The Andover Companies has completed its reorganization into a mutual holding company structure, effective January 1, 2026.

The plan of reorganization was recently approved by the Massachusetts Division of Insurance and the policyholders of Merrimack Mutual Fire Insurance Co. and Cambridge Mutual Fire Insurance Co.

Both mutuals are now wholly owned subsidiaries of The Andover Companies, Inc., headquartered in Andover, Mass. Bay State Inc. is also part of the group.

Massachusetts Approves Reorganizations, Mergers for Andover Companies

Under the reorganization, Merrimack Mutual was converted into a stock insurance company and re-named Merrimack Insurance Co. and Cambridge Mutual was converted into a stock insurance company and re-named Cambridge Insurance Co.

Members of the group offer personal lines products including homeowners, condo and renters insurance and business insurance products that they distribute through independent agents.

The company says the new structure will “enhance operational efficiency, support long-term competitive standing, and unlock strategic opportunities in a continually evolving marketplace.”

“By adopting a mutual holding company structure, we are preserving the mutual roots that have defined our organization for nearly 200 years while creating the flexibility required to continue meeting the needs of our policyholders, agents, and employees for generations to come,” stated Chuck DiGrande, president and CEO.