to the six months ended June 30, 2023, primarily reflecting:

•a $2.6 million increase in the Rockies, primarily due to increased volume throughput;

•a $6.7 million decrease in the Northeast, primarily due to the sale of the Mountaineer Midstream system and the disposition of Summit Utica;

•a $2.5 million decrease in the Barnett, primarily due to decreased volume throughput;

•a $0.7 million decrease in the Piceance, primarily due to contractual step-downs; offset by increased volume throughput.

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Natural Gas, NGLs and Condensate Sales. Natural gas, NGLs and condensate revenues increased $11.8 million compared to the six months ended June 30, 2023, primarily reflecting:

•a $1.4 million decrease in the Piceance; primarily due to lower commodity prices; partially offset by increased volume throughput;

•a $13.3 million increase in the Rockies, primarily due to increased volume throughput.

Costs and Expenses. Total costs and expenses increased $6.8 million during the three months ended June 30, 2024 compared to the three months ended June 30, 2023.

Total costs and expenses increased $84.0 million during the six months ended June 30, 2024 compared to the six months ended June 30, 2023.

Cost of Natural Gas and NGLs. Cost of natural gas and NGLs increased $9.6 million for the three months ended June 30, 2024, compared to the three months ended June 30, 2023.

Cost of natural gas and NGLs increased $8.9 million for the six months ended June 30, 2024, compared to the six months ended June 30, 2023.

Operation and Maintenance. Operation and maintenance expense decreased $1.7 million for the three months ended June 30, 2024, compared to the three months ended June 30, 2023.

Operation and maintenance expense decreased $0.7 million for the six months ended June 30, 2024, compared to the six months ended June 30, 2023.

Long-lived asset impairments. During the quarterly period ended March 31, 2024, we recognized an impairment charge of $67.9 million in connection with the Mountaineer Transaction.

Interest Expense. Interest expense decreased $3.7 million for the three months ended June 30, 2024, compared to three months ended June 30, 2023, primarily due to $7.3 million of reduced interest expense in connection with the repayment of the ABL Facility and $3.0 of reduced interest expense as a result of the exchange and repurchase of $209.7 million of the 2025 Senior Notes that occurred in November 2023, partially offset by $5.7 million of increased borrowing costs on the 2026 Unsecured Notes issued in November 2023.

Interest expense decreased $0.1 million for the six months ended June 30, 2024, compared to six months ended June 30, 2023, primarily due to $7.8 million of reduced interest expense in connection with the repayment of the ABL Facility and $6.0 of reduced interest expense as a result of the exchange and repurchase of $209.7 million of the 2025 Senior Notes that occurred in November 2023, partially offset by $12.0 million of increased borrowing costs on the 2026 Unsecured Notes issued in November 2023.

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Segment Overview for the Three and Six Months Ended June 30, 2024 and 2023

Northeast.

Volume throughput for the Northeast reportable segment follows.


	Northeast
	Three Months Ended June 30,			Six Months Ended June 30,
	2024	2023	Percentage Change	2024	2023	Percentage Change
Average daily throughput (MMcf/d)	95	629	*	404	610	*
Average daily throughput (MMcf/d) (Ohio Gathering)	—	781	*	425	709	*

* Not considered meaningful

On March 22, 2024, we completed the disposition of Summit Utica, the owner of our equity method investment, Ohio Gathering, and on May 1, 2024, we completed the disposition of our Mountaineer Midstream system.

Volume throughput for the Northeast, excluding Ohio Gathering, decreased for the three and six months ended June 30, 2024, compared to the three and six months ended June 30, 2023, primarily due to the sale of our Mountaineer Midstream system and the disposition of Summit Utica as discussed above.

Volume throughput for the Ohio Gathering system decreased for the three and six months ended June 30, 2024, compared to the three and six months ended June 30, 2023, primarily due to the disposition of Summit Utica, which owns an interest in the Ohio Gathering system.

Financial data for our Northeast reportable segment follows.


	Northeast
	Three Months Ended June 30,					Six Months Ended June 30,
	2024		2023		Percentage Change	2024		2023		Percentage Change
	(In thousands)					(In thousands)
Revenues:
Gathering services and related fees	$	1,998	$	12,805	(84)%	$	18,851	$	25,560	(26)%
Total revenues	1,998		12,805		(84)%	18,851		25,560		(26)%
Costs and expenses:
Operation and maintenance	366		2,025		(82%)	2,259		4,110		(45%)
General and administrative	19		192		(90%)	220		402		(45%)
Depreciation and amortization	—		4,431		(100)%	4,248		8,884		(52)%
Gain on asset sales, net	(21)		(7)		200%	(21)		(7)		200%
Long-lived asset impairment	—		—		*	67,916		—		*
Total costs and expenses	364		6,641		(95%)	74,622		13,389		*
Add:
Depreciation and amortization	—		4,431			4,248		8,884
Adjustments related to capital reimbursement activity	20		(21)			—		(41)
Gain on asset sales, net	(21)		(7)			(21)		(7)
Long-lived asset impairment	—		—			67,916		—
Proportional adjusted EBITDA for Ohio Gathering (1)	—		9,505		(100)%	14,282		16,919		(16)%
Other	(20)		129			(20)		129
Segment adjusted EBITDA (2)	$	1,613	$	20,201	(92)%	$	30,634	$	38,055	(20)%

* Not considered meaningful

(1)The Partnership recorded its financial results of its investment in Ohio Gathering on a one-month lag based on financial information available to us during the reporting period. With the divestiture of Ohio Gathering in March 2024, proportional adjusted EBITDA includes financial results from December 1, 2023 through March 22, 2024 ($2.5 million for March 1, 2024 - March 22, 2024).

(2)Segment adjusted EBITDA is a non-GAAP financial measure.

Three and six months ended June 30, 2024. Segment adjusted EBITDA decreased $18.6 million and $7.4 million, compared to the three and six months ended June 30, 2023, respectively, primarily as the result of the sale of our Mountaineer Midstream system and the disposition of Summit Utica.

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Rockies.

Volume throughput for our Rockies reportable segment follows.


	Rockies
	Three Months Ended June 30,			Six Months Ended June 30,
	2024	2023	Percentage Change	2024	2023	Percentage Change
Aggregate average daily throughput - natural gas (MMcf/d)	130	99	31%	127	104	22%
Aggregate average daily throughput - liquids (Mbbl/d)	75	71	6%	75	73	3%

Natural gas. Natural gas volume throughput increased for the three and six months ended June 30, 2024, compared to the three and six months ended June 30, 2023, primarily reflecting 100 new well connections that came online subsequent to June 30, 2023, partially offset by winter related interruptions which occurred during the first quarter of 2024.

For the three months ended June 30, 2024 and 2023, costs of natural gas and NGLs includes $11.4 million and $9.6 million, respectively, of gathering fees collected under percentage of proceeds arrangements.

For the six months ended June 30, 2024 and 2023, costs of natural gas and NGLs includes $22.6 million and $20.5 million, respectively, of gathering fees collected under percentage of proceeds arrangements.

Liquids. Liquids volume throughput increased for the three and six months ended June 30, 2024, compared to the three and six months ended June 30, 2023, primarily associated with 56 new well connections that came online subsequent to June 30, 2023 offset by natural production declines.

Financial data for our Rockies reportable segment follows.


	Rockies
	Three Months Ended June 30,					Six Months Ended June 30,
	2024		2023		Percentage Change	2024		2023		Percentage Change
	(In thousands)					(In thousands)
Revenues:
Gathering services and related fees	$	16,323	$	14,909	9%	$	32,839	$	30,212	9%
Natural gas, NGLs and condensate sales	47,214		34,575		37%	95,184		81,904		16%
Other revenues	3,321		725		358%	7,429		3,344		122%
Total revenues	66,858		50,209		33%	135,452		115,460		17%
Costs and expenses:
Cost of natural gas and NGLs	29,302		19,476		50%	59,110		49,284		20%
Operation and maintenance	12,059		12,176		(1%)	25,071		24,245		3%
General and administrative	1,051		1,068		(2%)	2,482		1,741		43%
Depreciation and amortization	9,090		8,635		5%	18,035		17,013		6%
Integration costs	—		51		(100%)	—		462		(100%)
(Gain) loss on asset sales, net	55		(54)		(202%)	36		(111)		(132%)
Long-lived asset impairment	20		455		(96%)	20		455		(96%)
Total costs and expenses	51,577		41,807		23%	104,754		93,089		13%
Add:
Depreciation and amortization	9,090		8,635			18,035		17,013
Integration costs	—		51			—		462
Adjustments related to capital reimbursement activity	(1,588)		(875)			(3,057)		(471)
(Gain) loss on asset sales, net	55		(54)			36		(111)
Long-lived asset impairment	20		455			20		455
Other	—		244			—		269
Segment adjusted EBITDA (1)	$	22,858	$	16,858	36%	$	45,732	$	39,988	14%

* Not considered meaningful

(1) Segment adjusted EBITDA is a non-GAAP financial measure.

Three and six months ended June 30, 2024. Segment adjusted EBITDA increased $6.0 million and $5.7 million, compared to the three and six months ended June 30, 2023, respectively, primarily as a result of increased throughput as described above.

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Permian.

Volume throughput for our Permian reportable segment follows.


	Permian
	Three Months Ended June 30,			Six Months Ended June 30,
	2024	2023	Percentage Change	2024	2023	Percentage Change
Average daily throughput (MMcf/d) (Double E)	549	243	126%	508	254	100%

Volume throughput for Double E increased for the three and six months ended June 30, 2024, compared to the three and six months ended June 30, 2023.

The following table presents the MVC quantities that Double E’s shippers have contracted to with firm transportation service agreements and related negotiated rate agreements:


(Amounts in MMBTU/day)			Weighted average MVC quantities for the year ended December 31,


2024			1,008,587
2025			1,068,630
2026			1,115,000
2027			1,115,000
2028			1,115,000
2029			1,115,000
2030			1,115,000
2031			1,009,521
2032			240,000
2033			240,000
2034			105,753
2035			9,863

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Financial data for our Permian reportable segment follows.


	Permian
	Three Months Ended June 30,					Six Months Ended June 30,
	2024		2023		Percentage Change	2024		2023		Percentage Change
	(In thousands)					(In thousands)
Revenues:
Other revenues	$	911	$	892	2%	$	1,821	$	1,785	2%
Total revenues	911		892		2%	1,821		1,785		2%
Costs and expenses:
General and administrative	57		116		(51)%	93		160		(42)%
Transaction costs	—		75		*	—		75		*
Total costs and expenses	57		191		(70)%	93		235		(60)%
Add:
Transaction costs	—		75			—		75
Proportional adjusted EBITDA for Double E	6,843		4,594		49%	13,234		8,818		50%
Segment adjusted EBITDA (1)	$	7,697	$	5,370	43%	$	14,962	$	10,443	43%

*Not considered meaningful

(1) Segment adjusted EBITDA is a non-GAAP financial measure.

Three and six months ended June 30, 2024. Segment adjusted EBITDA increased $2.3 million and $4.5 million, compared to the three and six months ended June 30, 2023, primarily as a result of an increase in proportional adjusted EBITDA from our equity method investment in Double E.

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Piceance.

Volume throughput for our Piceance reportable segment follows.


	Piceance
	Three Months Ended June 30,			Six Months Ended June 30,
	2024	2023	Percentage Change	2024	2023	Percentage Change
Aggregate average daily throughput (MMcf/d)	289	297	(3%)	301	292	3%

Volume throughput decreased for the three months ended June 30, 2024, compared to the three months ended June 30, 2023, primarily as a result of natural production declines, offset by 33 new well connections that came online subsequent to June 30, 2023.

Volume throughput increased for the six months ended June 30, 2024, compared to the six months ended June 30, 2023, primarily as a result of 33 new well connections that came online subsequent to June 30, 2023, partially offset by natural production declines.

Financial data for our Piceance reportable segment follows.


	Piceance
	Three Months Ended June 30,					Six Months Ended June 30,
	2024		2023		Percentage Change	2024		2023		Percentage Change
	(In thousands)					(In thousands)
Revenues:
Gathering services and related fees	$	18,063	$	20,014	(10%)	$	38,450	$	39,133	(2%)
Natural gas, NGLs and condensate sales	666		1,335		(50)%	1,614		2,976		(46)%
Other revenues	1,234		1,373		(10)%	2,479		2,799		(11)%
Total revenues	19,963		22,722		(12%)	42,543		44,908		(5%)
Costs and expenses:
Cost of natural gas and NGLs	302		499		(39)%	676		1,573		(57)%
Operation and maintenance	5,752		6,427		(11)%	11,424		12,176		(6)%
General and administrative	307		279		10%	613		518		18%
Depreciation and amortization	10,529		12,898		(18%)	20,997		25,779		(19%)
Gain on asset sales, net	—		—		*	(8)		(4)		100%

Total costs and expenses	16,890		20,103		(16)%	33,702		40,042		(16)%
Add:
Depreciation and amortization	10,529		12,898			20,997		25,779

Adjustments related to capital reimbursement activity	(808)		(1,258)			(1,913)		(2,503)
Gain on asset sales, net	—		—			(8)		(4)

Other	54		106			164		210
Segment adjusted EBITDA (1)	$	12,848	$	14,365	(11%)	$	28,081	$	28,348	(1%)

________

*Not considered meaningful

(1) Segment adjusted EBITDA is a non-GAAP financial measure.

Three and six months ended June 30, 2024. Segment adjusted EBITDA decreased $1.5 million and $0.3 million, compared to the three and six months ended June 30, 2023 primarily related to the contractual step-downs.

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Barnett.

Volume throughput for our Barnett reportable segment follows.


	Barnett
	Three Months Ended June 30,			Six Months Ended June 30,
	2024	2023	Percentage Change	2024	2023	Percentage Change
Average daily throughput (MMcf/d)	202	182	11%	191	191	—%

Volume throughput continues to be impacted by temporary production curtailments associated with reductions in commodity pricing.

Financial data for our Barnett reportable segment follows.


	Barnett
	Three Months Ended June 30,					Six Months Ended June 30,
	2024		2023		Percentage Change	2024		2023		Percentage Change
	(In thousands)					(In thousands)
Revenues:
Gathering services and related fees	$	8,829	$	9,358	(6%)	$	17,058	$	19,552	(13%)
Natural gas, NGLs and condensate sales	79		172		(54%)	253		365		(31%)
Other revenues (1)	2,026		1,736		17%	3,483		2,800		24%
Total revenues	10,934		11,266		(3%)	20,794		22,717		(8%)
Costs and expenses:
Operation and maintenance	5,060		4,561		11%	9,436		8,630		9%
General and administrative	355		328		8%	646		593		9%
Depreciation and amortization	3,820		3,798		1%	7,640		7,603		—%
Gain on asset sales, net	—		(14)		(100%)	—		(14)		(100%)

Total costs and expenses	9,235		8,673		6%	17,722		16,812		5%
Add:
Depreciation and amortization	4,054		4,033			8,109		8,072
Adjustments related to capital reimbursement activity	(333)		(328)			(661)		(652)
Gain on asset sales, net	—		(14)			—		(14)

Other	—		985			—		985
Segment adjusted EBITDA (2)	$	5,420	$	7,269	(25)%	$	10,520	$	14,296	(26)%

________

*Not considered meaningful

(1) Includes the amortization expense associated with our favorable gas gathering contracts as reported in Other revenues.

(2) Segment adjusted EBITDA is a non-GAAP financial measure.

Three and six months ended June 30, 2024. Segment adjusted EBITDA decreased $1.8 million and $3.8 million, compared to the three and six months ended June 30, 2023, respectively, primarily as a result of a decrease in gas gathering services revenue.

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Corporate and Other Overview for the Three and Six Months Ended June 30, 2024 and 2023

Corporate and Other represents those results that are not specifically attributable to a reportable segment or that have not been allocated to our reportable segments, including certain general and administrative expense items, transaction costs, acquisition integration costs and interest expense. Corporate and Other includes intercompany eliminations.


	Corporate and Other
	Three Months Ended June 30,					Six Months Ended June 30,
	2024		2023		Percentage Change	2024		2023		Percentage Change
	(In thousands)					(In thousands)


Costs and expenses:

General and administrative	$	12,375	$	8,829	40%	$	24,895	$	17,385	43%
Transaction costs	3,271		405		*	11,062		707		*
Interest expense	31,457		35,175		(11)%	69,303		69,398		—%

________

* Not considered meaningful

General and administrative. General and administrative expenses increased by $3.5 million and $7.5 million for the three and six months ended June 30, 2024, compared to the three months ended June 30, 2023, respectively, primarily due to increased employee salaries and benefit expense, as well as professional and other expenses associated with our Corporate Reorganization.

Transaction costs. Transaction costs in 2024 are primarily related to the Utica Sale that closed on March 22, 2024, the Mountaineer Transaction that closed on May 1, 2024 and the costs incurred in connection with our Corporate Reorganization and strategic alternatives review .

Interest expense. Interest expense decreased $3.7 million for the three months ended June 30, 2024, compared to three months ended June 30, 2023, primarily due to $7.3 million of reduced interest expense in connection with the repayment of the ABL Facility and $3.0 of reduced interest expense as a result of the exchange and repurchase of $209.7 million of the 2025 Senior Notes that occurred in November 2023, partially offset by $5.7 million of increased borrowing costs on the 2026 Unsecured Notes issued in November 2023.

Liquidity and Capital Resources

We rely primarily on internally generated cash flows as well as current cash balance and external financing sources, including commercial bank borrowings, and the issuance of debt, equity and preferred equity securities, and proceeds from potential asset divestitures to fund our capital expenditures. We believe that our ABL Facility and Permian Transmission Credit Facility, together with internally generated cash flows, current cash balance and access to debt or equity capital markets, will be adequate to finance our operations for the next twelve months without adversely impacting our liquidity.

We may enter into off-balance sheet arrangements and transactions that can give rise to material off-balance sheet obligations. As of June 30, 2024, our material off-balance sheet arrangements and transactions include (i) letters of credit outstanding against our ABL Facility aggregating to $4.3 million, and (ii) letters of credit outstanding against our Permian Transmission Credit Facility aggregating to $10.5 million. There are no other transactions, arrangements or other relationships with unconsolidated entities or other persons that are reasonably likely to materially affect our liquidity or availability of our capital resources.

We are in compliance with all covenants contained in the Senior Notes, the ABL Facility and the Permian Transmission Credit Facility. The ABL Facility requires that Summit Holdings not permit (i) the First Lien Net Leverage Ratio (as defined in the ABL Agreement) as of the last day of any fiscal quarter to be greater than 2.50:1.00, or (ii) the Interest Coverage Ratio (as defined in the ABL Agreement) for any fiscal quarter ending on or before December 31, 2024, (x) if no loans under the Credit Agreement are outstanding and unrestricted cash exceeds $200.0 million on such date, 1.50:1.00 and (y) if any loans under the Credit Agreement are outstanding or unrestricted cash is less than such threshold on such date, 1.75:1.00 and (b) thereafter, 1.90:1.00.

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ABL Facility. As of June 30, 2024, we had a $400.0 million revolving ABL Facility with a maturity date of May 1, 2026; provided that if the outstanding amount of the 2025 Senior Notes (or any permitted refinancing indebtedness in respect thereof that has a final maturity, scheduled amortization or any other scheduled repayment, mandatory prepayment, mandatory redemption or sinking fund obligation prior to the date that is 120 days after the Termination Date (as defined in the ABL Agreement)) on such date equals or exceeds $50.0 million, then the ABL Facility will mature on December 13, 2024. As of June 30, 2024, there were no amounts outstanding under the ABL Facility and the available borrowing capacity totaled $371.7 million after giving effect to the issuance thereunder of $4.3 million of outstanding but undrawn irrevocable standby letters of credit and $24.0 million of commitment reserves. For additional information on our refinancing transactions, see Note 16.

2025 Senior Notes. In February 2017, the Co-Issuers co-issued $500.0 million of 5.75% senior unsecured notes maturing April 15, 2025 (the “2025 Senior Notes”). As of June 30, 2024, the outstanding balance of the 2025 Senior Notes was $49.8 million. The 2025 Senior Notes were senior, unsecured obligations and ranked equally in right of payment with all of our existing and future senior obligations. The 2025 Senior Notes were effectively subordinated in right of payment to all of our secured indebtedness, to the extent of the collateral securing such indebtedness. As of June 30, 2024, the Co-Issuers could have redeemed all or part of the 2025 Senior Notes at a redemption price of 100.000%, plus accrued and unpaid interest, if any, to, but not including the redemption date. For additional information on our refinancing transactions, see Note 16.

2026 Secured Notes. In November 2021, we issued $700.0 million of the 2026 Secured Notes, at a price of 98.5% of face value. Additionally, in November 2022, we issued an additional $85.0 million of 2026 Secured Notes at a price of 99.26% of their face value. The Co-Issuers paid interest on the 2026 Secured Notes semi-annually on April 15 and October 15 of each year, and the 2026 Secured Notes were jointly and severally guaranteed, on a senior second-priority secured basis (subject to permitted liens), by us and each of our restricted subsidiaries that is an obligor under the ABL Facility, or under the 2025 Senior Notes on the issue date of the 2026 Secured Notes. As of June 30, 2024, the outstanding balance of the 2026 Secured Notes was $764.5 million.

The 2026 Secured Notes would have matured on October 15, 2026; provided that, if the outstanding amount of the 2025 Senior Notes (or any refinancing indebtedness in respect thereof that has a final maturity on or prior to the date that is 91 days after the Initial Maturity Date (as defined in the 2026 Secured Notes Indenture)) is greater than or equal to $50.0 million on January 14, 2025, which is 91 days prior to the scheduled maturity date of the 2025 Senior Notes, then the 2026 Secured Notes would have matured on January 14, 2025.

Starting in the first quarter of 2023 with respect to the fiscal year ended 2022, and continuing annually through the fiscal year ended 2025, we were required under the terms of the 2026 Secured Notes Indenture to, if we have Excess Cash Flow (as defined in the 2026 Secured Notes Indenture), and subject to our ability to make such an offer under the ABL Facility, offer to purchase an amount of the 2026 Secured Notes, at 100% of the principal amount plus accrued and unpaid interest, equal to 100% of the Excess Cash Flow generated in the prior year. Excess Cash Flow is generally defined as consolidated cash flow minus the sum of capital expenditures and cash payments in respect of permitted investments and permitted restricted payments.

Generally, if we did not offer to purchase designated annual amounts of its 2026 Secured Notes or reduce its first lien capacity under the 2026 Secured Notes Indenture per annum from 2023 through 2025, the interest rate on the 2026 Secured Notes is subject to certain rate escalations. Per the terms of the 2026 Secured Notes Indenture, the designated amounts are $50.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2023, otherwise the interest rate shall automatically increase by 50 basis points per annum; $100.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2024, otherwise the interest rate shall automatically increase by 100 basis points per annum (minus any amount previously increased); and $200.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2025, otherwise the interest rate shall automatically increase by 200 basis points per annum (minus any amount previously increased).

Based on the amount of our Excess Cash Flow for the fiscal year ended 2023, on March 27, 2024, we commenced a cash tender offer to purchase up to $19.3 million aggregate principal amount of the outstanding 2026 Secured Notes at 100% of the principal amount plus accrued and unpaid interest. The cash flow offer expired on April 24, 2024 with $13.6 million tendered and validly accepted and fully discharged as of June 30, 2024.

