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Directory · Wisconsin · Surety bonds

Who writes surety bonds in Wisconsin

Ranked by direct premium written in 2024 from the Wisconsin market share report (every company, not a top-N list).

117 companies wrote surety bonds in Wisconsin in 2024, $103.2M in direct premium. Liberty Mutual Insurance Company led with 13.0%; the top five hold 38%. 153 companies are licensed for the line.

By Sam Alishahi, independent insurance broker · All lines in Wisconsin

Top 10 · NAIC table: 24 - Surety

The insurer groups that write the most surety bonds in Wisconsin

Top 10 insurer groups by direct premium written in 2025, from the NAIC's Market Share Reports for Property/Casualty Groups and Companies by State. A group is the parent and its insurance companies together; share is the group's part of the state total for the line; loss ratio is losses incurred over premium earned.

#Insurer groupPremium writtenShareLoss ratioMember companies here
1Liberty Mutual Group$20.7M20.05%10%Safeco Insurance Company of America, Liberty Insurance Underwriters, Inc., Liberty Mutual Fire Insurance Company, Liberty County Mutual Insurance Company
2Cna Insurance Group$10.0M9.69%11%Continental Casualty Company, Continental Insurance Company, (The), American Casualty Company of Reading, Pennsylvania, National Fire Insurance Company of Hartford
3Zurich Insurance Group$7.7M7.43%—Zurich American Insurance Company, Rural Community Insurance Company, American Zurich Insurance Company, American Guarantee and Liability Insurance Company
4Travelers Group$5.7M5.50%11%Travelers Property Casualty Company of America, Standard Fire Insurance Company (The), Travelers Personal Insurance Company, Travelers Casualty and Surety Company of America
5Allianz Insurance Group$4.0M3.89%38%Allianz Global Risks US Insurance Company, Jefferson Insurance Company, Fireman's Fund Insurance Company, AGCS Marine Insurance Company
6Old Republic Group$3.7M3.61%37%Old Republic Insurance Company, Great West Casualty Company, BITCO General Insurance Corporation, Pennsylvania Manufacturers' Association Insurance Company
7Federated Mutual Group$3.7M3.59%—Federated Mutual Insurance Company, Federated Reserve Insurance Company, Federated Service Insurance Company, Granite Re, Inc.
8Axa Insurance Group$3.5M3.40%16%XL Specialty Insurance Company, XL Insurance America, Inc., Greenwich Insurance Company, |Indian Harbor Insurance Company
9West Bend Insurance Group$3.4M3.30%6%West Bend Insurance Company
10Merchants Bonding Co. Group$3.3M3.19%1%Merchants Bonding Company (Mutual), Merchants National Bonding, Inc.
Surety bonds · Wisconsin

