Who writes aircraft and aviation in Washington
The 28 largest writers by premium in 2025 from the Washington Office of the Insurance Commissioner and the Surplus Line Association of Washington market report (a top-28 list, shares of earned premium).
The 28 largest writers of aircraft and aviation in Washington in 2025: STARR INDEMNITY \u0026 LIABILITY COMPANY led with 20.3% of the state's premium; the top five hold 55%.
By Sam Alishahi, independent insurance broker · All lines in Washington
The companies
| # | Company | NAIC | Home state | Status here | Premium | Share |
|---|---|---|---|---|---|---|
| 1 | STARR INDEMNITY \u0026 LIABILITY COMPANY | 38318 | TX | Admitted (licensed) | $11.7M | 20.32% |
| 2 | National Union Fire Insurance Company of Pittsburgh, Pennsylvania | 19445 | PA | Admitted (licensed) | $7.1M | 12.31% |
| 3 | Old Republic Insurance Company | 24147 | PA | Admitted (licensed) | $5.4M | 9.41% |
| 4 | American Alternative Insurance Corporation | 19720 | DE | Admitted (licensed) | $3.9M | 6.72% |
| 5 | Endurance American Insurance Company | 10641 | DE | Admitted (licensed) | $3.5M | 6.09% |
| 6 | Allianz Global Risks US Insurance Company | 35300 | IL | Admitted (licensed) | $3.4M | 5.94% |
| 7 | NATIONAL LIABILITY \u0026 FIRE INSURANCE COMPANY | 20052 | CT | Admitted (licensed) | $2.4M | 4.22% |
| 8 | Ace American Insurance Company | 22667 | PA | Admitted (licensed) | $2.4M | 4.22% |
| 9 | Great American Insurance Company | 16691 | OH | Admitted (licensed) | $2.4M | 4.15% |
| 10 | Avemco Insurance Company | 10367 | MD | Admitted (licensed) | $1.8M | 3.20% |
| 11 | XL Specialty Insurance Company | 37885 | DE | Admitted (licensed) | $1.8M | 3.04% |
| 12 | QBE Insurance (Europe) Limited | 39217 | PA | Admitted (licensed) | $1.4M | 2.52% |
| 13 | Continental Indemnity Company | 28258 | NM | Admitted (licensed) | $1.4M | 2.43% |
| 14 | U.S. Specialty Insurance Company | 29599 | TX | Admitted (licensed) | $1.1M | 1.88% |
| 15 | Harco National Insurance Company | 26433 | IL | Admitted (licensed) | $1.1M | 1.85% |
| 16 | Westchester Fire Insurance Company | 10030 | PA | Admitted (licensed) | $964,000 | 1.68% |
| 17 | National Indemnity Company | 20087 | NE | Admitted (licensed) | $916,000 | 1.59% |
| 18 | HDI Global Select Insurance Company | 14265 | IL | Admitted (licensed) | $843,000 | 1.46% |
| 19 | StarStone National Insurance Company | 25496 | DE | Admitted (licensed) | $630,000 | 1.09% |
| 20 | Tokio Marine America Insurance Company | 10945 | NY | Admitted (licensed) | $629,000 | 1.09% |
| 21 | MS Transverse Insurance Company | 21075 | TX | Admitted (licensed) | $604,000 | 1.05% |
| 22 | Falls Lake National Insurance Company | 31925 | OH | Admitted (licensed) | $539,000 | 0.94% |
| 23 | American Commerce Insurance Company | 19941 | OH | Admitted (licensed) | $509,000 | 0.88% |
| 24 | Obsidian Pacific Insurance Company | 26395 | DE | Admitted (licensed) | $479,000 | 0.83% |
| 25 | Imperium Insurance Company | 35408 | TX | Admitted (licensed) | $239,000 | 0.42% |
| 26 | SiriusPoint America Insurance Company | 38776 | NY | Admitted (licensed) | $235,000 | 0.41% |
| 27 | Great American Alliance Insurance Company | 26832 | OH | Admitted (licensed) | $142,000 | 0.25% |
| 28 | Ace Property and Casualty Insurance Company | 20699 | PA | Admitted (licensed) | $7,000 | 0.01% |
Method and source
Source: the Washington Office of the Insurance Commissioner and the Surplus Line Association of Washington company list, read 2026-10-17 and the surplus lines list. Washington's authorized list comes from the OIC's 2025 market report (Appendix D), which leaves out authorized companies with no premium that year. Premiums are in thousands. "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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