Exhibit 21.1

Subsidiaries of Arthur J. Gallagher & Co.

The following is a list of all of the majority-owned and consolidated subsidiaries of Arthur J. Gallagher & Co. as of December 31, 2024.

Company Name

Domicile

2950 Land Company Manager, LLC

United States

2950 Land Company, LLC

United States

A.C.N. 003 030 180 Pty Ltd

Australia

A.C.N. 061 063 303 Pty Ltd

Australia

A.C.N. 082 459 372 Pty Ltd

Australia

ACE Gallagher Arabia Insurance Brokers Limited

Saudi Arabia

ACE Gallagher Arabia Insurance Consultants Limited

Saudi Arabia

ACE Gallagher Holding W.L.L.

Bahrain

ACE Re Gallagher Arabia Reinsurance Brokers Limited

Saudi Arabia

Acorn Bidco Limited

Guernsey

Acorn Midco 1 Limited

Guernsey

Acorn Midco 2 Limited

Guernsey

Acorn Topco Limited

Guernsey

Adams & Porter Sociedade De Corretagem De Seguros Ltda.

Brazil

AJG (EMEA) LIMITED

United Kingdom

AJG Acquisition Finance Limited

United Kingdom

AJG Cash Holdings Limited

United Kingdom

AJG Financial Services, LLC

United States

AJG Holding (Chile) Spa

Chile

AJG Meadows, LLC

United States

AJG North America ULC

Canada

AJGRMS Of Louisiana, LLC

United States

Alesco Risk Management Services Limited

United Kingdom

Alize Ltd.

Bermuda

Allied Claims Administration, Inc.

United States

Allied Risk Holdings Limited

Ireland

Allied Risk Insurance and Reinsurance Services Limited

Ireland

American Freedom Carriers, Inc.

United States

Another Day Investigations Limited

United Kingdom

Another Day Limited

United Kingdom

Arab Commercial Enterprises Limited

Saudi Arabia

Argentis Financial Group Limited

United Kingdom

Argentis Financial Management Limited

United Kingdom

Artex Advisory & Analytics Ltd.

Bermuda

Artex Axcell (Guernsey) PCC Limited

Guernsey

Artex Axcell PCC (Vermont), Inc.

United States

Artex Axcell PIC Ltd.

Bermuda

Artex Axcell Re (Bermuda) Ltd.

Bermuda

Artex Axcell SEG Ltd.

Bermuda

Artex Corporate Services (Bermuda) Ltd.

Bermuda

Artex Corporate Services (Cayman) Ltd.

Cayman Islands

Artex Corporate Services (Gibraltar) Limited

Gibraltar

Artex Corporate Services (Malta) Limited

Malta

Artex Fund Services Ltd.

Bermuda


Artex Fund Services USA, Inc.

United States

Artex Holdings (Malta) Limited

Malta

Artex ILS Services UK Ltd

United Kingdom

Artex Insurance (Cayman) SPC Limited

Cayman Islands

Artex Insurance (Tennessee) PCCIC, Inc.

United States

Artex Insurance Brokers (Europe) PCC Limited

Malta

Artex Insurance ICC Limited

Guernsey

Artex Insurance Management (Bermuda) Ltd.

Bermuda

Artex Insurance Management (Cayman) Ltd.

Cayman Islands

Artex Insurance Management (Ireland) Limited

Ireland

Artex Intermediaries Ltd.

Bermuda

Artex Risk Solutions (Bermuda) Ltd.

Bermuda

Artex Risk Solutions (Cayman) Limited

Cayman Islands

Artex Risk Solutions (Gibraltar) Limited

Gibraltar

Artex Risk Solutions (Guernsey) Limited

Guernsey

Artex Risk Solutions (International) Limited

Guernsey

Artex Risk Solutions (Ireland) Limited

Ireland

Artex Risk Solutions (Malta) Limited

Malta

Artex Risk Solutions (Singapore) Pte. Ltd.

Singapore

Artex Risk Solutions (UK) Ltd

United Kingdom

Artex Risk Solutions Limited

United Arab Emirates

Artex Risk Solutions, Inc.