The companies

#CompanyNAICHome stateStatus herePremiumShare
1Liberty Mutual Insurance Company23043MAAdmitted (licensed)$13.4M13.03%
2Fidelity and Deposit Company of Maryland (The)39306ILAdmitted (licensed)$8.1M7.89%
3Travelers Casualty and Surety Company of America31194CTAdmitted (licensed)$7.9M7.70%
4Western Surety Company13188SDAdmitted (licensed)$5.3M5.12%
5Old Republic Surety Company40444WIAdmitted (licensed)$4.4M4.23%
6Granite Re, Inc.26310MNAdmitted (licensed)$4.1M3.97%
7Euler Hermes North America Insurance Company20516MDAdmitted (licensed)$4.0M3.83%
8Federal Insurance Company20281INAdmitted (licensed)$3.5M3.38%
9Travelers Casualty and Surety Company19038CTAdmitted (licensed)$3.2M3.06%
10West Bend Insurance Company15350WIAdmitted (licensed)$3.0M2.94%
11Philadelphia Indemnity Insurance Company18058PAAdmitted (licensed)$2.9M2.78%
12XL Specialty Insurance Company37885DEAdmitted (licensed)$2.8M2.76%
13Continental Casualty Company20443ILAdmitted (licensed)$2.8M2.75%
14Ohio Casualty Insurance Company (The)24074NHAdmitted (licensed)$2.4M2.29%
15Merchants National Bonding, Inc.11595IAAdmitted (licensed)$2.4M2.28%
16Evergreen National Indemnity Company12750OHAdmitted (licensed)$2.2M2.16%
17Atlantic Specialty Insurance Company27154NYAdmitted (licensed)$1.8M1.77%
18Hanover Insurance Company (The)22292NHAdmitted (licensed)$1.6M1.55%
19Merchants Bonding Company (Mutual)14494IAAdmitted (licensed)$1.6M1.53%
20Hudson Insurance Company25054DEAdmitted (licensed)$1.6M1.52%
21Selective Insurance Company of America12572NJAdmitted (licensed)$1.3M1.31%
22Cincinnati Insurance Company (The)10677OHAdmitted (licensed)$1.2M1.21%
23Swiss Re Corporate Solutions America Insurance Corporation29874MOAdmitted (licensed)$1.2M1.12%
24Nationwide Mutual Insurance Company23787OHAdmitted (licensed)$1.1M1.04%
25RLI Insurance Company13056ILAdmitted (licensed)$896,9410.87%
26United States Fire Insurance Company21113DEAdmitted (licensed)$862,2800.84%
27AXIS Insurance Company37273ILAdmitted (licensed)$835,4080.81%
28SiriusPoint America Insurance Company38776NYAdmitted (licensed)$821,8060.80%
29Berkley Assurance Company32603DEAdmitted (licensed)$804,9790.78%
30Endurance Assurance Corporation11551DEAdmitted (licensed)$777,9560.75%
31Endurance American Insurance Company10641DEAdmitted (licensed)$685,2030.66%
32Zurich American Insurance Company16535NYAdmitted (licensed)$683,1210.66%
33Capitol Indemnity Corporation10472WIAdmitted (licensed)$664,8930.64%
34Great American Insurance Company16691OHAdmitted (licensed)$662,6710.64%
35Hartford Fire Insurance Company19682CTAdmitted (licensed)$659,9670.64%
36Great Midwest Insurance Company18694TXAdmitted (licensed)$643,0310.62%
37Lexon Insurance Company13307TXAdmitted (licensed)$642,8520.62%
38Everest Reinsurance (Bermuda) Limited -26921DEAdmitted (licensed)$632,3960.61%
39UNITED FIRE \u0026 CASUALTY COMPANY13021IAAdmitted (licensed)$628,9700.61%
40Ohio Farmers Insurance Company24104OHAdmitted (licensed)$594,6260.58%
41EMPLOYERS MUTUAL CASUALTY COMPANY Employers Mutual Casualty Company)21415IAAdmitted (licensed)$504,5370.49%
42Harco National Insurance Company26433ILAdmitted (licensed)$472,0440.46%
43Amerisure Mutual Insurance Company23396MIAdmitted (licensed)$467,0550.45%
44Trisura Insurance Company22225OKAdmitted (licensed)$454,3340.44%
45ASCOT SURETY \u0026 CASUALTY COMPANY30279COAdmitted (licensed)$416,3820.40%
46Arch Insurance (UK) Limited11150MOAdmitted (licensed)$378,2200.37%
47Auto-Owners Insurance Company18988MIAdmitted (licensed)$354,5310.34%
48Pennsylvania National Mutual Casualty Insurance Company14990PAAdmitted (licensed)$274,4530.27%
49Platte River Insurance Company18619NEAdmitted (licensed)$268,1060.26%
50Western National Mutual Insurance Company15377MNAdmitted (licensed)$244,8680.24%
51U.S. Specialty Insurance Company29599TXAdmitted (licensed)$244,5570.24%
52Westchester Fire Insurance Company10030PAAdmitted (licensed)$233,4840.23%
53Developers Surety and Indemnity Company12718CAAdmitted (licensed)$225,3740.22%
54Safeco Insurance Company of America24740NHAdmitted (licensed)$220,0860.21%
55Old Republic Insurance Company24147PAAdmitted (licensed)$163,7780.16%
56Universal Surety Company25933NEAdmitted (licensed)$160,3420.16%
57American Contractors Indemnity Company10216CAAdmitted (licensed)$156,0710.15%
58State Farm Fire and Casualty Company25143ILAdmitted (licensed)$142,9630.14%
