in 2003, alfa group sold exactly half of tnk to british petroleum (bp) for us$6.15 billion, in what was the biggest foreign investment in russia to date equivalent to $8 billion in invested assets. the deal resulted in the formation of the oil company tnk-bp, with half of the joint venture owned by bp, and the other 50 percent owned by the alfa group together with billionaire partners viktor vekselberg, and leonard blavatnik. from 2003 to 2013, khan was executive director of tnk-bp management (now called tnk-bp holding), and a member of the management board. while managing tnk-bp, khan remained involved with the alfa group at large. alfa group bought a stake in turkcell in 2005, and by april 2007, alfa group controlled a 43.5% stake in kyivstar, a ukrainian telecom company.