- Aetna
- AmTrust
- Chubb
- Cigna
- CNA Surety
- Delta Dental
- Electric
- Foremost
- Guard Ins.
- Guardian
- Guardian Life
- Hartford
- Horizon BC/BS
- Mass Mut. Life
- Norfolk & Dedham
- Pennsylvania Lumbermens Mutual
- PMA Group
- Progressive
- RLI Corp. Surety Bonds
- Tower Group
- Travelers
- United Healthcare