
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
The companies
| # | Company | NAIC | Home state | Status here | Premium | Share |
|---|---|---|---|---|---|---|
| 1 | Liberty Mutual Insurance Company | 23043 | MA | Admitted (licensed) | $13.4M | 13.03% |
| 2 | Fidelity and Deposit Company of Maryland (The) | 39306 | IL | Admitted (licensed) | $8.1M | 7.89% |
| 3 | Travelers Casualty and Surety Company of America | 31194 | CT | Admitted (licensed) | $7.9M | 7.70% |
| 4 | Western Surety Company | 13188 | SD | Admitted (licensed) | $5.3M | 5.12% |
| 5 | Old Republic Surety Company | 40444 | WI | Admitted (licensed) | $4.4M | 4.23% |
| 6 | Granite Re, Inc. | 26310 | MN | Admitted (licensed) | $4.1M | 3.97% |
| 7 | Euler Hermes North America Insurance Company | 20516 | MD | Admitted (licensed) | $4.0M | 3.83% |
| 8 | Federal Insurance Company | 20281 | IN | Admitted (licensed) | $3.5M | 3.38% |
| 9 | Travelers Casualty and Surety Company | 19038 | CT | Admitted (licensed) | $3.2M | 3.06% |
| 10 | West Bend Insurance Company | 15350 | WI | Admitted (licensed) | $3.0M | 2.94% |
| 11 | Philadelphia Indemnity Insurance Company | 18058 | PA | Admitted (licensed) | $2.9M | 2.78% |
| 12 | XL Specialty Insurance Company | 37885 | DE | Admitted (licensed) | $2.8M | 2.76% |
| 13 | Continental Casualty Company | 20443 | IL | Admitted (licensed) | $2.8M | 2.75% |
| 14 | Ohio Casualty Insurance Company (The) | 24074 | NH | Admitted (licensed) | $2.4M | 2.29% |
| 15 | Merchants National Bonding, Inc. | 11595 | IA | Admitted (licensed) | $2.4M | 2.28% |
| 16 | Evergreen National Indemnity Company | 12750 | OH | Admitted (licensed) | $2.2M | 2.16% |
| 17 | Atlantic Specialty Insurance Company | 27154 | NY | Admitted (licensed) | $1.8M | 1.77% |
| 18 | Hanover Insurance Company (The) | 22292 | NH | Admitted (licensed) | $1.6M | 1.55% |
| 19 | Merchants Bonding Company (Mutual) | 14494 | IA | Admitted (licensed) | $1.6M | 1.53% |
| 20 | Hudson Insurance Company | 25054 | DE | Admitted (licensed) | $1.6M | 1.52% |
| 21 | Selective Insurance Company of America | 12572 | NJ | Admitted (licensed) | $1.3M | 1.31% |
| 22 | Cincinnati Insurance Company (The) | 10677 | OH | Admitted (licensed) | $1.2M | 1.21% |
| 23 | Swiss Re Corporate Solutions America Insurance Corporation | 29874 | MO | Admitted (licensed) | $1.2M | 1.12% |
| 24 | Nationwide Mutual Insurance Company | 23787 | OH | Admitted (licensed) | $1.1M | 1.04% |
| 25 | RLI Insurance Company | 13056 | IL | Admitted (licensed) | $896,941 | 0.87% |
| 26 | United States Fire Insurance Company | 21113 | DE | Admitted (licensed) | $862,280 | 0.84% |
| 27 | AXIS Insurance Company | 37273 | IL | Admitted (licensed) | $835,408 | 0.81% |
| 28 | SiriusPoint America Insurance Company | 38776 | NY | Admitted (licensed) | $821,806 | 0.80% |
| 29 | Berkley Assurance Company | 32603 | DE | Admitted (licensed) | $804,979 | 0.78% |
| 30 | Endurance Assurance Corporation | 11551 | DE | Admitted (licensed) | $777,956 | 0.75% |
| 31 | Endurance American Insurance Company | 10641 | DE | Admitted (licensed) | $685,203 | 0.66% |
| 32 | Zurich American Insurance Company | 16535 | NY | Admitted (licensed) | $683,121 | 0.66% |
| 33 | Capitol Indemnity Corporation | 10472 | WI | Admitted (licensed) | $664,893 | 0.64% |
| 34 | Great American Insurance Company | 16691 | OH | Admitted (licensed) | $662,671 | 0.64% |
| 35 | Hartford Fire Insurance Company | 19682 | CT | Admitted (licensed) | $659,967 | 0.64% |
| 36 | Great Midwest Insurance Company | 18694 | TX | Admitted (licensed) | $643,031 | 0.62% |
| 37 | Lexon Insurance Company | 13307 | TX | Admitted (licensed) | $642,852 | 0.62% |
| 38 | Everest Reinsurance (Bermuda) Limited - | 26921 | DE | Admitted (licensed) | $632,396 | 0.61% |
| 39 | UNITED FIRE \u0026 CASUALTY COMPANY | 13021 | IA | Admitted (licensed) | $628,970 | 0.61% |
