[M137]

MSO (Mutual Services Office)

Originally begun as an association of mutual insurers, it is now a corporation which provides a variety of services including rating, statistical, actuarial, and policy form services for multiple lines of property and casualty business. The association operates in seven Eastern and Midwestern states. MSO also assists member companies with product development and customization. It was established in 1944. Headquarters: Glen Rock, NJ.