Top 10 Writers Of Commercial Lines Insurance By Direct Premiums Written, 2024
| 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.
Top 10 Global Insurance Companies By Revenues, 2024 (1)
| 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.
Top 10 Global Insurance Brokers By Revenues, 2024 (1)
| 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.
Top Five Global Reinsurance Brokers By Reinsurance Brokerage and Related Services Revenues, 2024 (1))
| Rank |
Company |
Gross reinsurance revenues |
Country |
| 1 |
Aon’s Reinsurance Solutions |
$2,656.0 |
United Kingdom |
| 2 |
Guy Carpenter & Co. LLC |
2,362.0 |
United States |
| 3 |
Gallagher Re |
1,094.0 |
United States |
| 4 |
Howden Tiger |
600.0 |
United Kingdom/United States |
| 5 |
Lockton Reinsurance |
365.0 |
United States |
(1) Includes all reinsurance revenue reported through holding and/or subsidiary companies.
Source: Business Insurance (www.businessinsurance.com), October 2025.
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.
