Michigan's top 20

June 28, 2009
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The top 20 commercial insurers that write workers’ compensation policies in Michigan collect an estimated annual premium of more than $735 million and combine for roughly 75 percent of that market.

Here are those top 20, ranked by the estimated annual premium and overall market share in Michigan.


Group Name
Accident Fund Insurance Co.
American International Group
Liberty Mutual Companies
Hartford Fire & Casualty Group
Auto Owners Insurance Group
The St. Paul Travelers Cos.
Frankenmuth Mutual Insurance Co.
Zurich/Maryland Insurance Cos.
Mich. Commercial Insurance Mutual
Amerisure Cos.
The Hanover Insurance Group
Hastings Mutual Insurance Co.
Michigan Insurance Co.
Mich. Farm Bureau Insurance Co.
Cincinnati Insurance Cos.
CNA Insurance Group
Chubb Group
Ace American Insurance Cos.
Indiana Insurance Group
American Compensation Insurance Co.
Totals

Total Estimated
Annual Premium

$207,660,478
$82,183,612
$69,088,470
$45,321,305
$44,227,222
$41,198,874
$36,137,514
$32,016,426
$30,256,679
$28,170,185
$28,105,857
$26,829,924
$24,880,364
$21,308,145
$21,072,215
$20,925,154
$20,326,428
$14,002,599
$12,343,356
$11,226,853
$735,008,048

Percentage of
Market Share

20.95%
8.27%
6.97%
4.56%
4.46%
4.16%
3.64%
3.21%
3.05%
2.84%
2.84%
2.71%
2.51%
2.15%
2.12%
2.11%
2.05%
1.41%
1.24%
1.13%
74.11%


Source: Michigan Office of Financial and Insurance Regulation, “The State of Competition in the Workers’ Compensation Insurance Market in the State of Michigan,” May 2009
 

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