Install
Captives insurers
- Global and national commercial carriers 15
- Regional carriers 20
- Personal-lines carriers that also insure businesses 9
- Specialty and E&S insurers 31
- Workers' comp specialists and state funds 7
- Medical and professional liability specialists 3
- Niche and affinity insurers 9
- Small business specialists 12
- Cyber specialists 3
- Program carriers and fronting insurers 6
- Reinsurer-owned commercial insurers 5
| # | Insurer | Type | Commercial premiums (2025) | AM Best |
|---|---|---|---|---|
| 49 | Swiss Re Corporate SolutionsSwiss Re's commercial insurance arm: high-capacity property, casualty, professional, surety, stop loss and captive fronting for large U.S. companies. | Reinsurer-owned commercial insurers | $1.89 billion | A+ (Superior) |
| 85 | Sutton NationalA-rated program carrier that issues admitted and surplus lines policies for program administrators and reinsurers; you reach it only through a program. | Program carriers and fronting insurers | $877.4 million | A- (Excellent), stable outlook |
| 86 | Obsidian InsuranceGenstar-backed hybrid fronting carrier that issues policies for MGA and program administrator programs; Protective Life agreed to buy it in April 2026. | Program carriers and fronting insurers | $866.6 million | A- (Excellent), under review with positive implications |
| 88 | AccreditedOnex-owned program manager whose A- rated insurers issue admitted and surplus lines policies for MGAs in the U.S., UK and Europe; commercial auto leads. | Program carriers and fronting insurers | $781.5 million | A- (Excellent), stable outlook; Financial Size Category IX |
Ranked by 2025 U.S. commercial lines direct premiums written: NAIC 2025 market share data for 17 commercial lines (states and U.S. territories), summed by insurance group. A group's premium in a line where it is outside NAIC's top 125 is not counted. Seven groups are left out because a business cannot buy from them or their premium in these lines is mostly consumer coverage: USAA, CSAA, the Ohio Bureau of Workers' Compensation, Florida's Citizens, the Texas FAIR Plan and windstorm pool, Assurant and Generali. Brands without a rank are well-known companies inside these groups or outside the top 100.