At-a-glance: Russia's business oligarchs
Mikhail Khodorkovsky

Boris Berezovsky

Vladimir Gusinsky

Vladimir Potanin

Mikhail Fridman

Roman Abramovich

Mikhail Khodorkovsky
Age: 40
Business: Ex-chief executive, Yukos, Russia's biggest oil company since its merger with Sibneft.
Worth: About $8bn, making him Russia's richest man.
Pedigree: Left Soviet Communist youth league to set up a banking business. Moved into oil in 1995.
Hobbies: Funding political parties