- Accident Fund Insurance Company
- American Modern Insurance Group
- Amerisafe
- Applied Underwriters
- Assurant
- Berkshire Hathaway GUARD
- Builders
- Central
- Chubb
- Cincinnati
- CNA
- CNA Surety
- Donegal
- Encompass
- FCCI
- Foremost
- Great American
- Hartford
- Humana
- Liberty Mutual
- Mercury
- National General
- Nationwide
- Philadelphia
- Progressive
- Safeco
- Selective
- Texas Mutual
- Travelers
- UniCare
- United Healthcare
- Unum
- Zenith
- Zurich