- Aetna
- AmeriHealth
- Andover Companies
- Chubb
- CNA
- Foremost
- Horizon BC/BS
- Liberty Mutual
- Merchants Insurance Group
- Mercury
- Nationwide
- Ohio Casualty
- Oscar
- Personal Umbrella
- PIE
- Plymouth Rock Assurance
- Progressive
- Safeco
- The Philadelphia Contributionship
- Travelers
- United Healthcare
- Charles R. Hahn, AAI, Pres.
- Gordon M. Hahn