Owner of Britain's Chelsea soccer team and probably Russia's best-known oligarch, Mr. Abramovich's fortune originated – like that of virtually all other top Russian tycoons – in murky wheeling and dealing during the corrupt Kremlin-run privatizations of the 1990's. Along with his former partner, Boris Berezovsky, Abramovich acquired a major stake in the state oil firm Sibneft for a fraction of its real worth. After Putin came to power, Abramovich was accused of tax evasion and other crimes and for a while it looked like he might share the fate of Mikhail Khodorkovsky and wind up in prison. But Abramovich appears to have made his amends with the Kremlin – he served for eight years as governor of the remote Siberian province of Chukotka, investing more than $1 billion of his own money in social improvements. He now spends most of his time in London, where he is reportedly building a $250 million home in the exclusive district of Belgravia. Last time the rankings were published, Abramovich was No. 3.