It said exploitation revenues were 4.1% lower on the year in the first half, amounting to RON774.9 million.
It had a turnover of RON938.8 million in the first half, up 6.26% compared with the same period last year.
Transgaz had assets of RON5.3 billion end-June, 6.71% higher compare diwth end-December 2018, while total debt climbed 30% in the same period, to RON1.6 billion.
The company is 58.5% owned by the Romanian state.