Businessperson of the Year

The Russian investment boutique (formerly known as Digital Sky Technologies) stands to become one of the hottest public offerings this year thanks to the company's investments in Internet darlings Groupon and Zynga, as well as controlling stakes in companies that account for some 75% of the pages served on the Russian-speaking web. But the biggest jewel in Milner's crown is a roughly 8% stake in Facebook, an $800 million investment that makes Mail.ru the social network's second-largest outside investor.

--P.N.

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