- Accident Fund Insurance Company
- Acuity Insurance
- Affinity Mutual Insurance Company
- AmComp
- Amerisure
- Auto-Owners
- BITCO Insurance Companies
- Central
- Chubb
- Chubb
- Cincinnati Insurance Companies
- Citizens
- CNA
- Crum & Forster
- Drive Ins.
- FCCI
- Hartford
- Indiana
- Middlesex Mutual
- Pennsylvania Lumbermens Mutual
- Progressive
- Safeco
- Sentry
- State Auto
- Tokio Fire & Marine
- Travelers
- United Heartland
- Wausau
- Zurich