As of April 1, 2024, we had not made offers to purchase in the required amount of $100.0 million and the interest rate on the 2026 Secured Notes increased an incremental 50 basis points to 9.50% effective on such date.

On May 7, 2024, we commenced a cash tender offer to purchase up to $215.0 million of the outstanding 2026 Secured Notes (the “Asset Sale Offer”). The Asset Sale Offer expired on June 5, 2024 with $6.9 million of the 2026 Secured Notes validly tendered and fully discharged as of June 30, 2024.

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To the extent we made an offer to purchase, and the offer was not fully accepted by the holders of the 2026 Secured Notes, we could have used any remaining amount not accepted for any purpose not prohibited by the 2026 Secured Notes Indenture or the ABL Facility.

For additional information on our refinancing transactions, see Note 16.

2026 Unsecured Notes. In November 2023, we issued a total of $209.5 million aggregate principal amount of 2026 Unsecured Notes in exchange for $180.0 million aggregate principal amount of the 2025 Senior Notes and $29.5 million in cash. The 2026 Unsecured Notes bore interest at 12.00% and would have matured on October 15, 2026, in line with the maturity date of the 2026 Secured Notes. On June 7, 2024, the Co-Issuers, delivered a redemption notice with respect to all $209.5 million of the outstanding 2026 Unsecured Notes at 101.000%. On June 24, 2024, the 2026 Unsecured Notes were fully repaid and discharged. As of June 30, 2024, the 2026 Unsecured Notes were redeemed in full and satisfied and discharged.

Other. We may in the future use a combination of cash, secured or unsecured borrowings and issuances of our common units or other securities and the proceeds from asset sales to retire or refinance our outstanding debt or Series A Preferred Units through privately negotiated transactions, open market repurchases, redemptions, exchange offers, tender offers or otherwise, but we are under no obligation to do so. Any such transactions occurring prior to the August 1, 2024 Corporate Reorganization may produce allocations of taxable income to a unitholder with respect to such time period, such as gains on asset sales or income from cancellation of indebtedness, that would be large on a per-unit basis relative to the then trading price of our common units and were not, and will not be, accompanied by any corresponding distribution of cash to fund the payment of the resulting tax liability to the unitholder.

Cash Flows

The components of the net change in cash and cash equivalents were as follows:


	Six Months Ended June 30,
	2024		2023
	(In thousands)
Net cash provided by operating activities	$	30,973	$	51,640
Net cash provided by (used in) investing activities	672,038		(38,217)
Net cash used in financing activities	(559,440)		(12,077)
Net change in cash, cash equivalents and restricted cash	$	143,571	$	1,346

Operating activities.

Cash flows provided by operating activities for the six months ended June 30, 2024 primarily reflected:

•a net income of $109.1 million plus positive adjustments of $66.3 million for non-cash operating items; and

•a $11.9 million change in working capital accounts.

Cash flows provided by operating activities for the six months ended June 30, 2023 primarily reflected:

•a net loss of $27.7 million plus adjustments of $85.9 million for non-cash operating items; and

•a $6.5 million change in working capital accounts.

Investing activities.

Cash flows provided by investing activities during the six months ended June 30, 2024 primarily reflected:

•$332.7 million of cash inflows from the proceeds of the sale Ohio Gathering;

•$292.3 million of cash inflows from the proceeds of the Utica Sale (excluding Ohio Gathering);

•$70.0 million of cash inflows from the proceeds of the Mountaineer Transaction;

•$4.4 million of cash inflows from the sale of compressor equipment; and

•$26.9 million of cash outflows for capital expenditures.

Cash flows used in investing activities during the six months ended June 30, 2023 primarily reflected:

•$32.2 million of cash outflows for capital expenditures; and

•$3.5 million for cash investments in the Double E Project.

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Financing activities.

Cash flows used in financing activities during the six months ended June 30, 2024 primarily reflected:

•$313.0 million of cash outflows for repayments on the ABL Facility;

•$209.5 million of cash outflows from the redemption of 2026 Unsecured Notes;

•$13.6 million of cash outflows for the Excess Cash Flow Offer;

•$7.6 million of cash outflows for repayments on the Permian Transmission Term Loan; and

•$6.9 million of cash outflows for the Asset Sale Offer.

Cash flows used in financing activities during the six months ended June 30, 2023 primarily reflected:

•$37.0 million of cash outflows for repayments on the ABL Facility;

•$5.1 million of cash outflows for repayments on the Permian Transmission Term Loan; offset by

•$35.0 million from borrowings on the ABL Facility.

Capital Requirements

Overall.

Our business is capital intensive, requiring significant investment for the maintenance of existing gathering systems and the acquisition or construction and development of new gathering systems and other midstream assets and facilities. Our Partnership Agreement required that we categorize our capital expenditures as either:

•maintenance capital expenditures, which are cash expenditures (including expenditures for the addition or improvement to, or the replacement of, our capital assets or for the acquisition of existing, or the construction or development of, new capital assets) made to maintain our long-term operating income or operating capacity; or

•expansion capital expenditures, which are cash expenditures incurred for acquisitions or capital improvements that we expect will increase our operating income or operating capacity over the long term.

In connection with the consummation of the Corporate Reorganization, the Partnership Agreement was amended to, among other things, reflect that all of the issued and outstanding limited partnership interests of the Partnership are held by Summit Midstream Corporation. For information on the Corporate Reorganization, see Note 16 – Subsequent Events.

For the six months ended June 30, 2024, cash paid for capital expenditures totaled $26.9 million which included $6.3 million of maintenance capital expenditures. For the six months ended June 30, 2024, we did not make any contributions to Ohio Gathering and we contributed $0.4 million to Double E.

We rely primarily on internally generated cash flows, our current cash balance as well as external financing sources, including commercial bank borrowings and the issuance of debt, equity and preferred equity securities, and proceeds from potential asset divestitures to fund our capital expenditures. We believe that our internally generated cash flows, current cash balance, our ABL Facility and the Permian Transmission Credit Facility, and access to debt or equity capital markets, will be adequate to finance our operations for the next twelve months without adversely impacting our liquidity. .

We estimate that our 2024 capital program will range from $30.0 million to $40.0 million, including between $10.0 million and $15.0 million of maintenance capital expenditures. We estimate that our 2024 investment in our Double E equity method investee will be approximately $5.0 million.

There are a number of risks and uncertainties that could cause our current expectations to change, including, but not limited to, (i) the ability to reach agreements with third parties; (ii) prevailing conditions and outlook in the natural gas, crude oil and NGLs and markets, and (iii) our ability to obtain financing from commercial banks, the capital markets, or other financing sources.

Excess Cash Flow Offers to Purchase.

Starting in the first quarter of 2023 with respect to the fiscal year ended 2022, and continuing annually through the fiscal year 2025, we were required under the terms of the 2026 Secured Notes Indenture to, if we have Excess Cash Flow (as defined in the 2026 Secured Notes Indenture), and subject to our ability to make such an offer under the ABL Facility, offer to purchase an amount of the 2026 Secured Notes, at 100% of the principal amount plus accrued and unpaid interest, equal to 100% of the Excess Cash Flow generated in the prior year. Excess Cash Flow is generally defined as consolidated cash flow minus the sum of capital expenditures and cash payments in respect of permitted investments and permitted restricted payments.

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Generally, if we did not offer to purchase designated annual amounts of our 2026 Secured Notes or reduce our first lien capacity under the 2026 Secured Notes Indenture per annum from 2023 through 2025, the interest rate on the 2026 Secured Notes is subject to certain rate escalations. Per the terms of the 2026 Secured Notes Indenture, the designated amounts are to offer to purchase $50.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2023, otherwise the interest rate shall automatically increase by 50 basis points per annum; $100.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2024, otherwise the interest rate shall automatically increase by 100 basis points per annum (minus any amount previously increased); and $200.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2025, otherwise the interest rate shall automatically increase by 200 basis points per annum (minus any amount previously increased).

Based on the amount of our Excess Cash Flow for the fiscal year ended 2023, on March 27, 2024, we commenced a cash tender offer to purchase up to $19.3 million aggregate principal amount of the outstanding 2026 Secured Notes at 100% of the principal amount plus accrued and unpaid interest. The cash flow offer expired on April 24, 2024 with $13.6 million tendered, validly accepted and fully discharged as of June 30, 2024.

For additional information, see Note 16 – Subsequent Events.

Credit and Counterparty Concentration Risks

We examine the creditworthiness of counterparties to whom we extend credit and manage our exposure to credit risk through credit analysis, credit approval, credit limits and monitoring procedures, and for certain transactions, we may request letters of credit, prepayments or guarantees.

Certain of our customers may be temporarily unable to meet their current obligations. While this may cause disruption to cash flows, we believe that we are properly positioned to deal with the potential disruption because the vast majority of our gathering assets are strategically positioned at the beginning of the midstream value chain. The majority of our infrastructure is connected directly to our customers’ wellheads and pad sites, which means our gathering systems are typically the first third-party infrastructure through which our customers’ commodities flow and, in many cases, the only way for our customers to get their production to market.

We have exposure due to nonperformance under our MVC contracts whereby a potential customer, may not have the wherewithal to make its MVC shortfall payments when they become due. We typically receive payment for all prior-year MVC shortfall billings in the quarter immediately following billing. Therefore, our exposure to risk of nonperformance is limited to and accumulates during the current year-to-date contracted measurement period.

Off-Balance Sheet Arrangements

During the three and six months ended June 30, 2024, there were no material changes to the off-balance sheet obligations disclosed in our 2023 Annual Report.

Summarized Financial Information

The supplemental summarized financial information below reflects SMLP's separate accounts, the combined accounts of Summit Holdings and Finance Corp. (together, the “Co-Issuers”) and its guarantor subsidiaries (the “Guarantor Subsidiaries” and together with the Co-Issuers, the “Obligor Group”) for the dates and periods indicated. The financial information of the Obligor Group is presented on a combined basis and intercompany balances and transactions between the Co-Issuers and Guarantor Subsidiaries have been eliminated. There were no reportable transactions between the Co-Issuers and Obligor Group and the subsidiaries that were not issuers or guarantors of the Senior Notes.

Payments to holders of the Senior Notes are affected by the composition of and relationships among the Co-Issuers, the Guarantor Subsidiaries and Permian Holdco and Summit Permian Transmission, both of which are unrestricted subsidiaries of SMLP and are not issuers or guarantors of the Senior Notes. The assets of our unrestricted subsidiaries are not available to satisfy the demands of the holders of the Senior Notes. In addition, our unrestricted subsidiaries are subject to certain contractual restrictions related to the payment of dividends, and other rights in favor of their non-affiliated stakeholders, that limit their ability to satisfy the demands of the holders of the Senior Notes.

On March 22, 2024, we completed the disposition of Summit Utica, to a subsidiary of MPLX LP. In connection with the disposition, the status of Summit Utica as guarantor subsidiary, was modified prior to the occurrence of the disposition.

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On May 1, 2024, we completed the sale of our Mountaineer Midstream system to Antero Midstream LLC. In connection with the sale, we designated Mountaineer Midstream Company, LLC as an unrestricted subsidiary, terminating its status as a guarantor subsidiary prior to the occurrence of the sale.

The summarized financial information below presents the activities and balances of Summit Utica and Mountaineer Midstream as guarantor subsidiaries for all summarized income statement periods and balance sheet dates presented in which they were owned by the Partnership. Summit Utica and Mountaineer Midstream are not included in the Partnership’s balance sheet as of June 30, 2024.

Summarized Balance Sheet Information. Summarized balance sheet information as of June 30, 2024 and December 31, 2023 follows.


	June 30, 2024
	SMLP		Obligor Group
	(In thousands)
Assets
Current assets	$	2,495	$	215,781
Noncurrent assets	10,234		1,488,737

Liabilities
Current liabilities	$	15,815	$	132,410
Noncurrent liabilities	1,228		794,587


	December 31, 2023
	SMLP		Obligor Group
	(In thousands)
Assets
Current assets	$	2,993	$	93,035
Noncurrent assets	9,801		2,069,149

Liabilities
Current liabilities	$	10,395	$	104,694
Noncurrent liabilities	2,054		1,383,704

Summarized Statements of Operations Information. For the purposes of the following summarized statements of operations, we allocate a portion of general and administrative expenses recognized at the SMLP parent to the Obligor Group to reflect what those entities' results would have been had they operated on a stand-alone basis. Summarized statements of operations for the six months ended June 30, 2024 and for the year ended December 31, 2023 follow.


	Six Months Ended June 30, 2024
	SMLP		Obligor Group
	(In thousands)
Total revenues	$	—	$	214,370
Total costs and expenses	11,808		252,331
Income (loss) before income taxes and income from equity method investees	(11,808)		106,703
Income from equity method investees	—		—
Net income (loss)	$	(11,365)	$	113,742

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	Year Ended December 31, 2023
	SMLP		Obligor Group
	(In thousands)
Total revenues	$	—	$	451,032
Total costs and expenses	3,882		373,245
Loss before income taxes and income from equity method investees	(3,661)		(60,615)
Income from equity method investees	—		22,922
Net loss	$	(3,983)	$	(37,693)

Critical Accounting Estimates

We prepare our financial statements in accordance with GAAP. These principles are established by the FASB. We employ methods, estimates and assumptions based on currently available information when recording transactions resulting from business operations. There have been no significant changes to our critical accounting estimates from those disclosed on Form 10-K for the fiscal year ended December 31, 2023.

Forward-Looking Statements

Investors are cautioned that certain statements contained in this report as well as in periodic press releases and certain oral statements made by our officers and employees during our presentations are “forward-looking” statements. Forward-looking statements include, without limitation, any statement that may project, indicate or imply future results, events, performance or achievements and may contain the words “expect,” “intend,” “plan,” “anticipate,” “estimate,” “believe,” “will be,” “will continue,” “will likely result,” and similar expressions, or future conditional verbs such as “may,” “will,” “should,” “would,” and “could.” In addition, any statement concerning future financial performance (including future revenues, earnings or growth rates), ongoing business strategies or prospects, and possible actions taken by us or our subsidiaries are also forward-looking statements. These forward-looking statements involve various risks and uncertainties, including, but not limited to, those described in Part II. Item 1A. Risk Factors included in this report.

Forward-looking statements are based on current expectations and projections about future events and are inherently subject to a variety of risks and uncertainties, many of which are beyond the control of our management team. All forward-looking statements in this report and subsequent written and oral forward-looking statements attributable to us, or to persons acting on our behalf, are expressly qualified in their entirety by the cautionary statements in this paragraph. These risks and uncertainties include, among others:

•our decision whether to pay, or our ability to grow, our cash distributions;

•fluctuations in natural gas, NGLs and crude oil prices, including as a result of political or economic measures taken by various countries or OPEC;

•the extent and success of our customers' drilling and completion efforts, as well as the quantity of natural gas, crude oil, freshwater deliveries, and produced water volumes produced within proximity of our assets;

•failure or delays by our customers in achieving expected production in their natural gas, crude oil and produced water projects;

•competitive conditions in our industry and their impact on our ability to connect hydrocarbon supplies to our gathering and processing assets or systems;

•actions or inactions taken or nonperformance by third parties, including suppliers, contractors, operators, processors, transporters and customers, including the inability or failure of our shipper customers to meet their financial obligations under our gathering agreements and our ability to enforce the terms and conditions of certain of our gathering agreements in the event of a bankruptcy of one or more of our customers;

•our ability to divest of certain of our assets to third parties on attractive terms, which is subject to a number of factors, including prevailing conditions and outlook in the natural gas, NGL and crude oil industries and markets;

•the ability to attract and retain key management personnel;

•commercial bank and capital market conditions and the potential impact of changes or disruptions in the credit and/or capital markets;

•changes in the availability and cost of capital and the results of our financing efforts, including availability of funds in the credit and/or capital markets;

•restrictions placed on us by the agreements governing our debt and preferred equity instruments;

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•the availability, terms and cost of downstream transportation and processing services;

•natural disasters, accidents, weather-related delays, casualty losses and other matters beyond our control;

•the current and potential future impact of pandemics on our business, results of operations, financial position or cash flows;

•operational risks and hazards inherent in the gathering, compression, treating and/or processing of natural gas, crude oil and produced water;

•our ability to comply with the terms of the agreements comprising the Global Settlement;

•weather conditions and terrain in certain areas in which we operate;

•physical and financial risks associated with climate change;

•any other issues that can result in deficiencies in the design, installation or operation of our gathering, compression, treating, processing and freshwater facilities;

•timely receipt of necessary government approvals and permits, our ability to control the costs of construction, including costs of materials, labor and rights-of-way and other factors that may impact our ability to complete projects within budget and on schedule;

•our ability to finance our obligations related to capital expenditures, including through opportunistic asset divestitures or joint ventures and the impact any such divestitures or joint ventures could have on our results;

•the effects of existing and future laws and governmental regulations, including environmental, safety and climate change requirements and federal, state and local restrictions or requirements applicable to oil and/or gas drilling, production or transportation;

•the effects of litigation;

•interest rates;

•changes in general economic conditions;

•our ability to effect a transaction pursuant to our strategic review; and

•certain factors discussed elsewhere in this report.

Developments in any of these areas could cause actual results to differ materially from those anticipated or projected or cause a significant reduction in the market price of our common units, preferred units and senior notes.

The foregoing list of risks and uncertainties may not contain all of the risks and uncertainties that could affect us. In addition, in light of these risks and uncertainties, the matters referred to in the forward-looking statements contained in this document may not in fact occur. Accordingly, undue reliance should not be placed on these statements. We undertake no obligation to publicly update or revise any forward-looking statements as a result of new information, future events or otherwise, except as otherwise required by law.

Information About Us

Investors should note that we make available, free of charge on our website at www.summitmidstream.com, our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and any amendments to those reports as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. We also post announcements, updates, events, investor information and presentations on our website in addition to copies of all recent news releases. We may use the Investors section of our website to communicate with investors. It is possible that the financial and other information posted there could be deemed to be material information. Documents and information on our website are not incorporated by reference herein.

The SEC maintains a website at www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers, including us, that file electronically with the SEC.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Interest Rate Risk

Our interest rate risk exposure, which is largely related to our indebtedness, has not changed materially since December 31, 2023. As of June 30, 2024, we had approximately $814.2 million principal of fixed-rate debt, nil outstanding under our variable rate ABL Facility and $137.2 million outstanding under the variable rate Permian Transmission Term Loan (see Note 8 - Debt). As of June 30, 2024, we had $123.5 million of interest rate exposure hedged to offset the impact of changes in interest rates on our Permian Transmission Term Loan. While existing fixed-rate debt mitigates the downside impact of fluctuations in interest rates, future issuances of long-term debt could be impacted by increases in interest rates, which could result in higher overall interest costs. In addition, the borrowings under our ABL Facility, which have a variable interest rate, also expose us to the risk of increasing interest rates. For additional information, see the "Interest Rate Risk" section included in Item 7A. Quantitative and Qualitative Disclosures About Market Risk of the 2023 Annual Report and updates to our risk factors included herein.

See Note 16 – Subsequent Events for additional information on our Refinancing Transactions.

Commodity Price Risk

We generate a majority of our revenues pursuant to primarily long-term and fee-based gathering agreements, many of which include MVCs and areas of mutual interest. Our direct commodity price exposure relates to (i) the sale of physical natural gas and/or NGLs purchased under percentage-of-proceeds and other processing arrangements with certain of our customers in the Rockies and Piceance segments, (ii) the sale of natural gas we retain from certain Barnett segment customers and (iii) the sale of condensate we retain from certain gathering services in the Piceance segment. Our gathering agreements with certain Barnett customers permit us to retain a certain quantity of natural gas that we sell to offset the power costs we incur to operate our electric-drive compression assets. We manage our direct exposure to natural gas and power prices through the use of forward power purchase contracts with wholesale power providers that require us to purchase a fixed quantity of power at a fixed heat rate based on prevailing natural gas prices on the Henry Hub Index. We sell retainage natural gas at prices that are based on the Atmos Zone 3 Index. By basing the power prices on a system and basin-relevant market, we are able to closely associate the relationship between the compression electricity expense and natural gas retainage sales. We do not enter into risk management contracts for speculative purposes. Our current commodity price risk exposure has not changed materially since December 31, 2023. For additional information, see the "Commodity Price Risk" section included in Item 7A. Quantitative and Qualitative Disclosures About Market Risk of the 2023 Annual Report.

Item 4. Controls and Procedures.

Under the direction of our General Partner's Chief Executive Officer and Chief Financial Officer, we evaluated our disclosure controls and procedures and internal control over financial reporting and concluded that (i) our disclosure controls and procedures were effective as of June 30, 2024 and (ii) no change in internal control over financial reporting occurred during the quarter ended June 30, 2024, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II - OTHER INFORMATION

Item 1. Legal Proceedings.

Although we may, from time to time, be involved in litigation and claims arising out of our operations in the ordinary course of business, we are not currently a party to any significant legal or governmental proceedings, except as described below. In addition, we are not aware of any significant legal or governmental proceedings contemplated to be brought against us, under the various environmental protection statutes to which we are subject.

Fiberspar Corporation. On May 3, 2022, Fiberspar Corporation (“Fiberspar”) filed a petition in the District Court of Harris County, Texas alleging, before costs and interest, over $5.0 million owed but not paid for orders of pipeline product from Fiberspar. The petition asserts causes of action for breach of contract and suit on sworn account. A civil action on the same claims had been filed by Fiberspar in 2016 but was dismissed without prejudice pursuant to a standstill and tolling agreement that expired in 2021. We filed an answer on September 6, 2022 denying Fiberspar’s claims and asserting counter claims. The case is pending in the District Court of Harris County, Texas. We are unable to predict the final outcome of this matter.

Global Settlement. On August 4, 2021, the Partnership and several of its subsidiaries entered into agreements to resolve government investigations into the previously disclosed 2015 Blacktail Release, from a pipeline owned and operated by Meadowlark Midstream, which at the time was a wholly owned subsidiary of Summit Investments (together with Meadowlark Midstream, the “Companies”). The Companies entered into the following agreements to resolve the U.S. federal and North Dakota state governments’ environmental claims against the Companies with respect to the 2015 Blacktail Release: (i) a Consent Decree with (a) the DOJ, on behalf of the U.S. Environmental Protection Agency and the U.S. Department of Interior, and (b) the State of North Dakota, on behalf of the North Dakota Department of Environmental Quality and the North Dakota Game and Fish Department, lodged with the U.S. District Court; (ii) a Plea Agreement with the United States, by and through the U.S. Attorney for the District of North Dakota, and the Environmental Crimes Section of the DOJ; and (iii) a Consent Agreement with the North Dakota Industrial Commission (together, the “Global Settlement”).

The Consent Decree provides for, among other requirements and subject to the conditions therein, (i) payment of total civil penalties and reimbursement of assessment costs of $21.25 million, with the federal portion of penalties payable over up to five years and the state portion of penalties payable over up to, for the federal and state civil amounts, six years and, for the federal criminal amounts, five years, with interest accruing at, for the federal and state civil amounts, a fixed rate of 3.25% and, for the federal criminal amounts, a variable rate set by statute; (ii) continuation of remediation efforts at the site of the 2015 Blacktail Release; (iii) other injunctive relief, including, but not limited to, control room management, an environmental management system audit, training, and reporting; and (iv) no admission of liability to the U.S. or North Dakota. The Consent Decree was entered by the U.S. District Court on September 28, 2021.

