15 Largest Insurance Brokers

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The 15 largest insurance brokerages for 2015 are listed below. The rankings are based on revenue earned from clients based in the U.S.  The list is an excerpt of a report published by Insurance Journal, an online insurance news magazine. The report is entitled "100 Largest Brokers of U.S. Business."

Act on Behalf of Buyers

Insurance brokers serve as intermediaries between insurance buyers and insurance companies.

They differ from insurance agents, who sell policies under contractual agreements with insurance companies. Brokers act in the interest of insurance buyers. They have no authority to bind coverage or issue policies. To initiate coverage on behalf of an insurance buyer, a broker must ask an underwriter at the insurer to issue an insurance binder.

Broad Range of Services

Large brokers provide a broad range of services. While the specific services provided vary from broker to broker, many offer the following:

  • Risk management services
  • Loss control services
  • Claims management services
  • Private client services (personal coverages for wealthy individuals)
  • Analytics (such as loss forecasting)
  • Employee benefits

Several of the largest brokers operate worldwide, maintaining offices in numerous foreign countries. Examples are Marsh, AON and Willis.  Others, such as USI and BBT, operate mainly in the United States.

Still others, such as Jardine, conduct much of their business in places other than the U.S.

The Top 15

The largest 15 brokerages are listed in descending order based on 2014 revenue. In its ranking of brokers, Insurance Journal did not include companies that generated more than 49% of their revenue from personal lines business.

Note that the list includes insurance brokerages only. A list of the top 25 insurance agencies is available separately.

In January of 2016, Willis merged with Towers Watson. The combined company, called Willis Towers Watson, is headquartered in London. Because the merger took place in 2016, the two companies appear as separate entities in the list below.



1166 Avenue of the Americas
New York City, New York 10011
Tel.: (212) 345-5000
Website: https://www.marsh.com



Global Headquarters
The Aon Centre
The Leadenhall Building
122 Leadenhall St.
London, England EC3V 4AN
Tel.: +44 (0)20 7623 5500
Fax: +44 (0)20 7621 1511
Website: http://www.aon.com/default.jsp


Arthur J. Gallagher

Global Corporate Headquarters
The Gallagher Centre
2 Pierce Place
Itasca, Il 60143
Tel.: 630.773.3800
Fax: +44 (0) 203 124 8223
Website: http://www.ajg.com



The Willis Building
51 Lime St.
London EC3M 7DQ
Tel. +1 630.773.3800
Website: http://www.willis.com


BB&T Insurance Services

3605 Glenwood Avenue
First Floor
Raleigh, NC 27622-1128
Tel. 919-716-9770
fax: 919-716-9783


Brown & Brown

220 South Ridgewood Ave
Daytona Beach, Florida 32115
Tel.:(386) -252-9601
Website: https://www.bbinsurance.com/


Wells Fargo Insurance Services

150 North Michigan Avenue
Chicago, IL Illinois 60601
Tel. 312-423-2500
Website: https://wfis.wellsfargo.com


USI Holdings Corp

Corporate Office
200 Summit Lake Drive, Suite 350
Valhalla, NY 10595
Tel.:(914) 749-8500
Email: USI.Communications@usi.biz
Website: http://ww2.usi.biz


Lockton Insurance Brokers

444 West 47th St., Suite 900
Kansas City, MO 64112
Tel.: 816-960-9000
Website: http://www.lockton.com


Hub International

Corporate Office
300 N. LaSalle St., 17th Floor
Chicago, IL Illinois 60654
Tel.: 1-312-432-2558
Website: http://www.hubinternational.com


NFP Corp.

340 Madison Avenue
New York, NY 10173
Tel: (212) 867-4787
Website: http://www.nfp.com/

Alliant Insurance Services

1301 Dove St #200
Newport Beach, CA 92660
Tel.:(949) 756-0271
Website: http://www.alliant.com/Pages/default.aspx


AssuredPartners Inc.

200 Colonial Center Parkway, Suite 140
Lake Mary, FL 32746
Tel.: (407) 804-5222
Website: http://www.assuredptr.com

Towers Watson & Co.

Head Office
901 North Glebe Road 
Arlington, VA 22203
Tel.: (703) 258-800
Website: https://www.willistowerswatson.com/en-US


Jardine Lloyd Thompson (JLT) Group

The St. Botolph Building
138 Houndsditch
London, EC3A 7AW
Tel.: 44 20 7528 4444

Website: https://www.jlt.com

Top 10 Global Brokers

The previous list is based on revenue earned from U.S.-based clients. Insurance Journal has published a separate list of the largest ten brokers based on 2014 global revenue. That list includes the following brokers, listed in descending order:

  1. Marsh
  2. AON
  3. Willis
  4. Arthur J. Gallagher
  5. Jardine Lloyd Thompson
  6. BBT
  7. Brown & Brown
  8. Wells Fargo
  9. Hub International
  10. Lockton Cos.