GEK Terna Holding Real Estate Construction SA is a building construction company engaged in the development and management of investment property. The firm constructs property of any kind, manages self-financed or co-financed projects, operates energy projects, as well as its, participates in companies having similar activities. It operates in seven business segments, Construction, Electricity from RES, Electricity from thermal energy and EP/NG trading , Real Estate, Mining/Industry, Concessions, and Holding. GEK Terna operates in Greece, Balkans, Eastern Europe, the USA, and other regions.