| 40 | Ohio Farmers Insurance Company | 24104 | OH | Admitted (licensed) | $594,626 | 0.58% |
| 41 | EMPLOYERS MUTUAL CASUALTY COMPANY Employers Mutual Casualty Company) | 21415 | IA | Admitted (licensed) | $504,537 | 0.49% |
| 42 | Harco National Insurance Company | 26433 | IL | Admitted (licensed) | $472,044 | 0.46% |
| 43 | Amerisure Mutual Insurance Company | 23396 | MI | Admitted (licensed) | $467,055 | 0.45% |
| 44 | Trisura Insurance Company | 22225 | OK | Admitted (licensed) | $454,334 | 0.44% |
| 45 | ASCOT SURETY \u0026 CASUALTY COMPANY | 30279 | CO | Admitted (licensed) | $416,382 | 0.40% |
| 46 | Arch Insurance (UK) Limited | 11150 | MO | Admitted (licensed) | $378,220 | 0.37% |
| 47 | Auto-Owners Insurance Company | 18988 | MI | Admitted (licensed) | $354,531 | 0.34% |
| 48 | Pennsylvania National Mutual Casualty Insurance Company | 14990 | PA | Admitted (licensed) | $274,453 | 0.27% |
| 49 | Platte River Insurance Company | 18619 | NE | Admitted (licensed) | $268,106 | 0.26% |
| 50 | Western National Mutual Insurance Company | 15377 | MN | Admitted (licensed) | $244,868 | 0.24% |
| 51 | U.S. Specialty Insurance Company | 29599 | TX | Admitted (licensed) | $244,557 | 0.24% |
| 52 | Westchester Fire Insurance Company | 10030 | PA | Admitted (licensed) | $233,484 | 0.23% |
| 53 | Developers Surety and Indemnity Company | 12718 | CA | Admitted (licensed) | $225,374 | 0.22% |
| 54 | Safeco Insurance Company of America | 24740 | NH | Admitted (licensed) | $220,086 | 0.21% |
| 55 | Old Republic Insurance Company | 24147 | PA | Admitted (licensed) | $163,778 | 0.16% |
| 56 | Universal Surety Company | 25933 | NE | Admitted (licensed) | $160,342 | 0.16% |
| 57 | American Contractors Indemnity Company | 10216 | CA | Admitted (licensed) | $156,071 | 0.15% |
| 58 | State Farm Fire and Casualty Company | 25143 | IL | Admitted (licensed) | $142,963 | 0.14% |
| 59 | Hartford Accident and Indemnity Company | 22357 | CT | Admitted (licensed) | $142,561 | 0.14% |
| 60 | Frankenmuth Insurance Company | 13986 | MI | Admitted (licensed) | $139,538 | 0.14% |
| 61 | Swiss Re Corporate Solutuions Premier Insurance Corporation | 32778 | MO | Admitted (licensed) | $137,169 | 0.13% |
| 62 | United Casualty and Surety Insurance Company | 36226 | NE | Admitted (licensed) | $135,693 | 0.13% |
| 63 | Westfield Insurance Company | 24112 | OH | Admitted (licensed) | $120,775 | 0.12% |
| 64 | NGM Insurance Company | 14788 | FL | Admitted (licensed) | $117,293 | 0.11% |
| 65 | Accelerant National Insurance Company | 10220 | AR | Admitted (licensed) | $116,313 | 0.11% |
| 66 | Sentry Insurance Company | 24988 | WI | Admitted (licensed) | $107,714 | 0.10% |
| 67 | IMT Insurance Company | 14257 | IA | Admitted (licensed) | $107,413 | 0.10% |
| 68 | Lexington National Insurance Corporation | 37940 | FL | Admitted (licensed) | $105,979 | 0.10% |
| 69 | Continental Insurance Company, (The) | 35289 | PA | Admitted (licensed) | $94,700 | 0.09% |
| 70 | Great Northern Insurance Company | 20303 | IN | Admitted (licensed) | $94,700 | 0.09% |
| 71 | Jet Insurance Company | 17858 | TX | Writes (premium reported) | $94,009 | 0.09% |
| 72 | SureTec Insurance Company | 10916 | TX | Admitted (licensed) | $91,842 | 0.09% |
| 73 | Allegheny Casualty Company | 13285 | NJ | Admitted (licensed) | $80,649 | 0.08% |
| 74 | Great American Alliance Insurance Company | 26832 | OH | Admitted (licensed) | $76,327 | 0.07% |
| 75 | Pennsylvania Insurance Company | 21962 | NM | Admitted (licensed) | $71,436 | 0.07% |
| 76 | Argonaut Insurance Company | 19801 | NE | Admitted (licensed) | $53,499 | 0.05% |
| 77 | Indemnity National Insurance Company | 18468 | MS | Admitted (licensed) | $50,439 | 0.05% |
| 78 | Farmington Casualty Company | 41483 | CT | Admitted (licensed) | $50,034 | 0.05% |
