Who writes aircraft and aviation in California
Ranked by direct premium written in 2025 from the California Department of Insurance market share report (every company, not a top-N list).
26 companies wrote aircraft and aviation in California in 2025, $268.0M in direct premium. American Alternative Insurance Corporation led with 18.3%; the top five hold 56%.
By Sam Alishahi, independent insurance broker · All lines in California
The companies
| # | Company | NAIC | Home state | Status here | Premium | Share |
|---|---|---|---|---|---|---|
| 1 | American Alternative Insurance Corporation | 19720 | DE | Admitted (licensed) | $49.0M | 18.28% |
| 2 | STARR INDEMNITY \u0026 LIABILITY COMPANY | 38318 | TX | Admitted (licensed) | $33.7M | 12.56% |
| 3 | National Union Fire Insurance Company of Pittsburgh, Pennsylvania | 19445 | PA | Admitted (licensed) | $24.6M | 9.20% |
| 4 | Endurance Assurance Corporation | 11551 | DE | Admitted (licensed) | $22.4M | 8.37% |
| 5 | Westchester Fire Insurance Company | 10030 | PA | Admitted (licensed) | $20.5M | 7.65% |
| 6 | Old Republic Insurance Company | 24147 | PA | Admitted (licensed) | $17.5M | 6.53% |
| 7 | XL Specialty Insurance Company | 37885 | DE | Admitted (licensed) | $11.8M | 4.42% |
| 8 | NATIONAL LIABILITY \u0026 FIRE INSURANCE COMPANY | 20052 | CT | Admitted (licensed) | $11.6M | 4.33% |
| 9 | Ace American Insurance Company | 22667 | PA | Admitted (licensed) | $11.6M | 4.33% |
| 10 | QBE Insurance (Europe) Limited | 39217 | PA | Admitted (licensed) | $11.5M | 4.29% |
| 11 | National Indemnity Company | 20087 | NE | Admitted (licensed) | $8.3M | 3.10% |
| 12 | Allianz Global Risks US Insurance Company | 35300 | IL | Admitted (licensed) | $8.1M | 3.04% |
| 13 | Tokio Marine America Insurance Company | 10945 | NY | Admitted (licensed) | $5.9M | 2.22% |
| 14 | StarStone National Insurance Company | 25496 | DE | Admitted (licensed) | $5.7M | 2.11% |
| 15 | Harco National Insurance Company | 26433 | IL | Admitted (licensed) | $5.6M | 2.09% |
| 16 | Avemco Insurance Company | 10367 | MD | Admitted (licensed) | $5.3M | 1.97% |
| 17 | U.S. Specialty Insurance Company | 29599 | TX | Admitted (licensed) | $5.1M | 1.91% |
| 18 | Pennsylvania Insurance Company | 21962 | NM | Admitted (licensed) | $3.0M | 1.14% |
| 19 | Great American Insurance Company | 16691 | OH | Admitted (licensed) | $2.1M | 0.80% |
| 20 | Falls Lake Fire and Casualty Company | 15884 | CA | Admitted (licensed) | $1.5M | 0.56% |
| 21 | MS Transverse Insurance Company | 21075 | TX | Admitted (licensed) | $1.4M | 0.54% |
| 22 | SiriusPoint America Insurance Company | 38776 | NY | Admitted (licensed) | $792,938 | 0.30% |
| 23 | Invictus Insurance Exchange | 34037 | AZ | Admitted (licensed) | $379,592 | 0.14% |
| 24 | Great American Alliance Insurance Company | 26832 | OH | Admitted (licensed) | $355,008 | 0.13% |
| 25 | Ace Property and Casualty Insurance Company | 20699 | PA | Admitted (licensed) | $37,543 | 0.01% |
| 26 | Coliseum Reinsurance Company | 36552 | DE | Admitted (licensed) | $18,958 | 0.01% |
Method and source
Source: the California Department of Insurance company list, read 2026-10-17 and the surplus lines list. California's company search lists every company on file (all lines, including some no longer active); P&C status comes from the merge. "Premium" is direct premium written in the state for the year shown; "share" is that company's part of the state total for the line. A company can be licensed for a line and write none of it, and a surplus lines insurer can write a line without a state license for it.
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