- Aetna
- Allstate
- Ameritas
- Auto-Owners
- Blue Cross Blue Shield
- Chubb
- Cincinnati Insurance Companies
- Delta Dental
- Farmers Insurance
- Foremost
- Hartford
- Health Alliance
- Humana
- Illinois Casualty Co.
- IMT Insurance
- Markel
- MetLife
- Pekin
- Principal
- Progressive
- Rockford Mutual
- Selective
- Synergy
- The Standard
- Travelers
- United Healthcare
- West Bend