Since 1984, active members who have been added are: Mandeville Agency, Columbus; Erickson-Baldwin Insurance, Havre; Beartooth Insurance, Red Lodge; Seitz Insurance, Sidney; Insurance Store, Baker; Thompson/Collins Agency, Plentywood; House of Insurance, Hamilton; House of Insurance, Thompson Falls; Bishop Insurance Service, Polson; Bishop Insurance Service, Ronan; and Hellman Insurance Service, Terry. The partners believe that the congeniality of its members and the similarity among member agencies has been one of the cornerstones of the organization's success. MIM's representation covers Hamilton, Thompson Falls and surrounding areas in western Montana; and the eastern one-half of Montana on the north-south line extending from Havre through Lewistown and Columbus, Montana.

Today the following insurance companies are either currently doing business through MIM, or dealing directly with its members, but have negotiated and combined MIM marketing contracts: Austin Mutual, CBIC, Employers Mutual Companies, Farmers Alliance, Fireman's Fund, Foremost, Hartford Insurance Company, Kemper Auto & Home, Liberty Northwest, Montana State Fund, QBE, Safeco, Travelers Insurance Company,and Zurich Small Business.