The Consent Agreement settles a complaint brought by the North Dakota Industrial Commission in an administrative action against the Companies for alleged violations of the North Dakota Administrative Code (“NDAC”) arising from the 2015 Blacktail Release on the following terms: (i) the Companies admit to three counts of violating the NDAC; (ii) the Companies agree to follow the terms and conditions of the Consent Decree, including payment of penalty and reimbursement amounts set forth in the Consent Decree; and (iii) specified conditions in the Consent Decree regarding operation and testing of certain existing produced water pipelines shall survive until those pipelines are properly abandoned.

Under the Plea Agreement, the Companies agreed to, among other requirements and subject to the conditions therein, (i) enter guilty pleas for one charge of negligent discharge of a harmful quantity of oil and one charge of knowing failure to immediately report a discharge of oil; (ii) sentencing that includes payment of a fine of $15.0 million plus mandatory special assessments over a period of up to five years with interest accruing at the federal statutory rate; (iii) organizational probation for a minimum period of three years from sentencing on December 6, 2021, which will include payment in full of certain components of the fines and penalty amounts; and (iv) compliance with the remedial measures in the Consent Decree.

On December 6, 2021, the U.S. District Court accepted the Plea Agreement. This Global Settlement resulted in losses amounting to $36.3 million and will be paid over five to six years, of which we have paid principal amounts of $14.7 million as of June 30, 2024.

Sage Natural Resources. In July 2022, the Partnership’s subsidiary DFW Midstream filed a petition in the District Court of Dallas County, Texas seeking payment, before costs and interest, of approximately $1.0 million in electric power costs for gathering services provided to Sage Natural Resources, LLC (“Sage”) in 2021-2022. On July 25, 2024, this matter was resolved with no material impact to the Partnership.

Item 1A. Risk Factors.

The risk factors contained in Exhibit 99.1 to the Partnership’s Current Report on Form 8-K filed with the SEC on June 3, 2024 are incorporated herein by reference except to the extent they address risks arising from or relating to the failure of events described therein to occur, which events have since occurred.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

None.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosure.

Not applicable.

Item 5. Other Information.

None.

Item 6. Exhibits.


Exhibit number		Description
2.1		Agreement and Plan of Merger, dated as of May 31, 2024, by and among Summit Midstream Corporation, Summit SMC NewCo, LLC, Summit Midstream Partners, LP and Summit Midstream GP, LLC (Incorporated herein by reference to Exhibit 2.1 to SMLP’s Current Report on Form 8-K filed June 3, 2024 (Commission File No. 001-35666))
3.1		Fifth Amended and Restated Agreement of Limited Partnership of Summit Midstream Partners, LP, dated August 1, 2024 (Incorporated herein by reference to Exhibit 3.1 to SMLP's Current Report on Form 8-K filed August 1, 2024 (Commission File No. 001-35666)).
3.2		Third Amended and Restated Limited Liability Company Agreement of Summit Midstream GP, LLC, dated August 1, 2024 (Incorporated herein by reference to Exhibit 3.2 to SMLP's Current Report on Form 8-K filed August 1, 2024 (Commission File No. 001-35666)).
3.3		Certificate of Limited Partnership of Summit Midstream Partners, LP (Incorporated herein by reference to Exhibit 3.1 to SMLP's Form S-1 Registration Statement dated August 21, 2012 (Commission File No. 333-183466))
3.4		Certificate of Formation of Summit Midstream GP, LLC (Incorporated herein by reference to Exhibit 3.4 to SMLP's Form S-1 Registration Statement dated August 21, 2012 (Commission File No. 333-183466))
10.1		Purchase and Sale Agreement, dated May 1, 2024, by and among Mountaineer Midstream Company, LLC, as Seller, and Antero Midstream LLC, as Buyer, and for the limited purposes expressly set forth thereto, Summit Midstream Partners, LP (Incorporated herein by reference to Exhibit 10.1 to SMLP’s Quarterly Report on Form 10-Q filed May 6, 2024 (Commission File No. 001-35666))
10.2		First Amendment to the Summit Midstream Partners, LP 2022 Long-Term Incentive Plan (Incorporated herein by reference to Exhibit 10.1 to SMLP’s Current Report on Form 8-K filed May 22, 2024 (Commission File No. 001-35666))
31.1	+	Rule 13a-14(a)/15d-14(a) Certification, executed by Heath Deneke, President, Chief Executive Officer and Director
31.2	+	Rule 13 a-14(a)/15d-14(a) Certification, executed by William J. Mault, Executive Vice President and Chief Financial Officer
32.1	+	Certifications required by Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350), executed by Heath Deneke, President, Chief Executive Officer and Director, and William J. Mault, Executive Vice President and Chief Financial Officer
101.INS	*	Inline 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	*	Inline XBRL Taxonomy Extension Schema
101.CAL	*	Inline XBRL Taxonomy Extension Calculation Linkbase
101.DEF	*	Inline XBRL Taxonomy Extension Definition Linkbase
101.LAB	*	Inline XBRL Taxonomy Extension Label Linkbase
101.PRE	*	Inline XBRL Taxonomy Extension Presentation Linkbase
104	*	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).

+ Filed herewith.

* Pursuant to Rule 406T of Regulation S-T, the Interactive Data Files on Exhibit 101 hereto are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, are deemed

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not filed for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, and otherwise are not subject to liability under those sections. The financial information contained in the XBRL (eXtensible Business Reporting Language)-related documents is unaudited and unreviewed.

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SIGNATURES

Pursuant to the requirements 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.


			Summit Midstream Partners, LP
			(Registrant)

			By: Summit Midstream GP, LLC (its General Partner)

August 9, 2024			/s/ WILLIAM J. MAULT
			William J. Mault, Executive Vice President and Chief Financial Officer (Principal Financial Officer)

EXHIBIT 31.1

CERTIFICATIONS

I, Heath Deneke, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Summit Midstream Partners, LP;

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:	August 9, 2024	/s/ Heath Deneke
		Heath Deneke President, Chief Executive Officer and Director of Summit Midstream GP, LLC (the general partner of Summit Midstream Partners, LP)

EX 31.1

EXHIBIT 31.2

CERTIFICATIONS

I, William J. Mault, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Summit Midstream Partners, LP;

(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:	August 9, 2024	/s/ William J. Mault
		William J. Mault Executive Vice President and Chief Financial Officer of Summit Midstream GP, LLC (the general partner of Summit Midstream Partners, LP)

EX 31.2

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 quarterly report on Form 10-Q of Summit Midstream Partners, LP (the “Registrant”) for the quarterly period ended June 30, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Heath Deneke, as President, Chief Executive Officer and Director of Summit Midstream GP, LLC, the general partner of the Registrant, and William J. Mault, as Executive Vice President and Chief Financial Officer of Summit Midstream GP, LLC, the general partner of the Registrant, each hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 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 Registrant.


/s/ Heath Deneke
Name:						Heath Deneke
Title:						President, Chief Executive Officer and Director of Summit Midstream GP, LLC (the general partner of Summit Midstream Partners, LP)
Date:						August 9, 2024


/s/ William J. Mault
Name:						William J. Mault
Title:						Executive Vice President and Chief Financial Officer of Summit Midstream GP, LLC (the general partner of Summit Midstream Partners, LP)
Date:						August 9, 2024

EX 32.1

v3.24.2.u1

Cover Page
6 Months Ended

Jun. 30, 2024

Cover [Abstract]

Document Type 10-Q

Document Quarterly Report true

Document Period End Date Jun. 30, 2024

Document Transition Report false

Entity File Number 001-35666

Entity Registrant Name Summit Midstream Partners, LP

Entity Incorporation, State or Country Code DE

Entity Tax Identification Number 45-5200503

Entity Address, Address Line One 910 Louisiana Street

Entity Address, Address Line Two Suite 4200

Entity Address, City or Town Houston

Entity Address, State or Province TX

Entity Address, Postal Zip Code 77002

City Area Code 832

Local Phone Number 413-4770

Title of 12(b) Security Common Units

Trading Symbol SMLP

Security Exchange Name NYSE

Entity Current Reporting Status Yes

Entity Interactive Data Current Yes

Entity Filer Category Accelerated Filer

Entity Small Business true

Entity Emerging Growth Company false

Entity Shell Company false

Entity Central Index Key 0001549922

Amendment Flag false

Current Fiscal Year End Date --12-31

Document Fiscal Year Focus 2024

Document Fiscal Period Focus Q2

v3.24.2.u1

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands

Jun. 30, 2024

Dec. 31, 2023

ASSETS

Cash and cash equivalents $ 156,008 $ 14,044

Restricted cash 4,208 2,601

Accounts receivable 55,991 76,275

Other current assets 5,227 5,502

Total current assets 221,434 98,422

Property, plant and equipment, net 1,366,522 1,698,585

Intangible assets, net 143,735 175,592

Investment in equity method investees 271,622 486,434

Other noncurrent assets 29,625 35,165

TOTAL ASSETS 2,032,938 2,494,198

LIABILITIES AND CAPITAL

Trade accounts payable 19,090 22,714

Accrued expenses 32,494 32,377

Deferred revenue 8,305 10,196

Ad valorem taxes payable 4,819 8,543

Accrued compensation and employee benefits 4,943 6,815

Accrued interest 16,160 19,298

Accrued environmental remediation 1,764 1,483

Accrued settlement payable 6,667 6,667

Current portion of long-term debt 65,708 15,524

Other current liabilities 6,695 10,395

Total current liabilities 166,645 134,012

Long-term debt, net 861,676 1,455,166

Noncurrent deferred revenue 29,496 30,085

Noncurrent accrued environmental remediation 1,198 1,454

Other noncurrent liabilities 21,839 30,266

TOTAL LIABILITIES 1,080,854 1,650,983

Commitments and contingencies (Note 14)

Mezzanine Capital

Subsidiary Series A Preferred Units (93,039 units issued and outstanding at June 30, 2024 and December 31, 2023) 129,032 124,652

Partners' Capital

Series A Preferred Units (65,508 units issued and outstanding at June 30, 2024 and December 31, 2023) 103,426 96,893

Common limited partner capital (10,648,685 and 10,376,189 units issued and outstanding at June 30, 2024 and December 31, 2023, respectively) 719,626 621,670

Total partners' capital 823,052 718,563

TOTAL LIABILITIES AND CAPITAL $ 2,032,938 $ 2,494,198

v3.24.2.u1

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares

Jun. 30, 2024

Dec. 31, 2023

Partners' Capital

Common limited partner capital, issued (in shares) 10,648,685 10,376,189

Common limited partner capital, outstanding (in shares) 10,648,685 10,376,189

Subsidiary Series A Preferred Units

Preferred units, issued (in shares) 93,039,000 93,039,000

Series A Preferred Units Outstanding (in shares) 93,039,000 93,039,000

Series A Preferred Units

Partners' Capital

Preferred units, issued (in shares) 65,508 65,508

Preferred units, outstanding (in shares) 65,508 65,508

v3.24.2.u1

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Jun. 30, 2024

Jun. 30, 2023

Revenues:

Total revenues $ 101,315 $ 97,893 $ 220,186 $ 210,392

Costs and expenses:

Type of Cost, Good or Service [Extensible List] Natural Gas Liquids (NGL) [Member] Natural Gas Liquids (NGL) [Member] Natural Gas Liquids (NGL) [Member] Natural Gas Liquids (NGL) [Member]

Cost of natural gas and NGLs $ 29,619 $ 19,975 $ 59,801 $ 50,857

Operation and maintenance 23,440 25,158 48,452 49,130

General and administrative 14,164 10,812 28,949 20,799

Depreciation and amortization 23,917 30,132 51,784 59,956

Transaction costs 3,271 480 11,062 782

Acquisition integration costs 0 723 40 2,225

(Gain) loss on asset sales, net 34 (75) 7 (143)

Long-lived asset impairments 20 455 67,936 455

Total costs and expenses 94,465 87,660 268,031 184,061

Other income, net 2,131 1,006 2,118 1,062

Gain on interest rate swaps 920 3,268 3,510 1,995

Gain (loss) on sale of business (2,192) (54) 84,010 (36)

Gain on sale of Ohio Gathering 0 0 126,261 0

Interest expense (31,457) (35,175) (69,303) (69,398)

Loss on early extinguishment of debt (4,964) 0 (4,964) 0

Income (loss) before income taxes and equity method investment income (28,712) (20,722) 93,787 (40,046)

Income tax benefit 654 0 444 252

Income from equity method investees 4,280 7,182 14,918 12,091

Net income (loss) (23,778) (13,540) 109,149 (27,703)

Less: Net income attributable to Subsidiary Series A Preferred Units (3,866) (3,496) (7,636) (5,242)

Net income (loss) attributable to Summit Midstream Partners, LP (27,644) (17,036) 101,513 (32,945)

Less: net income attributable to Series A Preferred Units (3,313) (2,799) (6,533) (5,438)

Net income (loss) attributable to common limited partners $ (30,957) $ (19,835) $ 94,980 $ (38,383)

Net income (loss) per limited partner unit:

Common unit - basic (in dollars per share) $ (2.91) $ (1.91) $ 9.00 $ (3.73)

Common unit - diluted (in dollars per share) $ (2.91) $ (1.91) $ 8.57 $ (3.73)

Weighted-average limited partner units outstanding:

Common units – basic (in shares) 10,649 10,369 10,549 10,291

Common units - diluted (in shares) 10,649 10,369 11,081 10,291

Gathering services and related fees

Revenues:

Total revenues $ 45,213 $ 57,086 $ 107,198 $ 114,457

Natural gas, NGLs and condensate sales

Revenues:

Total revenues 47,959 36,082 97,051 85,245

Other revenues

Revenues:

Total revenues $ 8,143 $ 4,725 $ 15,937 $ 10,690

v3.24.2.u1

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL - USD ($)
$ in Thousands

Total

Common Limited Partners Capital

Common Limited Partners Capital

Series A Preferred Units

Beginning balance at Dec. 31, 2022 $ 764,818 $ 679,491 $ 85,327

Increase (Decrease) in Stockholders' Equity [Roll Forward]

Net income (loss) (15,909) (18,548) 2,639

Unit-based compensation 1,929 1,929 0

Tax withholdings and associated payments on vested SMLP LTIP awards (1,136) (1,136) 0

Ending balance at Mar. 31, 2023 749,702 661,736 87,966

Increase (Decrease) in Stockholders' Equity [Roll Forward]

Net income (loss) (17,036) (19,835) 2,799

Unit-based compensation 1,833 1,833 0

Tax withholdings and associated payments on vested SMLP LTIP awards (148) (148) 0

Ending balance at Jun. 30, 2023 734,351 643,586 90,765

Beginning balance at Dec. 31, 2023 718,563 621,670 96,893

Increase (Decrease) in Stockholders' Equity [Roll Forward]

Net income (loss) 129,157 125,937 3,220

Unit-based compensation 2,772 2,772 0

Tax withholdings and associated payments on vested SMLP LTIP awards (1,878) (1,878) 0

Ending balance at Mar. 31, 2024 848,614 748,501 100,113

Increase (Decrease) in Stockholders' Equity [Roll Forward]

Net income (loss) (27,644) (30,957) 3,313

Unit-based compensation 2,086 2,086 0

Tax withholdings and associated payments on vested SMLP LTIP awards (4) (4) 0

Ending balance at Jun. 30, 2024 $ 823,052 $ 719,626 $ 103,426

v3.24.2.u1

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Cash flows from operating activities:

Net income (loss) $ 109,149 $ (27,703)

Adjustments to reconcile net loss to net cash provided by operating activities:

Depreciation and amortization 52,254 60,425

Noncash lease expense 1,705 2,827

Amortization of debt issuance costs 6,903 6,325

Unit-based and noncash compensation 4,858 3,762

Income from equity method investees (14,918) (12,091)

Distributions from equity method investees 23,659 23,904

Interest income and other (2,498) (175)

Loss on early extinguishment of debt 4,964 0

Gain on sale of business (84,010) 0

Gain on sale of equity method investment (126,261) 0

Unrealized (gain) loss on interest rate swaps (853) 423

Long-lived asset impairment 67,936 455

Changes in operating assets and liabilities:

Accounts receivable 14,462 14,783

Trade accounts payable (6,076) 81

Accrued expenses (702) (1,429)

Deferred revenue, net (2,153) (2,331)

Ad valorem taxes payable (3,724) (4,247)

Accrued interest (3,138) 1,049

Accrued environmental remediation, net 26 (556)

Other, net (10,610) (13,862)

Net cash provided by operating activities 30,973 51,640

Cash flows from investing activities:

Capital expenditures (26,920) (32,178)

Proceeds from Summit Utica Sale (excluding Ohio Gathering) 292,266 0

Proceeds from sale of Ohio Gathering 332,734 0

Proceeds from Mountaineer Transaction 70,000 0

Proceeds from asset sale 4,400 128

Investment in Double E equity method investee (442) (3,500)

Other, net 0 (2,667)

Net cash provided by (used in) investing activities 672,038 (38,217)

Cash flows from financing activities:

Debt repayments - ABL Facility (313,000) (37,000)

Debt repayments - Redemption of 2026 Unsecured Notes (209,510) 0

Borrowings on ABL Facility 0 35,000

Distributions on Subsidiary Series A Preferred Units (3,256) (3,256)

Payments To Acquire Common Units (2,095) 0

Debt issuance costs 0 (168)

Other, net (3,422) (1,533)

Net cash used in financing activities (559,440) (12,077)

Net change in cash, cash equivalents and restricted cash 143,571 1,346

Cash, cash equivalents and restricted cash, beginning of period 16,645 13,531

Cash, cash equivalents and restricted cash, end of period 160,216 14,877

2026 Secured Notes Excess Cash Flow Offer

Cash flows from financing activities:

Debt repayments - Secured Notes (13,626) 0

2026 Secured Notes Asset Sale Offer

Cash flows from financing activities:

Debt repayments - Secured Notes (6,910) 0

Permian Transmission Term Loan

Cash flows from financing activities:

Debt repayments - Secured Notes $ (7,621) $ (5,120)

v3.24.2.u1

ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION
6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION
1. ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION
Organization. Summit Midstream Partners, LP (including its subsidiaries, collectively “SMLP” or the “Partnership”) is a Delaware limited partnership that was formed in May 2012 and began operations in October 2012. SMLP is a value-oriented limited partnership focused on developing, owning and operating midstream energy infrastructure assets that are strategically located in unconventional resource basins, primarily shale formations, in the continental United States. The Partnership’s business activities are primarily conducted through various operating subsidiaries, each of which is owned or controlled by its wholly owned subsidiary holding company, Summit Holdings, a Delaware limited liability company.
Business Operations. The Partnership provides natural gas gathering, compression, treating and processing services as well as crude oil and produced water gathering services pursuant to primarily long-term, fee-based agreements with its customers. In addition to these services, the Partnership also provides freshwater delivery services pursuant to short-term agreements with customers. The Partnership’s results are primarily driven by the volumes of natural gas that it gathers, compresses, treats and/or processes as well as by the volumes of crude oil and produced water that it gathers. As of June 30, 2024, other than the Partnership’s investment in Double E, all of its business activities are conducted through wholly owned operating subsidiaries.
Presentation and Consolidation. The Partnership prepares its condensed consolidated financial statements in accordance with GAAP as established by the FASB and pursuant to the rules and regulations of the SEC pertaining to interim financial information. The unaudited condensed consolidated financial statements contained in this report include all normal and recurring material adjustments that, in the opinion of management, are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods presented herein. These unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and related notes that are included in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2023.
The Partnership makes estimates and assumptions that affect the reported amounts of assets and liabilities at the balance sheet dates, including fair value measurements, the reported amounts of revenues and expenses and the disclosure of commitments and contingencies. Although management believes these estimates are reasonable, actual results could differ from its estimates.
The unaudited condensed consolidated financial statements include the assets, liabilities and results of operations of SMLP and its subsidiaries. All intercompany transactions among the consolidated entities have been eliminated in consolidation. Comprehensive income or loss is the same as net income or loss for all periods presented.

v3.24.2.u1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP
6 Months Ended

Jun. 30, 2024

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP
There have been no changes to the Partnership’s significant accounting policies since December 31, 2023.
Accounting standards recently implemented. ASU No. 2020-06 Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815–40) (“ASU 2020-06”). ASU 2020-06 simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity. The ASU is part of the FASB’s simplification initiative, which aims to reduce unnecessary complexity in GAAP. The ASU’s amendments are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. The provisions of ASU 2020-06 did not have a material impact on the Partnership’s condensed consolidated financial statements and disclosures.
New accounting standards not yet implemented. ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). ASU 2023-07 enhances disclosures on reportable segments and provides additional detailed information about significant segment expenses. The guidance in ASU 2023-07 is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The Partnership continues to assess the impact of the new guidance, but does not expect the provisions of ASU 2023-07 will have a material impact on its consolidated financial statements and disclosures.

v3.24.2.u1

DIVESTITURES
6 Months Ended

Jun. 30, 2024

Discontinued Operations and Disposal Groups [Abstract]

DIVESTITURES
3. DIVESTITURES
Summit Utica Sale. On March 22, 2024, the Partnership completed the disposition of Summit Utica, LLC (“Summit Utica”) to a subsidiary of MPLX LP (“MPLX”) for a cash sale price of $625.0 million, subject to customary post-closing adjustments (the “Utica Sale”). Summit Utica was the owner of (i) approximately 36% of the issued and outstanding equity interests in OGC, (ii) approximately 38% of the issued and outstanding equity interests in OCC, together with OGC, Ohio Gathering and (iii) midstream assets located in the Utica Shale. Ohio Gathering was the owner of a natural gas gathering system and condensate stabilization facility located in Belmont and Monroe counties in the Utica Shale in southeastern Ohio.
During the quarterly period ended March 31, 2024, the Partnership recognized a total gain on the disposition of Summit Utica of $212.5 million based on total cash proceeds received of $625.0 million and net assets sold of $412.5 million. A portion of the cash proceeds was used to reduce amounts outstanding under the ABL Facility and pay the costs and expenses in connection with the Asset Sale Offer (as defined below) (see Note 8 - Debt, for additional information) and are subject to final working capital adjustments.
The $625.0 million sale price did not discretely list values for either OGC, OCC or the Partnership’s midstream assets located in the Utica Shale. Using fair value methods allowed by GAAP, the Partnership derived a preliminary fair value estimate for the disposed assets and then determined the appropriate gain recognition amount for each disposal to include in its unaudited condensed consolidated financial statements. The estimated fair values were determined utilizing a discounted cash flow technique based on estimated revenues, costs, capital expenditures and an appropriate discount rate. Given the unobservable nature of the inputs, the fair value measurement is deemed to use Level 3 inputs. These fair value estimates are preliminary, and subject to change and such changes could be material. Based on these preliminary fair values, the Partnership recognized a gain on the disposition of the Utica midstream business of $85.6 million, which is recorded within gain on sale of business in the unaudited condensed consolidated statements of operations, and a gain of $126.3 million related to the disposition of Ohio Gathering, which is recorded within gain on sale of Ohio Gathering in the unaudited condensed consolidated statements of operations.
Mountaineer Midstream System. On May 1, 2024, the Partnership completed the sale of its Mountaineer Midstream system, to Antero Midstream LLC for a cash sale price of $70.0 million, subject to customary post-closing adjustments (the “Mountaineer Transaction”). Mountaineer Midstream was the owner of midstream assets located in the Marcellus Shale. Prior to closing the Mountaineer Transaction, the Partnership sold related compression assets located in the Marcellus Shale to a compression service provider for cash consideration of approximately $5 million in April 2024.
During the three months ended March 31, 2024, the Partnership recognized an impairment of $68 million in connection with the Mountaineer Transaction and the sale of compression assets based on their estimated fair value and net assets of approximately $143 million.

