TAG Immobilien AG engages in the acquisition, development, and management of residential real estate. It operates through the Rental and Services segments. The Rental segment manages residential portfolio in the following regions: Berlin, Chemnitz, Dresden, Erfurt, Gera, Hamburg, Leipzig, Rhine-Ruhr, Rostock, and Salzgitter. The Services segment includes business activities attributable to the internal service companies. The company was founded in 1882 and is headquartered in Hamburg, Germany.