- Advantage Specialty
- American European
- American Property Insurance
- AmTrust
- Andover Companies
- Applied Underwriters
- Berkshire Hathaway GUARD
- Chubb
- CNA
- Cumberland Insurance Group
- Encompass
- Farmers of Salem
- Foremost
- Franklin Mut.
- Hanover
- Harford Mut.
- Harleysville
- Hartford
- IFA
- Ins. Co. of the West
- Liberty Mutual
- Magna Carta
- MAPFRE
- Merchants Insurance Group
- Mercury
- MetLife
- NJ Skylands
- Norfolk & Dedham
- Ohio Casualty
- One Beacon
- Peerless
- Penn Natl.
- Philadelphia
- Plymouth Rock Assurance
- Preferred Mutual
- Progressive
- Safeco
- Selective
- The Philadelphia Contributionship
- Travelers
- USLI
- Utica First
- Utica National Insurance Group