- Aetna
- AmTrust
- Anthem BC
- CBIA Health Connection
- Central Insurance
- Chubb
- Cigna
- CNA
- ConnectiCare
- EDT
- Encompass
- FirstComp
- Foremost
- Guardian
- Hanover
- Hartford
- Hingham Mut.
- Kemper
- Lincoln Financial Group
- Main St. America
- MetLife
- MiddleOak
- NLC
- OneBeacon
- Oxford Health Plans
- Peerless
- Philadelphia
- Principal Financial Group
- QBE
- Safeco
- Selective
- Sun Life Financial
- The Standard
- Travelers
- UNUM
- Vermont Mutual Insurance Group
- Zurich