HaulThe Largest Truck Insurance Companies
As of 2026-08-02, Great West Casualty Co. carries the most active FMCSA liability filings (38,460, 10.4% of 371,447); rolled up by corporate parent, Progressive leads the market at 12.5% across 12 filing entities.
Which insurers actually cover America’s trucking companies? Using the public FMCSA insurance register, this leaderboard ranks insurers by the number of active liability (BIPD) filings on record — a window into market share that single-carrier lookup tools can’t show. Great West Casualty Co. leads with 38,460 active filings.
The headline numbers
Across 371,447 active primary-liability filings on the public FMCSA register (dataset qh9u-swkp), the five largest insurers by filing count together account for 30.7% — a concentrated top tier above a long tail of regional and specialty carriers.
Top truck insurers by active liability filings
The ten insurers with the most active BIPD liability filings on the public FMCSA register. Bars show the number of active filings naming each insurer.
Show data table
| Rank | Insurer (as filed) | Active filings | Share |
|---|---|---|---|
| 1 | Great West Casualty Co. | 38,460 | 10.4% |
| 2 | United Financial Casualty Company | 26,046 | 7% |
| 3 | Geico Marine Insurance Company | 18,813 | 5.1% |
| 4 | Northland Insurance Company | 18,582 | 5% |
| 5 | Artisan & Truckers Casualty Company | 11,832 | 3.2% |
| 6 | Canal Insurance Co. | 8,167 | 2.2% |
| 7 | Progressive County Mutual | 7,182 | 1.9% |
| 8 | Progressive Casualty Insurance Company | 7,110 | 1.9% |
| 9 | Progressive Northern Insurance Company | 6,805 | 1.8% |
| 10 | Progressive Southeastern Insurance Company | 6,650 | 1.8% |
| 11 | Acuity, a Mutual Insurance Company | 5,799 | 1.6% |
| 12 | Sentry Select Insurance Company | 5,388 | 1.5% |
| 13 | Geico County Mutual Insurance Co. | 5,170 | 1.4% |
| 14 | Progressive Preferred Insurance Co. | 4,287 | 1.2% |
| 15 | Progressive Mountain Insurance Company of Ohi | 3,956 | 1.1% |
| 16 | Old Republic Insurance Company | 3,924 | 1.1% |
| 17 | Auto Owners Insurance Company | 3,749 | 1% |
| 18 | Accredited Specialty Insurance Company | 3,479 | 0.9% |
| 19 | Geico General Insurance Company | 3,373 | 0.9% |
| 20 | Atlantic Specialty Insurance Company | 3,222 | 0.9% |
| 21 | Db Insurance Co., Ltd. (u.s.branch) | 3,150 | 0.8% |
| 22 | National Interstate Insurance Company | 3,147 | 0.8% |
| 23 | Highlander Specialty Insurance Company | 2,959 | 0.8% |
| 24 | Progressive Express Insurance Company | 2,824 | 0.8% |
| 25 | Occidental Fire and Casualty Co. of N.C. | 2,807 | 0.8% |
Ranked by corporate parent group
The entity ranking above lists insurers exactly as named on each filing. Rolling those filings up by corporate parent reveals a more concentrated market: Progressive leads with 12.5% of active liability filings across 12 filing entities — ahead of its position in the entity list, where its filings are split across several named underwriters.
Show data table
| Rank | Parent group | Filing entities | Active filings | Share |
|---|---|---|---|---|
| 1 | Progressive | 12 | 46,395 | 12.5% |
| 2 | Great West Casualty Co. | 1 | 38,460 | 10.4% |
| 3 | Geico | 3 | 27,356 | 7.4% |
| 4 | United Financial Casualty Company | 1 | 26,046 | 7% |
| 5 | Northland Insurance Company | 1 | 18,582 | 5% |
| 6 | Artisan & Truckers Casualty Company | 1 | 11,832 | 3.2% |
| 7 | Canal Insurance Co. | 1 | 8,167 | 2.2% |
| 8 | Acuity, a Mutual Insurance Company | 1 | 5,799 | 1.6% |
| 9 | Sentry Select Insurance Company | 1 | 5,388 | 1.5% |
| 10 | Old Republic Insurance Company | 1 | 3,924 | 1.1% |
| 11 | Auto Owners Insurance Company | 1 | 3,749 | 1% |
| 12 | Accredited Specialty Insurance Company | 1 | 3,479 | 0.9% |
| 13 | Atlantic Specialty Insurance Company | 1 | 3,222 | 0.9% |
| 14 | Db Insurance Co., Ltd. (u.s.branch) | 1 | 3,150 | 0.8% |
| 15 | National Interstate Insurance Company | 1 | 3,147 | 0.8% |
| 16 | Highlander Specialty Insurance Company | 1 | 2,959 | 0.8% |
| 17 | Occidental Fire and Casualty Co. of N.C. | 1 | 2,807 | 0.8% |
| 18 | Erie Insurance Exchange | 1 | 2,729 | 0.7% |
| 19 | Berkley Casualty Company | 1 | 2,607 | 0.7% |
| 20 | Southlake Specialty Insurance Company | 1 | 2,599 | 0.7% |
| 21 | Insurance Corporation of British Columbia | 1 | 2,573 | 0.7% |
| 22 | Zurich American Insurance Company | 1 | 2,561 | 0.7% |
| 23 | Universal Casualty Risk Retention Group, Inc | 1 | 2,488 | 0.7% |
| 24 | Agency Insurance Company of Maryland, Inc | 1 | 2,479 | 0.7% |
| 25 | Ms Transverse Specialty Insurance Company | 1 | 2,416 | 0.7% |
Why you can’t find this elsewhere
SAFER and other lookup tools show one carrier’s insurer at a time. Because HaulReport aggregates the entire public insurance register, we can answer the market-level question — which insurers cover the most trucking companies? A few important caveats keep this honest: filing share is not the same as premium market share; some carriers (especially cross-border ones) file coverage differently or not at all; and corporate families underwrite through multiple named entities, so a parent group’s true footprint is larger than any one row. For the flip side — carriers with no liability amount on file — see carrier insurance statistics and carriers without insurance on file by state.
Frequently asked questions
- What is the largest truck insurance company in the United States?
- By active primary-liability (BIPD) filings on the public FMCSA register, Great West Casualty Co. carries the most — 38,460 filings, about 10.4% of the 371,447 active liability filings on record. This measures filing share on the public register, not premium volume or financial-strength ratings, and large insurers also underwrite through several entities, so the true market is more concentrated than any single name shows.
- How is this truck-insurer ranking calculated?
- HaulReport counts active primary-liability (BIPD) insurance filings on the public FMCSA insurance roster (dataset qh9u-swkp) and groups them by the insurer named on each filing. "Active" means the filing carries no cancellation date. Each filing reflects a carrier's liability coverage placed by that insurer, so the count is a proxy for how many trucking companies an insurer covers — not dollars of premium.
- Does this rank insurers by quality or price?
- No. This is a neutral count of filings on the public record. It is not a recommendation, a quality or financial-strength rating, or a measure of price. Insurers appear exactly as named on their FMCSA filings; HaulReport is not affiliated with any of them.
- How current is this data?
- It is a point-in-time snapshot of the public FMCSA insurance register. The FMCSA registration data froze around the end of 2025 during the agency's MOTUS system migration, so these figures map the market as of that record rather than a live daily feed. They are aggregated from public records compiled 2026-08-02.