OJSC "Yukos Oil Company" was an oil and gas company based in Moscow, Russia. Yukos was acquired from the Russian government by Russian oligarch Mikhail Khodorkovsky's Bank Menatep during the controversial "loans for shares" auctions of the mid 1990s. Between 1996 and 2003, Yukos became one of the largest and most successful Russian companies, producing 20% of Russia's oil output. In the 2004 Fortune 500, Yukos was ranked as the 359th largest company in the world. In October 2003, Khodorkovsky—by then the richest person in Russia and 16th richest person in the world—was arrested, and the company was forcibly broken up for alleged unpaid taxes shortly after and declared bankrupt in August 2006. Courts in several countries later ruled that the real intent was to destroy Yukos and obtain its assets for the government, and act politically against Khodorkovsky. In 2014, the largest arbitration award in history, $50 billion (€37.2 billion), was won by Yukos' former owners against Russia. This $50 billion award by the Permanent Court of Arbitration was ruled invalid by the District court in The Hague in 2016, but reinstated by the Court of Appeal of the Hague in 2020.

Russian oligarchs are business oligarchs of the former Soviet republics who rapidly accumulated wealth in the 1990s via the Russian privatisation that followed the dissolution of the Soviet Union. The failing Soviet state left the ownership of state assets contested, which allowed for informal deals with former USSR officials as a means to acquire state property.