v3.24.2.u1

REVENUE
6 Months Ended

Jun. 30, 2024

Revenue from Contract with Customer [Abstract]

REVENUE
4. REVENUE
The following table presents estimated revenue, as of June 30, 2024, expected to be recognized during the remainder of 2024 and over the remaining contract period related to performance obligations that are unsatisfied and are comprised of estimated MVC shortfall payments.
(In thousands) 2024 2025 2026 2027 2028 Thereafter
Gathering services and related fees $ 23,926 $ 37,249 $ 26,112 $ 7,685 $ 5,137 $ —
Revenue by category. In the following tables, revenue is disaggregated by geographic area and major products and services. For more detailed information about reportable segments, see Note 15 – Segment Information.
Three Months Ended June 30, 2024
Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total
(In thousands)
Reportable Segments:
Northeast $ 1,998 $ — $ — $ 1,998
Rockies 16,323 47,214 3,321 66,858
Permian — — 911 911
Piceance 18,063 666 1,234 19,963
Barnett 8,829 79 2,026 10,934
Total reportable segments 45,213 47,959 7,492 100,664
Corporate and other — — 651 651
Total $ 45,213 $ 47,959 $ 8,143 $ 101,315
Six Months Ended June 30, 2024
Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total
(In thousands)
Reportable Segments:
Northeast $ 18,851 $ — $ — $ 18,851
Rockies 32,839 95,184 7,429 135,452
Permian — — 1,821 1,821
Piceance 38,450 1,614 2,479 42,543
Barnett 17,058 253 3,483 20,794
Total reportable segments 107,198 97,051 15,212 219,461
Corporate and other — — 725 725
Total $ 107,198 $ 97,051 $ 15,937 $ 220,186
Three Months Ended June 30, 2023
Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total
(In thousands)
Reportable Segments:
Northeast $ 12,805 $ — $ — $ 12,805
Rockies 14,909 34,575 725 50,209
Permian — — 892 892
Piceance 20,014 1,335 1,373 22,722
Barnett 9,358 172 1,736 11,266
Total reportable segments 57,086 36,082 4,726 97,894
Corporate and other — — (1) (1)
Total $ 57,086 $ 36,082 $ 4,725 $ 97,893
Six Months Ended June 30, 2023
Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total
(In thousands)
Reportable Segments:
Northeast $ 25,560 $ — $ — $ 25,560
Rockies 30,212 81,904 3,344 115,460
Permian — — 1,785 1,785
Piceance 39,133 2,976 2,799 44,908
Barnett 19,552 365 2,800 22,717
Total reportable segments 114,457 85,245 10,728 210,430
Corporate and other — — (38) (38)
Total $ 114,457 $ 85,245 $ 10,690 $ 210,392

v3.24.2.u1

PROPERTY, PLANT AND EQUIPMENT
6 Months Ended

Jun. 30, 2024

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT
5. PROPERTY, PLANT AND EQUIPMENT
Details on the Partnership’s property, plant and equipment follow.
June 30, 2024 December 31, 2023
(In thousands)
Gathering and processing systems and related equipment $ 1,932,418 $ 2,335,980
Construction in progress 42,338 56,064
Land and line fill 11,534 11,534
Other 64,834 65,029
Total
2,051,124 2,468,607
Less: accumulated depreciation (684,602) (770,022)
Property, plant and equipment, net
$ 1,366,522 $ 1,698,585
Depreciation expense and capitalized interest for the Partnership follow.
Three Months Ended June 30, Six Months Ended June 30,
2024 2023 2024 2023
(In thousands) (In thousands)
Depreciation expense $ 20,357 $ 23,285 $ 43,928 $ 46,204
Capitalized interest 175 246 647 439

v3.24.2.u1

EQUITY METHOD INVESTMENTS
6 Months Ended

Jun. 30, 2024

Equity Method Investments and Joint Ventures [Abstract]

EQUITY METHOD INVESTMENTS
6. EQUITY METHOD INVESTMENTS
As of June 30, 2024, the Partnership has an equity method investment in Double E, the balance of which is included in the Investment in equity method investees caption on the unaudited condensed consolidated balance sheets. On March 22, 2024, in connection with the Utica Sale, the Partnership sold its investment in Ohio Gathering and recognized an estimated $126.3 million gain, which is recorded within Gain on sale of Ohio Gathering within the unaudited condensed consolidated statements of operations. See Note 3 - Divestitures for additional information.
Details of the Partnership’s equity method investments follow.
June 30, 2024 December 31, 2023
(In thousands)
Double E $ 271,622 $ 276,221
Ohio Gathering — 210,213
Total $ 271,622 $ 486,434

v3.24.2.u1

DEFERRED REVENUE
6 Months Ended

Jun. 30, 2024

Revenue from Contract with Customer [Abstract]

DEFERRED REVENUE
7. DEFERRED REVENUE
The balances in deferred revenue as of June 30, 2024 and December 31, 2023 are primarily related to contributions in aid of construction which will be recognized as revenue over the life of the contract. An update of current deferred revenue follows.
Total
(In thousands)
Current deferred revenue, December 31, 2023 $ 10,196
Add: additions
3,830
Less: revenue recognized and other
(5,721)
Current deferred revenue, June 30, 2024 $ 8,305
An update of noncurrent deferred revenue follows.
Total
(In thousands)
Noncurrent deferred revenue, December 31, 2023 $ 30,085
Add: additions
3,378
Less: reclassification to current deferred revenue and other
(3,967)
Noncurrent deferred revenue, June 30, 2024 $ 29,496

v3.24.2.u1

DEBT
6 Months Ended

Jun. 30, 2024

Debt Disclosure [Abstract]

DEBT
8. DEBT
Debt for the Partnership at June 30, 2024 and December 31, 2023, follows:
June 30, 2024 December 31, 2023
(In thousands)
ABL Facility: Summit Holdings' asset based credit facility due May 1, 2026
$ — $ 313,000
Permian Transmission Term Loan: Summit Permian Transmission's variable rate senior secured term loan due January 2028
137,225 144,846
2026 Unsecured Notes: 12.00% senior unsecured notes due October 15, 2026
— 209,510
2025 Senior Notes: 5.75% senior unsecured notes due April 15, 2025
49,783 49,783
2026 Secured Notes: 8.50% senior second lien notes due October 15, 2026
764,464 785,000
Less: unamortized debt discount and debt issuance costs (24,088) (31,449)
Total debt, net of unamortized debt discount and debt issuance costs 927,384 1,470,690
Less: current portion of Permian Transmission Term Loan and 2025 Senior Notes redemption
(65,708) (15,524)
Total long-term debt $ 861,676 $ 1,455,166
ABL Facility. On November 2, 2021, the Partnership, the Partnership’s subsidiary, Summit Holdings, and certain subsidiaries of Summit Holdings party thereto entered into a first-lien, senior secured credit facility, consisting of a $400.0 million asset-based revolving credit facility (the “ABL Facility”), subject to a borrowing base comprised of a percentage of eligible accounts receivable of Summit Holdings and its subsidiaries that guarantee the ABL Facility (collectively, the “ABL Facility Subsidiary Guarantors”) and a percentage of eligible above-ground fixed assets including eligible compression units, processing plants, compression stations and related equipment of Summit Holdings and the ABL Facility Subsidiary Guarantors. As of June 30, 2024, the most recent borrowing base determination of eligible assets totaled $632.1 million, an amount greater than the $400.0 million of aggregate lending commitments.
As of June 30, 2024, the ABL Facility will mature on May 1, 2026; provided that if the outstanding amount of the 2025 Senior Notes (or any permitted refinancing indebtedness in respect thereof that has a final maturity, scheduled amortization or any other scheduled repayment, mandatory prepayment, mandatory redemption or sinking fund obligation prior to the date that is 120 days after the Termination Date (as defined in the ABL Agreement)) on such date equals or exceeds $50.0 million, then the ABL Facility will mature on December 13, 2024. As of June 30, 2024, the outstanding balance of the 2025 Senior Notes was $49.8 million.
As of June 30, 2024, the available borrowing capacity of the ABL Facility totaled $371.7 million after giving effect to the issuance of $4.3 million in outstanding but undrawn irrevocable standby letters of credit and $24.0 million of commitment reserves.
In connection with the closing of the Utica Sale, the ABL Facility was amended to, among other things, (i) permit the Utica Sale, (ii) amend the change of control provision and certain other provisions to permit certain structural changes in connection with a conversion to a C-corporation and (iii) amend the Interest Coverage Ratio (as defined in the ABL Agreement) covenant such that the Interest Coverage Ratio as of the last day of any fiscal quarter must be less than (a) for any fiscal quarter ending on or before December 31, 2024, (x) if no loans under the Credit Agreement are outstanding and unrestricted cash exceeds $200.0 million on such date, 1.50:1.00 and (y) if any loans under the Credit Agreement are outstanding or unrestricted cash is less than such threshold on such date, 1.75:1.00 and (b) for any fiscal quarter ending after December 31, 2024, 1.90:1.00.
The ABL Facility also requires that Summit Holdings not permit the First Lien Net Leverage Ratio (as defined in the ABL Agreement) as of the last day of any fiscal quarter to be greater than 2.50:1.00. The Partnership is in compliance with the financial covenants of the ABL Facility.
A portion of the proceeds from the Utica Sale were used to repay all amounts outstanding under the ABL Facility. As of June 30, 2024, there were no amounts outstanding under the ABL Facility.
For additional information, see Note 16 – Subsequent Events.
Permian Transmission Credit Facilities. On March 8, 2021, the Partnership’s unrestricted subsidiary, Summit Permian Transmission, entered into a Credit Agreement which allows for $175.0 million of senior secured credit facilities (the “Permian Transmission Credit Facilities”), including a $160.0 million Term Loan Facility and a $15.0 million working capital facility. The Permian Transmission Credit Facilities can be used to finance Summit Permian Transmission’s capital calls associated with its investment in Double E, debt service and other general corporate purposes. Unexpended proceeds from draws on the Permian Transmission Credit Facilities are classified as restricted cash on the accompanying unaudited condensed consolidated balance sheets.
As of June 30, 2024, the applicable margin under adjusted term SOFR borrowings was 2.475%, the average interest rate was 7.79% and the unused portion of the Permian Transmission Credit Facilities totaled $4.5 million, subject to a commitment fee of 0.7% after giving effect to the issuance of $10.5 million in outstanding but undrawn irrevocable standby letters of credit. Summit Permian Transmission, LLC entered into interest rate hedges with notional amounts representing approximately 90% of the Permian Term Loan facility at a fixed SOFR rate of 1.23%. The Partnership is in compliance with the financial covenants of the Permian Transmission Credit Facilities.
Permian Transmission Term Loan. In accordance with the terms of the Permian Transmission Credit Facilities, in January 2022, the Permian Term Loan Facility was converted into a Term Loan (the “Permian Transmission Term Loan”). The Permian Transmission Term Loan is due January 2028. As of June 30, 2024, the applicable margin under adjusted term SOFR borrowings was 2.475% and the average interest rate was 7.79%. The Partnership is in compliance with the financial covenants governing the Permian Transmission Term Loan.
In accordance with the terms of the Permian Transmission Term Loan, Summit Permian Transmission is required to make mandatory principal repayments. Below is a summary of the remaining mandatory principal repayments as of June 30, 2024:
(In thousands) Total 2024 2025 2026 2027 2028
Amortizing principal repayments $ 137,225 $ 7,903 $ 16,580 $ 16,967 $ 17,769 $ 78,006
2026 Secured Notes. In 2021, the Co-Issuers issued $700.0 million of 8.500% Senior Secured Second Lien Notes due 2026 to eligible purchasers pursuant to Rule 144A and Regulation S of the Securities Act, at a price of 98.5% of their face value. Additionally, in November 2022, in connection with the 2022 DJ Acquisitions, the Co-Issuers issued an additional $85.0 million of 2026 Secured Notes at a price of 99.26% of their face value. The 2026 Secured Notes will pay interest semi-annually on April 15 and October 15 of each year, commencing on April 15, 2022 and are jointly and severally guaranteed, on a senior second-priority secured basis (subject to permitted liens), by the Partnership and each restricted subsidiary of the Partnership (other than the Co-Issuers) that is an obligor under the ABL Agreement, or under the Co-Issuers’ 2025 Senior Notes on the issue date of the 2026 Secured Notes.
The 2026 Secured Notes are effectively subordinated to any of our or the guarantors’ current and future secured first lien indebtedness, including indebtedness incurred under the ABL Facility, to the extent of the value of the collateral securing such indebtedness, and our and the guarantors’ current and future debt that is secured by liens on assets other than the collateral, to the extent of the value of such assets. The 2026 Secured Notes are structurally subordinated to all indebtedness and other liabilities of our subsidiaries that do not guarantee the 2026 Secured Notes (including, but not limited to, the Permian Transmission Credit Facilities and the Subsidiary Series A Preferred Units). The 2026 Secured Notes are effectively equal to our and the guarantors’ obligations under any future second lien indebtedness and effectively senior to all of our future junior lien indebtedness and existing and future unsecured indebtedness, including our outstanding senior unsecured notes, to the
extent of the value of the collateral, and senior to any of our future subordinated indebtedness. The 2026 Secured Notes will mature on October 15, 2026.
On and after October 15, 2023, the Co-Issuers may redeem all or part of the 2026 Secured Notes at redemption prices (expressed as percentages of principal amount) equal to: (a) 104.250% for the twelve-month period beginning October 15, 2023; (b) 102.125% for the twelve-month period beginning October 15, 2024; and (c) 100.000% for the twelve-month period beginning on October 15, 2025 and at any time thereafter, in each case plus accrued and unpaid interest, if any, to, but not including the redemption date. The Partnership is in compliance with the covenants governing its 2026 Secured Notes.
Starting in the first quarter of 2023 with respect to the fiscal year ended 2022, and continuing annually through the fiscal year ended 2025, the Partnership is required under the terms of the 2026 Secured Notes Indenture to, if it has Excess Cash Flow (as defined in the 2026 Secured Notes Indenture), and subject to its ability to make such an offer under the ABL Facility, offer to purchase an amount of the 2026 Secured Notes, at 100% of the principal amount plus accrued and unpaid interest, equal to 100% of the Excess Cash Flow generated in the prior year. Excess Cash Flow is generally defined as consolidated cash flow minus the sum of capital expenditures and cash payments in respect of permitted investments and permitted restricted payments.
Generally, if the Partnership does not offer to purchase designated annual amounts of its 2026 Secured Notes or reduce its first lien capacity under the 2026 Secured Notes Indenture per annum from 2023 through 2025, the interest rate on the 2026 Secured Notes is subject to certain rate escalations. Per the terms of the 2026 Secured Notes Indenture, the designated amounts are to offer to purchase $50.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2023, otherwise the interest rate shall automatically increase by 50 basis points per annum; $100.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2024, otherwise the interest rate shall automatically increase by 100 basis points per annum (minus any amount previously increased); and $200.0 million aggregate principal amount of the 2026 Secured Notes by April 1, 2025, otherwise the interest rate shall automatically increase by 200 basis points per annum (minus any amount previously increased).
Based on the amount of our Excess Cash Flow for the fiscal year ended 2023, on March 27, 2024, the Partnership commenced a cash tender offer to purchase up to $19.3 million aggregate principal amount of the outstanding 2026 Secured Notes at 100% of the principal amount plus accrued and unpaid interest. The cash flow offer expired on April 24, 2024 with $13.6 million tendered and validly accepted and fully discharged as of June 30, 2024 (the “Excess Cash Flow Offer”).
As of April 1, 2024, the Partnership had not made offers to purchase in the required amount of $100.0 million and the interest rate on the 2026 Secured Notes increased an incremental 50 basis points to 9.50% effective on such date.
On May 7, 2024, the Co-Issuers commenced a cash tender offer to purchase up to $215.0 million of the outstanding 2026 Secured Notes (the “Asset Sale Offer”). The Asset Sale Offer expired on June 5, 2024 with $6.9 million of the 2026 Secured Notes tendered and validly accepted and fully discharged as of June 30, 2024.
To the extent the Partnership makes an offer to purchase, and the offer is not fully accepted by the holders of the 2026 Secured Notes, the Partnership may use any remaining amount not accepted for any purpose not prohibited by the 2026 Secured Notes Indenture or the ABL Facility.
For additional information, see Note 16 – Subsequent Events.
2026 Unsecured Notes. In November 2023, the Co-Issuers issued a total of $209.5 million aggregate principal amount of 2026 Unsecured Notes in exchange for $180.0 million aggregate principal amount of the 2025 Senior Notes and $29.5 million in cash. The cash raised was used to repurchase $29.7 million aggregate principal amount of the remaining 2025 Senior Notes that were not exchanged. The Partnership paid interest on the 2026 Unsecured Notes semi-annually in cash in arrears on April 15 and October 15 of each year.
On June 7, 2024, the Co-Issuers delivered a redemption notice with respect to all $209.5 million of the outstanding 2026 Unsecured Notes. On June 24, 2024, the 2026 Unsecured Notes were fully repaid and discharged. As of June 30, 2024, no amounts of the 2026 Unsecured Notes remained outstanding.
2025 Senior Notes. In February 2017, the Co-Issuers co-issued the 2025 Senior Notes. The Partnership pays interest on the 2025 Senior Notes semi-annually in cash in arrears on April 15 and October 15 of each year. The 2025 Senior Notes are senior, unsecured obligations and rank equally in right of payment with all of the Partnership’s existing and future senior obligations. The 2025 Senior Notes are effectively subordinated in right of payment to all of the Partnership’s secured indebtedness, to the extent of the collateral securing such indebtedness including indebtedness incurred under the ABL Facility and the 2026 Secured Notes.
The Co-Issuers have the right to redeem all or part of the 2025 Senior Notes at a redemption price of 100.00%, plus accrued and unpaid interest, if any, to, but not including the redemption date.
As discussed above, in November, 2023, the Partnership exchanged $180.0 million aggregate principal amount of the 2025 Senior Notes and repurchased $29.7 million aggregate principal amount of the remaining 2025 Senior Notes that were not exchanged.
The Partnership is in compliance with the covenants of the 2025 Senior Notes. The 2025 Senior Notes mature on April 15, 2025.
For additional information, see Note 16 – Subsequent Events.

v3.24.2.u1

FINANCIAL INSTRUMENTS
6 Months Ended

Jun. 30, 2024

Fair Value Disclosures [Abstract]

FINANCIAL INSTRUMENTS
9. FINANCIAL INSTRUMENTS
Fair Value. A summary of the estimated fair value of our debt financial instruments follows.
June 30, 2024 December 31, 2023
Carrying
Value (1)
Estimated
fair value
(Level 2)
Carrying
Value (1)
Estimated
fair value
(Level 2)
(In thousands)
2025 Senior Notes $ 49,783 $ 49,451 $ 49,783 $ 48,414
2026 Secured Notes $ 764,464 $ 785,818 $ 785,000 $ 778,131
2026 Unsecured Notes $ — $ — $ 209,510 $ 203,225
(1) Excludes applicable unamortized debt issuance costs and debt discounts.
The carrying values on the balance sheets of the ABL Facility and Permian Transmission Term Loan represent their fair value due to their floating interest rates. The fair values of the 2026 Unsecured Notes, 2026 Secured Notes and 2025 Senior Notes are based on an average of nonbinding broker quotes as of June 30, 2024 and December 31, 2023. The use of different market assumptions or valuation methodologies may have a material effect on their estimated fair value of the Senior Notes.
Deferred earn-out. The Partnership’s deferred earn-out liability was settled in full during the quarterly period ended June 30, 2024. As of December 31, 2023, the estimated fair value of the deferred earn-out liability was $5.1 million, and was estimated using a discounted cash flow technique based on estimated future freshwater deliveries and appropriate discount rates. Given the unobservable nature of the inputs, the fair value measurement of the deferred earn-out is deemed to use Level 3 inputs.
Interest Rate Swaps. In connection with the Permian Transmission Term Loan, the Partnership entered into amortizing interest rate swap agreements. As of June 30, 2024 and December 31, 2023, the outstanding notional amounts of interest rate swaps were $123.5 million and $130.4 million, respectively. These interest rate swaps manage exposure to variability in expected cash flows attributable to interest rate risk. Interest rate swaps convert a portion of the Partnership’s variable rate debt to fixed rate debt. The Partnership chooses counterparties for its derivative instruments that it believes are creditworthy at the time the transactions are entered into, and the Partnership actively monitors the creditworthiness where applicable. However, there can be no assurance that a counterparty will be able to meet its obligations to the Partnership. The Partnership presents its derivative positions on a gross basis and does not net the asset and liability positions.
As of June 30, 2024 and December 31, 2023, the Partnership’s interest rate swap agreements had a fair value of $12.8 million and $11.9 million, respectively, and are recorded within other noncurrent assets within the unaudited condensed consolidated balance sheets. The derivative instruments’ fair value are determined using level 2 inputs from the fair value hierarchy. For the three and six months ended June 30, 2024, the Partnership recorded a gain on interest rate swaps of $0.9 million and $3.5 million, respectively.

v3.24.2.u1

PARTNERS' CAPITAL AND MEZZANINE CAPITAL
6 Months Ended

Jun. 30, 2024

Equity [Abstract]

