- Accident Fund Insurance Company
- AmTrust
- Andover Companies
- Auto-Owners
- Badger Mutual Insurance Company
- Central Insurance Companies
- Cincinnati Casualty Company
- CNA
- Donegal
- EMC
- Encompass
- Grange
- Great American
- Great West
- Hanover
- Hartford
- Illinois Cas.
- Liberty Mutual
- Markel
- Nationwide
- Pekin
- Philadelphia
- Progressive
- Safeco