United States

Artex Risk Solutions, Inc. (Anguilla)

Anguilla

Artex Services (Private) Limited

Sri Lanka

Arthur J Gallagher (Norway) Holdings AS

Norway

Arthur J Gallagher Brim AB

Sweden

Arthur J Gallagher Nordic AB

Sweden

Arthur J Gallagher Panamá Corredores de Reaseguros SA

Panama

Arthur J Gallagher Proinova AB

Sweden

Arthur J Gallagher Proinova Agency AB

Sweden

Arthur J. Gallagher & Co (AUS) Limited

Australia

Arthur J. Gallagher & Co (NZ) Limited

New Zealand

Arthur J. Gallagher & Co. (Bermuda) Limited

Bermuda

Arthur J. Gallagher (Bermuda) Holding Partnership

Bermuda

Arthur J. Gallagher (Illinois), LLC

United States

Arthur J. Gallagher (Liechtenstein) AG

Liechtenstein

Arthur J. Gallagher (Life Solutions) Pty Ltd

Australia

Arthur J. Gallagher (Schweiz) AG

Switzerland

Arthur J. Gallagher (Singapore) Pte. Ltd.

Singapore

Arthur J. Gallagher (UK) Limited

United Kingdom

Arthur J. Gallagher Asesoria S.A.C.

Peru

Arthur J. Gallagher Australasia Holdings Pty Ltd

Australia

Arthur J. Gallagher Broking (NZ) Limited

New Zealand

Arthur J. Gallagher Canada Limited

Canada

Arthur J. Gallagher Chile Corredores de Reaseguros S.A. (AJG Chile Re)

Chile

Arthur J. Gallagher Corredores de Seguros S.A. (AJG Chile Retail)

Chile

Arthur J. Gallagher Corredores de Seguros S.A. (Colombia)

Colombia

Arthur J. Gallagher Financial Services Professionals Risk Purchasing Group, LLC

United States

Arthur J. Gallagher Holdings (Ireland) Limited

Ireland

Arthur J. Gallagher Holdings (UK) Limited

United Kingdom

Arthur J. Gallagher Insurance Brokers (Ireland) Limited

Ireland

Arthur J. Gallagher Insurance Brokers Limited

United Kingdom


Arthur J. Gallagher Latin America, LLC

United States

Arthur J. Gallagher Peru Corredores de Reaseguros S.A.

Peru

Arthur J. Gallagher Peru Corredores de Seguros S.A.

Peru

Arthur J. Gallagher Re Colombia Ltda. Corredores de Reaseguros SA

Colombia

Arthur J. Gallagher Real Estate Risk Purchasing Group, LLC

United States

Arthur J. Gallagher Risk Management Services, LLC

United States

Arthur J. Gallagher Service Company, LLC

United States

Arthur J. Gallagher Services (UK) Limited

United Kingdom

Ashgrove Insurance Services Limited

United Kingdom

At Squared Holdings Limited

United Kingdom

Aurenda Pty Ltd

Australia

Aurenda Training Services Pty Ltd

Australia

Avantek Pty Ltd

Australia

Axe Insurance PCC Limited

Guernsey

Barnes Commercial Limited

United Kingdom

Bartlett Actuarial, LLC

United States

BCHR UK Holdings Ltd

United Kingdom

BCHR US Acquisitions, Inc.

United States

BCHR US Holdings, Inc.

United States

Beacon Financial Acquisition Corporation

United States

Bellisle Pty. Ltd.

Australia

Benefit Technology Resources, LLC

United States

Blueleaf Consulting Pty Limited

Australia

Bluewater Incorporated Cell Insurance Company

United States

BMM (P&T) Ltd

United Kingdom

Bollinger Insurance Services, Inc.

United States

Bollinger, Inc.

United States

Bollington Insurance Brokers Limited

United Kingdom

Bollington Underwriting Limited

United Kingdom

Bollington Wilson Group Limited

United Kingdom

Bollington Wilson Limited

United Kingdom

Bonus Drive Canada Limited

Canada

Brunswick Financial Group Ltd.

Canada

Buck Canada HR Services Limited/Services RH Buck Canada Limitee

Canada

Buck Capability Centre Private Limited

India

Buck Global, LLC

United States

Buck HR Securities LLC

United States

BVIP (RIH Blocker) Fund IX, Inc.

