- Accident Fund Insurance Company
- Allstate
- American Modern Insurance Group
- Berkley One
- Berkshire Hathaway GUARD
- Bremen Farmers Mutual Insurance Company
- Bristol West
- Buckeye Insurance Group
- Chubb
- Clear Springs
- Condon Skelly
- EMC
- Farmers Alliance Mutual Insurance
- Foremost
- Hartford
- Markel
- Marysville Mutual
- Nationwide
- North Star Mutual Insurance Company
- Philadelphia
- Progressive
- Rain and Hail
- RLI Corp.
- Safeco
- Selective
- Travelers