The $4.8 billion valuation includes an English soccer team, MLS team and other investments. : Manchester City celebrates after scoring during the UEFA Champions League group C match between ... [+] Manchester City and Shakhtar Donetsk at Etihad Stadium on November 26 (Photo by Laurence Griffiths/Getty Images) Abu Dhabi United Group is selling slightly more than a 10% stake in City Football Group to the private equity firm Silver Lake Partners for $500 million, placing a $4.8 billion valuation on the soccer group.