Hoping to regain credibility with international lenders keeping Greece afloat, the new conservative-led government has made speeding up privatizations a priority but has admitted delays from repeat elections in May and June.
After a meeting between political leaders and the finance minister on privatizations, the official said the government's priorities also included the sale of betting firm OPAP, the old Athens airport and buildings in Athens and on the islands of Corfu and Rhodes.
"What we're aiming for through the privatizations, apart from generating revenues, is to change the role of the state in the economy," the official said on condition of anonymity.
He said Russian, Italian, U.S. and French companies had expressed an interest in the natural gas company DEPA and gas grid operator DESPA.
Athens initially targeted privatization proceeds of €50 billion by 2015 but cut the target to €19 billion after a making slow start on the program.
Former privatizations chief Costas Mitropoulos, who stepped down last month after accusing the government of hindering his efforts to sell assets, estimated that Athens would not raise more than €300 million from privatizations in 2012. It had targeted €3 billion for this year.
More than 90 percent of the privatization program includes the lease and sale of concessions of state land and infrastructure, the government has said.
Last year, bailed-out Greece moved to sell its historic ports, the Port of Piraeus and the Thessaloniki Port.
Athens also aims to sell its Olympic sites and airports. Earlier this month, Greece's finance ministry said it has sold four Airbus A340-300 jets once owned by the now defunct carrier Olympic Airways to Apollo Aviations Group for $US40.4 million.
'This sale is included in privatisation plans as part of the medium-term strategy for Greek finances' demanded by international creditors, the ministry said in a statement.