Webber & Grinnell Insurance, an Alera Group Co.
- A.I.M. Mutual Insurance Companies
- Acadia
- Andover Companies
- Arbella Insurance Group
- Berkshire Hathaway GUARD
- Bunker Hill Insurance
- Chubb
- CNA
- EMC
- Hanover
- Hartford
- Liberty Mutual
- Main St. America
- MAPFRE
- Merchants Insurance Group
- MPIUA
- National Flood Insurance Program (NFIP) / FEMA
- Nationwide
- Philadelphia
- Plymouth Rock Assurance
- Preferred Mutual
- QBE
- Safeco
- Safety
- Selective
- State Auto
- Travelers
- Union Mutual
- Utica National Insurance Group
- Vermont Mutual Insurance Group
- Bill Grinnell, Managing Partner