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Top 10 Commercial Insurance Brokers Of U.S. Business By Revenue, 2023 (1)

($ millions)
Rank Company Brokerage revenues
1 Marsh & McLennan Cos. Inc. (1), (2) $10,726
2 Aon PLC (1), (2) 7,744
3 Arthur J. Gallagher & Co. (1), (2) 6,211
4 Willis Towers Watson PLC (1) 4,931
5 Alliant Insurance Services Inc. (1), (2) 3,833
6 Brown & Brown Inc. (1), (2) 3,674
7 Truist Insurance Holdings Inc. (1), (2) 3,392
8 Acrisure LLC (1) 3,382
9 Hub International Ltd. (1), (2) 3,369
10 USI Insurance Services LLC (1), (2) 2,653

(1) Companies that derive more than 49 percent of revenues from personal lines are not ranked.
(2) Reported U.S. acquisitions in 2023.

Source: Business Insurance (www.businessinsurance.com), July/August 2024.

Top 10 Commercial Insurance Brokers Of U.S. Business By Revenue, 2021 (1)

($ millions)
Rank Company Brokerage revenues
1 Marsh & McLennan Cos. Inc. (1), (2) $9,334
2 Aon PLC (1) 5,455
3 Arthur J. Gallagher & Co. (1), (2) 4,667
4 Willis Towers Watson PLC (1), (2) 4,501
5 Brown & Brown Inc. (1), (2) 2,992
6 Truist Insurance Holdings Inc. (1), (2) 2,863
7 Acrisure LLC (1) 2,690
8 Alliant Insurance Services Inc. (1), (2) 2,609
9 Hub International Ltd. (1) 2,420
10 USI Insurance Services LLC (1), (2) 2,149

(1) Companies that derive more than 49 percent of revenues from personal lines are not ranked.
(2) Reported U.S. acquisitions in 2021.

Source: Business Insurance (www.businessinsurance.com), July 2022.

Top 10 Commercial Insurance Brokers Of U.S. Business By Revenue, 2020 (1)

($ millions)
Rank Company Brokerage revenues
1 Marsh & McLennan Cos. Inc. (1), (2) $8,115
2 Aon PLC (1) 5,019
3 Willis Towers Watson PLC  4,643
4 Arthur J. Gallagher & Co. (1) 4,128
5 Brown & Brown Inc. (1) 2,590
6 Truist Insurance Holdings Inc. (1) 2,434
7 Hub International Ltd. (1) 2,077
8 USI Insurance Services LLC (1) 1,929
9 Acrisure LLC (1) 1,871
10 Alliant Insurance Services Inc. (1)  1,778

(1) Companies that derive more than 49 percent of revenues from personal lines are not ranked.
(2) Reported U.S. acquisitions in 2020.
(3) Acquired PayneWest Insurance Inc. on April 21, 2021.

Source: Business Insurance (www.businessinsurance.com), July/August 2021.

Top 10 Commercial Insurance Brokers Of U.S. Business By Revenue, 2019 (1)

($ millions)
Rank Company Brokerage revenues
1 Marsh & McLennan Cos. Inc. (2), (3) $7,934.4
2 Aon PLC 4,982.7
3 Willis Towers Watson PLC (2) 4,291.7
4 Arthur J. Gallagher & Co. (2) 3,944.3
5 Brown & Brown Inc. (2) 2,384.7
6 Truist Insurance Holdings Inc. (2) 2,270.8
7 Hub International Ltd. (2) 1,841.7
8 USI Insurance Services LLC (2) 1,813.0
9 Acrisure LLC (2) 1,716.2
10 Alliant Insurance Services Inc. (2)  1,576.4

(1) Companies that derive more than 49 percent of revenues from personal lines are not ranked.
(2) Reported U.S. acquisitions in 2019.
(3) Acquired Assurance Agency Ltd. on April 1, 2020. Business Insurance estimate of pro forma revenue to reflect acquisition.

Source: Business Insurance (www.businessinsurance.com), July 2020.

Top 10 Commercial Insurance Brokers Of U.S. Business By Revenue, 2018 (1)

($ millions)
Rank Company Brokerage revenues
1 Marsh & McLennan Cos. Inc. (2), (3) $7,524.0
2 Aon PLC (2) 4,654.4
3 Willis Towers Watson PLC  3,954.1
4 Arthur J. Gallagher & Co. (2) 3,574.6
5 BB&T Insurance Holdings Inc. (2) 2,016.3
6 Brown & Brown Inc. (2) 2,009.9
7 Hub International Ltd. (2) 1,674.4
8 USI Insurance Services LLC (2) 1,665.4
9 Alliant Insurance Services Inc. (2) 1,346.2
10 Acrisure LLC (2) 1,323.0

(1) Companies that derive more than 49 percent of revenues from personal lines are not ranked.
(2) Reported U.S. acquisitions in 2018 and 2019.
(3) Pro forma to reflect the acquisition of Jardine Lloyd Thompson Group PLC in April 2019.

Source: Business Insurance (www.businessinsurance.com), July 2019.

