JM AB engages in the provision of real estate and property development activities. It operates through the following business segments: JM Residential Stockholm, JM Residential Sweden, JM International, JM Property Development, and JM Construction. 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 development of residential projects in growth areas in Sweden, excluding Greater Stockholm. The JM International segment develops residential properties in Norway, Denmark, Finland and Belgium. The JM Property Development segment develops rental housing, residential care facilities 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.