Castellum Aktiebolag is one of the largest listed real estate companies in Sweden. The value of the properties amounts to SEK 89.2 billion and consists mainly of premises for offices, warehouses / logistics and community properties with a lettable area of 4.2 million sq.m. Castellum operates through a decentralized organization with a strong local presence in about 20 cities in Sweden as well as in Copenhagen and Helsinki.
Wikipedia