NAIC 2019 Market Share Report: The Top 25 Workers' Compensation Companies In The U.S.

Berkshire Hathaway is the third largest Workers’ Compensation Insurer in the nation

As it does every March, the National Association of Insurance Commissioners has released its annual market share report of seven of the largest insurance liens in the United States.

For this article, Agency Checklists takes a look at the top 25 Workers’ Compensation Insurers nationwide. The list is based on filings to the N.A.I.C. and represents the largest auto insurers in the land based upon data reported on the State Page of the NAIC’s annual statement for insurers.

Other Take-aways from this year’s list

Connecticut-based insurers Travelers and The Hartford are the top two largest workers’ compensation writers in the U.S. with 13.210% cumulative market share.
The only Massachusetts-based workers’ compensation company to make the list is Liberty Mutual, which actually was founded as a workers’ compensation company back in 1911.

The 2018 list of the top 25 Workers’ Compensation Insurance Companies in the US

Rank	Company Name	Direct Premium Written	Direct Premium Earned	Market Share	Cumulative Market Share
1.	Travelers Group	$4,280,547,306	$4,336,047,920	7.38%	7.38%
2.	Hartford Fires & Cas Group	$3,382,971,956	$3,426,779,546	5.83%	13.21%
3.	Berkshire Hathaway Group	$2,750,359,625	$2,736,514,656	4.74%	17.96%
4.	Zurich Insurance Group	$2,694,390,443	$2,790,243,169	4.65%	22.60%
5.	AmTrust Financial Serv. Group	$2,635,105,822	$2,729,466,638	4.54%	27.15%
6.	Chubb Ltd. Group	$2,478,826,159	$2,537,171,964	4.27%	31.42%
7.	Liberty Mutual Group	$2,473,669,068	$2,363,688,037	4.27%	35.69%
8.	State Ins. Fund	$2,256,137,644	$2,226,408,892	3.89%	39.58%
9.	American Int’l. Group	$1,690,202,488	$1,746,851,929	2.91%	42.49%
10.	BCBS of MI Group	$1,566,914,722	$1,499,749,365	2.70%	45.19%
11.	Old Republic Group	$1,466,818,753 1,	$1,441,121,298	2.53%	47.72%
12.	Erie Ins. WR Berkley Corp. Group	$1,360,656,051	$1,389,052,476	2.35%	50.07%
13.	State Compensation Ins. Fund	$1,338,989,110	$1,348,493,725	2.31%	52.38%
14.	American Financial Group	$1,328,345,427	$1,330,681,469	2.29%	54.67%
15.	CTexas Mutual Ins. Co.	$1,097,243,791	$1,059,925,895	1.89%	56.56%
16.	ICW Group Assets Inc. Group	$958,239,801	$957,887,747	1.65%	58.21%
17.	Fairfax Fin. Group	$928,498,756	$937,174,869	1.60%	59.81%
18.	CNA Ins. Group	$800,609,376	$816,958,709	1.38%	61.19%
19.	Employers Holdings Group	$739,055,629	$727,231,687	1.27%	62.47%
20.	Starr Group	$649,469,823	$627,459,335	1.12%	63.59%
21.	Pinnacol Assur. Group	$623,847,791	$624,273,994	1.08%	64.66%
22.	Arch Ins. Group	$581,503,529	$570,744,057	1.00%	65.67%
23.	Markel Corp. Group	$530,230,382	$537,625,080	0.91%	66.58%
24.	New Jersey Manufacturers Group	$519,826,888	$518,752,566	0.90%	67.48%
25.	Everest Reins Holdings Group	$512,190,645	$497,720,213	0.88%	68.36%