PARTNERS' CAPITAL AND MEZZANINE CAPITAL
10. PARTNERS' CAPITAL AND MEZZANINE CAPITAL
Common Units. An update on the number of common units is as follows for the period from December 31, 2023 to June 30, 2024.
Common Units
Units, December 31, 2023 10,376,189
Common units issued for SMLP LTIP, net
272,496
Units, June 30, 2024 10,648,685
Series A Preferred Units. As of June 30, 2024, the Partnership had 65,508 Series A Preferred Units outstanding and $39.6 million of accrued and unpaid distributions on its Series A Preferred Units.
Subsidiary Series A Preferred Units. The Partnership records its Subsidiary Series A Preferred Units at fair value upon issuance, net of issuance costs, and subsequently records an effective interest method accretion amount each reporting period to
accrete the carrying value to a most probable redemption value that is based on a predetermined internal rate of return measure. Net income (loss) attributable to common limited partners includes adjustments for PIK distributions and redemption accretion.
As of June 30, 2024, the Partnership had 93,039 Subsidiary Series A Preferred Units issued and outstanding.
If the Subsidiary Series A Preferred Units were redeemed on June 30, 2024, the redemption amount would be $128.8 million when considering the applicable multiple of invested capital metric and make-whole amount provisions contained in the Amended and Restated Limited Liability Company Agreement of Permian Holdco.
The following table shows the change in the Partnership’s Subsidiary Series A Preferred Unit balance from January 1, 2024 to June 30, 2024, net of $1.4 million and $1.7 million of unamortized issuance costs at June 30, 2024 and December 31, 2023, respectively:
(In thousands)
Balance at December 31, 2023 $ 124,652
Redemption accretion, net of issuance cost amortization
7,636
Cash distribution (includes a $1.6 million distribution payable as of June 30, 2024)
(3,256)
Balance at June 30, 2024 $ 129,032
Cash Distribution Policy. The Partnership suspended its cash distributions to holders of its common units and Series A Preferred Units, commencing with respect to the quarter ended March 31, 2020. Upon the resumption of distributions, the Partnership Agreement would have required that it distribute all available cash, subject to reserves established by its General Partner, within 45 days after the end of each quarter to unitholders of record on the applicable record date. The amount of distributions paid under this policy was subject to fluctuations based on the amount of cash the Partnership generated from its business and the decision to make any distribution was determined by the General Partner, taking into consideration the terms of the Partnership Agreement. There were no distributions paid during the three and six months ended June 30, 2024 or during the twelve months ended December 31, 2023. In connection with the consummation of the Corporate Reorganization (as defined herein), the Partnership Agreement was amended to, among other things, reflect that all of the issued and outstanding limited partnership interests of the Partnership are held by Summit Midstream Corporation. For information on the Corporate Reorganization, see Note 16 – Subsequent Events.

v3.24.2.u1

EARNINGS PER UNIT
6 Months Ended

Jun. 30, 2024

Earnings Per Share [Abstract]

EARNINGS PER UNIT
11. EARNINGS PER UNIT
The following table details the components of EPU.
Three Months Ended June 30, Six Months Ended June 30,
2024 2023 2024 2023
(In thousands, except per-unit amounts)
Numerator for basic and diluted EPU:
Allocation of net loss among limited partner interests:
Net income (loss)
$ (23,778) $ (13,540) $ 109,149 $ (27,703)
Less: Net income attributable to Subsidiary Series A Preferred Units
(3,866) (3,496) (7,636) (5,242)
Net income (loss) attributable to Summit Midstream Partners, LP $ (27,644) $ (17,036) $ 101,513 $ (32,945)
Less: Net income attributable to Series A Preferred Units $ (3,313) $ (2,799) $ (6,533) $ (5,438)
Net income (loss) attributable to common limited partners $ (30,957) $ (19,835) $ 94,980 $ (38,383)
Denominator for basic and diluted EPU:
Weighted-average common units outstanding – basic 10,649 10,369 10,549 10,291
Effect of nonvested phantom units — — 532 —
Weighted-average common units outstanding – diluted
10,649 10,369 11,081 10,291
Net income (loss) per limited partner unit:
Common unit – basic
$ (2.91) $ (1.91) $ 9.00 $ (3.73)
Common unit – diluted
$ (2.91) $ (1.91) $ 8.57 $ (3.73)
Nonvested anti-dilutive phantom units excluded from the calculation of diluted EPU
— 217 19 251

v3.24.2.u1

SUPPLEMENTAL CASH FLOW INFORMATION
6 Months Ended

Jun. 30, 2024

Supplemental Cash Flow Elements [Abstract]

SUPPLEMENTAL CASH FLOW INFORMATION
12. SUPPLEMENTAL CASH FLOW INFORMATION
Six Months Ended June 30,
2024 2023
(In thousands)
Supplemental cash flow information:
Cash interest paid $ 65,807 $ 62,587
Cash paid for taxes $ 15 $ 15
Noncash investing and financing activities:
Capital expenditures in trade accounts payable (period-end accruals) $ 8,999 $ 8,399
Accretion of Subsidiary Series A Preferred Units, net of issuance cost amortization $ 7,636 $ 5,242

v3.24.2.u1

UNIT-BASED AND NONCASH COMPENSATION
6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement [Abstract]

UNIT-BASED AND NONCASH COMPENSATION
13. UNIT-BASED AND NONCASH COMPENSATION
SMLP Long-Term Incentive Plan. The Partnership’s 2022 Long-Term Incentive Plan (“SMLP LTIP”) provides for equity awards to eligible officers, employees, consultants and directors of the Partnership, thereby linking the recipients’ compensation directly to SMLP’s performance. Significant items to note:
•For the six-month period ended June 30, 2024, the Partnership granted 230,815 time-based phantom units and associated distribution equivalent rights to employees in connection with the Partnership’s annual incentive compensation award cycle. The grant date fair value of these awards totaled $3.7 million and the awards vest ratably over a 3-year period.
•For the six-month period ended June 30, 2024, the Partnership granted 122,867 performance-based phantom units and associated distribution equivalent rights to certain members of management in connection with the Partnership’s annual incentive compensation award cycle. The grant date fair value of these awards totaled $2.4 million and the awards vest at the end of three years.
•For the six-month period ended June 30, 2024, the Partnership issued 39,486 common units to the Partnership’s six independent directors in connection with their annual compensation plan. The grant date fair value of these awards totaled $0.6 million and became fully vested at the grant date.
•On May 16, 2024, the Board of Directors of the Partnership approved the First Amendment to the SMLP LTIP, which increased the number of common units that may be delivered with respect to awards granted under the SMLP LTIP by 750,000 common units. As of June 30, 2024, approximately 0.9 million common units remained available for future issuance under the SMLP LTIP, which includes the impact of 0.7 million granted but unvested phantom units.

v3.24.2.u1

COMMITMENTS AND CONTINGENCIES
6 Months Ended

Jun. 30, 2024

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES
14. COMMITMENTS AND CONTINGENCIES
Environmental Matters. Although the Partnership believes that it is in material compliance with applicable environmental regulations, the risk of environmental remediation costs and liabilities are inherent in pipeline ownership and operation. Furthermore, the Partnership can provide no assurances that significant environmental remediation costs and liabilities will not be incurred in the future. The Partnership is currently not aware of any material contingent liabilities that exist with respect to environmental matters, except as noted below.
As of June 30, 2024, the Partnership has recognized (i) a current liability for remediation effort expenditures expected to be incurred within the next 12 months and (ii) a noncurrent liability for estimated remediation expenditures expected to be incurred subsequent to June 30, 2025. Each of these amounts represent the Partnership’s best estimate for costs expected to be incurred. Neither of these amounts have been discounted to their present value.
An update of the Partnership’s undiscounted accrued environmental remediation is as follows and is primarily related to the 2015 Blacktail Release and other environmental remediation activities, as detailed below.
(In thousands)
Accrued environmental remediation, December 31, 2023 $ 2,937
Payments made
(598)
Changes in estimates
623
Accrued environmental remediation, June 30, 2024 $ 2,962
In 2015, the Partnership learned of the rupture of a four-inch produced water gathering pipeline on the Meadowlark Midstream system near Williston, North Dakota (“2015 Blacktail Release”). On August 4, 2021, subsidiaries of the Partnership entered into the following agreements to resolve the U.S. federal and North Dakota state governments’ environmental claims with respect to the 2015 Blacktail Release: (i) a Consent Decree with the U.S. Department of Justice (“DOJ”), the U.S. Environmental Protection Agency (“EPA”), and the State of North Dakota (“Consent Decree”); (ii) a Plea Agreement with the United States (“Plea Agreement”); and (iii) a Consent Agreement with the North Dakota Industrial Commission (“Consent Agreement” together with the Consent Decree and Plea Agreement, the “Global Settlement”). As of June 30, 2024 and December 31, 2023, the accrued loss liability for the 2015 Blacktail Release was $21.7 million and are recorded within Other noncurrent liabilities and Accrued settlement payable within the unaudited condensed consolidated balance sheets.
Key terms of the Global Settlement included (i) payment of penalties and fines totaling $36.3 million, consisting of $1.25 million in natural resource damages payable to federal and state governments, $25.0 million payable to the federal government over 5 years, and $10.0 million payable to state governments over, for the federal and state civil amounts, six years and, for the federal criminal amounts, five years, with interest applied to unpaid amounts accruing at, for the federal and state civil amounts, a fixed rate of 3.25% and, for the federal criminal amounts, a variable rate set by statute, and of which
$6.7 million is expected to be paid within the next twelve months; (ii) continuation of remediation efforts at the site of the 2015 Blacktail Release; (iii) other injunctive relief, including, but not limited to, control room management, environmental management system audit, training, and reporting; (iv) guilty pleas by defendant Summit Midstream Partners, LLC (the “Defendant”) for (a) one charge of negligent discharge of a harmful quantity of oil and (b) one charge of knowing failure to immediately report a discharge of oil; and (v) organizational probation for a minimum period of three years from sentencing on December 6, 2021, including payment in full of certain components of the fines and penalty amounts. The agreements comprising the Global Settlement were subject to the approval of the U.S. District Court for the District of North Dakota (the “U.S. District Court”). The U.S. District Court entered an order making the civil components of the Global Settlement effective on September 28, 2021 and accepted the sentencing in the Plea Agreement on December 6, 2021, completing approval of the Global Settlement.
Subsidiaries of the Partnership are also participating in two proceedings before the EPA as a result of the Plea Agreement becoming effective. Following the U.S. District Court’s entering judgment on Defendant subsidiary’s guilty plea to one count of negligent discharge of produced water in violation of the Clean Water Act, Defendant subsidiary was statutorily debarred by operation of law pursuant to 33 U.S.C. § 1368(a) to participate in federal awards performed at the “violating facility,” which EPA determined to be the Marmon subsystem of the produced water gathering system in North Dakota. The scope and effect of the debarment as defined do not materially affect our operations. Defendant has submitted a petition for reinstatement, which was denied by the EPA’s suspension and debarment office (“SDO”) on July 11, 2022. The SDO determined that the term of probation in the Plea Agreement was the appropriate period of time to demonstrate Defendant subsidiary’s change of corporate attitude, policies, practices, and procedures. The Partnership and certain subsidiaries have also received a show cause notice from the EPA requesting us to “show cause” why SDO should not issue a Notice of Proposed Debarment to the Defendant subsidiary and certain affiliates under 2 C.F.R. § 180.800(d), to which the Partnership has responded, and in which proceeding no further developments have occurred.
Legal Proceedings. The Partnership is involved in various litigation and administrative proceedings arising in the ordinary course of business. In the opinion of management, any liabilities, which include insured claims, would not individually or in the aggregate have a material adverse effect on the Partnership's financial position or results of operations.

v3.24.2.u1

SEGMENT INFORMATION
6 Months Ended

Jun. 30, 2024

Segment Reporting [Abstract]

SEGMENT INFORMATION
15. SEGMENT INFORMATION
As of June 30, 2024, the Partnership’s reportable segments are:
•Rockies – Includes the Partnership’s wholly owned midstream assets located in the Williston Basin and the DJ Basin.
•Permian – Includes the Partnership’s equity method investment in Double E.
•Northeast – Includes the operations of the Partnership’s wholly owned midstream assets located in the Marcellus shale play and its wholly owned midstream assets located in the Utica shale play together with its equity method investment in Ohio Gathering that is focused on the Utica Shale. For additional information regarding the Utica Sale and Mountaineer Transaction, see Note 3 - Divestitures regarding the disposition of Northeast assets.
•Piceance – Includes the Partnership’s wholly owned midstream assets located in the Piceance Basin.
•Barnett – Includes the Partnership’s wholly owned midstream assets located in the Barnett Shale.
Corporate and Other represents those results that: (i) are not specifically attributable to a reportable segment; (ii) are not individually reportable; or (iii) have not been allocated to our reportable segments, including certain general and administrative expense items, transaction costs, acquisition integration costs and interest expense.
Assets by reportable segment follow.
June 30, 2024 December 31, 2023
(In thousands)
Assets:
Rockies $ 905,649 $ 904,974
Permian 289,168 291,073
Northeast 2,343 573,663
Piceance 407,191 431,687
Barnett 272,090 281,861
Total reportable segment assets
1,876,441 2,483,258
Corporate and Other 156,497 10,940
Total assets
$ 2,032,938 $ 2,494,198
Segment adjusted EBITDA by reportable segment follows.
Three Months Ended June 30, Six Months Ended June 30,
2024 2023 2024 2023
(In thousands)
Reportable segment adjusted EBITDA(1)
Rockies $ 22,858 $ 16,858 $ 45,732 $ 39,988
Permian 7,697 5,370 14,962 10,443
Northeast 1,613 20,201 30,634 38,055
Piceance 12,848 14,365 28,081 28,348
Barnett 5,420 7,269 10,520 14,296
Total of reportable segments' measures of profit
$ 50,436 $ 64,063 $ 129,929 $ 131,130
(1) Segment adjusted EBITDA is a non-GAAP financial measure. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations - Results of Operations” for additional information.
A reconciliation of income or loss before income taxes and income from equity method investees to total of reportable segments' measures of profit follows.
Three Months Ended June 30, Six Months Ended June 30,
2024 2023 2024 2023
(In thousands)
Reconciliation of loss before income taxes and income from equity method investees to total of reportable segments' measures of profit:
Income (loss) before income taxes and income from equity method investees
$ (28,712) $ (20,722) $ 93,787 $ (40,046)
Add:
Corporate and Other expense
4,391 3,606 11,397 13,069
Interest expense
31,457 35,175 69,303 69,398
Depreciation and amortization (1)
24,152 30,366 52,254 60,425
Proportional adjusted EBITDA for equity method investees (2)
6,842 14,100 27,517 25,738
Adjustments related to capital reimbursement activity
(2,728) (2,481) (5,651) (3,667)
Unit-based and noncash compensation
2,086 1,833 4,858 3,762
(Gain) loss on asset sales, net 34 (75) 7 (143)
(Gain) loss on sale of business 2,192 54 (84,010) 36
Gain on sale of Ohio Gathering — — (126,261) —
Long-lived asset impairment
20 455 67,936 455
Transaction costs and other
5,738 1,752 13,828 2,103
Early extinguishment of debt
4,964 — 4,964 —
Total of reportable segments' measures of profit
$ 50,436 $ 64,063 $ 129,929 $ 131,130
________
(1) Includes the amortization expense associated with our favorable gas gathering contracts as reported in other revenues.
(2) The Partnership records financial results of its investment in Ohio Gathering on a one-month lag and is based on the financial information available to us during the reporting period. With the divestiture of Ohio Gathering in March 2024, proportional adjusted EBITDA includes financial results from December 1, 2023 through March 22, 2024.

v3.24.2.u1

SUBSEQUENT EVENTS
6 Months Ended

Jun. 30, 2024

Subsequent Events [Abstract]

SUBSEQUENT EVENTS
16. SUBSEQUENT EVENTS
Corporate Reorganization. On August 1, 2024, following unitholder approval at the Partnership’s Special Meeting of Unitholders on July 18, 2024, the Partnership consummated a previously announced transaction that resulted in the Partnership becoming a wholly owned subsidiary of a newly formed Delaware corporation, Summit Midstream Corporation (the “Corporate Reorganization”). Upon the consummation of the Corporate Reorganization, each outstanding common unit of the Partnership was converted into the right to receive 1.000 shares of common stock of Summit Midstream Corporation and each outstanding Series A Preferred Unit was converted into the right to receive 1.000 shares of Series A Floating Rate Cumulative Redeemable Perpetual Preferred Stock (“Series A Preferred Stock”) of Summit Midstream Corporation, with the liquidation preference of each share of Series A Preferred Stock initially equal to $1,000 and the Certificate of Designation of Series A Floating Rate Cumulative Redeemable Perpetual Preferred Stock of Summit Midstream Corporation (the “Series A Certificate of Designation”) deeming all accumulated and unpaid distributions on the Series A Preferred Units to be Series A Unpaid Cash Dividends (as defined in the Series A Certificate of Designation) per share of Series A Preferred Stock, which constituted all consideration to be paid in respect to such Series A Preferred Units, and any rights to accumulated and unpaid distributions on such Series A Preferred Units were discharged.
Refinancing Transactions.
2029 Notes. On July 26, 2024, Summit Holdings issued $575.0 million aggregate principal amount of 8.625% Senior Secured Second Lien Notes due 2029 (the “2029 Notes”). The 2029 Notes are guaranteed on a senior second-priority basis by Summit Midstream Corporation and certain of Summit Midstream Corporation’s existing and future subsidiaries and are secured on a second-priority basis by substantially the same collateral that is pledged for the benefit of the lenders under the Amended and
Restated ABL Facility (as defined below). The 2029 Notes mature on October 31, 2029 and have interest payable semi-annually in arrears on each February 15 and August 15, commencing on February 15, 2025.
At any time prior to July 31, 2026, Summit Holdings may on any one or more occasions redeem up to 40% of the aggregate principal amount of the 2029 Notes at a redemption rate of 108.625% of the principal amount plus accrued and unpaid interest, if any, to, but not including, the redemption date, in an amount not greater than the net cash proceeds of one or more equity offerings. At any time before July 31, 2026, Summit Holdings may also redeem the 2029 Notes, in whole or in part, at a price equal to 100% of their principal amount, plus a make-whole premium, together with accrued and unpaid interest to, but not including, the redemption date. Thereafter, Summit Holdings may redeem all or a portion of the 2029 Notes in whole at any time or in part from time to time at the following redemption prices (expressed as percentages of the principal amount) plus accrued and unpaid interest if redeemed during the periods indicated below:
Period Redemption Price
July 31, 2026 to July 30, 2027
104.313 %
July 31, 2027 to July 30, 2028
102.156 %
July 31, 2028 and thereafter
100.000 %
2026 Secured Notes Tender Offer and Redemption. On July 26, 2024, concurrently with closing the offering of 2029 Notes, Summit Holdings and Finance Corp. consummated a cash tender offer to purchase any and all of the outstanding 2026 Secured Notes (the “2026 Secured Notes Tender Offer”). Summit Holdings and Finance Corp. accepted for payment and made payment for $649.8 million aggregate principal amount of the 2026 Secured Notes validly tendered in the 2026 Secured Notes Tender Offer. On July 26, 2024, concurrently with consummation of the 2026 Secured Notes Tender Offer, Summit Holdings and Finance Corp. delivered notice of redemption to holders of 2026 Secured Notes for the redemption of all $114.7 million aggregate principal amount of 2026 Secured Notes not purchased in the 2026 Secured Notes Tender Offer, at a price equal to 102.125% of the principal amount thereof, plus accrued and unpaid interest to the redemption date (which is expected to be October 15, 2024). On July 26, 2024, concurrently with delivery of notice of redemption, Summit Holdings and Finance Corp. irrevocably deposited $121.2 million in aggregate principal amount of non-callable United States Treasury securities, which includes amounts for principal, interest, and premium with the trustee to satisfy and discharge the 2026 Secured Notes until redeemed on October 15, 2024 with the funds deposited with the trustee.
2025 Senior Notes Redemption. On July 17, 2024, Summit Holdings and Finance Corp. delivered conditional notice of redemption to holders of 2025 Senior Notes for the redemption of all $49.8 million aggregate principal amount of outstanding 2025 Senior Notes, at a price equal to 100.000% of the principal amount thereof, plus accrued and unpaid interest to the redemption date, conditioned on closing of the offering of 2029 Notes. On July 26, 2024, concurrently with closing of the offering of 2029 Notes, Summit Holdings and Finance Corp. irrevocably deposited $50.6 million in aggregate principal amount of non-callable United States Treasury securities, which includes amounts for principal and interest with the trustee to satisfy and discharge the 2025 Senior Notes until redeemed with the funds deposited with the trustee.
Amended and Restated ABL Facility. Concurrently with the issuance of the 2029 Notes, on July 26, 2024, Summit Holdings, as borrower, amended and restated its existing first-lien, senior secured credit agreement, with the Partnership, the subsidiaries party thereto, Bank of America, N.A., as agent, and the several lenders and other agents party thereto, consisting of a $500.0 million asset-based revolving credit facility (the “Amended and Restated ABL Facility”), subject to a borrowing base comprised of a percentage of eligible accounts receivable of Summit Holdings and its subsidiaries that guarantee the Amended and Restated ABL Facility (collectively, the “Amended and Restated ABL Facility Subsidiary Guarantors”) and a percentage of eligible above-ground fixed assets including eligible compression units, processing plants, compression stations and related equipment of Summit Holdings and the Amended and Restated ABL Facility Subsidiary Guarantors.
Summit Holdings amended and restated its existing ABL Facility pursuant to that certain Amended and Restated Loan and Security Agreement (the “New ABL Agreement”), dated as of July 26, 2024.
The Amended and Restated ABL Facility will mature on the earliest of (a) July 26, 2029, (b) July 31, 2029 if either (i) the outstanding amount of the 2029 Notes (or any refinancing debt permitted under the Amended and Restated ABL Facility in respect thereof that has a final maturity date, scheduled amortization or any other scheduled repayment, mandatory prepayment, mandatory redemption or sinking fund obligation prior to the date that is 91 days after the Amended and Restated ABL Termination Date (as defined below) (provided, that the terms of such permitted refinancing debt may (x) require the payment of interest from time to time and (y) include customary mandatory redemptions, prepayments or offers to purchase with proceeds of asset sales or upon the occurrence of a change of control)) on such date equals or exceeds $50.0 million or (ii) the outstanding amount of such debt described in clause (i) above on such date is less than $50.0 million and Liquidity (as defined in the New ABL Agreement) at any time on or after such date is less than the sum of (A) such outstanding amount and (B) the greater of (x) 10% of the aggregate Commitments (as defined in the New ABL Agreement) then in effect and (y) $50.0 million (and, for the avoidance of doubt, once the Amended and Restated ABL Termination Date occurs it may not be unwound as a
result of Liquidity increasing on a subsequent date), and (c) any date on which the aggregate Commitments terminate thereunder (such date, the “Amended and Restated ABL Termination Date”).
Borrowings under the Amended and Restated ABL Facility will bear interest, at the election of Summit Holdings, at a SOFR-based rate or a base rate, in each case, plus an applicable borrowing margin based on our Total Net Leverage Ratio (as defined in the New ABL Agreement consistent with the ABL Facility). The applicable margin for base rate loans will vary from 1.50% to 2.25% and the applicable margin for SOFR-based loans will vary from 2.50% to 3.25%, in each case, depending on our Total Net Leverage Ratio.
The Amended and Restated ABL Facility (together with certain Secured Bank Product Obligations (as defined in the New ABL Agreement)) will be jointly and severally guaranteed, on a senior first-priority secured basis (subject to permitted liens), by the Partnership, Summit Holdings and each of the Amended and Restated ABL Facility Subsidiary Guarantors.
The Amended and Restated ABL Facility restricts, among other things, Summit Holdings’ and its Restricted Subsidiaries’ (as defined in the New ABL Agreement) ability and the ability of certain of their subsidiaries to: (i) incur additional debt or issue preferred stock; (ii) make distributions or repurchase equity; (iii) make payments on or redeem junior lien, unsecured or subordinated indebtedness; (iv) create liens or other encumbrances; (v) make investments, loans or other guarantees; (vi) engage in transactions with affiliates; and (viii) make acquisitions or merge or consolidate with another entity. These covenants are subject both to a number of important exceptions and qualifications.
The Amended and Restated ABL Facility requires that Summit Holdings not permit (i) the First Lien Net Leverage Ratio (as defined in the New ABL Agreement) as of the last day of any fiscal quarter to be greater than 2.50:1.00, or (ii) the Interest Coverage Ratio (as defined in the New ABL Agreement) as of the last day of any fiscal quarter to be less than 2.00:1.00.
The Amended and Restated ABL Facility contains certain events of default customary for instruments of this type. In the case of an event of default arising from certain events of bankruptcy, insolvency or reorganization with respect to Summit Holdings, all outstanding Obligations (as defined in the New ABL Agreement) will become due and payable immediately without further action or notice and all commitments under the Amended and Restated ABL Facility will terminate.
Pursuant to the New ABL Agreement, the Obligations (as defined in the New ABL Agreement) are (or, subject to post-closing periods for certain types of collateral, will be) generally secured by a first priority lien on and security interest in (subject to permitted liens), subject to certain exclusions and limitations set forth in the New ABL Agreement, (i) substantially all of the personal property of Summit Holdings and the Amended and Restated ABL Facility Subsidiary Guarantors, (ii) all equity interests in Summit Holdings and certain other entities, all debt securities and certain rights related to the foregoing, in each case, owned by the Partnership, (iii) Closing Date Gathering Station Real Property and Closing Date Pipeline Systems Real Property (each, as defined in the New ABL Agreement) and certain other material real property interests (including improvements thereon) of Summit Holdings and the Amended and Restated ABL Facility Subsidiary Guarantors as provided in the New ABL Agreement and (iv) all proceeds of the foregoing collateral.
Intercreditor Agreement. On November 2, 2021, Summit Holdings and the other guarantors party thereto entered into an Intercreditor Agreement (as amended, restated, supplemented or otherwise modified, the “Intercreditor Agreement”) with Bank of America, N.A., as first lien representative and collateral agent for the initial first lien claimholders, and Regions Bank, as initial second lien representative for the initial second lien claimholders and collateral agent for the initial second lien claimholders, which was reaffirmed by Bank of America, N.A., in connection with its entry into the Amended and Restated ABL Facility, and which Regions Bank joined as an additional second lien representative for the additional second lien claimholders and additional second lien collateral agent for the additional second lien claimholders, in each case, substantially concurrently with the entry into the Amended and Restated ABL Facility. The Intercreditor Agreement establishes (i) a first-priority lien (subject to permitted liens) status for the liens on the collateral securing the ABL Facility (and will apply to the Amended and Restated ABL Facility) and any additional first-lien indebtedness and (ii) a junior priority lien (subject to permitted liens) status for the liens on the collateral securing the 2026 Secured Notes and any additional second-lien indebtedness (including the 2029 Notes).

v3.24.2.u1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP (Policies)
6 Months Ended

Jun. 30, 2024

Accounting Policies [Abstract]

Basis of Presentation The Partnership prepares its condensed consolidated financial statements in accordance with GAAP as established by the FASB and pursuant to the rules and regulations of the SEC pertaining to interim financial information. The unaudited condensed consolidated financial statements contained in this report include all normal and recurring material adjustments that, in the opinion of management, are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods presented herein.

