- Aetna
- American Strategic Insurance
- Amerisafe
- AmTrust
- Chubb
- Foremost
- Grange
- Guard
- Hartford
- Independence Blue Cross
- Infinity
- Liberty Mutual
- MetLife
- Nationwide
- Penn Natl.
- Philadelphia
- Progressive
- Safeco
- Stillwater Ins. Group
- The Philadelphia Contributionship
- Travelers
- Utica National Insurance Group