John Overdeck Net Worth

John Overdeck has an estimated net worth of $9.3 billion, according to Forbes Real-Time Billionaires, John Overdeck profile (figures as of October 20, 2026). That is up from $6.1 billion in 2019.

John Overdeck is an American hedge fund manager known for cofounding Two Sigma, a New York City investment firm built around math and technology. Before starting the company, he worked as a managing director at D.E. Shaw & Co. and later as a vice president at Amazon.com. He first stood out for math talent, winning a silver medal for the U.S. at the International Mathematical Olympiad in 1986 at age 16.

He built his fortune through Two Sigma, which he founded in 2001 with David Siegel and Mark Pickard. The firm uses artificial intelligence, machine learning, distributed computing, and other data-heavy methods in its trading strategies. Forbes says Two Sigma has more than $75 billion in assets under management, with its biggest business a hedge fund that studies huge amounts of information to predict security prices. Forbes placed his wealth at $9.3 billion in October 2026.

How John Overdeck makes money

Most of Overdeck’s wealth comes from Two Sigma, the quantitative investing firm he helped launch in 2001. The company is known for using data and technology to guide investing decisions. Its largest business is a hedge fund that processes large amounts of information to forecast the prices of securities. The firm also operates a market-making business, owns a Bermuda reinsurance company, and runs a venture capital arm.

Overdeck’s background helps explain that approach. He studied mathematics and statistics, then worked at D.E. Shaw & Co. and Amazon.com before helping build Two Sigma. Forbes classifies his wealth in hedge funds and places him in Finance & Investments. In 2024, he and David Siegel moved from co-CEOs to co-chairmen. In 2025, Overdeck returned to the firm’s management committee while staying in a leadership role at the company.

Forbes wealth timeline

Forbes valued Overdeck at $6.1 billion in 2019, and the same figure appeared again in 2020. The estimate then moved to $6.5 billion in 2021 and stayed there in 2022. In 2023, Forbes put his fortune at $6.8 billion, followed by $7.3 billion in 2024 and $7.4 billion in 2025. Across those years, his money remained tied to Two Sigma and its data-driven hedge fund business.

The latest Forbes reading is higher still. Forbes’ real-time tracker showed Overdeck at $9.3 billion in October 2026, after the 2026 Forbes World’s Billionaires List estimated $8 billion. That jump came while Two Sigma remained a major player with more than $75 billion in assets under management. Outside investing, Forbes also notes that he has given over $500 million through his family foundation, which supports education.