Only two years later the trio established Alfa-Bank, now the biggest private bank in Russia. Then in the late 1990s the group bought Tyumen Oil from the state and merged it with BP’s Russian assets to form TNK-BP. Khan’s co-owned Alfa Group also holds interests in Vimpelcom cellular company and the biggest retailer, X5. A Kiev native, Khan went to Moscow to study, but eventually became a billionaire father of five children who live in the outskirts of the city.