Execution of assembly orders in the construction sector, including new buildings, conversions or renovations, particularly in the sanitary and heating sector; further services in the new building and renovation sector; purchase, sale, creation, brokerage, rental and management of real estate as well as provision of related services; import and export of goods of all kinds; granting and taking up of loans; provision of guarantees and other securities; acquisition, management and sale of intellectual property rights, licenses and securities; participations.