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10Mikhail Prokhorov - $11.4 billion

Via www.pagesix.com

Mikhail Prokhorov founded Onexim Group, a Russian holding company involved in banking, insurance, sports and energy. The group holds a 17% stake in the world's biggest aluminum producer United Co. Rusal, and a 27% stake in Uralkali, Russia's largest potash producer.

In 2011 Prokhorov ran as

an independent candidate in the 2012 Russian presidential elections. He was unsuccessful, coming in third with just over 7% of votes. In 2012 he established a new Russian political party, the 'Party of Civic Platform'. Prokhorov also owns 80% of the NBA's Brooklyn Nets as well as Barclay's Center arena.

Next 9 Alexey Mordashov - $12.1 billion

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