59Hartford Accident and Indemnity Company22357CTAdmitted (licensed)$142,5610.14%
60Frankenmuth Insurance Company13986MIAdmitted (licensed)$139,5380.14%
61Swiss Re Corporate Solutuions Premier Insurance Corporation32778MOAdmitted (licensed)$137,1690.13%
62United Casualty and Surety Insurance Company36226NEAdmitted (licensed)$135,6930.13%
63Westfield Insurance Company24112OHAdmitted (licensed)$120,7750.12%
64NGM Insurance Company14788FLAdmitted (licensed)$117,2930.11%
65Accelerant National Insurance Company10220ARAdmitted (licensed)$116,3130.11%
66Sentry Insurance Company24988WIAdmitted (licensed)$107,7140.10%
67IMT Insurance Company14257IAAdmitted (licensed)$107,4130.10%
68Lexington National Insurance Corporation37940FLAdmitted (licensed)$105,9790.10%
69Continental Insurance Company, (The)35289PAAdmitted (licensed)$94,7000.09%
70Great Northern Insurance Company20303INAdmitted (licensed)$94,7000.09%
71Jet Insurance Company17858TXWrites (premium reported)$94,0090.09%
72SureTec Insurance Company10916TXAdmitted (licensed)$91,8420.09%
73Allegheny Casualty Company13285NJAdmitted (licensed)$80,6490.08%
74Great American Alliance Insurance Company26832OHAdmitted (licensed)$76,3270.07%
75Pennsylvania Insurance Company21962NMAdmitted (licensed)$71,4360.07%
76Argonaut Insurance Company19801NEAdmitted (licensed)$53,4990.05%
77Indemnity National Insurance Company18468MSAdmitted (licensed)$50,4390.05%
78Farmington Casualty Company41483CTAdmitted (licensed)$50,0340.05%
79American Bankers Insurance Company of Florida10111FLAdmitted (licensed)$48,6440.05%
80Ohio Indemnity Company26565OHAdmitted (licensed)$46,3320.04%
81Colonial Surety Company10758PAAdmitted (licensed)$44,5730.04%
82Gray Insurance Company (The)36307LAAdmitted (licensed)$42,6700.04%
83Bar Plan Mutual Insurance Company (The)29513MOAdmitted (licensed)$35,5050.03%
84Erie Insurance Company26263PAAdmitted (licensed)$35,2520.03%
85Everspan Insurance Company24961AZAdmitted (licensed)$34,1800.03%
86Pacific Indemnity Company20346DEAdmitted (licensed)$34,0700.03%
87Federated Mutual Insurance Company13935MNAdmitted (licensed)$31,1360.03%
88International Fidelity Insurance Company11592NJAdmitted (licensed)$23,0860.02%
89Berkshire Hathaway Specialty Insurance Company22276NEAdmitted (licensed)$22,4240.02%
90Guarantee Company of North America USA (The)36650ARAdmitted (licensed)$22,1460.02%
91Markel Insurance Company38970ILAdmitted (licensed)$20,5160.02%
92Pekin Insurance Company24228ILAdmitted (licensed)$16,3790.02%
93State National Insurance Company, Inc.12831TXAdmitted (licensed)$14,3550.01%
94American Casualty Company of Reading, Pennsylvania20427PAAdmitted (licensed)$11,8850.01%
95Minnesota Lawyers Mutual Insurance Company42234MNAdmitted (licensed)$10,9280.01%
96Vigilant Insurance Company20397NYAdmitted (licensed)$9,1500.01%
97National Fire Insurance Company of Hartford20478ILAdmitted (licensed)$7,8150.01%
98Bankers Insurance Company33162FLAdmitted (licensed)$6,8250.01%
99National Indemnity Company20087NEAdmitted (licensed)$3,8400.00%
100American States Insurance Company19704INAdmitted (licensed)$3,7000.00%
101RepWest Insurance Company31089AZAdmitted (licensed)$3,1360.00%
102Sentry Select Insurance Company21180WIAdmitted (licensed)$2,9050.00%
103Acstar Insurance Company22950ILAdmitted (licensed)$1,8750.00%
104Star Insurance Company18023MIAdmitted (licensed)$1,7900.00%
105Hartford Insurance Company of the Midwest37478INAdmitted (licensed)$1,4000.00%
106Contractors Bonding and Insurance Company37206ILAdmitted (licensed)$1,2480.00%
107Utica Mutual Insurance Company25976NYAdmitted (licensed)$7500.00%
108St. Paul Fire and Marine Insurance Company24767CTAdmitted (licensed)$4200.00%
109West American Insurance Company44393INAdmitted (licensed)$4000.00%
110Standard Fire Insurance Company (The)19070CTAdmitted (licensed)$3830.00%
111United States Fidelity and Guaranty Company25887CTAdmitted (licensed)$2600.00%
112Protective Insurance Company12416INAdmitted (licensed)$2500.00%
113Aspen American Insurance Company43460TXAdmitted (licensed)$1850.00%
114American Surety Company31380INAdmitted (licensed)$1620.00%
115UNIVERSAL FIRE \u0026 CASUALTY INSURANCE COMPANY32867INAdmitted (licensed)$1360.00%
116North River Insurance Company (The)21105NJAdmitted (licensed)$1200.00%
117American Southern Insurance Company10235KSAdmitted (licensed)$1000.00%
Turned down?