Top 10 Commercial Insurance Brokers Of U.S. Business By Revenue, 2017 (1)

($ millions)
Rank Company Brokerage revenues
1 Marsh & McLennan Cos. Inc. (2) $6,877.2
2 Aon P.L.C. (2) 4,411.0
3 Willis Towers Watson P.L.C. 3,814.5
4 Arthur J. Gallagher & Co. (2) 3,132.2
5 BB&T Insurance Holdings Inc. (2) 1,918.3
6 Brown & Brown Inc. (2) 1,857.3
7 USI Insurance Services L.L.C. (2) 1,635.0
8 Hub International Ltd. (2) 1,459.4
9 Lockton Cos. L.L.C. (2), (3) 1,157.6
10 Alliant Insurance Services Inc. (2)  1,123.6

(1) Companies that derive more than 49 percent of revenues from personal lines are not ranked.
(2) Reported U.S. acquisitions in 2017.
(3) Fiscal year ending April 30.

Source: Business Insurance (www.businessinsurance.com), July 2018.

Top 10 Commercial Insurance Brokers Of U.S. Business By Revenue, 2016 (1)

($ millions)
Rank Company Brokerage revenues
1 Marsh & McLennan Cos. Inc. (2) $6,614.5
2 Aon P.L.C. (2) 6,065.9
3 Willis Towers Watson P.L.C.  3,733.4
4 Arthur J. Gallagher & Co. (2) 2,888.4
5 BB&T Insurance Holdings Inc. (2) 1,809.2
6 Brown & Brown Inc. (2) 1,762.8
7 Hub International Ltd. (2) 1,286.1
8 Lockton Cos. L.L.C. (3) 1,054.7
9 USI Insurance Services L.L.C. (2) 1,030.1
10 Wells Fargo Insurance Services USA Inc.  980.8

(1) Companies that derive more than 49 percent of revenues from personal lines are not ranked.
(2) Reported U.S. acquisitions in 2016.
(3) Fiscal year ending April 30.

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

Top 10 Commercial Insurance Brokers Of U.S. Business By Revenue, 2015 (1)

($ millions)
Rank Company Brokerage revenues
1 Marsh & McLennan Cos. Inc. (2) $6,327
2 Aon P.L.C.  6,052
3 Willis Towers Watson P.L.C. (2) 3,981
4 Arthur J. Gallagher & Co. 2,713
5 BB&T Insurance Holdings Inc. 1,676
6 Brown & Brown Inc. 1,657
7 Wells Fargo Insurance Services USA Inc.  1,316
8 Hub International Ltd. 1,147
9 USI Insurance Services L.L.C. 1,028
10 Lockton Cos. L.L.C. (3) 996

(1) Companies that derive less than 50 percent of revenues from commercial retail brokerage or employee benefits are not ranked.
(2) Reported U.S. acquisitions in 2015.
(3) Fiscal year ending April 30.

Source: Business Insurance (www.businessinsurance.com), July 18, 2016.

TOP 10 COMMERCIAL INSURANCE BROKERS OF U.S. BUSINESS BY REVENUE, 2014 (1)

($ millions)
Rank Company Brokerage revenues
1 Marsh & McLennan Cos. Inc. (2) $5,835
2 Aon P.L.C.  5,811
3 Arthur J. Gallagher & Co. (2) 2,400
4 Willis Group Holdings P.L.C. (2) 1,733
5 BB&T Insurance Holdings Inc. (2) 1,714
6 Brown & Brown Inc. (2) 1,567
7 Wells Fargo Insurance Services USA Inc.  1,299
8 USI Holdings Corp. (2) 913
9 Lockton Cos. L.L.C. (3) 911
10 Hub International Ltd. (2) 907

(1) Companies that derive less than 50 percent of revenues from commercial retail brokerage or employee benefits are not ranked.
(2) Reported U.S. acquisitions in 2014.
(3) Fiscal year ending April 30.

Source: Business Insurance (www.businessinsurance.com), July 20, 2015.

TOP TEN COMMERCIAL INSURANCE BROKERS OF U.S. BUSINESS BY REVENUES, 2013 (1)

($ millions)
Rank Company Brokerage revenues
1 Aon P.L.C. $5,561
2 Marsh & McLennan Cos. Inc. (2) 5,522
3 Arthur J. Gallagher & Co. (2) 2,111
4 Willis Group Holdings P.L.C. 1,744
5 BB&T Insurance Holdings Inc. (2) 1,582
6 Brown & Brown Inc. 1,356
7 Wells Fargo Insurance Services USA Inc. 1,350
8 Lockton Cos. L.L.C. (3) 826
9 USI Holdings Corp. (2) 782
10 Hub International Ltd. (2) 769

(1) Companies that derive less than 50 percent of revenues from commercial retail brokerage or employee benefits are not ranked.
(2) Reported U.S. acquisitions in 2013.
(3) Fiscal year ending April 30.

Source: Business Insurance (www.businessinsurance.com), July 21, 2014.

TOP TEN COMMERCIAL INSURANCE BROKERS OF U.S. BUSINESS BY REVENUES, 2012 (1)

($ millions)
Rank Company Brokerage revenues
1 Aon P.L.C. $5,318.0
2 Marsh & McLennan Cos. Inc. 5,300.2
3 Arthur J. Gallagher & Co. 1,908.0
4 Willis Group Holdings P.L.C. 1,625.3
5 Wells Fargo Insurance Services USA Inc. 1,575.4
6 BB&T Insurance Holdings Inc. 1,480.3
7 Brown & Brown Inc. (2) 1,386.4
8 Lockton Cos. L.L.C. (3) 745.3
9 National Financial Partners Corp. 744.2
10 USI Holdings Corp. 712.5

(1) Companies that derive more than 49 percent of revenues from personal lines business are not ranked.
(2) Pro forma to reflect the July 1, 2013 purchase of Beecher Carlson Holdings Inc.
(3) Fiscal year ending April 30.

Source: Business Insurance, July 29, 2013.