Accident Fund Insurance Company of America
American International Group
AmTrust Financial Services
Cincinnati Financial Corporation
Erie Insurance Group
GUARD Insurance Group
Hanover Insurance
The Hartford
Liberty Mutual
Merchants Insurance Group
Missouri Employers Mutual
Nationwide Mutual Insurance Company
New York State Insurance Fund
The Norfolk & Dedham Group
Penn National Insurance
Puerto Rico State Insurance Fund
Sentry Insurance
Society Insurance
State Farm Insurance
State Compensation Insurance Fund
United Heartland
Zenith Insurance Group