The Polish government plans to keep control of key companies in the energy sector and eventually sell off all non-key assets, Treasury Minister Mikolaj Budzanowski told reporters Friday.

The government earlier singled out a number of companies in which it wants to keep at least 25% of the shares, such as PKO Bank Polski SA (PKO.WA) and insurer PZU SA (PZU.WA)

"If we talk about assets that are key from the point of view of the state, where we made a decision to keep control, in energy companies and at a level guaranteeing [control], we'll keep it," he said. "Everything that's beyond that will be turned into cash. It will be the driving force of our investments."

The government will put state-owned BGK bank and a new state fund in charge of privatizations from 2014, he also said. The new fund is expected to invest 40 billion zlotys ($12.7 billion) in projects by 2015, Prime Minister Donald Tusk said earlier Friday.