John Overdeck
American investor; co-founder and co-chairman of Two Sigma
| John Overdeck
| |
|---|---|
| Born | 21 December 1969 (Forbes) |
| Nationality | American |
| Residence | Palm Beach, Florida (Forbes) |
| Occupation | Investor |
| Known for | Co-founder and co-chairman of Two Sigma; chair of the Institute for Advanced Study |
| Education | Stanford University (BA/BS, MS) (Forbes) |
John Overdeck (born 21 December 1969) is an American investor who co-founded the quantitative investment firm Two Sigma with David Siegel in 2001. He was co-chief executive until September 2024 and is now co-chairman.[1][2] Since 2023 he has chaired the board of trustees of the Institute for Advanced Study in Princeton.[3] On 12 November 2026 the Forbes Real-Time Billionaires list ranked Overdeck 393rd in the world, with an estimated net worth of US$9.3 billion; Forbes lists the source of wealth as hedge funds.[2][4] In the annual World's Billionaires list published in 2026, Forbes had ranked Overdeck 455th, at US$8.0 billion.[5]
Early career
Forbes says Overdeck won a silver medal at the International Mathematical Olympiad at 16.[2] Two Sigma says he began his career at D. E. Shaw & Co., where he rose to managing director. He then spent two years at Amazon.com, starting as vice president and technical assistant to Jeff Bezos, before co-founding Two Sigma in 2001.[1]
Two Sigma
Two Sigma says it was founded in 2001 by Siegel, a computer scientist, and Overdeck, a mathematician, and that it manages around US$60 billion with about 2,000 employees.[1] Forbes says its largest business is a data-driven hedge fund, and that the firm also runs market-making, reinsurance, venture capital, private equity and real estate businesses.[2] On 28 August 2024 Two Sigma announced that Overdeck and Siegel would step down as co-chief executives on 30 September 2024 and remain co-chairmen, with Carter Lyons and Scott Hoffman succeeding them.[1] Forbes says Overdeck returned to the firm's management committee in 2025.[2]
Philanthropy
Forbes says Overdeck has given more than US$500 million through his family's charitable foundation, which supports education.[2] The Institute for Advanced Study elected him chair of its board in May 2023, succeeding Charles Simonyi. He had been a trustee and co-chair of its investment committee since 2015.[3]
Political activity
Itemised FEC records for the 2022–2026 cycles list contributions under his name with Two Sigma as employer. They are summarised below as filed.[6]
Across the 5 non-memo records retrieved for the 2022–2026 cycles, the filtered total is US$17,400 (a lower bound). The largest recipient committees, as named in the filings, were KEAN FOR CONGRESS INC (US$12,400), PROVEN CONSERVATIVES PAC - FEDERAL (US$5,000).[6]
| Cycle | Total (US$, lower bound) | Records | Largest recipient committees (as filed with the FEC) |
|---|---|---|---|
| 2022 | $5,800 | 2 | KEAN FOR CONGRESS INC ($5,800) |
| 2024 | $6,600 | 2 | KEAN FOR CONGRESS INC ($6,600) |
| 2026 | $5,000 | 1 | PROVEN CONSERVATIVES PAC - FEDERAL ($5,000) |
Wealth history
Forbes has included this entry in its annual World's Billionaires list in 11 of the editions from 2001 to 2026 checked for this profile, starting with 2016. The table gives the rank and estimated net worth in each annual list, and, where applicable, the rank and estimate in the Forbes 400 list of the richest Americans.[5][2]
| Year | World's Billionaires rank | Net worth (US$ bn) | Forbes 400 rank | Forbes 400 net worth (US$ bn) |
|---|---|---|---|---|
| 2015 | – | – | 234 | 2.8 |
| 2016 | 549 | 3.1 | 194 | 3.3 |
| 2017 | 339 | 4.8 | 122 | 4.9 |
| 2018 | 404 | 4.9 | 118 | 5.5 |
| 2019 | 267 | 6.1 | 108 | 6.1 |
| 2020 | 253 | 6.1 | 95 | 6.5 |
| 2021 | 404 | 6.5 | 147 | 6.5 |
| 2022 | 386 | 6.5 | 126 | 6.8 |
| 2023 | 352 | 6.8 | 137 | 7.3 |
| 2024 | 364 | 7.3 | 160 | 7.4 |
| 2025 | 430 | 7.4 | 172 | 8.0 |
| 2026 | 455 | 8.0 | 170 | 9.3 |
International and political links
This section uses the same ten headings for every profile in this series. Only specific, sourced actions are included; company-level and foundation-level actions are labelled as such. Where nothing was found, the entry reads "No documented involvement found in sources checked."
Israel (investments, operations, donations, contracts, statements)
No documented involvement found in sources checked.
Zionist or pro-Israel organisations and lobbying groups
No documented involvement found in sources checked.
Jewish communal charities
No documented involvement found in sources checked.
Gulf states
No documented involvement found in sources checked.
China
No documented involvement found in sources checked.
Russia
No documented involvement found in sources checked.
India
No documented involvement found in sources checked.
Palestinian or Arab causes
No documented involvement found in sources checked.
Home government
No documented involvement found in sources checked.
Other international links
No documented involvement found in sources checked.
See also
Notes
- ↑ 1.0 1.1 1.2 1.3 Two Sigma, Two Sigma Announces Leadership Changes Two Sigma, 28 August 2024, accessed 12 November 2026.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Forbes, Forbes profile record for John Overdeck (Forbes data feed behind forbes.com/profile/john-overdeck/) Forbes, live record, read 12 November 2026, accessed 12 November 2026.
- ↑ 3.0 3.1 Institute for Advanced Study, John Overdeck Elected Chair of the IAS Board of Trustees Institute for Advanced Study, 8 May 2023, accessed 12 November 2026.
- ↑ Forbes, Forbes Real-Time Billionaires data feed Forbes, live; downloaded 12 November 2026 09:42 UTC, accessed 12 November 2026.
- ↑ 5.0 5.1 Forbes, Forbes World's Billionaires list data feed, annual editions 2001–2026 (one file per year at this path with the year substituted; all 26 files downloaded and read) Forbes, annual lists; downloaded 20 October 2026, accessed 12 November 2026.
- ↑ 6.0 6.1 U.S. Federal Election Commission, OpenFEC Schedule A (itemised individual contributions) query, contributor name "OVERDECK, JOHN"; 2026 cycle shown in link, the 2022, 2024 and 2026 cycles were queried together with the same parameters; top 100 records by amount; records filtered by employer/occupation and name, memo entries excluded U.S. Federal Election Commission, data as filed; queried 12 November 2026, accessed 12 November 2026.