- Accident Fund Insurance Company
- AgriSompo
- Auto-Owners
- Berkshire Hathaway Homestate
- Buckeye Insurance Group
- Burns & Wilcox
- Chris-Leef General Agency
- Chubb
- CNA Surety
- Dairyland
- EMC
- Farmers Alliance Mutual Insurance
- Foremost
- Great American
- Hagerty
- Hartford
- J.C. Taylor
- Kansas Mut.
- Liberty Mutual
- Markel
- Marysville Mutual
- Med James
- Nationwide
- NCCI
- North Star Mutual Insurance Company
- Pennsylvania Lumbermens Mutual
- Progressive
- RLI Corp.
- Safeco
- State Auto
- Traders
- Travelers
- Upland Mut.
- West Bend