Stephen Mandel

Protege of hedge fund legend Julian Robertson cashing in on market turmoil. His Lone Pine Capital hedge fund up 57% before fees in 2007. Big wins with European, Asian, Latin American stocks. Assets: $17 billion. Consulting stint at Mars and Co., then Goldman Sachs. Became consumer analyst at Robertson's Tiger Management. Founded Lone Pine 1997. Firm said to have returned 25% annually net of fees. On board of Teach for America.