| Rank |
Group |
Direct premiums written (1) |
Market share |
| 1 |
State Farm Mutual Automobile Insurance |
$31,132,669 |
18.7% |
| 2 |
Allstate Corp. |
16,987,898 |
10.2 |
| 3 |
Berkshire Hathaway Inc. |
14,179,673 |
8.5 |
| 4 |
Progressive Corp. |
12,845,461 |
7.7 |
| 5 |
Zurich Financial Services Ltd. |
9,943,802 |
6.0 |
| 6 |
Liberty Mutual Holding Co. |
7,500,758 |
4.5 |
| 7 |
USAA Insurance Group |
7,268,980 |
4.4 |
| 8 |
Nationwide Mutual Group |
7,037,229 |
4.2 |
| 9 |
Travelers Companies |
3,512,489 |
2.1 |
| 10 |
American Family Mutual Insurance Co. |
3,227,718 |
1.9 |
(1) Before reinsurance transactions, excluding state funds.
Source: SNL Financial LC. |