Steven A Cohen

Son of a dress manufacturer grew up in Great Neck, N.Y. Attended Wharton; became options trader at Gruntal & Co., netted $8,000 first day on the job. Founded hedge fund SAC Capital 1992 with $25 million under management. Today SAC manages $16 billion across 9 funds; accounts for more than 2% of daily volume on New York Stock Exchange. Has returned 33% net of fees annually. Steep fees: charges 3% of assets, 35% of profits on most funds. Cools trading floor to 70 degrees to keep employees on toes.