If you're looking for business insurance you have plenty of options for insurers. Here are the largest 50 commercial insurance companies, ranked by market share.
| Rank | Commercial insurance company | Market share % |
|---|---|---|
| 1 | Chubb | 5.52 |
| 2 | Travelers Companies Inc. | 5.49 |
| 3 | Liberty Mutual | 5.12 |
| 4 | American International Group | 4.19 |
| 5 | Zurich | 4.18 |
| 6 | CNA Financial Corp. | 3.27 |
| 7 | Berkshire Hathaway Inc. | 2.94 |
| 8 | Nationwide Mutual Group | 2.65 |
| 9 | Hartford Financial Services | 2.55 |
| 10 | Tokio Marine | 2.12 |
| 11 | American Financial Group Inc. | 1.90 |
| 12 | Assurant Inc. | 1.89 |
| 13 | W. R. Berkley Corp. | 1.86 |
| 14 | AmTrust Financial Services | 1.84 |
| 15 | Fairfax Financial | 1.69 |
| 16 | AXA | 1.50 |
| 17 | State Farm | 1.39 |
| 18 | Old Republic International Corp. | 1.35 |
| 19 | Markel Corp. | 1.32 |
| 20 | Progressive | 1.31 |
| 21 | Farmers Insurance Group of Cos | 1.27 |
| 22 | Allianz | 1.26 |
| 23 | Cincinnati Financial Corp. | 1.21 |
| 24 | FM Global | 1.16 |
| 25 | Arch Capital | 1.15 |
| 26 | QBE | 1.06 |
| 27 | Auto-Owners Insurance | 1.02 |
| 28 | Hanover Insurance Group Inc. | 0.93 |
| 29 | Sompo | 0.86 |
| 30 | Selective Insurance Group Inc. | 0.80 |
| 31 | State Insurance Fund Workers' Comp | 0.75 |
| 32 | STARR Cos. | 0.74 |
| 33 | Allstate Corp. | 0.69 |
| 34 | Erie Insurance | 0.68 |
| 35 | Everest Re | 0.55 |
| 36 | Munich Re | 0.54 |
| 37 | EMC Insurance Cos. | 0.53 |
| 38 | Swiss Re | 0.51 |
| 39 | Argo | 0.49 |
| 40 | AXIS | 0.47 |
| 41 | State Compensation Insurance Fund | 0.45 |
| 42 | Alleghany Corp. | 0.44 |
| 43 | AF Group | 0.44 |
| 44 | USAA | 0.42 |
| 45 | Sentry Insurance a Mutual Co. | 0.42 |
| 46 | Federated Mutual | 0.41 |
| 47 | Westfield Insurance | 0.39 |
| 48 | MGIC Investment Corp. | 0.37 |
| 49 | Aspen | 0.37 |
| 50 | OneBeacon Insurance | 0.36 |
| Source: S&P Global Market Intelligence. Market share based on direct premiums written for commercial insurance in 2017. | ||