DEPA SA is a group of companies that consists of DESFA, the Hellenic Transmission System Operator and three Gas Supply companies (EPA of Attica, Thessaloniki and Thessaly). Three additional Gas Supply Companies are under establishment in the regions of Central Greece & Evia, Eastern Macedonia & Thrace, and Central Macedonia. DEPA SA participates by 50% in IGI POSEIDON S.A., the company responsible for the construction and operation of the offshore gas pipeline connecting Greece with Italy. Through IGI POSEIDON S.A., DEPA participates in ICGB EAD, the company which will undertake the development of the pipeline between Greece and Bulgaria (Interconnector Greece-Bulgaria-IGB). DEPA Group is the gas supplier of power generation units, industrial plants, domestic and commercial customers, who increasingly choose natural gas to cover their energy needs. DEPA operates two Compressed Natural Gas (CNG) refueling stations which supply public transport buses and garbage collection vehicles, and currently expands its activity within the sustainable transport sector to private-use vehicles.