The Witherington Insurance Group, Inc.
- Allstate
- American Interstate
- American Medical Security
- Auto-Owners
- BITCO Insurance Companies
- CNA
- Companion Group
- Employers Mut.
- Encompass
- Foremost
- Great American
- Hartford
- Infinity
- Meadowbrook
- North Pointe
- Omni
- Pennsylvania Lumbermens Mutual
- Principal Life
- Progressive
- Protective Life
- Safeco
- Travelers
- United Healthcare
- John H. Witherington, President