Acciona, S.A. engages in the development and management of infrastructure, renewable energy, water, and services in Spain and internationally. The company develops, constructs, operates, and maintains wind, solar photovoltaic, solar thermal, hydro, and biomass plants; operates a 9,000 megawatt project; develops energy projects with an installed capacity of approximately 2,000 megawatts for third parties; operates substations and transmission networks, as well as is involved in installation activities; markets electricity of renewable origin; and develops wind turbine-generators. It also engages in the construction, engineering, performance, maintenance, and management of public work concessions primarily in the field of transport and social infrastructures, including bridges, roads, and special structures, including bridges, roads, and special structures; railroads and tunnels; and hospital and university projects, irrigation, and ports and hydro projects, as well as projects in engineering, concessions, and other businesses. In addition, the company designs, constructs, and operates drinking water treatment plants, desalination facilities, wastewater treatment plants, and tertiary treatment plants for water reuse; and offers end-to-end service management services comprising water treatment, delivering it to inhabitants, treating urban and industrial wastewater, and billing end-users, as well as undertakes industrial projects. Further, it provides facility, airport handling, waste collection and management, logistics, technical, energy, forwarding, rail, urban and environmental maintenance, healthcare, smart city, and event and museum services. Additionally, the company engages in the financial, fund management, real estate, stock broking, winery, freight and passenger's transport by sea, housing development, and other businesses. Acciona, S.A. is headquartered in Alcobendas, Spain.