United States

Caburn Hope Limited

United Kingdom

Cadence Insurance, Inc.

United States

Camco One Ltd

United Kingdom

Capsicum Reinsurance Brokers LLP

United Kingdom

Casanueva Perez II, S.A.P.I. de C.V.

Mexico

Casanueva Perez S.A.P.I. DE CV

Mexico

CGM Gallagher Insurance Brokers (Trinidad & Tobago) Limited

Trinidad and Tobago

Charity First Insurance Services, Inc.

United States

Churchills International Consulting Limited

United Kingdom

Cintran Claims Canada Limited

Canada

CKH Limited

United Kingdom

CLA (Risk Solutions) Limited

United Kingdom

Claims Settlement Agencies Ltd

United Kingdom

Clements Belgium SPRL

Belgium


Clements Europe Limited

United Kingdom

Clements Insurance Services Limited

Ireland

College and University Scholastic Excess Risk Purchasing Group, LLC

United States

Complete Financial Balance Pty Ltd

Australia

Concert Consulting UK Limited

United Kingdom

Copper Mountain Assurance, Inc.

United States

Corporate Services Network Pty Ltd

Australia

Countrywide Accident Assistance Limited

United Kingdom

Dalton Browne Limited

United Kingdom

Dawson & Keenan Insurance Ltd

Canada

Devitt Insurance Services Limited

United Kingdom

Doyle Insurance Brokers (Wexford) Limited

Ireland

Durham & Bates Agencies, Inc.

United States

Education Protect Limited

United Kingdom

Education Protect Northern Ireland Limited

United Kingdom

Education Protect Scotland Limited

United Kingdom

Effectus Consulting Pty Ltd

Australia

Elantis Premium Funding (Nz) Limited

New Zealand

Elantis Premium Funding Limited

Australia

Erimus Group Limited

United Kingdom

Erimus Holdings Teesside Limited

United Kingdom

F Wilson (Holdings) Limited

United Kingdom

F Wilson (Insurance Brokers) Limited

United Kingdom

F Wilson Group Limited

United Kingdom

FE Protect Ltd

United Kingdom

Finergy Solutions Pty Ltd

Australia

First Ireland Risk Management Limited

Ireland

First Premium, Inc.

United States

Fortify Marine Limited

United Kingdom

Fortress Financial Solutions Pty Ltd

Australia

Fortress Insurance LLC

United States

Fraser MacAndrew Ryan Limited

New Zealand

Freeboard Maritime Limited

United Kingdom

Friary Intermediate Limited

United Kingdom

Frontier Financial Services Limited

Bermuda

Gallagher (Administration & Investment) Limited

United Kingdom

Gallagher (Bermuda) Insurance Solutions Ltd.

Bermuda

Gallagher (Malta) Limited

Malta

Gallagher (Shanghai) Insurance Brokers Co. Ltd 上海安睿嘉有限公

China

Gallagher Actuarial Consultants Limited

United Kingdom

Gallagher Affinity Insurance Services, Inc.

United States

Gallagher Argentina Corredores de Reaseguros S.A.

Argentina

Gallagher Bassett Canada Inc.

Canada

Gallagher Bassett Insurance Services Limited

United Kingdom

Gallagher Bassett International Ltd.

United Kingdom

Gallagher Bassett NZ Limited

New Zealand

Gallagher Bassett Services Pty Ltd

Australia

Gallagher Bassett Services Workers Compensation Victoria Pty Ltd

Australia

Gallagher Bassett Services, Inc.

United States

Gallagher Bassett Technical Services, LLC

United States

Gallagher Benefit Services (Canada) Group Inc.

Canada

Gallagher Benefit Services (Holdings) Limited

United Kingdom


Gallagher Benefit Services Management Company Limited

United Kingdom

Gallagher Benefit Services Pty Ltd

Australia

Gallagher Benefit Services, Inc.

United States

Gallagher Benefits Consulting Limited

United Kingdom

Gallagher Brasil Corretora De Resseguros Ltda.

Brazil

Gallagher Brasil Corretora de Seguros Ltda.

Brazil

Gallagher Brasil Holdings Ltda.

