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Directory · Mortgage guaranty · Updated 2026-10-18

Mortgage guaranty insurance companies

Every insurer licensed for mortgage guaranty on the state regulator lists loaded so far, with NAIC numbers and where each is admitted or writes surplus lines, plus the largest writers where regulators publish premium by company.

25 companies are licensed for mortgage guaranty in at least one of the loaded states; 0 of them also work as surplus lines insurers somewhere. Pick a state for the ranked list there.

By Sam Alishahi, independent insurance broker · All lines

By state

Mortgage guaranty by state

Largest writers

Who writes the most mortgage guaranty

Direct premium written, summed across the states whose regulators publish every company (California, Illinois, North Carolina, South Dakota, Texas, Wisconsin).

CompanyNAICHome statePremium (those states)Where
Enact Mortgage Insurance Corporation38458NC$309.8MCalifornia, Illinois, North Carolina, South Dakota, Texas, Wisconsin
Mortgage Guaranty Insurance Corporation29858WI$296.6MCalifornia, Illinois, North Carolina, South Dakota, Texas, Wisconsin
Essent Guaranty, Inc.13634PA$294.8MCalifornia, Illinois, North Carolina, South Dakota, Texas, Wisconsin
Radian Guaranty, Inc.33790PA$291.2MCalifornia, Illinois, North Carolina, South Dakota, Texas, Wisconsin
Arch Mortgage Insurance Company40266WI$244.7MCalifornia, Illinois, North Carolina, South Dakota, Texas, Wisconsin
National Mortgage Insurance Corporation13695WI$197.7MCalifornia, Illinois, North Carolina, South Dakota, Texas, Wisconsin
United Guaranty Residential Insurance Company15873NC$21.9MCalifornia, Illinois, North Carolina, South Dakota, Texas
PMI Mortgage Insurance Company27251AZ$4.6MCalifornia, Illinois, North Carolina, South Dakota, Texas, Wisconsin
Arch Mortgage Guaranty Company18732WI$2.9MCalifornia, Illinois, North Carolina, South Dakota, Texas, Wisconsin
Enact Mortgage Insurance Corporation of North Carolina16675NC$2.1MCalifornia, Illinois, North Carolina, South Dakota, Texas, Wisconsin
MGIC Indemnity Corporation18740WI$4,571California, North Carolina, Texas
All companies

Every insurer licensed for mortgage guaranty

CompanyNAICHome stateAdmitted inSurplus lines inLines
Ace American Insurance Company22667PA350Aircraft and aviation, Personal auto, Equipment breakdown +21 more
Allstate Fire and Casualty Insurance Company29688IL320Aircraft and aviation, Personal auto, Equipment breakdown +12 more
Allstate North American Insurance Company11110IL280Aircraft and aviation, Personal auto, Equipment breakdown +12 more
Anza Mortgage Insurance Corporation10287NC230Credit, General liability, Mortgage guaranty +1 more
ARCH Mortgage Assurance Company29114WI250Credit, General liability, Mortgage guaranty +1 more
Arch Mortgage Guaranty Company18732WI290General liability, Mortgage guaranty, Workers' compensation
Arch Mortgage Insurance Company40266WI290Credit, General liability, Mortgage guaranty +1 more
Enact Financial Assurance Corporation37095NC230Credit, General liability, Mortgage guaranty +1 more
Enact Mortgage Insurance Corporation38458NC290Fidelity bonds, General liability, Mortgage guaranty +2 more
Enact Mortgage Insurance Corporation of North Carolina16675NC290Credit, General liability, Mortgage guaranty +1 more
Essent Guaranty, Inc.13634PA290Credit, General liability, Mortgage guaranty +1 more
MGIC Credit Assurance Corporation10682WI130Mortgage guaranty
MGIC Indemnity Corporation18740WI290General liability, Mortgage guaranty, Workers' compensation
Mortgage Guaranty Insurance Corporation29858WI290Credit, General liability, Mortgage guaranty +1 more
National Mortgage Insurance Corporation13695WI300General liability, Mortgage guaranty, Surety bonds
PMI Mortgage Insurance Company27251AZ210Mortgage guaranty
Poseidon Mortgage Guaranty Company40525NC60Mortgage guaranty
Poseidon Structured Mortgage Insurance Company13694NC200General liability, Mortgage guaranty, Workers' compensation
Radian Guaranty, Inc.33790PA290General liability, Mortgage guaranty, Workers' compensation
Radian Mortgage Assurance Inc.30872PA240General liability, Mortgage guaranty, Workers' compensation
Republic Mortgage Assurance Company28452NC80Mortgage guaranty
Republic Mortgage Assurance Company32174NC70Mortgage guaranty
Republic Mortgage Guaranty Insurance Corporation31275NC70Mortgage guaranty
United Guaranty Residential Insurance Company15873NC290General liability, Mortgage guaranty, Workers' compensation
United Guaranty Residential Insurance Company of North Carolina16667NC280Credit, General liability, Mortgage guaranty +2 more

Method and source

"Licensed for" comes from each state regulator's licensed lines on its public company list (grouped into common names); it means the company may write the line in that state, not that it sells it to every customer. Premium comes from the California and Texas market share reports. CSV · JSON.

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