- American Modern Insurance Group
- Berkshire Hathaway GUARD
- Chubb
- CNA
- Cumberland Mutual
- Employers
- Foremost
- Franklin Mut.
- GNY
- Hanover
- Hartford
- Liberty Mutual
- Nationwide
- Philadelphia
- Plymouth Rock Assurance
- Selective
- The Philadelphia Contributionship
- Travelers
- United Fire Group