In 1992, at the age of 27, Prokhorov partnered with Potanin to run Interros, a holding company that they used in 1995 to effect the purchase of Norilsk Nickel, one of Russia's largest nickel and palladium mining and smelting companies. During the largely un-regulated privatization of former state-controlled industries after the collapse of the USSR, Prokhorov and Potanin (the latter by then a deputy prime minister who oversaw privatization) were able acquire the shares from the workers of Norilsk Nickel for a fraction of their estimated market value and seize ownership of the company. When he departed in 2007, Prokhorov's share of the company was worth US$7.5 billion.