GEK TERNA Holdings, Real Estate, Construction S.A., together with its subsidiaries, engages in the construction, real estate, mining, electricity, and concession businesses in Greece, the Balkans, the Middle East, Eastern Europe, the United States, and internationally. The company is involved in the construction of motorways, rail networks, buildings, hospitals, museums, industrial facilities, hydroelectric projects, dams, power plants, etc. for public and private sectors; and the financing, management, and commercial operation of concession projects, such as motorways and parking stations. It also develops and operates wind farms, hydroelectric projects, waste treatment and biogas production plants, and photovoltaic parks, as well as develops pumped storage and infrastructure projects. In addition, the company produces 895.3 MW of electric energy and trades in natural gas. Further, it engages in the acquisition, development, and exploitation of real estate properties, including business centers, industrial parks, entertainment parks, residential properties, hotels, etc.; production of quarry products; and exploitation of magnesite quarries. Additionally, the company operates thermal power plants with a total installed capacity of 147 MW and 435 MW in Viotia, Greece. GEK TERNA Holdings, Real Estate, Construction S.A. was formerly known as Ermis Real Estate Constructions Enterprises S.A. The company was founded in 1960 and is headquartered in Athens, Greece.