John Albert Overdeck is an American businessman, the self-made billionaire Co-founder and Co-chairman of Two Sigma Investments, a massive quantitative hedge fund. Born in 1969, his career is rooted in elite mathematics and computer science. His father was a senior mathematician for the National Security Agency (NSA).

Overdeck's academic achievements are extraordinary: in 1986, he won a Silver Medal for the U.S. in the International Mathematics Olympiad. He earned a bachelor's degree in Mathematics and a master's degree in Statistics, both from Stanford University. His philosophy centers on using artificial intelligence, machine learning, and distributed computing to execute complex trading strategies.

• Two Sigma Investments (Co-founder & Co-chairman): The core private asset, a massive quantitative hedge fund with $41 billion in assets under management (AUM) (2017 estimate).
• Quantitative Trading Apex: His firm uses AI, machine learning, and distributed computing for its trading strategies.
• Math Prodigy: He won a Silver Medal in the International Mathematics Olympiad in 1986.
• Former Executive: He was a managing director at D.E. Shaw & Co. and a Vice President at Amazon.com before founding Two Sigma.

John Overdeck co-founded Two Sigma Investments in 2001 with David Siegel and Mark Pickard. His strategic genius was his commitment to institutionalizing quantitative trading and the belief that data and algorithms could generate superior, risk-adjusted returns over human intuition. Under his leadership, Two Sigma grew into a colossal enterprise, operating a market-making business and running a venture capital arm.

His wealth is secured by the colossal, long-term, superior returns generated by his fund's systematic trading models. He is an active philanthropist through the Overdeck Family Foundation, funding educational research and STEM education (focusing on inspired minds). He is the acting chair of the National Museum of Mathematics and a major donor to the Robin Hood Foundation.

John Overdeck's social impact is structural, stemming from Two Sigma's role in pioneering the use of AI and machine learning in financial markets. His profound philanthropic contribution is through the Overdeck Family Foundation, which is dedicated to strengthening learning and unlocking the potential of American children through STEM education (supporting the Khan Academy and the Harlem Children's Zone).

His structural contribution is tied to his belief in mathematics and data-driven decision-making as foundational to both finance and social progress.

John Overdeck maintains the professional, intellectual style of a quantitative executive. His attire is consistently formal and high-quality, favoring tailored suits. His aesthetic reflects stability and immense intellectual authority, typical of a leader in the secretive world of hedge fund management.

Residing in Millburn, New Jersey, his luxury is the immense security and financial reward derived from his multi-billion dollar fortune. His life is dedicated to quantitative finance, STEM philanthropy, and the long-term stewardship of the algorithmic trading empire.