Arch Mortgage Guaranty Company · NAIC 18732
Where Arch Mortgage Guaranty Company 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.
Arch Mortgage Guaranty Company (NAIC 18732) is a property and casualty insurer domiciled in Wisconsin, part of Arch Insurance Group. State regulators list it as licensed (admitted) in Alaska, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Iowa, Idaho, Illinois, Kentucky, Massachusetts, Maryland, Missouri, North Carolina, North Dakota, Nebraska, New Jersey, Nevada, Ohio, Oklahoma, Oregon, South Carolina, South Dakota, Tennessee, Washington, Wisconsin, Wyoming. It ranked #7 of 9 in Wisconsin mortgage guaranty in 2024 (1.2% share). It ranked #8 of 10 in South Dakota mortgage guaranty in 2025 (0.4% share). It ranked #8 of 9 in Washington mortgage guaranty in 2025 (0.1% 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 Minnesota, Mississippi, Montana, New York, Rhode Island, Utah, 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) | Mortgage guaranty | — | California Department of Insurance, 2026-10-17 |
| Colorado | Admitted (licensed) | Mortgage guaranty | — | Colorado, 2026-10-18 |
| Connecticut | Admitted (licensed) | — | — | Connecticut, 2026-10-18 |
| Delaware | Admitted (licensed) | — | — | Delaware, 2026-10-18 |
| Florida | Admitted (licensed) | — | — | Florida Office of Insurance Regulation, 2026-10-18 |
| Georgia | Admitted (licensed) | General liability, Workers' compensation | — | Georgia, 2026-10-18 |
| Hawaii | Admitted (licensed) | — | — | Hawaii, 2026-10-18 |
| Idaho | Admitted (licensed) | Mortgage guaranty | — | Idaho, 2026-10-18 |
| Illinois | Admitted (licensed) | Mortgage guaranty | — | 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) | — | — | Massachusetts, 2026-10-18 |
| Missouri | Admitted (licensed) | Mortgage guaranty | — | Missouri, 2026-10-18 |
| Nebraska | Admitted (licensed) | — | — | Nebraska, 2026-10-18 |
| Nevada | Admitted (licensed) | General liability, Mortgage guaranty | — | Nevada Division of Insurance, 2026-10-17 |
| New Jersey | Admitted (licensed) | — | — | New Jersey, 2026-10-18 |
| North Carolina | Admitted (licensed) | Mortgage guaranty | — | 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) | Mortgage guaranty | — | Oklahoma, 2026-10-18 |
| Oregon | Admitted (licensed) | Mortgage guaranty | — | Oregon, 2026-10-18 |
| South Carolina | Admitted (licensed) | — | — | South Carolina, 2026-10-18 |
| South Dakota | Admitted (licensed) | Mortgage guaranty | — | South Dakota, 2026-10-18 |
| Tennessee | Admitted (licensed) | — | — | Tennessee, 2026-10-18 |
| Texas | Writes (premium reported) | Mortgage guaranty | — | Texas Department of Insurance, 2026-10-17 |
| Washington | Admitted (licensed) | Mortgage guaranty | — | Washington Office of the Insurance Commissioner and the Surplus Line Association of Washington, 2026-10-17 |
| Wisconsin | Admitted (licensed) | Mortgage guaranty | — | 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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