JM AB engages in the business of real estate and property development activities. It operates through the following segments: JM Residential Stockholm, JM Residential Sweden, JM International, JM Property Development, JM Construction, and JM Other. The JM Residential Stockholm segment deals with the development of residential projects in Greater Stockholm, which activities include acquisitions of development properties, planning, pre-construction, production, and sales of residential units. The JM Residential Sweden segment involves the development of residential projects in growth areas in Sweden, excluding Greater Stockholm. The JM International segment develops residential properties in Norway and Finland. The JM Property Development segment relates to the development of rental units, residential care units and commercial properties in Greater Stockholm. The JM Construction segment carries out construction work for external and internal customers in the Greater Stockholm area. The company was founded by John Mattson in 1945 and is headquartered in Stockholm, Sweden.