Acquisition, holding and management of participations as well as engineering companies for consulting, planning and construction management in projects related to environmental technology, water supply, wastewater disposal, waste and landfill technology, general hydraulic engineering, general water management and water protection, as well as in projects related to transportation technology and transportation construction, energy technology and automation, land development, environmental planning, landscape planning, spatial and construction planning; can participate in other companies and buy, sell and broker securities.