Modern two-story house with a pool
Directory · Financial guaranty · Updated 2026-10-18

Financial guaranty insurance companies

Every insurer licensed for financial 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.

7 companies are licensed for financial guaranty in at least one of the loaded states; 1 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

Financial guaranty by state

Largest writers

Who writes the most financial 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
Assured Guaranty Inc.30180MD$43.8MCalifornia, Illinois, Texas
Build America Mutual Assurance Company14380NY$23.5MCalifornia, Illinois, North Carolina, South Dakota, Texas
Ambac Assurance Corporation18708WI$4.9MCalifornia, Illinois, North Carolina, Texas
MBIA Insurance Corporation12041NY$1.5MCalifornia, Texas
Syncora Guarantee, Inc.20311NY$601,638California
All companies

Every insurer licensed for financial guaranty

CompanyNAICHome stateAdmitted inSurplus lines inLines
Ambac Assurance Corporation18708WI310Fidelity bonds, Financial guaranty, General liability +2 more
Assured Guaranty Inc.30180MD340Credit, Fidelity bonds, Financial guaranty +3 more
Build America Mutual Assurance Company14380NY340Fidelity bonds, Financial guaranty, General liability +2 more
MBIA Insurance Corporation12041NY310Fidelity bonds, Financial guaranty, General liability +2 more
MS Transverse Specialty Insurance Company41807TX521Aircraft and aviation, Personal auto, Equipment breakdown +19 more
National Public Finance Guarantee Corporation23825NY320Credit, Fidelity bonds, Financial guaranty +1 more
Syncora Guarantee, Inc.20311NY230Fidelity bonds, Financial guaranty, Surety bonds

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.

Need financial guaranty?

Someone will insure it. I find who.

Send what you need covered and what happened before. I match it to the companies that take it, down to the last-resort plan if it comes to that. I'm licensed in 48 states and Washington, DC and your request stays with my agency, not passed to another agent. In Florida and Washington, where my licenses are still being issued, a partner agency in your state helps in the meantime.

Not shopping yet?

Get a reminder before your renewal.

Tell me when your policy renews and I’ll email you about six weeks before, when it’s worth comparing. One email, no calls.