How John built the fortune
Overdeck's wealth rests on his ownership of Two Sigma Investments, the quantitative investment firm he started in 2001 together with David Siegel, a computer scientist he had worked with earlier. The founders set out to run money using models built from large data sets and tested with the methods of science, rather than relying on the judgement of individual stock pickers. Two Sigma's trading systems look for patterns across markets and execute large numbers of trades automatically.
The firm grew quickly in the years after the 2008 financial crisis, when investors were looking for strategies that behaved differently from traditional funds. Its assets under management rose into the tens of billions of dollars, and it hired heavily from mathematics, physics and computer science programmes, sometimes describing itself as closer to a technology company than a classic hedge fund. As cofounders and the largest owners, Overdeck and Siegel receive a large share of the management and performance fees the firm earns.
Over time Two Sigma broadened its activities beyond its main funds. It built businesses in market making, insurance analytics, private investments and venture capital, which spread the firm's income across several sources and added to the value of the founders' stakes.
The partnership between the two founders has been unusually durable. Overdeck has generally been associated with the investment and business side of the firm, while Siegel has been seen as the engineering leader, though both have shaped its research culture. They have shared the top leadership roles for most of Two Sigma's history and have kept ownership largely in their own hands rather than selling large stakes to outside investors or listing the company.
Companies and holdings
Overdeck's business interests are concentrated in the Two Sigma group, which includes:
- Two Sigma Investments, the quantitative asset manager and core of the group
- Two Sigma Securities, a market making business
- Two Sigma Ventures, which backs early stage technology companies
- Two Sigma Impact, a private equity effort focused on workforce outcomes
Two Sigma is privately held, so its finances are not published in detail. The firm is headquartered in New York, with offices in other financial centres, and employs a large staff of researchers and engineers. Overdeck serves as co-chairman alongside Siegel.
Early life and career
John Anthony Overdeck was born in 1969. He showed a gift for mathematics early and won a silver medal at the International Mathematical Olympiad as a teenager, representing the United States. He went on to Stanford University, where he earned a bachelor's degree in mathematics and a master's degree in statistics.
After university he joined D. E. Shaw, one of the pioneers of computer driven investing, where he worked on trading and rose to a senior position. He then spent time at Amazon in its early years, working on operations and international expansion as the company grew from an online bookseller into a broader retailer. In 2001 he left to start Two Sigma, bringing together the quantitative finance he had learned at D. E. Shaw and the data heavy culture he had seen at Amazon.
His time at D. E. Shaw exposed him to the idea that markets could be studied like a scientific problem, with hypotheses tested on historical data. His period at Amazon added an appreciation for building large, reliable software systems and for using data to make operational decisions at scale.
Philanthropy and public life
Overdeck and his wife, Laura, run the Overdeck Family Foundation, which concentrates on education, particularly mathematics and science learning for children both in school and at home. The foundation funds research, programmes and nonprofits that aim to improve how children learn, and it publishes much of its grant making approach. Laura Overdeck also founded Bedtime Math, a nonprofit that encourages families to share simple math problems with children as part of their daily routine.
Overdeck has supported organisations that encourage young people to take part in math competitions, reflecting his own path. He keeps a low public profile, rarely speaks to the press and is seldom seen at industry events, which fits the reserved culture of the firm he helped build.