(Reuters) – Sberbank could be an attractive candidate for further privatisation, German Gref, CEO of Russia’s biggest bank, said on Friday, as the government looks to stimulate profitability and cut costs at state-owned companies. The Russian government owns controlling stakes in many large companies, including a 50% plus one share stake in Sberbank. Russian Finance Minister Anton Siluanov said this week there were about 30 large companies where the state could possibly cut its shareholding, but he did not name any. Gref also did not name any companies when asked about the plan in an interview…