- AAA
- Accident Fund Insurance Company
- Acuity Insurance
- Aflac
- AIG
- BCBS
- Cherokee
- Chubb
- CNA
- FCCI
- Fireman's Fund
- Frankenmuth
- Fremont
- Hartford
- Hastings Mut.
- Humana
- Indiana
- Michigan Millers Mutual Insurance Company
- Priority Health
- Travelers
- Westfield Insurance
- Zurich