Yuri Gretkov is a major antagonist of The Bourne Supremacy. He was a Russian oil magnate who's in league with CIA deputy director Ward Abbott in the theft of the agency's seed money.
In the late 90s, Yuri Gretkov conspired with Ward Abbott to steal $20 million from an CIA black fund, presumably keeping his half, while him used his share to establish an oligarchy by buying shares from major oil pipelines. However, the deal was discovered by a Russian politician, Vladimir Neski, who arrived in Berlin, Germany, in order to disclose the theft of the allocated funds. To prevent this from happening, Abbott ordered his subordinate Alexander Conklin to silence Neski. Conklin chooses Jason Bourne to eliminate Neski. Afterwards Conklin selects Bourne into the newly CIA formed Operation Treadstone.
The Bourne Supremacy
Knowing that fellow CIA Deputy Director Pamela Landy and her team were attempting to buy off the "Neski files", documents about the theft of $20 million seven years earlier, Gretkov hired FSB agent Kirill to kill the two operatives who were retrieving files that proved Gretkov and Abbott stole the money. Gretkov later attempt to blame on Kirill and kill J Bourne so that the trail would go cold. However, Bourne manages to survive and Gretkov was arrested by Landy following Kirill's death at the hands of Bourne.