- Accident Fund Insurance Company
- Acuity Insurance
- Allied
- Amerisafe
- AmTrust
- BITCO Insurance Companies
- Chubb
- Cincinnati Casualty Company
- CNA
- CWG
- Farmers Alliance Mutual Insurance
- FirstComp
- Grinnell Mutual
- Hartford
- LeMars
- Liberty Mutual
- Midwest Family Mutual
- Patriot
- Philadelphia
- Progressive
- QBE
- RAS
- Riverport
- RLI Corp.
- Safeco
- SFM
- Travelers
- United Fire Group
- USLI
- Zurich