David Siegel was born in Scarsdale, New York, United States, is Co-Founder & Co-Chairman, Two Sigma Investments. David Siegel is #413 in List Billionaires People In The World. David Siegel is the co-founder of Two Sigma Investments,a quantitative trading powerhouse that manages $45 billion. Two Sigma is a data-driven hedge fund that absorbs large amounts of information to predict the prices of securities. Two Sigma also runs a market-making business, owns a Bermuda reinsurance company and operates a venture capital arm. Born in the Bronx, Siegel is a computer fanatic who got a computer science PhD from MIT and worked at hedge funds D.E. Shaw and Tudor Investments.