- American Collectors Insurance
- American Modern Insurance Group
- Anthem Blue Cross Blue Shield
- Arch Insurance
- Assurant
- Auto-Owners
- Genworth Financial
- Humana
- Medical Mutual
- MetLife
- National Lloyds
- Ohio FAIR Plan
- Ohio Mutual
- Progressive
- RLI Corp.
- State Auto
- Symetra
- United Healthcare
- West Coast Life