Marsh & McLennan Agency Acquires Heritage Insurance Service, Inc.

Marsh McLennan Agency Acquires HMS Insurance Associates

January 4, 2023

Insurance

Marsh McLennan Agency (MMA), a subsidiary of Marsh, has acquired Hunt Valley, Maryland-based HMS Insurance Associates, Inc.; terms were not disclosed. Founded in 1943, HMS — with more than 120 employees — provides property/casualty, surety, group captive and employee benefits services and will continue operating from its Hunt Valley office as part of MMA.

Marsh McLennan Agency Acquires Clark Insurance (including Haberman Insurance)

June 2, 2023

Insurance

Marsh McLennan Agency (MMA), a subsidiary of Marsh, has acquired Clark Insurance, a full-service independent insurance agency headquartered in Portland, Maine; the transaction also includes Haberman Insurance, which Clark acquired in 2021. The deal brings all 135 Clark employees (plus Haberman staff) into MMA and expands MMA's presence across New England with Clark's offices in Maine, New Hampshire and Massachusetts.

Marsh McLennan Agency Acquires Arthur Hall Insurance

April 2, 2025

Insurance

Marsh McLennan Agency (MMA), a business of Marsh, has acquired Arthur Hall Insurance, a full-service insurance agency based in West Chester, Pennsylvania. The acquisition will bring Arthur Hall's commercial and personal lines expertise into MMA's network and establish a new MMA presence in Delaware; terms were not disclosed.

Marsh & McLennan Agency (MMA) Acquires Assurance Holdings, Inc.

April 1, 2020

Insurance

Marsh & McLennan Agency LLC (MMA), the US middle-market agency subsidiary of Marsh, has acquired Schaumburg, Illinois-based Assurance Holdings, Inc. Assurance's approximately 525 colleagues will join MMA and Assurance will serve as MMA's Midwest regional headquarters; terms were not disclosed.

Marsh McLennan Agency Acquires Hayden Wood Insurance Agency

November 3, 2025

Insurance

Marsh McLennan Agency (MMA) has acquired Hayden Wood Insurance Agency Inc., an independent personal-lines agency based in Southborough, Massachusetts. Terms were not disclosed; all employees, including President and owner Morgan Duffy, will join MMA and continue to operate from the existing Southborough office. The acquisition expands MMA's private client capabilities with Hayden Wood's specialty in collector auto and motorsports insurance.

Marsh McLennan Agency Acquires InSource Insurance Group LLC

December 1, 2021

Insurance

Marsh McLennan Agency (MMA) acquired InSource Insurance Group LLC, an independent Texas insurance agency with offices in Midland and Odessa. The acquisition (terms undisclosed) brings InSource's ~45 employees into MMA to expand its Southwest presence and strengthen MMA's energy industry vertical.