Vestas Wind Systems A/S engages in the development, manufacture, sale, and maintenance of wind power plants. It operates through the Power Solutions and Service segments. The Power Solutions segment contains sale of onshore and offshore wind power plants, wind turbines, and development sites. The Service segment offers service contracts, spare parts, and related activities. The company was founded by Smith Hansen and Peder Hansen in 1945 and is headquartered in Aarhus, Denmark.