The company said in its preliminary earnings report its revenue increased 1%, to RRON1.7 billion, compared with RON1.69 billion in 2014.
Transgaz reported total expenses of RON1.09 billion, 1% higher than in 2014.
Romanian natural gas transmission company Transgaz (TGN.RO) on Monday said its net profit declined 3% on the year in 2015, to RON487.7 million, from RON502.5 million in 2014.