Top 10 Writers Of Workers' Compensation Insurance By Direct Premiums Written, 2017

($000)

Rank Group/company Direct premiums written (1) Market share (2)
1 Travelers Companies Inc. $4,355,810 7.6%
2 Hartford Financial Services 3,406,913 5.9
3 AmTrust Financial Services  2,920,153 5.1
4 Zurich Insurance Group (3) 2,916,630 5.1
5 Berkshire Hathaway Inc. 2,776,306 4.8
6 Liberty Mutual 2,446,876 4.2
7 Chubb (4) 2,395,588 4.2
8 State Insurance Fund Workers' Comp (NY) 2,277,778 4.0
9 American International Group 1,581,819 2.7
10 Old Republic International Corp. 1,456,600 2.5
(1) Before reinsurance transactions, includes some state funds. (2) Based on U.S. total, includes territories. (3) Data for Farmers Insurance Group of Companies and Zurich Financial Group (which owns Farmers' management company) are reported separately by S&P Global Market Intelligence. (4) Chubb Ltd. data reflect the 2015 merger with Ace Ltd. Source: NAIC data, sourced from S&P Global Market Intelligence, Insurance Information Institute.