The execution of above and underground construction work, civil engineering and building construction, the planning and design of buildings, both as a client and as a general contractor. The purchase, sale, rental, exchange, brokerage and management of real estate in Switzerland and abroad. In particular, the construction and realization of real estate complexes consisting of luxury apartments, hotels with design/luxury infrastructure, wellness centers and parking garages. Participation in similar Swiss and foreign companies, financial, industrial, commercial and real estate companies, in the form of financing, investments, loans, guarantees, sureties, mortgages and, in general, personal and real guarantees. The acquisition, sale and long-term administration of participations in other companies (Holding).