Mitsui Sumitomo Insurance USA Inc. · NAIC 22551
Where Mitsui Sumitomo Insurance USA Inc. is admitted, where it's eligible for surplus lines, the lines it's licensed for and how much of each it writes, from state regulators' public lists and market share reports.
Mitsui Sumitomo Insurance USA Inc. (NAIC 22551) is a property and casualty insurer domiciled in New York, part of Ms & Ad Insurance Group. State regulators list it as licensed (admitted) in Alaska, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Iowa, Idaho, Illinois, Kentucky, Massachusetts, Maryland, Minnesota, Missouri, Mississippi, North Carolina, North Dakota, Nebraska, New Jersey, Nevada, New York, Ohio, Oklahoma, Oregon, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Washington, Wisconsin, Wyoming. It ranked #9 of 35 in South Dakota ocean marine in 2025 (3.0% share). It ranked #24 of 75 in California ocean marine in 2025 (1.0% share). It ranked #30 of 81 in Texas ocean marine in 2025 (1.0% share).
By Sam Alishahi, independent insurance broker · All companies
Where it's licensed
States whose regulator lists are loaded: Alaska, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Iowa, Idaho, Illinois, Kentucky, Massachusetts, Maryland, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Jersey, Nevada, New York, Ohio, Oklahoma, Oregon, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Washington, Wisconsin, West Virginia, Wyoming. Not on the lists we have for Montana, West Virginia, which doesn't by itself mean it isn't licensed there.
| State | Status | Lines licensed | Since | Source |
|---|---|---|---|---|
| Alaska | Admitted (licensed) | — | — | Alaska, 2026-10-18 |
| California | Admitted (licensed) | Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Flood, Inland marine, General liability, Ocean marine, Commercial property (fire and allied lines), Workers' compensation | — | California Department of Insurance, 2026-10-17 |
| Colorado | Admitted (licensed) | Aircraft and aviation, Personal auto, Commercial auto, Commercial package (BOP, CMP), Inland marine, General liability, Ocean marine, Commercial property (fire and allied lines), Workers' compensation | — | Colorado, 2026-10-18 |
| Connecticut | Admitted (licensed) | — | — | Connecticut, 2026-10-18 |
| Delaware | Admitted (licensed) | — | — | Delaware, 2026-10-18 |
| Florida | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP), Earthquake, Inland marine, General liability, Medical malpractice, Ocean marine, Commercial property (fire and allied lines), Workers' compensation | — | Florida Office of Insurance Regulation, 2026-10-18 |
| Georgia | Admitted (licensed) | General liability, Commercial property (fire and allied lines), Surety bonds, Workers' compensation | — | Georgia, 2026-10-18 |
| Hawaii | Admitted (licensed) | — | — | Hawaii, 2026-10-18 |
| Idaho | Admitted (licensed) | Fidelity bonds, General liability, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Workers' compensation | — | Idaho, 2026-10-18 |
| Illinois | Admitted (licensed) | Aircraft and aviation, Personal auto, Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Flood, Inland marine, General liability, Ocean marine, Commercial property (fire and allied lines), Umbrella and excess, Workers' compensation | — | Illinois, 2026-10-18 |
| Iowa | Admitted (licensed) | — | — | Iowa, 2026-10-18 |
| Kentucky | Admitted (licensed) | — | — | Kentucky Department of Insurance, 2026-10-17 |
| Maryland | Admitted (licensed) | — | — | Maryland Insurance Administration, 2026-10-17 |
| Massachusetts | Admitted (licensed) | Personal auto, Fidelity bonds, General liability, Surety bonds, Workers' compensation | — | Massachusetts, 2026-10-18 |
| Minnesota | Admitted (licensed) | — | — | Minnesota, 2026-10-18 |
| Mississippi | Admitted (licensed) | Aircraft and aviation, Personal auto, Equipment breakdown, Fidelity bonds, Glass, Inland marine, General liability, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Workers' compensation | 01-01-1989 | Mississippi Insurance Department, 2026-10-17 |
| Missouri | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP), Inland marine, General liability, Ocean marine, Workers' compensation | — | Missouri, 2026-10-18 |
| Nebraska | Admitted (licensed) | — | — | Nebraska, 2026-10-18 |
| Nevada | Admitted (licensed) | General liability, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Workers' compensation | — | Nevada Division of Insurance, 2026-10-17 |
| New Jersey | Admitted (licensed) | — | — | New Jersey, 2026-10-18 |
| New York | Admitted (licensed) | — | — | Excess Line Association of New York (DFS-licensed and eligible excess line insurers), 2026-10-17 |
| North Carolina | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP), Inland marine, General liability, Ocean marine, Commercial property (fire and allied lines), Workers' compensation | — | North Carolina, 2026-10-18 |
| North Dakota | Admitted (licensed) | — | — | North Dakota, 2026-10-18 |
| Ohio | Admitted (licensed) | — | — | Ohio Department of Insurance, 2026-10-17 |
| Oklahoma | Admitted (licensed) | Personal auto, Inland marine, Workers' compensation | — | Oklahoma, 2026-10-18 |
| Oregon | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP), Fidelity bonds, Inland marine, General liability, Ocean marine, Commercial property (fire and allied lines), Umbrella and excess, Workers' compensation | — | Oregon, 2026-10-18 |
| Rhode Island | Admitted (licensed) | — | — | Rhode Island, 2026-10-18 |
| South Carolina | Admitted (licensed) | — | — | South Carolina, 2026-10-18 |
| South Dakota | Admitted (licensed) | Personal auto, Commercial auto, Inland marine, General liability, Ocean marine, Commercial property (fire and allied lines), Workers' compensation | — | South Dakota, 2026-10-18 |
| Tennessee | Admitted (licensed) | — | — | Tennessee, 2026-10-18 |
| Texas | Admitted (licensed) | Aircraft and aviation, Personal auto, Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Credit, Crime (burglary and theft), Farm and crop, Fidelity bonds, Glass, Inland marine, General liability, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Workers' compensation | 1989/02/08 | Texas Department of Insurance, 2026-10-17 |
| Utah | Admitted (licensed) | — | — | Utah, 2026-10-18 |
| Washington | Admitted (licensed) | Ocean marine | — | Washington Office of the Insurance Commissioner and the Surplus Line Association of Washington, 2026-10-17 |
| Wisconsin | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP), Fidelity bonds, General liability, Workers' compensation | — | Wisconsin, 2026-10-18 |
| Wyoming | Admitted (licensed) | — | — | Wyoming, 2026-10-18 |
Method and source
Each row comes from the named regulator's public company list on the date shown, joined by NAIC number. "Admitted" means licensed by the state and backed by its guaranty fund; "surplus lines" means eligible to take risks the admitted market declines, without rate or form approval or guaranty fund protection. Premium and rank come from state market share reports that list every company. This is a public-records directory, not a rating or recommendation; for the company's own filings use the NAIC's Consumer Information Source.
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