Russia's richest man sells 10% stake in USM By: CNBC.com News August 13, 2014 at 02:28 AM EDT Russia's richest man, Alisher Usmanov, is selling a 10 percent stake in his company USM as a "motivational incentive" for the firm's management team. Read More >> Related Stocks: Pjsc Megafon Gdr Reg S