The ministry owns 85.01% in Romgaz.
Brokerage firms that want to run the initial public offering in Bucharest are expected to present their bids to the ministry by December 29.
Under its loan agreement with the IMF, Romania has pledged to sell minority stakes of 10% to 15% in key energy and gas producers, including Romgaz, Nuclearelectrica, Transelectrica, Transgaz and Hidroelectrica.
Romgaz reported a net profit of 677.7 million (EUR156.7 million) in the first eight months, more than double on the year, on total sales of RON2.57 billion. (EUR1=RON4.3397)