JM AB engages in the development of housing and residential areas in Nordic region. 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 develops residential projects in Greater Stockholm, which includes acquisitions of properties, planning, pre-construction, production, and sales of residential units. The JM Residential Sweden segment serves the growth areas in Sweden, excluding Greater Stockholm. The JM International segment covers Norway and Finland. The JM Property Development segment focuses on rental units, residential care units, and commercial properties in Greater Stockholm. The JM Construction segment refers to 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.