GEK Terna SA engages in the development and management of investment property, construction of any kind, the management of self-financed or co-financed projects, the construction and, operation of energy projects. The company is headquartered in Athina, Attiki and currently employs 5,281 full-time employees. The firm operates under the following segments: Construction, which refers to contracts for the construction of technical projects; Electricity from Renewable Sources of Energy, which refers to the electricity production from wind generators, from hydroelectric projects and other renewable energy sources; Electricity from Thermal Energy Sources and Trading of Electric Energy, which refers to the electricity production using natural gas as fuel, and to the trading of electric energy; Real Estate Development, which refers to the purchase, development and management of real estate; Industry, which refers to the production of quarry products and the exploitation of magnesite quarries; Concessions, which concerns the construction and operation of infrastructure, other public interest projects and other facilities, as well as Holdings.