The California market, in the open
Who actually writes insurance in California.
No spin. These are the largest writers by 2024 premium, straight from the state regulator’s own filings. Market share is who holds policies today — not who’s taking new customers right now. Knowing that difference is most of the job, and it’s the part a licensed broker checks with you.
- State Farm20.8%
- Farmers15.4%
- Mercury7.1%
- Auto Club (AAA SoCal)6.8%
- CSAA (AAA NorCal)6.8%
- Liberty Mutual6.0%
- USAA5.6%
- Allstate5.2%
- State Farm13.6%
- Auto Club (AAA SoCal)11.6%
- GEICO10.7%
- Allstate9.7%
- CSAA (AAA NorCal)8.4%
- Farmers8.4%
- Progressive6.8%
- Mercury6.5%
Workers’ compensation
- State Fund (SCIF)9.3%
- AmTrust7.8%
- ICW Group6.8%
- Berkshire Hathaway6.4%
- The Hartford6.2%
Commercial property & package
- Farmers15.7%
- Travelers14.8%
- The Hartford7.7%
- Chubb7.4%
- State Farm6.8%
Commercial auto
- Progressive13.1%
- Travelers8.3%
- Berkshire Hathaway6.2%
- Old Republic5.1%
- Mercury4.7%
General liability
- Chubb11.4%
- Travelers8.2%
- CNA4.8%
- AXA4.2%
- State Farm3.9%
Source: California Department of Insurance, 2024 Market Share Report (NAIC data), published April 2025 — the most recent full-year data at the time of writing (reviewed July 2026). Figures reflect 2024 direct written premium; combined lines follow CDI’s own exhibits (auto = liability + physical damage; commercial package = CMP non-liability + liability; general liability = occurrence + claims-made), licensed carriers only. Shown for market context; not an endorsement, ranking of quality, or guarantee of availability. Carriers shown are not necessarily markets Bollinsure places through.