9-19-11; The Biggest of the Big U.S. WC Insurers

Business Insurance magazine recently published this list of the U.S. 20 largest workers comp insurers ranked by premium volume.

The number to the right of the company name below represents the insurers' 2010 direct WC premiums written in billions of dollars.

1.    Liberty Mutual Insurance. $4.1

2.    American International Group a/k/a Chartis $3.6

3.    Travelers Companies $2.8

4.    Hartford Financial Services $2.6

5.    Zurich Financial Services Ltd $2.4

6.    The New York State Insurance Fund for Workers' Compensation $1.3

7.    The California State Compensation Insurance Fund $1.1

8.    ACE Ltd. $1.1

9.    Old Republic International $0.9

10.  CNA Financial Corp. $0.8

11.  Accident Fund Group $0.7

12.  Chubb Corp. $0.7

13.  W.R. Berkley Corp. $0.7

14.  Fairfax Financial Holdings Ltd $0.6

15.  Texas Mutual Insurance Co. $0.6

16.  Berkshire Hathaway Inc. $0.5

17.  AmTrust Financial Services Inc $0.5

18.  New Jersey Manufacturers Insurance Co. $0.4

19.  Pinnacol Assurance $0.3

20.  SAIF Corp. $0.3