Mark V. Williamson Co., Inc.
- Accident Fund Insurance Company
- AmTrust
- Auto-Owners
- Chubb
- Cincinnati Insurance Companies
- CNA
- Foremost
- Hanover
- Progressive
- Safeco
- Travelers
- Union Std.
- Zurich
- Mark V. Williamson, CIC, CEO/Chmn.
- Mark S. Williamson, CIC, CPCU, President
- William R. Fletcher, CIC, Exec. V.P.
- Kim Ellis, V.P.