- Aetna
- Anthem Blue Cross Blue Shield
- Celina Insurance Group
- Central Insurance Companies
- Cincinnati Insurance Companies
- Columbus Life
- Donegal
- EMC
- Encova
- Erie Insurance
- Foremost
- Grange
- Guardian
- Hagerty
- Hastings Mut.
- MassMutual
- Medical Mutual
- Pekin
- Progressive
- Safeco
- United Healthcare
- United HealthOne
- Wyandot Mut