- Accident Fund Insurance Company
- AIG
- American Modern Insurance Group
- Amerisafe
- Anthem Blue Cross Blue Shield
- Atlantic Specialty
- Berkshire Hathaway
- Chubb
- ClearPath
- Employers
- Everett Cash Mutual Insurance Co.
- Foremost
- Great American
- Hartford
- Humana
- KEMI
- Keystone
- KY AGC/SIF
- Liberty Mutual
- Ohio Casualty
- Philadelphia
- Progressive
- RLI Corp.
- Rockwood Cas.
- Safeco
- Secura
- Selective
- State Auto
- Travelers
- US Assure
- West Bend
- Zurich