| 79 | American Bankers Insurance Company of Florida | 10111 | FL | Admitted (licensed) | $48,644 | 0.05% |
| 80 | Ohio Indemnity Company | 26565 | OH | Admitted (licensed) | $46,332 | 0.04% |
| 81 | Colonial Surety Company | 10758 | PA | Admitted (licensed) | $44,573 | 0.04% |
| 82 | Gray Insurance Company (The) | 36307 | LA | Admitted (licensed) | $42,670 | 0.04% |
| 83 | Bar Plan Mutual Insurance Company (The) | 29513 | MO | Admitted (licensed) | $35,505 | 0.03% |
| 84 | Erie Insurance Company | 26263 | PA | Admitted (licensed) | $35,252 | 0.03% |
| 85 | Everspan Insurance Company | 24961 | AZ | Admitted (licensed) | $34,180 | 0.03% |
| 86 | Pacific Indemnity Company | 20346 | DE | Admitted (licensed) | $34,070 | 0.03% |
| 87 | Federated Mutual Insurance Company | 13935 | MN | Admitted (licensed) | $31,136 | 0.03% |
| 88 | International Fidelity Insurance Company | 11592 | NJ | Admitted (licensed) | $23,086 | 0.02% |
| 89 | Berkshire Hathaway Specialty Insurance Company | 22276 | NE | Admitted (licensed) | $22,424 | 0.02% |
| 90 | Guarantee Company of North America USA (The) | 36650 | AR | Admitted (licensed) | $22,146 | 0.02% |
| 91 | Markel Insurance Company | 38970 | IL | Admitted (licensed) | $20,516 | 0.02% |
| 92 | Pekin Insurance Company | 24228 | IL | Admitted (licensed) | $16,379 | 0.02% |
| 93 | State National Insurance Company, Inc. | 12831 | TX | Admitted (licensed) | $14,355 | 0.01% |
| 94 | American Casualty Company of Reading, Pennsylvania | 20427 | PA | Admitted (licensed) | $11,885 | 0.01% |
| 95 | Minnesota Lawyers Mutual Insurance Company | 42234 | MN | Admitted (licensed) | $10,928 | 0.01% |
| 96 | Vigilant Insurance Company | 20397 | NY | Admitted (licensed) | $9,150 | 0.01% |
| 97 | National Fire Insurance Company of Hartford | 20478 | IL | Admitted (licensed) | $7,815 | 0.01% |
| 98 | Bankers Insurance Company | 33162 | FL | Admitted (licensed) | $6,825 | 0.01% |
| 99 | National Indemnity Company | 20087 | NE | Admitted (licensed) | $3,840 | 0.00% |
| 100 | American States Insurance Company | 19704 | IN | Admitted (licensed) | $3,700 | 0.00% |
| 101 | RepWest Insurance Company | 31089 | AZ | Admitted (licensed) | $3,136 | 0.00% |
| 102 | Sentry Select Insurance Company | 21180 | WI | Admitted (licensed) | $2,905 | 0.00% |
| 103 | Acstar Insurance Company | 22950 | IL | Admitted (licensed) | $1,875 | 0.00% |
| 104 | Star Insurance Company | 18023 | MI | Admitted (licensed) | $1,790 | 0.00% |
| 105 | Hartford Insurance Company of the Midwest | 37478 | IN | Admitted (licensed) | $1,400 | 0.00% |
| 106 | Contractors Bonding and Insurance Company | 37206 | IL | Admitted (licensed) | $1,248 | 0.00% |
| 107 | Utica Mutual Insurance Company | 25976 | NY | Admitted (licensed) | $750 | 0.00% |
| 108 | St. Paul Fire and Marine Insurance Company | 24767 | CT | Admitted (licensed) | $420 | 0.00% |
| 109 | West American Insurance Company | 44393 | IN | Admitted (licensed) | $400 | 0.00% |
| 110 | Standard Fire Insurance Company (The) | 19070 | CT | Admitted (licensed) | $383 | 0.00% |
| 111 | United States Fidelity and Guaranty Company | 25887 | CT | Admitted (licensed) | $260 | 0.00% |
| 112 | Protective Insurance Company | 12416 | IN | Admitted (licensed) | $250 | 0.00% |
| 113 | Aspen American Insurance Company | 43460 | TX | Admitted (licensed) | $185 | 0.00% |
| 114 | American Surety Company | 31380 | IN | Admitted (licensed) | $162 | 0.00% |
| 115 | UNIVERSAL FIRE \u0026 CASUALTY INSURANCE COMPANY | 32867 | IN | Admitted (licensed) | $136 | 0.00% |
| 116 | North River Insurance Company (The) | 21105 | NJ | Admitted (licensed) | $120 | 0.00% |
| 117 | American Southern Insurance Company | 10235 | KS | Admitted (licensed) | $100 | 0.00% |
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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