- Allied
- Avera Health Plans
- BCBS
- Buckeye Insurance Group
- Columbia Insurance Group
- Continental Western Group
- EMC
- Farmers Alliance Mutual Insurance
- Grinnell Mutual
- Nationwide Life
- Progressive
- RCIS
- State Auto
- Allstate
- Avera Health Plans
- BCBS
- Center Mutual Insurance Company
- Continental Western Group
- EMC
- Farmers Alliance Mutual Insurance
- Grinnell Mutual
- Nationwide Life
- Progressive
- Safeco
- State Auto