Brazil

Gallagher Broker Japan, Inc.

Japan

Gallagher Canada Acquisition Corporation

Canada

Gallagher Caribbean Group Limited

Saint Lucia

Gallagher Clean Energy, LLC

United States

Gallagher Colombia (UK) Holdings Limited

United Kingdom

Gallagher Colombia (UK) Limited

United Kingdom

Gallagher Communication Limited

United Kingdom

Gallagher Consultants (Healthcare) Limited

United Kingdom

Gallagher Consulting Ltda

Colombia

Gallagher Corporate Benefits Pty Ltd

Australia

Gallagher Corporate Services, LLC

United States

Gallagher Energy Risk Services Inc.

Canada

Gallagher European Holdings Limited

United Kingdom

Gallagher Fiduciary Advisors, LLC

United States

Gallagher Global Acquisition Finance Ltd

Bermuda

Gallagher Global Cash Holdings Ltd

Bermuda

Gallagher Global Cash Management Limited

United Kingdom

Gallagher Holdings & Management (EMEA) Ltd

United Kingdom

Gallagher Holdings (UK) Limited

United Kingdom

Gallagher Holdings Japan, Inc.

Japan

Gallagher Insurance Brokers (Barbados) Limited

Barbados

Gallagher Insurance Brokers (Cayman) Limited

Cayman Islands

Gallagher Insurance Brokers (Hong Kong) Limited 安睿嘉爾保險經紀(香港)有限公司

Hong Kong

Gallagher Insurance Brokers (St. Kitts & Nevis) Limited

Saint Kitts and Nevis

Gallagher Insurance Brokers (St. Lucia) Limited

Saint Lucia

Gallagher Insurance Brokers (St. Vincent) Limited

Saint Vincent & the Grenadines

Gallagher Insurance Brokers (Taiwan) Limited

Taiwan

Gallagher Insurance Brokers (Trinidad & Tobago) Limited

Trinidad and Tobago

Gallagher Insurance Brokers Jamaica Limited

Jamaica

Gallagher Insurance Brokers Private Limited

India

Gallagher Interbrok Corretora de Seguros Ltda.

Brazil

Gallagher International Cash Management SRL

Barbados

Gallagher International Finance Limited

Ireland

Gallagher International Holdings (US) Inc.

United States

Gallagher Investment Advisors, LLC

United States

Gallagher IP Solutions LLC

United States

Gallagher Japan, Inc.

Japan

Gallagher Korea Insurance Brokers Limited

Korea (the Republic of)

Gallagher Management Consulting Taiwan Ltd.

Taiwan

Gallagher Mississippi Brokerage, LLC

United States

Gallagher Norway AS

Norway

Gallagher Quebec Compensation Inc.

Canada

Gallagher Re (Nordic) AS

Norway

Gallagher Re (Pty) Limited

South Africa


Gallagher Re (US), LLC

United States

Gallagher Re Bermuda Limited

Bermuda

Gallagher Re Canada Inc.

Canada

Gallagher Re GmbH

Germany

Gallagher Re Inc.

United States

Gallagher Re Insurance Program Solutions, LLC

United States

Gallagher Re Italia S.p.A.

Italy

Gallagher Re Japan K.K.

Japan

Gallagher Re Labuan Limited

Malaysia

Gallagher Re Latin America Corretora de Resseguros Ltda.

Brazil

Gallagher Re Ltd

United Arab Emirates

Gallagher Re S.A.S.

France

Gallagher Reinsurance Australia Limited

Australia

Gallagher Reinsurance Brokers Bermuda Limited

Bermuda

Gallagher Reinsurance Brokers Miami, LLC

United States

Gallagher Risk & Reward Limited

United Kingdom

Gallagher Risk Group LLC

United States

Gallagher Risk Placements Pty Ltd

Australia

Gallagher Securities Europe SAS

France

Gallagher Securities Limited

United Kingdom

Gallagher Securities, Inc.

United States

Gallagher Service Center LLP

India

Gallagher Sigorta Ve Reasurans Brokerligi Anonim Sirketi

Turkey

Gallagher Steel Courier Risk Purchasing Group, Inc.

