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Commercial Insurance

Top 10 Writers Of Commercial Lines Insurance By Direct Premiums Written, 2024

($000)

Rank Group/company Direct premiums written (1) Market share (2)
1 Travelers Companies Inc. $26,232,201 5.2%
2 Chubb Ltd. 26,123,774 5.2
3 Liberty Mutual 19,970,975 4.0
4 Berkshire Hathaway Inc. 19,202,724 3.8
5 Zurich Insurance Group 17,991,721 3.6
6 American International Group (AIG) 14,151,844 2.8
7 Hartford Financial Services 13,829,345 2.8
8 CNA Financial Corp. 13,450,851 2.7
9 Progressive 12,547,795 2.5
10 Tokio Marine 10,255,294 2.1

(1) Before reinsurance transactions, includes state funds.
(2) Based on U.S. total, excluding territories.

Source: NAIC data, sourced from S&P Global Market Intelligence, Insurance Information Institute.

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Top 10 Global Insurance Companies By Revenues, 2024 (1)

(US$ millions)

Rank Company Revenues Country Industry
1 Berkshire Hathaway $371,433 United States Property/casualty
2 China Life Insurance 160,277 China Life/health
3 Ping An Insurance 158,627 China Life/health
4 Allianz 123,148 Germany Life/health
5 State Farm Insurance 122,951 United States Property/casualty
6 Life Insurance Corp. of India 104,971 India Life/health
7 AXA 98,686 France Life/health
8 People's Insurance Co. of China 86,478 China Property/casualty
9 Progressive 75,372 United States Property/casualty
10 Japan Post Holdings 75,230 Japan Life/health

(1) Based on an analysis of companies in the Global Fortune 500. Includes stock and mutual companies.

Source: Fortune.

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Top 10 Global Insurance Brokers By Revenues, 2024 (1)

(US$ millions)

Rank Company Brokerage revenues Country
1 Marsh & McLennan Cos. Inc. (2) $25,331 United States
2 Aon PLC (3) 15,382 Ireland
3 Arthur J. Gallagher & Co.  11,082 United States
4 Willis Towers Watson PLC  9,739 United Kingdom
5 Alliant Insurance Services, Inc. 4,996 United States
6 Hub International Ltd.  4,768 United States
7 Brown & Brown Inc. 4,705 United States
8 Acrisure LLC 3,953 United States
9 Lockton Cos. LLC (2) (4) 3,938 United States
10 Howden Insurance Brokers Ltd. (5) 3,773 United Kingdom

(1) Revenue generated by insurance brokerage and related services.
(2) Acquisition of McGriff Insurance Services November 15, 2024.
(3) Acquisition of NFP Corp. April 24, 2024.
(4) Fiscal year ending April 30, 2024.
(5) Fiscal year ending September 30, 2024

Source: Business Insurance (www.businessinsurance.com), June/July 2025.

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Top Five Global Reinsurance Brokers By Reinsurance Brokerage and Related Services Revenues, 2022 (1))

(US$ millions)

Rank Company Gross reinsurance revenues Country
1 Aon's Reinsurance Solutions $2,190.0 United Kingdom
2 Guy Carpenter & Co. LLC  2,020.0 United States
3 Gallagher Re  896.9 United States
4 Howden Tiger (2) 400.0 United Kingdom/United States
5 Miller Insurance Services LLP 247.4 United Kingdom

(1) Includes all reinsurance revenue reported through holding and/or subsidiary companies.
(2) Formerly Howden Re and TigerRisk Partners LLC

Source: Business Insurance (www.businessinsurance.com), October 2023.

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Top 10 U.S.-Based Surplus Lines Insurance Companies By Nonadmitted Direct Premiums Written, 2016 (1)

Rank Company Parent Nonadmitted direct written premiums
1 Lexington Insurance Co. American International Group lnc. $3,072,090,784
2 Nationwide Mutual Insurance Co. (2) Nationwide Mutual Insurance Co. 1,677,321,986
3 Chubb LTD. (3) Chubb LTD. 1,486,045,491
4 (AEGIS) Associated Electric & Gas Ins. Services Inc. AEGIS 1,236,475,000
5 Markel Corp. Markel Corp. 1,234,126,766
6 Liberty Mutual Holding Co. Inc. (4) Liberty Mutual Insurance 1,206,000,000
7 Steadfast Insurance Co. Zurich Insurance Group Ltd. 1,075,923,941
8 Indian Harbor Insurance Co. XL Group P.L.C. 928,755,594
9 National Fire & Marine Insurance Co. Berkshire Hathaway Reinsurance Group 901,676,070
10 AIG Specialty Insurance Co. American International Group lnc. 724,617,049

(1) Excludes Lloyd's of London syndicates.
(2) Formerly Scottsdale Insurance Company and Western Heritage Insurance Company.
(3) Includes Westchester Surplus Lines Insurance Co., Illinois Union Insurance Co., Chubb Custom Insurance Co. and Executive Risk Specialty Insurance Co.
(4) Acquired Ironshore Specialty Insurance Co.

Source: Business Insurance (www.businessinsurance.com), September 2017.

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