AIG
American Compensation Insurance (RTW)
Chubb Group of Insurance Companies
Clarendon National Insurance Company
CNA
Farmers Insurance
Federated Mutual Insurance Company
Fireman's Fund
Fremont Compensation
Hartford
Hawkeye Security Insurance Company
ICW Group
Kemper Insurance Company
Kentucky Employers Mutual Insurance

Liberty Mutual Insurance Group
Liberty Northwest
One Beacon Insurance
Pinnacol Assurance
Royal & Sun Alliance (EBI Companies)
Sierra Insurance Group (California Indemnity)
Society Insurance Company
State Compensation Insurance Fund (SCIF) (CA)
State Fund Mutual Companies (WI)
St. Paul Travelers
TIG
Travelers Property & Casualty
Wausau Insurance Group
West Bend Mutual Insurance Company
Zurich