United States

Gallagher Voluntary Benefits, LLC

United States

Gallagher's Excellence Center for Agencies Limitada

Colombia

Gault Armstrong SARL

New Caledonia

GBCare Texas HCN, LLC

United States

GBCare, LLC

United States

Gbs (Australia) Holdings Pty Ltd

Australia

GBS Administrators, Inc.

United States

GBS Insurance and Financial Services, Inc.

United States

GBS Retirement Services, Inc.

United States

GBS Specialty Markets, LLC

United States

GGB Finance 1 Limited

United Kingdom

GGB Finance 2 Limited

United Kingdom

GGB Finance 5 Limited

United Kingdom

GGB Finance 6 Limited

United Kingdom

GGB Finance Holding Ltd

Bermuda

Global Financial Brokers Limited

Trinidad and Tobago

Goggins Insurance Brokers Limited

Ireland

GPL Assurance Inc.

Canada

Healthcare Professionals Purchasing Group, LLC

United States

Heath Lambert Limited

United Kingdom

Heath Lambert Overseas Limited

United Kingdom

Hexagon Insurance PCC Limited

Guernsey

HFI Benefits Inc.

Canada

HMG - PCMS Limited

United Kingdom

Holdco Re SpA

Chile

Holdco S SpA

Chile

Home And Travel Limited

United Kingdom

Horseshoe Re Limited

Bermuda


Howell & Ryan Limited

Ireland

iBenefit Communication Investments, Inc.

United States

iBenefit Communication, LLC

United States

IBS Reinsurance Brokers Singapore Pte. Ltd.

Singapore

iBTR MidCo, LLC

United States

Implement Compliance Solutions & Resources Limited

United Kingdom

Innovu Bidco Limited

United Kingdom

Innovu Group Holding Company Limited

Ireland

Innovu Operations Limited

Ireland

Insurance Plus Risk Purchasing Group, LLC

United States

I-Protect Underwriting Pty Limited

Australia

isure Pty Ltd

Australia

Keaney Insurance Brokers Limited

Ireland

Köberich Financial Lines GmbH & Co. KG

Germany

Köberich Verwaltungsgesellschaft mbH

Germany

Lifesure Group Limited

United Kingdom

Lifesure Limited

United Kingdom

LRM Wealth Management Pty Ltd

Australia

Lucas Fettes Limited

United Kingdom

MA Underwriting Pty Ltd

Australia

Manchester Underwriting Agencies Limited

United Kingdom

Manchester Underwriting Management Limited

United Kingdom

Matt Jensen Insurance Brokers Limited

New Zealand

MCMM Services Limited

United Kingdom

Mecacem Insurance SPC, Ltd.

Cayman Islands

Mike Henry Insurance Brokers Limited

New Zealand

Mike Henry Insurance Funding Limited

New Zealand

Millennial Properties, LLC

United States

Milne Alexander Pty Ltd

Australia

Momentus Canada Inc.

Canada

Monument Insurance (NZ) Limited

New Zealand

Monument Premium Funding Limited

New Zealand

MPM Finco Pty Ltd

Australia

MUM European Holdings Limited

Malta

Mutual Brokers Pty. Limited

Australia

My Market Place Pty Ltd

Australia

My Plan Manager Group Pty Ltd

Australia

My Plan Manager.com.au Holdings Pty Ltd

Australia

My Plan Manager.com.au Pty Ltd

Australia

National Disability Support Partners Pty Limited

Australia

Nonprofit Insurance Risk Purchasing Group, LLC

United States

Northern Keep Limited

United Kingdom

OAMPS Ltd.

Australia

Offshore Market Placement Limited

New Zealand

Oval EBT Trustees Limited

United Kingdom

Oval Insurance Broking Limited

United Kingdom

Oval Limited

United Kingdom

P.E. Kelly Insurances Limited

Ireland

Pastel Holding (NZ) Company Limited

New Zealand

Pastel Holdings Pty Limited

Australia

Pastel Purchaser (NZ) Limited

New Zealand

Pastel Purchaser Pty Limited

Australia


Pelican Underwriting Management Limited

United Kingdom

PEN Insurance Management Advisors, Ltd.

