MountainOne
Financial ServicesMassachusetts, United States51-200 Employees
MountainOne is a mutual holding company that delivers a suite of financial services through its banking and insurance affiliates. It maintains full-service offices in the Berkshires (Pittsfield, North Adams, Williamstown) and on Boston's South Shore (Quincy, Rockland, Scituate), serving individuals, businesses, and community institutions. The banking arm provides personal and business banking along with electronic services, while MountainOne Insurance offers personal and business insurance, bonding services, and group benefits solutions. Headquartered in North Adams, Massachusetts, MountainOne traces its history to 1848. A 2026 development saw MountainOne Insurance Agency open an office in Great Barrington, expanding its presence in Southern Berkshire County; MountainOne Bank is a member of the FDIC and DIF and is an Equal Housing Lender.