- American Modern Insurance Group
- Arbella Insurance Group
- Berkshire Hathaway GUARD
- Chubb
- Concord Group Insurance
- Conexco
- Encompass
- Fireman's Fund
- Foremost
- Great American
- Hanover
- Harleysville
- Hartford
- International Marine Underwriters
- Litchfield Mut.
- Main St. America
- Merchants Insurance Group
- Metropolitan
- Ohio Casualty
- OneBeacon
- Peerless
- Pennsylvania Lumbermens Mutual
- Pilgrim
- Preferred Mutual
- Providence Mutual
- Safeco
- Tower Group
- Travelers
- Zurich