Colonia Real Estate AG operates as an asset management arm of TAG Immobilien AG. Colonia Real Estate AG and its subsidiaries engage in the acquisition, sale, and management of real estate and shareholdings in Germany. It operates hotel, commercial, and residential properties, as well as asset and funds management. Colonia Real Estate's properties include Kassel, Braunschweig, Eisenach, Cologne, Friesland, Bremen, Hamburg, Berlin portfolio, and East portfolio. The company was founded as Küppersbusch AG in 1875 and changed its name to Colonia Real Estate AG in 2004. Colonia Real Estate is based in Cologne, Germany.