- Accident Fund Insurance Company
- Acuity Insurance
- AIG
- Amerisure
- Arlington/Roe
- BCBS of MI
- Central Mutual Insurance Company
- Chubb
- CIBA Insurance Services
- Cincinnati
- Citizens
- CNA
- Continental Western Group
- Country Mut.
- Delta Dental
- Eastern Alliance
- EMC
- Encompass
- Evolve
- Fairmont Specialty
- FCCI
- Fireman's Fund
- Foremost
- GNY
- Grange
- Great West Casualty
- Guardian
- Hanover
- Harleysville
- Hartford
- Hartford Steam Boiler
- Integon
- Liberty Mutual
- MCIM
- Michigan Basic
- Michigan Millers Mutual Insurance Company
- MiddleOak
- Mitsui Sumitomo
- National Flood Insurance Program (NFIP) / FEMA
- Nationwide Agribusiness
- Nautilus
- Philadelphia
- Progressive
- QBE
- Safeco
- Selective
- Starr
- State Auto
- Titan
- Travelers
- Unum
- Westfield Insurance
- Zurich