He’s the chairman of Sears Holdings Corporation, which includes Sears, Kenmore, Lands End, and Kmart (for which he helped to rebuild after bankruptcy). He’s also the founder, chairman, and CEO of ESL Investments, a private investment company that Lampert started at the ripe age of 25. In 2010 he was ranked #101 in Forbes’ list …

Kovner is founder and chairman of Caxton Associates, one of the world’s top ten hedge funds. The Harvard graduate underwent his first trade back in 1977 for $3,000, and is now worth an estimated $3.5 billion. He was recently appointed to the Board of Trustees of the Institute for Advanced Study, which has been home …

His estimated net worth is $17.5 billion, stemming from the success of Koch Industries, a privately owned energy conglomerate whose subsidiaries include Georgia Pacific, the maker of Brawny paper towels, and Invista, the maker of Stainmaster carpet and Lycra fiber. As of September, Koch had succeeded Michael Bloomberg as the richest man in New York City, …

He’s a self-made hedge fund billionaire who founded Tudor Investment Corp. thirty years ago. One of his earliest achievements was back in 1987 when he predicted “Black Monday,” an event that allowed him to triple his earnings. Since then Jones has been an active philanthropist; he founded the NYC poverty- fighting group the Robin Hood Foundation, which …

This Harvard graduate founded Harbinger back in 2001, the hedge fund investment firm known for betting against sub-prime mortgages, which have riskily earned the company more than $18 billion. His latest investment has been into wireless communications, as he tries to build a multibillion-dollar satellite network through his new company, LightSquared.