Use of Estimates
The Partnership makes estimates and assumptions that affect the reported amounts of assets and liabilities at the balance sheet dates, including fair value measurements, the reported amounts of revenues and expenses and the disclosure of commitments and contingencies. Although management believes these estimates are reasonable, actual results could differ from its estimates.

Consolidation
The unaudited condensed consolidated financial statements include the assets, liabilities and results of operations of SMLP and its subsidiaries. All intercompany transactions among the consolidated entities have been eliminated in consolidation. Comprehensive income or loss is the same as net income or loss for all periods presented.

Accounting standards recently implemented and New accounting standards not yet implemented
Accounting standards recently implemented. ASU No. 2020-06 Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815–40) (“ASU 2020-06”). ASU 2020-06 simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity. The ASU is part of the FASB’s simplification initiative, which aims to reduce unnecessary complexity in GAAP. The ASU’s amendments are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. The provisions of ASU 2020-06 did not have a material impact on the Partnership’s condensed consolidated financial statements and disclosures.
New accounting standards not yet implemented. ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). ASU 2023-07 enhances disclosures on reportable segments and provides additional detailed information about significant segment expenses. The guidance in ASU 2023-07 is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The Partnership continues to assess the impact of the new guidance, but does not expect the provisions of ASU 2023-07 will have a material impact on its consolidated financial statements and disclosures.

v3.24.2.u1

REVENUE (Tables)
6 Months Ended

Jun. 30, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Estimated Revenue Expected to be Recognized and MVC Shortfall Payments
The following table presents estimated revenue, as of June 30, 2024, expected to be recognized during the remainder of 2024 and over the remaining contract period related to performance obligations that are unsatisfied and are comprised of estimated MVC shortfall payments.
(In thousands) 2024 2025 2026 2027 2028 Thereafter
Gathering services and related fees $ 23,926 $ 37,249 $ 26,112 $ 7,685 $ 5,137 $ —

Schedule of Disaggregated Revenue by Geographic Area and Major Products and Services Reportable Segments
Revenue by category. In the following tables, revenue is disaggregated by geographic area and major products and services. For more detailed information about reportable segments, see Note 15 – Segment Information.
Three Months Ended June 30, 2024
Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total
(In thousands)
Reportable Segments:
Northeast $ 1,998 $ — $ — $ 1,998
Rockies 16,323 47,214 3,321 66,858
Permian — — 911 911
Piceance 18,063 666 1,234 19,963
Barnett 8,829 79 2,026 10,934
Total reportable segments 45,213 47,959 7,492 100,664
Corporate and other — — 651 651
Total $ 45,213 $ 47,959 $ 8,143 $ 101,315
Six Months Ended June 30, 2024
Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total
(In thousands)
Reportable Segments:
Northeast $ 18,851 $ — $ — $ 18,851
Rockies 32,839 95,184 7,429 135,452
Permian — — 1,821 1,821
Piceance 38,450 1,614 2,479 42,543
Barnett 17,058 253 3,483 20,794
Total reportable segments 107,198 97,051 15,212 219,461
Corporate and other — — 725 725
Total $ 107,198 $ 97,051 $ 15,937 $ 220,186
Three Months Ended June 30, 2023
Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total
(In thousands)
Reportable Segments:
Northeast $ 12,805 $ — $ — $ 12,805
Rockies 14,909 34,575 725 50,209
Permian — — 892 892
Piceance 20,014 1,335 1,373 22,722
Barnett 9,358 172 1,736 11,266
Total reportable segments 57,086 36,082 4,726 97,894
Corporate and other — — (1) (1)
Total $ 57,086 $ 36,082 $ 4,725 $ 97,893
Six Months Ended June 30, 2023
Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total
(In thousands)
Reportable Segments:
Northeast $ 25,560 $ — $ — $ 25,560
Rockies 30,212 81,904 3,344 115,460
Permian — — 1,785 1,785
Piceance 39,133 2,976 2,799 44,908
Barnett 19,552 365 2,800 22,717
Total reportable segments 114,457 85,245 10,728 210,430
Corporate and other — — (38) (38)
Total $ 114,457 $ 85,245 $ 10,690 $ 210,392

v3.24.2.u1

PROPERTY, PLANT AND EQUIPMENT (Tables)
6 Months Ended

Jun. 30, 2024

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment
Details on the Partnership’s property, plant and equipment follow.
June 30, 2024 December 31, 2023
(In thousands)
Gathering and processing systems and related equipment $ 1,932,418 $ 2,335,980
Construction in progress 42,338 56,064
Land and line fill 11,534 11,534
Other 64,834 65,029
Total
2,051,124 2,468,607
Less: accumulated depreciation (684,602) (770,022)
Property, plant and equipment, net
$ 1,366,522 $ 1,698,585

Schedule Of Depreciation Expense And Capitalized Interest Costs
Depreciation expense and capitalized interest for the Partnership follow.
Three Months Ended June 30, Six Months Ended June 30,
2024 2023 2024 2023
(In thousands) (In thousands)
Depreciation expense $ 20,357 $ 23,285 $ 43,928 $ 46,204
Capitalized interest 175 246 647 439

v3.24.2.u1

EQUITY METHOD INVESTMENTS (Tables)
6 Months Ended

Jun. 30, 2024

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Equity Method Investments
Details of the Partnership’s equity method investments follow.
June 30, 2024 December 31, 2023
(In thousands)
Double E $ 271,622 $ 276,221
Ohio Gathering — 210,213
Total $ 271,622 $ 486,434

v3.24.2.u1

DEFERRED REVENUE (Tables)
6 Months Ended

Jun. 30, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Contract with Customer, Contract Asset, Contract Liability, and Receivable An update of current deferred revenue follows.
Total
(In thousands)
Current deferred revenue, December 31, 2023 $ 10,196
Add: additions
3,830
Less: revenue recognized and other
(5,721)
Current deferred revenue, June 30, 2024 $ 8,305
An update of noncurrent deferred revenue follows.
Total
(In thousands)
Noncurrent deferred revenue, December 31, 2023 $ 30,085
Add: additions
3,378
Less: reclassification to current deferred revenue and other
(3,967)
Noncurrent deferred revenue, June 30, 2024 $ 29,496

v3.24.2.u1

DEBT (Tables)
6 Months Ended

Jun. 30, 2024

Debt Disclosure [Abstract]

Schedule of Debt
Debt for the Partnership at June 30, 2024 and December 31, 2023, follows:
June 30, 2024 December 31, 2023
(In thousands)
ABL Facility: Summit Holdings' asset based credit facility due May 1, 2026
$ — $ 313,000
Permian Transmission Term Loan: Summit Permian Transmission's variable rate senior secured term loan due January 2028
137,225 144,846
2026 Unsecured Notes: 12.00% senior unsecured notes due October 15, 2026
— 209,510
2025 Senior Notes: 5.75% senior unsecured notes due April 15, 2025
49,783 49,783
2026 Secured Notes: 8.50% senior second lien notes due October 15, 2026
764,464 785,000
Less: unamortized debt discount and debt issuance costs (24,088) (31,449)
Total debt, net of unamortized debt discount and debt issuance costs 927,384 1,470,690
Less: current portion of Permian Transmission Term Loan and 2025 Senior Notes redemption
(65,708) (15,524)
Total long-term debt $ 861,676 $ 1,455,166

Schedule of Maturities of Long-term Debt Below is a summary of the remaining mandatory principal repayments as of June 30, 2024:
(In thousands) Total 2024 2025 2026 2027 2028
Amortizing principal repayments $ 137,225 $ 7,903 $ 16,580 $ 16,967 $ 17,769 $ 78,006

v3.24.2.u1

FINANCIAL INSTRUMENTS (Tables)
6 Months Ended

Jun. 30, 2024

Fair Value Disclosures [Abstract]

Schedule of Carrying and Estimated Fair Values of Debt Instruments A summary of the estimated fair value of our debt financial instruments follows.
June 30, 2024 December 31, 2023
Carrying
Value (1)
Estimated
fair value
(Level 2)
Carrying
Value (1)
Estimated
fair value
(Level 2)
(In thousands)
2025 Senior Notes $ 49,783 $ 49,451 $ 49,783 $ 48,414
2026 Secured Notes $ 764,464 $ 785,818 $ 785,000 $ 778,131
2026 Unsecured Notes $ — $ — $ 209,510 $ 203,225
(1) Excludes applicable unamortized debt issuance costs and debt discounts.

v3.24.2.u1

PARTNERS' CAPITAL AND MEZZANINE CAPITAL (Tables)
6 Months Ended

Jun. 30, 2024

Equity [Abstract]

Schedule Of Partner Units Activity An update on the number of common units is as follows for the period from December 31, 2023 to June 30, 2024.
Common Units
Units, December 31, 2023 10,376,189
Common units issued for SMLP LTIP, net
272,496
Units, June 30, 2024 10,648,685

Schedule of Consolidation, Parent Ownership Interest, Effects of Changes, Net
The following table shows the change in the Partnership’s Subsidiary Series A Preferred Unit balance from January 1, 2024 to June 30, 2024, net of $1.4 million and $1.7 million of unamortized issuance costs at June 30, 2024 and December 31, 2023, respectively:
(In thousands)
Balance at December 31, 2023 $ 124,652
Redemption accretion, net of issuance cost amortization
7,636
Cash distribution (includes a $1.6 million distribution payable as of June 30, 2024)
(3,256)
Balance at June 30, 2024 $ 129,032

v3.24.2.u1

EARNINGS PER UNIT (Tables)
6 Months Ended

Jun. 30, 2024

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted
The following table details the components of EPU.
Three Months Ended June 30, Six Months Ended June 30,
2024 2023 2024 2023
(In thousands, except per-unit amounts)
Numerator for basic and diluted EPU:
Allocation of net loss among limited partner interests:
Net income (loss)
$ (23,778) $ (13,540) $ 109,149 $ (27,703)
Less: Net income attributable to Subsidiary Series A Preferred Units
(3,866) (3,496) (7,636) (5,242)
Net income (loss) attributable to Summit Midstream Partners, LP $ (27,644) $ (17,036) $ 101,513 $ (32,945)
Less: Net income attributable to Series A Preferred Units $ (3,313) $ (2,799) $ (6,533) $ (5,438)
Net income (loss) attributable to common limited partners $ (30,957) $ (19,835) $ 94,980 $ (38,383)
Denominator for basic and diluted EPU:
Weighted-average common units outstanding – basic 10,649 10,369 10,549 10,291
Effect of nonvested phantom units — — 532 —
Weighted-average common units outstanding – diluted
10,649 10,369 11,081 10,291
Net income (loss) per limited partner unit:
Common unit – basic
$ (2.91) $ (1.91) $ 9.00 $ (3.73)
Common unit – diluted
$ (2.91) $ (1.91) $ 8.57 $ (3.73)
Nonvested anti-dilutive phantom units excluded from the calculation of diluted EPU
— 217 19 251

v3.24.2.u1

SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
6 Months Ended

Jun. 30, 2024

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures
Six Months Ended June 30,
2024 2023
(In thousands)
Supplemental cash flow information:
Cash interest paid $ 65,807 $ 62,587
Cash paid for taxes $ 15 $ 15
Noncash investing and financing activities:
Capital expenditures in trade accounts payable (period-end accruals) $ 8,999 $ 8,399
Accretion of Subsidiary Series A Preferred Units, net of issuance cost amortization $ 7,636 $ 5,242

v3.24.2.u1

COMMITMENTS AND CONTINGENCIES (Tables)
6 Months Ended

Jun. 30, 2024

Commitments and Contingencies Disclosure [Abstract]

Schedule of Accrued Environmental Remediation
An update of the Partnership’s undiscounted accrued environmental remediation is as follows and is primarily related to the 2015 Blacktail Release and other environmental remediation activities, as detailed below.
(In thousands)
Accrued environmental remediation, December 31, 2023 $ 2,937
Payments made
(598)
Changes in estimates
623
Accrued environmental remediation, June 30, 2024 $ 2,962

v3.24.2.u1

SEGMENT INFORMATION (Tables)
6 Months Ended

Jun. 30, 2024

Segment Reporting [Abstract]

Schedule of Reconciliation of Assets from Segment to Consolidated
Assets by reportable segment follow.
June 30, 2024 December 31, 2023
(In thousands)
Assets:
Rockies $ 905,649 $ 904,974
Permian 289,168 291,073
Northeast 2,343 573,663
Piceance 407,191 431,687
Barnett 272,090 281,861
Total reportable segment assets
1,876,441 2,483,258
Corporate and Other 156,497 10,940
Total assets
$ 2,032,938 $ 2,494,198

Schedule of Reconciliation of Net Income to Adjusted EBITDA
Segment adjusted EBITDA by reportable segment follows.
Three Months Ended June 30, Six Months Ended June 30,
2024 2023 2024 2023
(In thousands)
Reportable segment adjusted EBITDA(1)
Rockies $ 22,858 $ 16,858 $ 45,732 $ 39,988
Permian 7,697 5,370 14,962 10,443
Northeast 1,613 20,201 30,634 38,055
Piceance 12,848 14,365 28,081 28,348
Barnett 5,420 7,269 10,520 14,296
Total of reportable segments' measures of profit
$ 50,436 $ 64,063 $ 129,929 $ 131,130
(1) Segment adjusted EBITDA is a non-GAAP financial measure. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations - Results of Operations” for additional information.
A reconciliation of income or loss before income taxes and income from equity method investees to total of reportable segments' measures of profit follows.
Three Months Ended June 30, Six Months Ended June 30,
2024 2023 2024 2023
(In thousands)
Reconciliation of loss before income taxes and income from equity method investees to total of reportable segments' measures of profit:
Income (loss) before income taxes and income from equity method investees
$ (28,712) $ (20,722) $ 93,787 $ (40,046)
Add:
Corporate and Other expense
4,391 3,606 11,397 13,069
Interest expense
31,457 35,175 69,303 69,398
Depreciation and amortization (1)
24,152 30,366 52,254 60,425
Proportional adjusted EBITDA for equity method investees (2)
6,842 14,100 27,517 25,738
Adjustments related to capital reimbursement activity
(2,728) (2,481) (5,651) (3,667)
Unit-based and noncash compensation
2,086 1,833 4,858 3,762
(Gain) loss on asset sales, net 34 (75) 7 (143)
(Gain) loss on sale of business 2,192 54 (84,010) 36
Gain on sale of Ohio Gathering — — (126,261) —
Long-lived asset impairment
20 455 67,936 455
Transaction costs and other
5,738 1,752 13,828 2,103
Early extinguishment of debt
4,964 — 4,964 —
Total of reportable segments' measures of profit
$ 50,436 $ 64,063 $ 129,929 $ 131,130
________
(1) Includes the amortization expense associated with our favorable gas gathering contracts as reported in other revenues.
(2) The Partnership records financial results of its investment in Ohio Gathering on a one-month lag and is based on the financial information available to us during the reporting period. With the divestiture of Ohio Gathering in March 2024, proportional adjusted EBITDA includes financial results from December 1, 2023 through March 22, 2024.

v3.24.2.u1

SUBSEQUENT EVENTS (Tables)
6 Months Ended

Jun. 30, 2024

Subsequent Events [Abstract]

Schedule of Redemption Price Thereafter, Summit Holdings may redeem all or a portion of the 2029 Notes in whole at any time or in part from time to time at the following redemption prices (expressed as percentages of the principal amount) plus accrued and unpaid interest if redeemed during the periods indicated below:
Period Redemption Price
July 31, 2026 to July 30, 2027
104.313 %
July 31, 2027 to July 30, 2028
102.156 %
July 31, 2028 and thereafter
100.000 %

v3.24.2.u1

DIVESTITURES - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended

Apr. 30, 2024

Jun. 30, 2024

Mar. 31, 2024

Jun. 30, 2023

Jun. 30, 2024

Jun. 30, 2023

May 01, 2024

Mar. 22, 2024

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Gain on disposition of business $ (2,192) $ (54) $ 84,010 $ (36)

Proceeds from Summit Utica Sale (excluding Ohio Gathering) 292,266 0

Gain on sale of Ohio Gathering 0 0 126,261 0

Proceeds from asset sale 4,400 128

Long-lived asset impairments 20 $ 455 67,936 $ 455

Summit Utica | OGC

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Percentage of ownership interest 36.00%

Summit Utica | OCC

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Percentage of ownership interest 38.00%

Disposal Group, Disposed of by Sale, Not Discontinued Operations

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Gain on disposition of business 85,600

Net book value of assets and liabilities divested $ 143,000 $ 143,000

Long-lived asset impairments $ 68,000

Disposal Group, Disposed of by Sale, Not Discontinued Operations | Summit Utica

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Cash consideration $ 625,000

Gain on disposition of business 212,500

Proceeds from Summit Utica Sale (excluding Ohio Gathering) 625,000

Net book value of assets and liabilities divested $ 412,500

Disposal Group, Disposed of by Sale, Not Discontinued Operations | Mountaineer Midstream Company, LLC

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Cash consideration $ 70,000

Proceeds from asset sale $ 5,000

v3.24.2.u1

PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant, and Equipment, Net (Details) - USD ($)
$ in Thousands

Jun. 30, 2024

Dec. 31, 2023

Property, Plant and Equipment [Line Items]

Total $ 2,051,124 $ 2,468,607

Less: accumulated depreciation (684,602) (770,022)

Property, plant and equipment, net 1,366,522 1,698,585

Gathering and processing systems and related equipment

Property, Plant and Equipment [Line Items]

Total 1,932,418 2,335,980

Construction in progress

Property, Plant and Equipment [Line Items]

Total 42,338 56,064

Land and line fill

Property, Plant and Equipment [Line Items]

Total 11,534 11,534

Other

Property, Plant and Equipment [Line Items]

Total $ 64,834 $ 65,029

v3.24.2.u1

PROPERTY, PLANT AND EQUIPMENT - Schedule Of Depreciation Expense And Capitalized Interest Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Jun. 30, 2024

Jun. 30, 2023

Property, Plant and Equipment [Abstract]

Depreciation expense $ 20,357 $ 23,285 $ 43,928 $ 46,204

Capitalized interest $ 175 $ 246 $ 647 $ 439

v3.24.2.u1

EQUITY METHOD INVESTMENTS - Schedule of Equity Method Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Jun. 30, 2024

Jun. 30, 2023

Dec. 31, 2023

Schedule of Equity Method Investments [Line Items]

Gain on sale of Ohio Gathering $ 0 $ 0 $ 126,261 $ 0

Investment in equity method investees 271,622 271,622 $ 486,434

Double E

Schedule of Equity Method Investments [Line Items]

Investment in equity method investees 271,622 271,622 276,221

Ohio Gathering

Schedule of Equity Method Investments [Line Items]

Investment in equity method investees $ 0 $ 0 $ 210,213

v3.24.2.u1

DEFERRED REVENUE (Details)
$ in Thousands
6 Months Ended

Jun. 30, 2024

USD ($)

Change in Contract with Customer, Liability, Current [Roll Forward]

Current deferred revenue, beginning balance $ 10,196

Add: additions 3,830

Less: revenue recognized and other (5,721)

Current deferred revenue, ending balance 8,305

Change in Contract with Customer, Liability, Noncurrent [Roll Forward]

Noncurrent deferred revenue, beginning balance 30,085

Add: additions 3,378

Less: reclassification to current deferred revenue and other (3,967)

Noncurrent deferred revenue, ending balance $ 29,496

v3.24.2.u1

DEBT - Schedule of Maturities of Long-term Debt (Details) - Permian Transmission Term Loan: Summit Permian Transmission's variable rate senior secured term loan due January 2028
$ in Thousands

Jun. 30, 2024

USD ($)

Debt

Amortizing principal repayments $ 137,225

2024 7,903

2025 16,580

2026 16,967

2027 17,769

2028 $ 78,006

v3.24.2.u1

FINANCIAL INSTRUMENTS - Schedule of Carrying and Estimated Fair Values of Debt Instruments (Details) - USD ($)
$ in Thousands

Jun. 30, 2024

Dec. 31, 2023

2025 Senior Notes | Carrying Value

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Senior notes $ 49,783 $ 49,783

2025 Senior Notes | Fair Value | Estimated Fair Value (Level 2)

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Senior notes 49,451 48,414

2026 Secured Notes | Carrying Value

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Senior notes 764,464 785,000

