TAG Immobilien AG is a German property company specializing in the acquisition, development, and management of residential real estate across the country. Beyond housing, the firm also leases commercial properties and operates serviced apartments. As of December 31, 2021, its extensive portfolio encompassed approximately 87,600 residential units. Founded in 1882, the company was initially known as TAG Tegernsee Immobilien-und Beteiligungs-Aktiengesellschaft, before officially rebranding as TAG Immobilien AG in September 2008. Its corporate headquarters are situated in Hamburg, Germany.