S IMMO AG engages in the acquisition, letting, and sale of properties. The company also develops and constructs offices, hotels, real estate, and commercial and residential properties in cooperation with project development partners. It operates through the following segments: Austria, Germany, and CEE. The Austria segment manages the group's Austrian subsidiaries. The Germany segment includes the German subsidiaries and the Austrian subsidiaries that holds properties in Germany. The CEE segment comprises of subsidiaries in Slovakia, the Czech Republic, Hungary, Bulgaria, Croatia, and Romania. The company was founded by Ernst Vejdovszky on September 24, 1986 and is headquartered in Vienna, Austria.