Bermuda

Pen Underwriting Europe AS

Norway

Pen Underwriting Limited

United Kingdom

Pen Underwriting Pty Ltd

Australia

Premier Insurance Services, Inc.

United States

Professional Agents Risk Purchasing Group, Inc.

United States

Pronto California Agency, LLC

United States

Pronto Franchise, LLC

United States

Pronto General Agency, Inc.

United States

Pronto Insurance Agency of Laredo, Inc.

United States

Pronto Premium Finance, LLC

United States

Property Insurance Initiatives Limited

United Kingdom

Prophet Group Limited

United Kingdom

Prophet Reports & Collections Ltd

United Kingdom

Prophet Trade Credit Ltd

United Kingdom

Public and Non-Profit Excess Risk RPG (PANPER) LLC

United States

Purple Bridge Group Limited

United Kingdom

Quantum Underwriting Solutions Limited

United Kingdom

Quillco 226 Limited

United Kingdom

R.A. Rossborough (Guernsey) Limited

Guernsey

R.A. Rossborough (Insurance Brokers) Limited

Jersey

R.A. Rossborough Limited

Jersey

Real Estate Services Council Risk Purchasing Group, LLC

United States

Redington Limited

United Kingdom

Rentguard Limited

United Kingdom

Resilience Re Ltd.

Bermuda

RGA Referencing Limited

United Kingdom

RGA Underwriting Limited

United Kingdom

RIBA Insurance Agency Limited

United Kingdom

RIBV Holdings, LLC

United States

RIL Administrators (Guernsey) Limited

Guernsey

Risk Capital Funding, LLC

United States

Risk International Benefits Advisors, LLC

United States

Risk International Captive Managers, Inc.

United States

Risk International Holdings, LLC

United States

Risk International Services, LLC

United States

Risk Management Partners Ltd.

United Kingdom

Risk Placement Services, Inc.

United States

Risk Program Administrators LLC

United States

Risk-Albert Holdco LLC

United States

Rossborough Healthcare International Limited

Guernsey

Rossborough Insurance (IOM) Limited

Isle of Man

Scholastic First Risk Purchasing Group, LLC

United States

Sentinel Indemnity, LLC

United States

Septagon Insurance PCC Limited

Guernsey

Simply-Communicate Limited

United Kingdom

Smeri AB

Sweden

Srila Systems (Private) Limited

Sri Lanka

Stackhouse Poland Bidco Limited

United Kingdom

Stackhouse Poland Group Limited

United Kingdom

Stackhouse Poland Holdings Ltd

United Kingdom


Stackhouse Poland Limited

United Kingdom

Stackhouse Poland Midco Limited

United Kingdom

Star Newco Limited

United Kingdom

Stormclose Limited

United Kingdom

Strata Solicitors Ltd

United Kingdom

Super Advice Corporate Services Pty Ltd

Australia

Talbot Deane Investments Limited

United Kingdom

Tay River Holdings Ltd

United Kingdom

Teesside Insurance Consultants Limited

United Kingdom

THB Chile Servicios Administrativos SpA

Chile

THB Corredores de Reaseguro S.A.

Chile

THB Corredores de Seguro S.A.

Chile

The Bollington Group (Holdings) Limited

United Kingdom

The EHE Group, LLC

United States

The Rowley Agency, LLC

United States

The Wright Agency Limited

United Kingdom

Total Benefit Specialists Limited

Trinidad and Tobago

Towerhill Insurance Underwriters Inc.

Canada

Trafalgar Marine Trades Limited

United Kingdom

Travel Agents Risk Purchasing Group, Inc.

United States

Uni-Care, Inc.

United States

Vessel Protect Limited

United Kingdom

VIA Financial Group Pty Ltd

Australia

Watson Laurie Holdings Ltd

United Kingdom

Watson Laurie Ltd

United Kingdom

Wexford Financial Services Limited

Ireland

Wexford Insurances Group Limited

Ireland

WHTC Ltd

United Kingdom

William Cullen And Sons Limited

Ireland

WIM Corretora De Seguros Ltda.

Brazil

WorldSmart Association, Inc.

United States

Wrightway Underwriting Limited

Ireland

Zettai Pty Ltd

Australia