Last resort for surety bonds in Wisconsin

Last resortLinesWhereHow to get in
Surplus lines and Lloyd's open marketallall states, under each state's diligent-search rulesThrough surplus lines wholesalers; commercial property and liability have no guaranteed plan, so this is their last stepSource

Method and source

Source: the Wisconsin insurance regulator company list, read 2026-10-18. Admitted = union of two OCI 2025 Wisconsin Insurance Report documents joined by normalized name: Table E market share (every insurer with 2025 WI premium, all 48 lines incl. life/annuity/A&H; gives NAIC code + lines) and the Directory of Licensed Insurers as of 12/31/2025 (gives domicile, company type, year commenced in WI; no NAIC; https://oci.wi.gov/Documents/AboutOCI/2025_WIR_Directory.pdf). Join stats: {'exact': 1249, 'fuzzy': 3, 'unmatched_xlsx': 2, 'directory_rows': 2281, 'table_e_naic': 1254, 'directory_unmatched': 1029}. Rows with naic '' are directory-only (licensed but no 2025 WI premium or name not matched); rows with type '' are Table E only (name not matched to the directory). Type codes: AR=Accredited Reinsurer; CR=Certified Reinsurer; RJR=Reciprocal Jurisdiction Reinsurer; DSL=Domestic Surplus Line; FR=Fraternal Benefit Society; CC=Continuing Care Organization; CMO=Care Management Organization; HMO=Health Maintenance Organization; IRO=Independent Review Organization; LAH=Life and Accident and Health Company; LSP=Life Settlement Provider; RRG=Risk Retention Group; LSHO=Limited Service Health Organization; MC=Motor Club Plan; SCP=Service Contract Provider; PC=Property and Casualty Company; TI=Title Company; TM=Town Mutual of Wisconsin; VPP=Vehicle Protection Plan; WP=Warranty Plan. Filter P&C with type in {PC, RRG, DSL, TM, TI} or lines among the P&C lines (Table E sheets 34-48: FIRE, FARMOWNERS MULTIPLE PERIL, HOMEOWNERS MULTIPLE PERIL, COMMERCIAL MULTIPLE PERIL, MEDICAL MALPRACTICE, WORKERS COMPENSATION, EXCESS WORKERS COMPENSATION, OTHER LIABILITY, PRIVATE PASSENGER AUTO, COMMERCIAL AUTO, FIDELITY, SURETY, CREDIT, MORTGAGE GUARANTY, TITLE; sheet 33 STOP LOSS/EXCESS LOSS; line strings are the sheet titles, which differ slightly from the TOC). Directory also lists non-insurers (SCP, WP, VPP, MC, LSP, IRO, CC, CMO) and reinsurers (AR, CR, RJR); foreign domiciles are blanked. 'since' = year commenced business in WI. Wisconsin publishes no eligible surplus lines list (NRRA home-state rule; NAIC IID list for aliens), so surplus_lines is empty. "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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