Walter Bau AG and its subsidiaries provide construction-related services, including turnkey construction and civil engineering, international construction, and transportation infrastructure primarily in Germany. The company engages in planning, financing, building, renovating, and operating office and administrative buildings, logistics centers, factory buildings, exhibition centers, sports arenas, swimming baths, and historical buildings, as well as mainline railway stations, shipyards, water and harbour installations, airports, tunnels, bridges, and wind-energy farms, concrete and asphalt roads, and high-speed rail sections. It also offers planning, financing, project development, participation in BOT models, and facility management services. The company was created in 1983 pursuant to the merger of Thosti AG and Boswau+Knauer AG under the name Walter Thosti Boswau-AG. Later, it changed its name to Walter Bau-AG in 1991. Walter Bau is based in Augsburg, Germany.