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Top 20 largest workers compensation insurers

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SNL Financial provided Business Insurance a list of the 20 largest workers comp insurers ranked by premium volume.

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

Here it is:

1. Liberty Mutual Holding Co. $4.1

2.American International Group $3.6

3.Travelers Cos $2.8

4.Hartford Financial Services $2.6

5.Zurich Financial Services Ltd $2.4

6State Ins Fund Workers' Comp (NY) $1.3

7.State Compensation Ins Fund (CA) $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. NJ Manufacturers Ins Co. $0.4

19. Pinnacol Assurance $0.3

20. SAIF Corp. $0.3

Comp Time thanks Kevin Edison, Business Insurance's research director, for obtaining the information from SNL Financial