2026 Secured Notes | Fair Value | Estimated Fair Value (Level 2)

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Senior notes 785,818 778,131

2026 Unsecured Notes | Carrying Value

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Senior notes 0 209,510

2026 Unsecured Notes | Fair Value | Estimated Fair Value (Level 2)

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Senior notes $ 0 $ 203,225

v3.24.2.u1

FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Jun. 30, 2024

Jun. 30, 2023

Dec. 31, 2023

Concentration Risk [Line Items]

Gain (loss) on interest rate swaps $ 920 $ 3,268 $ 3,510 $ 1,995

Interest Rate Swap

Concentration Risk [Line Items]

Derivative liability, notional amount 123,500 123,500 $ 130,400

Fair value of interest rate swap 12,800 12,800 11,900

Gain (loss) on interest rate swaps $ 900 $ 3,500

Fair Value, Inputs, Level 3 | Sterling DJ

Concentration Risk [Line Items]

Deferred earn-out liability $ 5,100

v3.24.2.u1

PARTNERS' CAPITAL AND MEZZANINE CAPITAL - Schedule Of Partner Units Activity (Details) - Common Units
6 Months Ended

Jun. 30, 2024

shares

Increase (Decrease) in Partners' Capital [Roll Forward]

Units, beginning balance (in shares) 10,376,189

Common units issued for SMLP LTIP, net (in shares) 272,496

Units, ending balance (in shares) 10,648,685

v3.24.2.u1

PARTNERS' CAPITAL AND MEZZANINE CAPITAL - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended

Jun. 30, 2020

Jun. 30, 2024

Dec. 31, 2023

Partners Capital [Line Items]

Maximum period following end of quarter to distribute all available cash 45 days

Series A Preferred Units

Partners Capital [Line Items]

Subsidiary Series A preferred unitholders, outstanding (in shares) 65,508 65,508

Subsidiary Series A Preferred Units

Partners Capital [Line Items]

Preferred units outstanding (in shares) 93,039,000 93,039,000

Preferred units issued (in shares) 93,039,000 93,039,000

Series A Preferred Units

Partners Capital [Line Items]

Accrued and unpaid distributions $ 39.6

Redemption amount 128.8

Issuance costs $ 1.4 $ 1.7

v3.24.2.u1

PARTNERS' CAPITAL AND MEZZANINE CAPITAL - Schedule of Consolidation, Parent Ownership Interest, Effects of Changes, Net (Details) - USD ($)
$ in Thousands
6 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Series A Preferred Units

Increase (Decrease) in Partners' Capital [Roll Forward]

Redemption accretion, net of issuance cost amortization $ 7,636 $ 5,242

Series A Preferred Units

Increase (Decrease) in Partners' Capital [Roll Forward]

Beginning balance 124,652

Cash distribution (includes a $1.6 million distribution payable as of June 30, 2024) (3,256)

Ending balance 129,032

Distribution payable $ 1,600

v3.24.2.u1

EARNINGS PER UNIT (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Jun. 30, 2024

Jun. 30, 2023

Earnings Per Share [Abstract]

Net income (loss) $ (23,778) $ (13,540) $ 109,149 $ (27,703)

Less: Net income attributable to Subsidiary Series A Preferred Units (3,866) (3,496) (7,636) (5,242)

Net income (loss) attributable to Summit Midstream Partners, LP (27,644) (17,036) 101,513 (32,945)

Less: net income attributable to Series A Preferred Units (3,313) (2,799) (6,533) (5,438)

Net income (loss) attributable to common limited partners $ (30,957) $ (19,835) $ 94,980 $ (38,383)

Weighted-average common units outstanding – basic (in shares) 10,649,000 10,369,000 10,549,000 10,291,000

Effect of nonvested phantom units (in shares) 0 0 532,000 0

Weighted-average common units outstanding – diluted (in shares) 10,649,000 10,369,000 11,081,000 10,291,000

Common unit - basic (in dollars per share) $ (2.91) $ (1.91) $ 9.00 $ (3.73)

Common unit - diluted (in dollars per share) $ (2.91) $ (1.91) $ 8.57 $ (3.73)

Nonvested anti-dilutive phantom units excluded from the calculation of diluted EPU (in shares) 0 217,000 19,000 251,000

v3.24.2.u1

SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)
$ in Thousands
6 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Supplemental cash flow information:

Cash interest paid $ 65,807 $ 62,587

Cash paid for taxes 15 15

Noncash investing and financing activities:

Capital expenditures in trade accounts payable (period-end accruals) 8,999 8,399

Series A Preferred Units

Noncash investing and financing activities:

Accretion of Subsidiary Series A Preferred Units, net of issuance cost amortization $ 7,636 $ 5,242

v3.24.2.u1

UNIT-BASED AND NONCASH COMPENSATION (Details) - SMLP LTIP
$ in Millions
6 Months Ended

May 16, 2024

shares

Jun. 30, 2024

USD ($)

director

shares

Phantom Share Units And Associated Distribution Equivalent Rights

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Granted units (in shares) 230,815

Grant date fair value | $ $ 3.7

Vesting period 3 years

Performance Units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Granted units (in shares) 122,867

Grant date fair value | $ $ 2.4

Vesting period 3 years

Common Units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Grant date fair value | $ $ 0.6

Issued units (in shares) 750,000 39,486

Number of directors | director 6

Phantom Units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Units remaining available (in shares) 900,000

Unvested phantom units granted (in shares) 700,000

v3.24.2.u1

COMMITMENTS AND CONTINGENCIES - Schedule of Accrued Environmental Remediation (Details) - Meadowlark Midstream Gathering System
$ in Thousands
6 Months Ended

Jun. 30, 2024

USD ($)

Accrual for Environmental Loss Contingencies [Roll Forward]

Accrued environmental remediation, beginning balance $ 2,937

Payments made (598)

Changes in estimates 623

Accrued environmental remediation, ending balance $ 2,962

v3.24.2.u1

COMMITMENTS AND CONTINGENCIES - Narrative (Details)
$ in Thousands
6 Months Ended

Jun. 30, 2024

USD ($)

claim

Dec. 31, 2023

USD ($)

Loss Contingencies [Line Items]

Legal fines and other fees $ 36,300

Claims settled | claim 1

2015 Blacktail Release

Loss Contingencies [Line Items]

Loss contingency accrual $ 21,700 $ 21,700

Penalties and fines, payment period 3 years

Unpaid penalties and fines, fixed rate (as a percent) 3.25%

Expected payment $ 6,700

Claims settled | claim 1

Pending claims | claim 2

Natural Resource Damages To Federal and State Governments | 2015 Blacktail Release

Loss Contingencies [Line Items]

Legal fines and other fees $ 1,250

Penalties and fines, payment period 5 years

Damages Payable To Federal Government over Five Years | 2015 Blacktail Release

Loss Contingencies [Line Items]

Legal fines and other fees $ 25,000

Damages Payable To State Governments Over Six Years | 2015 Blacktail Release

Loss Contingencies [Line Items]

Legal fines and other fees $ 10,000

Penalties and fines, payment period 6 years

Damages Payable To Federal Criminal Over Five Years | 2015 Blacktail Release

Loss Contingencies [Line Items]

Penalties and fines, payment period 5 years

v3.24.2.u1

SEGMENT INFORMATION - Adjusted EBITDA by Reportable Segment (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Jun. 30, 2024

Jun. 30, 2023

Segment Reporting Information [Line Items]

Adjusted EBITDA $ 50,436 $ 64,063 $ 129,929 $ 131,130

Rockies

Segment Reporting Information [Line Items]

Adjusted EBITDA 22,858 16,858 45,732 39,988

Permian

Segment Reporting Information [Line Items]

Adjusted EBITDA 7,697 5,370 14,962 10,443

Northeast

Segment Reporting Information [Line Items]

Adjusted EBITDA 1,613 20,201 30,634 38,055

Piceance

Segment Reporting Information [Line Items]

Adjusted EBITDA 12,848 14,365 28,081 28,348

Barnett

Segment Reporting Information [Line Items]

Adjusted EBITDA $ 5,420 $ 7,269 $ 10,520 $ 14,296

v3.24.2.u1

SEGMENT INFORMATION - Schedule of Reconciliation of Net Loss to Adjusted EBITDA (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Jun. 30, 2024

Jun. 30, 2023

Segment Reporting [Abstract]

Income (loss) before income taxes and income from equity method investees $ (28,712) $ (20,722) $ 93,787 $ (40,046)

Add:

Corporate and Other expense 4,391 3,606 11,397 13,069

Interest expense 31,457 35,175 69,303 69,398

Depreciation and amortization 24,152 30,366 52,254 60,425

Proportional adjusted EBITDA for equity method investees 6,842 14,100 27,517 25,738

Adjustments related to capital reimbursement activity (2,728) (2,481) (5,651) (3,667)

Unit-based and noncash compensation 2,086 1,833 4,858 3,762

(Gain) loss on asset sales, net 34 (75) 7 (143)

(Gain) loss on sale of business (84,010) 0

Gain on sale of Ohio Gathering 0 0 (126,261) 0

Long-lived asset impairments 20 455 67,936 455

Transaction costs and other 5,738 1,752 13,828 2,103

Early extinguishment of debt 4,964 0 4,964 0

Total of reportable segments' measures of profit $ 50,436 $ 64,063 $ 129,929 $ 131,130

v3.24.2.u1

SUBSEQUENT EVENTS - Schedule of Redemption Price (Details) - Senior Secured Second Lien Notes, 2029 - Subsequent Event - Summit Holdings And Finance Corporation

Jul. 30, 2026

Jul. 26, 2024

Subsequent Event [Line Items]

Redemption price, expressed as percentage of principal amount 108.625%

Debt Instrument, Redemption, Period One

Subsequent Event [Line Items]

Redemption price, expressed as percentage of principal amount 104.313%

Debt Instrument, Redemption, Period Two

Subsequent Event [Line Items]

Redemption price, expressed as percentage of principal amount 102.156%

Debt Instrument, Redemption, Period After Two

Subsequent Event [Line Items]

Redemption price, expressed as percentage of principal amount 100.00%

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Cover Page	6 Months Ended
Cover Page	Jun. 30, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	001-35666
Entity Registrant Name	Summit Midstream Partners, LP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	45-5200503
Entity Address, Address Line One	910 Louisiana Street
Entity Address, Address Line Two	Suite 4200
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	832
Local Phone Number	413-4770
Title of 12(b) Security	Common Units
Trading Symbol	SMLP
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001549922
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
ASSETS
Cash and cash equivalents	$ 156,008	$ 14,044
Restricted cash	4,208	2,601
Accounts receivable	55,991	76,275
Other current assets	5,227	5,502
Total current assets	221,434	98,422
Property, plant and equipment, net	1,366,522	1,698,585
Intangible assets, net	143,735	175,592
Investment in equity method investees	271,622	486,434
Other noncurrent assets	29,625	35,165
TOTAL ASSETS	2,032,938	2,494,198
LIABILITIES AND CAPITAL
Trade accounts payable	19,090	22,714
Accrued expenses	32,494	32,377
Deferred revenue	8,305	10,196
Ad valorem taxes payable	4,819	8,543
Accrued compensation and employee benefits	4,943	6,815
Accrued interest	16,160	19,298
Accrued environmental remediation	1,764	1,483
Accrued settlement payable	6,667	6,667
Current portion of long-term debt	65,708	15,524
Other current liabilities	6,695	10,395
Total current liabilities	166,645	134,012
Long-term debt, net	861,676	1,455,166
Noncurrent deferred revenue	29,496	30,085
Noncurrent accrued environmental remediation	1,198	1,454
Other noncurrent liabilities	21,839	30,266
TOTAL LIABILITIES	1,080,854	1,650,983
Commitments and contingencies (Note 14)
Mezzanine Capital
Subsidiary Series A Preferred Units (93,039 units issued and outstanding at June 30, 2024 and December 31, 2023)	129,032	124,652
Partners' Capital
Series A Preferred Units (65,508 units issued and outstanding at June 30, 2024 and December 31, 2023)	103,426	96,893
Common limited partner capital (10,648,685 and 10,376,189 units issued and outstanding at June 30, 2024 and December 31, 2023, respectively)	719,626	621,670
Total partners' capital	823,052	718,563
TOTAL LIABILITIES AND CAPITAL	$ 2,032,938	$ 2,494,198

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares	Jun. 30, 2024	Dec. 31, 2023
Partners' Capital
Common limited partner capital, issued (in shares)	10,648,685	10,376,189
Common limited partner capital, outstanding (in shares)	10,648,685	10,376,189
Subsidiary Series A Preferred Units
Preferred units, issued (in shares)	93,039,000	93,039,000
Series A Preferred Units Outstanding (in shares)	93,039,000	93,039,000
Series A Preferred Units
Partners' Capital
Preferred units, issued (in shares)	65,508	65,508
Preferred units, outstanding (in shares)	65,508	65,508

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues:
Total revenues	$ 101,315	$ 97,893	$ 220,186	$ 210,392
Costs and expenses:
Type of Cost, Good or Service [Extensible List]	Natural Gas Liquids (NGL) [Member]	Natural Gas Liquids (NGL) [Member]	Natural Gas Liquids (NGL) [Member]	Natural Gas Liquids (NGL) [Member]
Cost of natural gas and NGLs	$ 29,619	$ 19,975	$ 59,801	$ 50,857
Operation and maintenance	23,440	25,158	48,452	49,130
General and administrative	14,164	10,812	28,949	20,799
Depreciation and amortization	23,917	30,132	51,784	59,956
Transaction costs	3,271	480	11,062	782
Acquisition integration costs	0	723	40	2,225
(Gain) loss on asset sales, net	34	(75)	7	(143)
Long-lived asset impairments	20	455	67,936	455
Total costs and expenses	94,465	87,660	268,031	184,061
Other income, net	2,131	1,006	2,118	1,062
Gain on interest rate swaps	920	3,268	3,510	1,995
Gain (loss) on sale of business	(2,192)	(54)	84,010	(36)
Gain on sale of Ohio Gathering	0	0	126,261	0
Interest expense	(31,457)	(35,175)	(69,303)	(69,398)
Loss on early extinguishment of debt	(4,964)	0	(4,964)	0
Income (loss) before income taxes and equity method investment income	(28,712)	(20,722)	93,787	(40,046)
Income tax benefit	654	0	444	252
Income from equity method investees	4,280	7,182	14,918	12,091
Net income (loss)	(23,778)	(13,540)	109,149	(27,703)
Less: Net income attributable to Subsidiary Series A Preferred Units	(3,866)	(3,496)	(7,636)	(5,242)
Net income (loss) attributable to Summit Midstream Partners, LP	(27,644)	(17,036)	101,513	(32,945)
Less: net income attributable to Series A Preferred Units	(3,313)	(2,799)	(6,533)	(5,438)
Net income (loss) attributable to common limited partners	$ (30,957)	$ (19,835)	$ 94,980	$ (38,383)
Net income (loss) per limited partner unit:
Common unit - basic (in dollars per share)	$ (2.91)	$ (1.91)	$ 9.00	$ (3.73)
Common unit - diluted (in dollars per share)	$ (2.91)	$ (1.91)	$ 8.57	$ (3.73)
Weighted-average limited partner units outstanding:
Common units – basic (in shares)	10,649	10,369	10,549	10,291
Common units - diluted (in shares)	10,649	10,369	11,081	10,291
Gathering services and related fees
Revenues:
Total revenues	$ 45,213	$ 57,086	$ 107,198	$ 114,457
Natural gas, NGLs and condensate sales
Revenues:
Total revenues	47,959	36,082	97,051	85,245
Other revenues
Revenues:
Total revenues	$ 8,143	$ 4,725	$ 15,937	$ 10,690

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL - USD ($) $ in Thousands	Total	Common Limited Partners Capital	Common Limited Partners Capital Series A Preferred Units
Beginning balance at Dec. 31, 2022	$ 764,818	$ 679,491	$ 85,327
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(15,909)	(18,548)	2,639
Unit-based compensation	1,929	1,929	0
Tax withholdings and associated payments on vested SMLP LTIP awards	(1,136)	(1,136)	0
Ending balance at Mar. 31, 2023	749,702	661,736	87,966
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(17,036)	(19,835)	2,799
Unit-based compensation	1,833	1,833	0
Tax withholdings and associated payments on vested SMLP LTIP awards	(148)	(148)	0
Ending balance at Jun. 30, 2023	734,351	643,586	90,765
Beginning balance at Dec. 31, 2023	718,563	621,670	96,893
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	129,157	125,937	3,220
Unit-based compensation	2,772	2,772	0
Tax withholdings and associated payments on vested SMLP LTIP awards	(1,878)	(1,878)	0
Ending balance at Mar. 31, 2024	848,614	748,501	100,113
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(27,644)	(30,957)	3,313
Unit-based compensation	2,086	2,086	0
Tax withholdings and associated payments on vested SMLP LTIP awards	(4)	(4)	0
Ending balance at Jun. 30, 2024	$ 823,052	$ 719,626	$ 103,426

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income (loss)	$ 109,149	$ (27,703)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	52,254	60,425
Noncash lease expense	1,705	2,827
Amortization of debt issuance costs	6,903	6,325
Unit-based and noncash compensation	4,858	3,762
Income from equity method investees	(14,918)	(12,091)
Distributions from equity method investees	23,659	23,904
Interest income and other	(2,498)	(175)
Loss on early extinguishment of debt	4,964	0
Gain on sale of business	(84,010)	0
Gain on sale of equity method investment	(126,261)	0
Unrealized (gain) loss on interest rate swaps	(853)	423
Long-lived asset impairment	67,936	455
Changes in operating assets and liabilities:
Accounts receivable	14,462	14,783
Trade accounts payable	(6,076)	81
Accrued expenses	(702)	(1,429)
Deferred revenue, net	(2,153)	(2,331)
Ad valorem taxes payable	(3,724)	(4,247)
Accrued interest	(3,138)	1,049
Accrued environmental remediation, net	26	(556)
Other, net	(10,610)	(13,862)
Net cash provided by operating activities	30,973	51,640
Cash flows from investing activities:
Capital expenditures	(26,920)	(32,178)
Proceeds from Summit Utica Sale (excluding Ohio Gathering)	292,266	0
Proceeds from sale of Ohio Gathering	332,734	0
Proceeds from Mountaineer Transaction	70,000	0
Proceeds from asset sale	4,400	128
Investment in Double E equity method investee	(442)	(3,500)
Other, net	0	(2,667)
Net cash provided by (used in) investing activities	672,038	(38,217)
Cash flows from financing activities:
Debt repayments - ABL Facility	(313,000)	(37,000)
Debt repayments - Redemption of 2026 Unsecured Notes	(209,510)	0
Borrowings on ABL Facility	0	35,000
Distributions on Subsidiary Series A Preferred Units	(3,256)	(3,256)
Payments To Acquire Common Units	(2,095)	0
Debt issuance costs	0	(168)
Other, net	(3,422)	(1,533)
Net cash used in financing activities	(559,440)	(12,077)
Net change in cash, cash equivalents and restricted cash	143,571	1,346
Cash, cash equivalents and restricted cash, beginning of period	16,645	13,531
Cash, cash equivalents and restricted cash, end of period	160,216	14,877
2026 Secured Notes Excess Cash Flow Offer
Cash flows from financing activities:
Debt repayments - Secured Notes	(13,626)	0
2026 Secured Notes Asset Sale Offer
Cash flows from financing activities:
Debt repayments - Secured Notes	(6,910)	0
Permian Transmission Term Loan
Cash flows from financing activities:
Debt repayments - Secured Notes	$ (7,621)	$ (5,120)

ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION	6 Months Ended
	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION	1. ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION Organization. Summit Midstream Partners, LP (including its subsidiaries, collectively “SMLP” or the “Partnership”) is a Delaware limited partnership that was formed in May 2012 and began operations in October 2012. SMLP is a value-oriented limited partnership focused on developing, owning and operating midstream energy infrastructure assets that are strategically located in unconventional resource basins, primarily shale formations, in the continental United States. The Partnership’s business activities are primarily conducted through various operating subsidiaries, each of which is owned or controlled by its wholly owned subsidiary holding company, Summit Holdings, a Delaware limited liability company. Business Operations. The Partnership provides natural gas gathering, compression, treating and processing services as well as crude oil and produced water gathering services pursuant to primarily long-term, fee-based agreements with its customers. In addition to these services, the Partnership also provides freshwater delivery services pursuant to short-term agreements with customers. The Partnership’s results are primarily driven by the volumes of natural gas that it gathers, compresses, treats and/or processes as well as by the volumes of crude oil and produced water that it gathers. As of June 30, 2024, other than the Partnership’s investment in Double E, all of its business activities are conducted through wholly owned operating subsidiaries. Presentation and Consolidation. The Partnership prepares its condensed consolidated financial statements in accordance with GAAP as established by the FASB and pursuant to the rules and regulations of the SEC pertaining to interim financial information. The unaudited condensed consolidated financial statements contained in this report include all normal and recurring material adjustments that, in the opinion of management, are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods presented herein. These unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and related notes that are included in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2023. The Partnership makes estimates and assumptions that affect the reported amounts of assets and liabilities at the balance sheet dates, including fair value measurements, the reported amounts of revenues and expenses and the disclosure of commitments and contingencies. Although management believes these estimates are reasonable, actual results could differ from its estimates. The unaudited condensed consolidated financial statements include the assets, liabilities and results of operations of SMLP and its subsidiaries. All intercompany transactions among the consolidated entities have been eliminated in consolidation. Comprehensive income or loss is the same as net income or loss for all periods presented.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP There have been no changes to the Partnership’s significant accounting policies since December 31, 2023. Accounting standards recently implemented. ASU No. 2020-06 Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815–40) (“ASU 2020-06”). ASU 2020-06 simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity. The ASU is part of the FASB’s simplification initiative, which aims to reduce unnecessary complexity in GAAP. The ASU’s amendments are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. The provisions of ASU 2020-06 did not have a material impact on the Partnership’s condensed consolidated financial statements and disclosures. New accounting standards not yet implemented. ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). ASU 2023-07 enhances disclosures on reportable segments and provides additional detailed information about significant segment expenses. The guidance in ASU 2023-07 is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The Partnership continues to assess the impact of the new guidance, but does not expect the provisions of ASU 2023-07 will have a material impact on its consolidated financial statements and disclosures.

