- Aegis
- AIG
- Allied
- Berkley
- BITCO Insurance Companies
- CCAP
- Chubb
- CNA
- Donegal
- Eastern Alliance
- ECM
- Employers Mut.
- Encompass
- Fair Plan
- Farmers Mutual Insurance
- Farmers New Century
- Foremost
- Hartford
- Highmark BC/BS
- Interstate
- J.C. Taylor
- Kemper
- Lebanon Mut.
- Lebanon Valley
- Nationwide
- Ohio Casualty
- Penn Natl.
- Philadelphia
- Progressive
- Rockwood
- Travelers
- Tuscarora Wayne
- VFIS
- Zenith