John Paulson
Net Worth: $12 billion
Profession: New York financier
How He Got Rich: He is the president of Paulson & Co., Inc., a New York-based hedge fund.
Fast Facts: Like most of his fellow billionaires, he went to Harvard University and got a Master degree in Business. In 2010, he donated $20 million to New York University Stern School of Business to help fun their department.