S IMMO AG is a real estate investment company. It manages property investments by developing, buying, letting, operating, renovating, and selling properties in Austria, Germany, Czechia, Hungary, Slovakia, Bulgaria, Romania, and Croatia. The firm's activities include property project development, the operation of hotels and shopping centers, and also revitalization and renovation of standing properties and asset management. Its property portfolio consists of offices, shopping centers, and hotels. The company derives a majority of its revenues from rental income.