DIVESTITURES	6 Months Ended
DIVESTITURES	Jun. 30, 2024
Discontinued Operations and Disposal Groups [Abstract]
DIVESTITURES	3. DIVESTITURES Summit Utica Sale. On March 22, 2024, the Partnership completed the disposition of Summit Utica, LLC (“Summit Utica”) to a subsidiary of MPLX LP (“MPLX”) for a cash sale price of $625.0 million, subject to customary post-closing adjustments (the “Utica Sale”). Summit Utica was the owner of (i) approximately 36% of the issued and outstanding equity interests in OGC, (ii) approximately 38% of the issued and outstanding equity interests in OCC, together with OGC, Ohio Gathering and (iii) midstream assets located in the Utica Shale. Ohio Gathering was the owner of a natural gas gathering system and condensate stabilization facility located in Belmont and Monroe counties in the Utica Shale in southeastern Ohio. During the quarterly period ended March 31, 2024, the Partnership recognized a total gain on the disposition of Summit Utica of $212.5 million based on total cash proceeds received of $625.0 million and net assets sold of $412.5 million. A portion of the cash proceeds was used to reduce amounts outstanding under the ABL Facility and pay the costs and expenses in connection with the Asset Sale Offer (as defined below) (see Note 8 - Debt, for additional information) and are subject to final working capital adjustments. The $625.0 million sale price did not discretely list values for either OGC, OCC or the Partnership’s midstream assets located in the Utica Shale. Using fair value methods allowed by GAAP, the Partnership derived a preliminary fair value estimate for the disposed assets and then determined the appropriate gain recognition amount for each disposal to include in its unaudited condensed consolidated financial statements. The estimated fair values were determined utilizing a discounted cash flow technique based on estimated revenues, costs, capital expenditures and an appropriate discount rate. Given the unobservable nature of the inputs, the fair value measurement is deemed to use Level 3 inputs. These fair value estimates are preliminary, and subject to change and such changes could be material. Based on these preliminary fair values, the Partnership recognized a gain on the disposition of the Utica midstream business of $85.6 million, which is recorded within gain on sale of business in the unaudited condensed consolidated statements of operations, and a gain of $126.3 million related to the disposition of Ohio Gathering, which is recorded within gain on sale of Ohio Gathering in the unaudited condensed consolidated statements of operations. Mountaineer Midstream System. On May 1, 2024, the Partnership completed the sale of its Mountaineer Midstream system, to Antero Midstream LLC for a cash sale price of $70.0 million, subject to customary post-closing adjustments (the “Mountaineer Transaction”). Mountaineer Midstream was the owner of midstream assets located in the Marcellus Shale. Prior to closing the Mountaineer Transaction, the Partnership sold related compression assets located in the Marcellus Shale to a compression service provider for cash consideration of approximately $5 million in April 2024. During the three months ended March 31, 2024, the Partnership recognized an impairment of $68 million in connection with the Mountaineer Transaction and the sale of compression assets based on their estimated fair value and net assets of approximately $143 million.

UNIT-BASED AND NONCASH COMPENSATION	6 Months Ended
UNIT-BASED AND NONCASH COMPENSATION	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
UNIT-BASED AND NONCASH COMPENSATION	13. UNIT-BASED AND NONCASH COMPENSATION SMLP Long-Term Incentive Plan. The Partnership’s 2022 Long-Term Incentive Plan (“SMLP LTIP”) provides for equity awards to eligible officers, employees, consultants and directors of the Partnership, thereby linking the recipients’ compensation directly to SMLP’s performance. Significant items to note: •For the six-month period ended June 30, 2024, the Partnership granted 230,815 time-based phantom units and associated distribution equivalent rights to employees in connection with the Partnership’s annual incentive compensation award cycle. The grant date fair value of these awards totaled $3.7 million and the awards vest ratably over a 3-year period. •For the six-month period ended June 30, 2024, the Partnership granted 122,867 performance-based phantom units and associated distribution equivalent rights to certain members of management in connection with the Partnership’s annual incentive compensation award cycle. The grant date fair value of these awards totaled $2.4 million and the awards vest at the end of three years. •For the six-month period ended June 30, 2024, the Partnership issued 39,486 common units to the Partnership’s six independent directors in connection with their annual compensation plan. The grant date fair value of these awards totaled $0.6 million and became fully vested at the grant date. •On May 16, 2024, the Board of Directors of the Partnership approved the First Amendment to the SMLP LTIP, which increased the number of common units that may be delivered with respect to awards granted under the SMLP LTIP by 750,000 common units. As of June 30, 2024, approximately 0.9 million common units remained available for future issuance under the SMLP LTIP, which includes the impact of 0.7 million granted but unvested phantom units.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP (Policies)	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation	The Partnership prepares its condensed consolidated financial statements in accordance with GAAP as established by the FASB and pursuant to the rules and regulations of the SEC pertaining to interim financial information. The unaudited condensed consolidated financial statements contained in this report include all normal and recurring material adjustments that, in the opinion of management, are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods presented herein.
Use of Estimates	The Partnership makes estimates and assumptions that affect the reported amounts of assets and liabilities at the balance sheet dates, including fair value measurements, the reported amounts of revenues and expenses and the disclosure of commitments and contingencies. Although management believes these estimates are reasonable, actual results could differ from its estimates.
Consolidation	The unaudited condensed consolidated financial statements include the assets, liabilities and results of operations of SMLP and its subsidiaries. All intercompany transactions among the consolidated entities have been eliminated in consolidation. Comprehensive income or loss is the same as net income or loss for all periods presented.
Accounting standards recently implemented and New accounting standards not yet implemented	Accounting standards recently implemented. ASU No. 2020-06 Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815–40) (“ASU 2020-06”). ASU 2020-06 simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity. The ASU is part of the FASB’s simplification initiative, which aims to reduce unnecessary complexity in GAAP. The ASU’s amendments are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. The provisions of ASU 2020-06 did not have a material impact on the Partnership’s condensed consolidated financial statements and disclosures. New accounting standards not yet implemented. ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). ASU 2023-07 enhances disclosures on reportable segments and provides additional detailed information about significant segment expenses. The guidance in ASU 2023-07 is effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The Partnership continues to assess the impact of the new guidance, but does not expect the provisions of ASU 2023-07 will have a material impact on its consolidated financial statements and disclosures.

DIVESTITURES - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended			6 Months Ended
DIVESTITURES - Narrative (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	May 01, 2024	Mar. 22, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposition of business		$ (2,192)		$ (54)	$ 84,010	$ (36)
Proceeds from Summit Utica Sale (excluding Ohio Gathering)					292,266	0
Gain on sale of Ohio Gathering		0		0	126,261	0
Proceeds from asset sale					4,400	128
Long-lived asset impairments		20		$ 455	67,936	$ 455
Summit Utica \| OGC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of ownership interest								36.00%
Summit Utica \| OCC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of ownership interest								38.00%
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposition of business					85,600
Net book value of assets and liabilities divested		$ 143,000			$ 143,000
Long-lived asset impairments			$ 68,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Summit Utica
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration								$ 625,000
Gain on disposition of business			212,500
Proceeds from Summit Utica Sale (excluding Ohio Gathering)			625,000
Net book value of assets and liabilities divested			$ 412,500
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Mountaineer Midstream Company, LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration							$ 70,000
Proceeds from asset sale	$ 5,000

REVENUE - Schedule of Estimated Revenue Expected to be Recognized and MVC Shortfall Payments (Details) - Gathering services and related fees $ in Thousands	Jun. 30, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 23,926
Revenue, remaining performance obligation, expected timing of satisfaction	6 months
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	$ 37,249
Revenue, remaining performance obligation, expected timing of satisfaction	1 year
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	$ 26,112
Revenue, remaining performance obligation, expected timing of satisfaction	1 year
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	$ 7,685
Revenue, remaining performance obligation, expected timing of satisfaction	1 year
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	$ 5,137
Revenue, remaining performance obligation, expected timing of satisfaction	1 year
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	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction	1 year

PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total	$ 2,051,124	$ 2,468,607
Less: accumulated depreciation	(684,602)	(770,022)
Property, plant and equipment, net	1,366,522	1,698,585
Gathering and processing systems and related equipment
Property, Plant and Equipment [Line Items]
Total	1,932,418	2,335,980
Construction in progress
Property, Plant and Equipment [Line Items]
Total	42,338	56,064
Land and line fill
Property, Plant and Equipment [Line Items]
Total	11,534	11,534
Other
Property, Plant and Equipment [Line Items]
Total	$ 64,834	$ 65,029

DEFERRED REVENUE (Details) $ in Thousands	6 Months Ended
DEFERRED REVENUE (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Change in Contract with Customer, Liability, Current [Roll Forward]
Current deferred revenue, beginning balance	$ 10,196
Add: additions	3,830
Less: revenue recognized and other	(5,721)
Current deferred revenue, ending balance	8,305
Change in Contract with Customer, Liability, Noncurrent [Roll Forward]
Noncurrent deferred revenue, beginning balance	30,085
Add: additions	3,378
Less: reclassification to current deferred revenue and other	(3,967)
Noncurrent deferred revenue, ending balance	$ 29,496

DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Line of Credit Facility [Line Items]
Less: unamortized debt discount and debt issuance costs	$ (24,088)	$ (31,449)
Total debt, net of unamortized debt discount and debt issuance costs	927,384	1,470,690
Less: current portion of Permian Transmission Term Loan and 2025 Senior Notes redemption	(65,708)	(15,524)
Total long-term debt	861,676	1,455,166
ABL Facility: Summit Holdings' asset based credit facility due May 1, 2026 \| Line of Credit
Line of Credit Facility [Line Items]
Secured notes	0	313,000
Permian Transmission Term Loan and 2025 Senior Notes
Line of Credit Facility [Line Items]
Less: current portion of Permian Transmission Term Loan and 2025 Senior Notes redemption	(65,708)	(15,524)
Permian Transmission Term Loan: Summit Permian Transmission's variable rate senior secured term loan due January 2028
Line of Credit Facility [Line Items]
Term loan	137,225
Permian Transmission Term Loan: Summit Permian Transmission's variable rate senior secured term loan due January 2028 \| Line of Credit
Line of Credit Facility [Line Items]
Term loan	137,225	144,846
2026 Unsecured Notes: $12.00% senior unsecured notes due October 15, 2026 \| Unsecured Debt
Line of Credit Facility [Line Items]
Unsecured notes	$ 0	$ 209,510
Stated interest rate (as a percent)	12.00%
2025 Senior Notes: 5.75% senior unsecured notes due April 15, 2025
Line of Credit Facility [Line Items]
Stated interest rate (as a percent)	5.75%	5.75%
2025 Senior Notes: 5.75% senior unsecured notes due April 15, 2025 \| Senior Notes
Line of Credit Facility [Line Items]
Unsecured notes	$ 49,783	$ 49,783
2026 Secured Notes: 8.50% senior second lien notes due October 15, 2026
Line of Credit Facility [Line Items]
Stated interest rate (as a percent)	8.50%	8.50%
2026 Secured Notes: 8.50% senior second lien notes due October 15, 2026 \| Secured Debt
Line of Credit Facility [Line Items]
Unsecured notes	$ 764,464	$ 785,000

DEBT - Narrative (Details)			1 Months Ended		6 Months Ended
DEBT - Narrative (Details)	Apr. 01, 2024	Mar. 27, 2024 USD ($)	Nov. 30, 2021 USD ($)	Feb. 28, 2017	Jun. 30, 2024 USD ($)	Jun. 07, 2024 USD ($)	May 07, 2024 USD ($)	Nov. 30, 2023 USD ($)	Nov. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Nov. 02, 2021 USD ($)	Mar. 08, 2021 USD ($)
ABL Facility
Debt Instrument [Line Items]
Borrowing capacity					$ 400,000,000						$ 400,000,000
Borrowing base capacity					$ 632,100,000
Mandatory redemption period					120 days
Maximum amount of debt outstanding for maturity to occur					$ 50,000,000
Unused portion under the facility					371,700,000
Debt instrument, covenant, unrestricted cash threshold											$ 200,000,000.0
Interest coverage ratio, thereafter											1.90
First lien net leverage ratio (as a percent)											2.50
ABL Facility \| Exceeds cash threshold
Debt Instrument [Line Items]
Interest coverage ratio											1.50
ABL Facility \| Less than cash threshold
Debt Instrument [Line Items]
Interest coverage ratio											1.75
ABL Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Secured notes					4,300,000
ABL Facility \| Other Credit Facility Reserves
Debt Instrument [Line Items]
Secured notes					24,000,000
2025 Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Unsecured notes					$ 49,800,000
Credit Agreement
Debt Instrument [Line Items]
Borrowing capacity												$ 175,000,000
Applicable margin (as a percent)					2.475%
Interest rate during period (as a percent)					7.79%
Unused portion of the permian transmission credit facility					$ 4,500,000
Commitment fee (as a percent)					0.70%
Credit Agreement \| Summit Permian Transmission, LLC
Debt Instrument [Line Items]
Percentage of debt hedged by interest rate derivatives					90.00%
Credit Agreement \| Summit Permian Transmission, LLC \| Interest Rate Contract
Debt Instrument [Line Items]
Applicable margin (as a percent)					1.23%
Credit Agreement \| Term Loan Credit Facility
Debt Instrument [Line Items]
Borrowing capacity												160,000,000
Credit Agreement \| Working Capital Credit Facility
Debt Instrument [Line Items]
Borrowing capacity												$ 15,000,000
Credit Agreement \| Standby Letters of Credit
Debt Instrument [Line Items]
Unused portion of the permian transmission credit facility					$ 10,500,000
Permian Transmission Term Loan: Summit Permian Transmission's variable rate senior secured term loan due January 2028
Debt Instrument [Line Items]
Applicable margin (as a percent)					2.475%
Interest rate during period (as a percent)					7.79%
2026 Notes
Debt Instrument [Line Items]
Debt offering									$ 85,000,000	$ 700,000,000
Stated interest rate (as a percent)										8.50%
Debt issued as a percent of face value									99.26%	98.50%
Secured Notes Indenture, 2026
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount		100.00%
Debt instrument, principal interest rate			100.00%
Debt instrument, covenant, excess cash flow offer to purchase, period one			$ 50,000,000
Debt instrument, covenant, excess cash flow offer to purchase, basis point increase, period one	0.50%		0.50%
Debt instrument, covenant, excess cash flow offer to purchase, period two			$ 100,000,000
Debt instrument, covenant, excess cash flow offer to purchase, basis point increase, period two			1.00%
Debt instrument, covenant, excess cash flow offer to purchase, period three			$ 200,000,000
Debt instrument, covenant, excess cash flow offer to purchase, basis point increase, period three			2.00%
Debt instrument, cash tender offer		$ 19,300,000					$ 215,000,000
Asset sale offer expired		$ 13,600,000					$ 6,900,000
Debt instrument, interest rate	9.50%
Secured Notes Indenture, 2026 \| Before April 15, 2025
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount			104.25%
Secured Notes Indenture, 2026 \| After April 15, 2025
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount			102.125%
Secured Notes Indenture, 2026 \| Beginning October 15, 2025
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount			100.00%
2026 Unsecured Notes
Debt Instrument [Line Items]
Debt offering								$ 209,500,000
2026 Unsecured Notes \| Summit Holdings And Finance Corporation
Debt Instrument [Line Items]
Debt instrument redemption notice amount						$ 209,500,000
2025 Senior Notes
Debt Instrument [Line Items]
Debt offering								180,000,000
Debt instrument, repurchase amount								29,500,000
Debt instrument, repurchased face amount								$ 29,700,000
2025 Senior Notes \| Beginning October 15, 2025 \| Summit Holdings And Finance Corporation
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount				100.00%

DEBT - Schedule of Maturities of Long-term Debt (Details) - Permian Transmission Term Loan: Summit Permian Transmission's variable rate senior secured term loan due January 2028 $ in Thousands	Jun. 30, 2024 USD ($)
Debt
Amortizing principal repayments	$ 137,225
2024	7,903
2025	16,580
2026	16,967
2027	17,769
2028	$ 78,006

FINANCIAL INSTRUMENTS - Schedule of Carrying and Estimated Fair Values of Debt Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
2025 Senior Notes \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	$ 49,783	$ 49,783
2025 Senior Notes \| Fair Value \| Estimated Fair Value (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	49,451	48,414
2026 Secured Notes \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	764,464	785,000
2026 Secured Notes \| Fair Value \| Estimated Fair Value (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	785,818	778,131
2026 Unsecured Notes \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	0	209,510
2026 Unsecured Notes \| Fair Value \| Estimated Fair Value (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	$ 0	$ 203,225

PARTNERS' CAPITAL AND MEZZANINE CAPITAL - Schedule Of Partner Units Activity (Details) - Common Units	6 Months Ended
	Jun. 30, 2024 shares
Increase (Decrease) in Partners' Capital [Roll Forward]
Units, beginning balance (in shares)	10,376,189
Common units issued for SMLP LTIP, net (in shares)	272,496
Units, ending balance (in shares)	10,648,685

PARTNERS' CAPITAL AND MEZZANINE CAPITAL - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2024	Dec. 31, 2023
Partners Capital [Line Items]
Maximum period following end of quarter to distribute all available cash	45 days
Series A Preferred Units
Partners Capital [Line Items]
Subsidiary Series A preferred unitholders, outstanding (in shares)		65,508	65,508
Subsidiary Series A Preferred Units
Partners Capital [Line Items]
Preferred units outstanding (in shares)		93,039,000	93,039,000
Preferred units issued (in shares)		93,039,000	93,039,000
Series A Preferred Units
Partners Capital [Line Items]
Accrued and unpaid distributions		$ 39.6
Redemption amount		128.8
Issuance costs		$ 1.4	$ 1.7

SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Supplemental cash flow information:
Cash interest paid	$ 65,807	$ 62,587
Cash paid for taxes	15	15
Noncash investing and financing activities:
Capital expenditures in trade accounts payable (period-end accruals)	8,999	8,399
Series A Preferred Units
Noncash investing and financing activities:
Accretion of Subsidiary Series A Preferred Units, net of issuance cost amortization	$ 7,636	$ 5,242

UNIT-BASED AND NONCASH COMPENSATION (Details) - SMLP LTIP $ in Millions		6 Months Ended
	May 16, 2024 shares	Jun. 30, 2024 USD ($) director shares
Phantom Share Units And Associated Distribution Equivalent Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted units (in shares)		230,815
Grant date fair value \| $		$ 3.7
Vesting period		3 years
Performance Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted units (in shares)		122,867
Grant date fair value \| $		$ 2.4
Vesting period		3 years
Common Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value \| $		$ 0.6
Issued units (in shares)	750,000	39,486
Number of directors \| director		6
Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units remaining available (in shares)		900,000
Unvested phantom units granted (in shares)		700,000

COMMITMENTS AND CONTINGENCIES - Schedule of Accrued Environmental Remediation (Details) - Meadowlark Midstream Gathering System $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrued environmental remediation, beginning balance	$ 2,937
Payments made	(598)
Changes in estimates	623
Accrued environmental remediation, ending balance	$ 2,962

COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($) claim	Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Legal fines and other fees	$ 36,300
Claims settled \| claim	1
2015 Blacktail Release
Loss Contingencies [Line Items]
Loss contingency accrual	$ 21,700	$ 21,700
Penalties and fines, payment period	3 years
Unpaid penalties and fines, fixed rate (as a percent)	3.25%
Expected payment	$ 6,700
Claims settled \| claim	1
Pending claims \| claim	2
Natural Resource Damages To Federal and State Governments \| 2015 Blacktail Release
Loss Contingencies [Line Items]
Legal fines and other fees	$ 1,250
Penalties and fines, payment period	5 years
Damages Payable To Federal Government over Five Years \| 2015 Blacktail Release
Loss Contingencies [Line Items]
Legal fines and other fees	$ 25,000
Damages Payable To State Governments Over Six Years \| 2015 Blacktail Release
Loss Contingencies [Line Items]
Legal fines and other fees	$ 10,000
Penalties and fines, payment period	6 years
Damages Payable To Federal Criminal Over Five Years \| 2015 Blacktail Release
Loss Contingencies [Line Items]
Penalties and fines, payment period	5 years

SEGMENT INFORMATION - Schedule of Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Assets	$ 2,032,938	$ 2,494,198
Reportable Segments
Segment Reporting Information [Line Items]
Assets	1,876,441	2,483,258
Reportable Segments \| Rockies
Segment Reporting Information [Line Items]
Assets	905,649	904,974
Reportable Segments \| Permian
Segment Reporting Information [Line Items]
Assets	289,168	291,073
Reportable Segments \| Northeast
Segment Reporting Information [Line Items]
Assets	2,343	573,663
Reportable Segments \| Piceance
Segment Reporting Information [Line Items]
Assets	407,191	431,687
Reportable Segments \| Barnett
Segment Reporting Information [Line Items]
Assets	272,090	281,861
Corporate and Other
Segment Reporting Information [Line Items]
Assets	$ 156,497	$ 10,940

SUBSEQUENT EVENTS - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 30, 2026	Aug. 01, 2024	Jul. 26, 2024	Jul. 17, 2024	Mar. 27, 2024	Jun. 30, 2024	May 07, 2024
Secured Notes Indenture, 2026
Subsequent Event [Line Items]
Redemption price, expressed as percentage of principal amount					100.00%
Debt instrument, cash tender offer					$ 19,300		$ 215,000
ABL Facility
Subsequent Event [Line Items]
Unused portion under the facility						$ 371,700
Subsequent Event \| Senior Secured Second Lien Notes, 2029 \| Summit Holdings And Finance Corporation
Subsequent Event [Line Items]
Debt offering			$ 575,000
Stated interest rate (as a percent)			8.625%
Redemption percentage (as a percent)	40.00%
Redemption price, expressed as percentage of principal amount	108.625%
Subsequent Event \| Senior Secured Second Lien Notes, 2029 \| Summit Holdings And Finance Corporation \| Forecast
Subsequent Event [Line Items]
Redemption percentage (as a percent)	100.00%
Subsequent Event \| Secured Notes Indenture, 2026 \| Summit Holdings And Finance Corporation
Subsequent Event [Line Items]
Redemption price, expressed as percentage of principal amount			102.125%
Repayments of debt			$ 649,800
Debt instrument, notice of redemption on tender offer			114,700
Debt instrument redemption irrevocable deposit			121,200
Subsequent Event \| Secured Notes Indenture, 2025 \| Summit Holdings And Finance Corporation
Subsequent Event [Line Items]
Redemption price, expressed as percentage of principal amount				100.00%
Debt instrument redemption irrevocable deposit			50,600
Debt instrument, cash tender offer				$ 49,800
Subsequent Event \| ABL Facility \| Summit Holdings And Finance Corporation
Subsequent Event [Line Items]
Unused portion under the facility			500,000
Proceeds from sale of other assets			$ 50,000
Aggregate commitments, percentage			10.00%
Subsequent Event \| ABL Facility \| Summit Holdings And Finance Corporation \| Minimum \| Base Rate
Subsequent Event [Line Items]
Applicable margin (as a percent)			1.50%
Subsequent Event \| ABL Facility \| Summit Holdings And Finance Corporation \| Minimum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Subsequent Event [Line Items]
Applicable margin (as a percent)			2.50%
Subsequent Event \| ABL Facility \| Summit Holdings And Finance Corporation \| Maximum
Subsequent Event [Line Items]
Net leverage ratio			2.50
Interest coverage ratio			2.00
Subsequent Event \| ABL Facility \| Summit Holdings And Finance Corporation \| Maximum \| Base Rate
Subsequent Event [Line Items]
Applicable margin (as a percent)			2.25%
Subsequent Event \| ABL Facility \| Summit Holdings And Finance Corporation \| Maximum \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Subsequent Event [Line Items]
Applicable margin (as a percent)			3.25%
Subsequent Event \| Subsidiary Series A Preferred Units
Subsequent Event [Line Items]
Outstanding common stock unit ,converted into right to receive		1.000
Preferred Stock, Liquidation Preference Per Share		$ 1,000
Common Stock \| Subsequent Event
Subsequent Event [Line Items]
Outstanding common stock unit ,converted into right to receive		1.000