1. State Farm
Direct Premiums Written: $65.6 billion
Market Share: 9.27%


2. Berkshire Hathaway
Direct Premiums Written: $46.1 billion
Market Share: 6.51%


3. Progressive Group
Direct Premiums Written: $39.2 billion
Market Share: 5.54%


4. Liberty Mutual
Direct Premiums Written: $35.6 billion
Market Share: 5.03%


5. Allstate
Direct Premiums Written: $35 billion
Market Share: 4.95%


6. Travelers Group
Direct Written Premiums: $28 billion
Market Share: 3.96%


7. USAA
Direct Written Premiums: $23.4 billion
Market Share: 3.32%


8. Chubb
Direct Written Premiums: $23.3 billion
Market Share: 3.30%


9. Farmers Insurance
Direct Written Premiums: $20.6 billion
Market Share: 2.92%


10. Nationwide
Direct Written Premiums: $18.4 billion
Market Share: 2.60%


11. AIG
Direct Written Premiums: $14 billion
Market Share: 1.98%


12. Zurich
Direct Written Premiums: $12.8 billion
Market Share: 1.82%


13. The Hartford
Direct Written Premiums: $12.6 billion
Market Share: 1.79%


14. American Family Insurance
Direct Written Premiums: $11.5 billion
Market Share: 1.63%


15. CNA
Direct Written Premiums: $11 billion
Market Share: 1.56%


16. Auto-Owners Group
Direct Written Premiums: $8.5 billion
Market Share: 1.21%


17. Assurant
Direct Written Premiums: $8.2 billion
Market Share: 1.16%


18. Erie Insurance
Direct Written Premiums: $7.4 billion
Market Share: 1.06%