This hedge fund guru's tech focus helped shore up his returns: flagship fund down 17% in 2008. Father ran Asian operations for Singer Sewing Co. This Sri Lanka-native studied engineering at U. of Sussex in England, then M.B.A. at Wharton 1983. His early career was spent at the investment banking boutique Needham & Co. He became the president in 1991. He then founded the hedge fund Galleon Group 6 years later; making big bets on health care, technology companies. The venture's annual returns included 22% net of fees since inception.In 2009, the firm was believed to manage $6 billion across 6 funds.

In 2011, Raj Rajaratnam was found guilty on all 14 counts of securities fraud and conspiracy, according to multiple reports. The announcement was made in a lower Manhattan federal court. For now, Rajaratnam, who ran one of the world's largest hedge funds, will be free on bail, but will be fitted with an electronic monitoring device.

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