Ellaktor S.A., through its subsidiaries, engages in the construction and quarrying, wind energy, concession, environment, and real estate development businesses in Greece, other European countries, Gulf countries, the Americas, and Australia. The company operates through five segments: Construction, Concessions, Renewable Energy Sources (RES), Environment, and Real estate Development. It constructs bridges, motorways, metro projects, biological treatment plants, natural gas pipelines, refineries, shopping centers, casinos, tourist and hotel units, cultural centers, hospitals, airports, Olympic and athletic complexes, railway projects, tunnels, dams, port projects, energy production stations, electromechanical projects, etc.; and logistics, office, residential, industrial, and educational buildings. The company is also involved in the waste management and energy production, which include design, construction, and operation of waste treatment plant, as well as offers alternative fuel production and biomass exploitation projects. In addition, it develops, constructs, and operates wind farms; provides real estate development and services, which consists of retail parks, entertainment centers, residential complexes, exhibition centers, and offices and mixed use buildings, as well as offers consultancy and services to third parties. The company was formerly known as ELLINIKI TECHNODOMIKI TEB SA and changed its name to Ellaktor S.A. in 2008. The company is headquartered in Athens, Greece.