| Name | Country | Market Cap (US$) |
|---|
| AmWINS Brokerage of Texas, Inc. | United States | Private |
| AmWINS Group, Inc | United States | Private |
| ANA Compania de Seguros, S.A. de C.V. | Mexico | Private |
| ANADOLU HAYAT EMEKLILIK A S | Turkey | Private |
| ANALOG DEVICES B.V. | Netherlands | Private |
| Anand Rathi Insurance Brokers | India | Private |
| Anchor General Insurance Company | United States | Private |
| Anchor Holding B.V. | Netherlands | Private |
| Anchor Retail Investments N.V. | Netherlands | Private |
| Anchor Wealth Group Llc | United States | Private |
| Ancillary Care Management Inc | United States | Private |
| Ancon Insurance and Petroleum Casualty Group | United States | Private |
| Ancon Insurance Company (U.K.) Limited | United Kingdom | Private |
| Ancon Insurance Company, Inc. | United States | Private |
| Ancora Versicherungs-Aktiengesellschaft | Germany | Private |
| Anderson Insurance Limited | Canada | Private |
| Andover Companies | United States | Private |
| Andrea Holding B.V. | Netherlands | Private |
| Andrew Weir Insurance Company Limited | United Kingdom | Private |
| Anesthesiologists' Professional Assurance Company | United States | Private |
| ANFI Inc | United States | Private |
| Angelina Casualty Company | United States | Private |
| Anglo American Corporation (Pension Fund) | South Africa | Private |
| Anglo American Insurance Company Limited | United Kingdom | Private |
| Anglo Canada General Insurance Company | Canada | Private |
| Anglo Irish Assurance Company Ltd | Republic of Ireland | Private |
| Ani Investor Holding B.V. | Netherlands | Private |
| Anker Holding B.V. | Netherlands | Private |
| Anker Redersverzekeringen | Netherlands | Private |
| Anna Theresa B.V. | Netherlands | Private |
| Anneborgh Beheermaatschappij B.V. | Netherlands | Private |
| Annuity & Life Reassurance America, Inc. | United States | Private |
| Annuity and Life Reassurance Ltd. | Bermuda | Private |
| Annuity Investors Life Insurance Company | United States | Private |
| Anova Holding B.V. | Netherlands | Private |
| ANP Holding B.V. | Netherlands | Private |
| Anpac | United States | Private |
| ANPAC Louisiana Insurance Company | United States | Private |
| Ansur America Insurance Company | United States | Private |
| Ansvar Insurance Company Ltd. | United Kingdom | Private |
| Ansvar Insurance Ltd. | New Zealand | Private |
| Ansvar Insurance Ltd. | Australia | Private |
| Ansvar Verzekeringsmaatschappij N.V. | Netherlands | Private |
| Answer Financial Inc. | United States | Private |
| Antartida Compania Argentina de Seguros S.A. | Argentina | Private |
| Anteilsverwaltungssparkasse der Waldviertler Sparkasse von 1842 | Austria | Private |
| Antelope Life Assurance Company Limited | United Kingdom | Private |
| Anthem Blue Cross & Blue Shield of Nh Inc | United States | Private |
| Anthem Blue Cross & Blue Shields | United States | Private |
| Anthem Blue Cross Blue Shield Partnership Plan, Inc | United States | Private |
| Anthem Blue Cross Life and Health Insurance Company | United States | Private |
| Anthem Casualty Insurance Group | United States | Private |
| Anthem Health Plans of Kentucky Inc. | United States | Private |
| Anthem Health Plans Of Kentucky, Inc | United States | Private |
| Anthem Health Plans of Maine, Inc. | United States | Private |
| Anthem Health Plans of New Hampshire, Inc. | United States | Private |
| Anthem Health Plans of Virginia Inc. | United States | Private |
| Anthem Health Plans, Inc. | United States | Private |
| Anthem Holding Corp. | United States | Private |
| Anthem Insurance Companies Inc | United States | Private |
| Anthem Life Insurance Company | United States | Private |
| Anthem Midwest Inc | United States | Private |
| Anthem Services, Inc | United States | Private |
| Anthony Veder Investerings Maatschappij B.V. | Netherlands | Private |
| Anthony Veder Rederijzaken B.V. | Netherlands | Private |
| Anthracite Mutual Fire Insurance Company | United States | Private |
| Anticimex Foersaekringar AB | Sweden | Private |
| Antigonish Farmers Mutual Fire Insurance | Canada | Private |
| Antilles Insurance Company | United States | Private |
| Antoniana Veneta Popolare Assicurazioni SpA | Italy | Private |
| Antonides Beheer B.V. | Netherlands | Private |
| Antonissen Beheer B.V. | Netherlands | Private |
| Antonveneta Vita S.p.A | Italy | Private |
| ANZ EXECUTORS & TRUSTEE COMPANY LIMITED | Australia | Private |
| ANZ Lenders Mortgage Insurance Pty Limited | Australia | Private |
| ANZ Life Assurance Company Limited | Australia | Private |
| ANZcover Insurance Pty Limited | Australia | Private |
| AO Artsen-Verzekeringen N.V. | Netherlands | Private |
| Aoba Life Insurance Company Ltd. | Japan | Private |
| AOC Beheer B.V. | Netherlands | Private |
| AOK Allgemeine Ortskrankenkasse | Germany | Private |
| AOMORIKEN MUTUAL AID ASSOCIATION | Japan | Private |
| AON ADJUDICATION SERVICES LTD | United Kingdom | Private |
| AON ALEXANDER HOWDEN LTD | United Kingdom | Private |
| Aon Belgium SA | Belgium | Private |
| AON CONSEIL ET COURTAGE | France | Private |
| Aon Consulting & Insurance Services | United States | Private |
| AON CONSULTING LTD | United Kingdom | Private |
| Aon Consulting Worldwide, Inc | United States | Private |
| Aon Finance N.S.1 ULC | Canada | Private |
| AON FORFAITING LTD | United Kingdom | Private |
| Aon France S.A. | France | Private |
| AON GIL Y CARVAJAL CORREDURIA DE SEGUROS SA | Spain | Private |
| Aon Group Ltd. | United Kingdom | Private |
| Aon Group, Inc | United States | Private |
| Aon Jauch & Hübener GmbH | Germany | Private |
| AON Limited | United Kingdom | Private |
| Aon Ltd | United Kingdom | Private |
| AON Market Services Pty. Ltd. | Australia | Private |
| Aon Portugal - Corretores de Seguros, S.A. | Portugal | Private |
|
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