David Siegel (Two Sigma)
American computer scientist and investor; co-founder and co-chairman of Two Sigma
| David Siegel
| |
|---|---|
| Born | 15 July 1961 (Forbes) The Bronx, New York (Forbes) |
| Nationality | American |
| Residence | Scarsdale, New York (Forbes) |
| Occupation | Investor; computer scientist |
| Known for | Co-founder and co-chairman of Two Sigma |
| Education | Princeton University; Massachusetts Institute of Technology (PhD, computer science) (Forbes) |
David Siegel (born 15 July 1961) is an American computer scientist and investor who co-founded the quantitative investment firm Two Sigma with John Overdeck in 2001. He was co-chief executive until September 2024 and is now co-chairman.[1][2] On 12 November 2026 the Forbes Real-Time Billionaires list ranked Siegel 394th in the world, with an estimated net worth of US$9.3 billion; Forbes lists the source of wealth as hedge funds.[2][3] In the annual World's Billionaires list published in 2026, Forbes had ranked Siegel 455th, at US$8.0 billion.[4]
Early career
Forbes says Siegel was born in the Bronx, earned a PhD in computer science at MIT and worked at the hedge funds D. E. Shaw and Tudor Investments. It says he founded his own internet start-up before starting Two Sigma with Overdeck.[2]
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 describes its largest business as a data-driven hedge fund that uses large amounts of information to predict securities prices.[2] On 28 August 2024 Two Sigma announced that Siegel and Overdeck would step down as co-chief executives on 30 September 2024 and remain co-chairmen, with Carter Lyons and Scott Hoffman succeeding them.[1]
Philanthropy
Forbes says Siegel's foundation, the Siegel Family Endowment, focuses on technology and society. It says the endowment has supported programmes including Scratch, which teaches children to code, and the MIT Center for Brains, Minds and Machines.[2] Forbes also says he supports open-source artificial intelligence and founded the non-profit Open Athena to build scientific models.[2]
Political activity
Itemised FEC records for the 2022–2026 cycles list contributions under his name with Two Sigma as employer. The FEC query used here returned only the 100 largest of the 1,846 records under the name "Siegel, David". The total below is drawn from that subset and is therefore a lower bound; the records are summarised as filed.[5]
Across the 50 non-memo records retrieved for the 2022–2026 cycles, the filtered total is US$575,900 (a lower bound). The largest recipient committees, as named in the filings, were DNC SERVICES CORP / DEMOCRATIC NATIONAL COMMITTEE (US$200,000), FF PAC (US$100,000), ZINC COLLECTIVE PAC (US$97,500), NEW YORK MAJORITY FUND (US$43,000), DIGIDEMS PAC (US$37,900).[5]
| Cycle | Total (US$, lower bound) | Records | Largest recipient committees (as filed with the FEC) |
|---|---|---|---|
| 2022 | $122,400 | 11 | DNC SERVICES CORP / DEMOCRATIC NATIONAL COMMITTEE ($100,000); DIGIDEMS PAC ($7,900); JACKIE GORDON FOR CONGRESS ($2,900); EMILIA SYKES FOR CONGRESS ($2,900) |
| 2024 | $267,500 | 11 | DNC SERVICES CORP / DEMOCRATIC NATIONAL COMMITTEE ($100,000); FF PAC ($100,000); DIGIDEMS PAC ($30,000); NEW YORK MAJORITY FUND ($21,000) |
| 2026 | $186,000 | 28 | ZINC COLLECTIVE PAC ($97,500); NEW YORK MAJORITY FUND ($22,000); LASHER FOR CONGRESS ($7,000); MENDOZA FOR CONGRESS ($7,000) |
Wealth history
Forbes has included this entry in its annual World's Billionaires list in 11 of the editions from 2001 to 2026 checked for this profile, starting with 2016. The table gives the rank and estimated net worth in each annual list, and, where applicable, the rank and estimate in the Forbes 400 list of the richest Americans.[4][2]
| Year | World's Billionaires rank | Net worth (US$ 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 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 David Siegel (Forbes data feed behind forbes.com/profile/david-siegel-1/) Forbes, live record, read 12 November 2026, accessed 12 November 2026.
- ↑ Forbes, Forbes Real-Time Billionaires data feed Forbes, live; downloaded 12 November 2026 09:42 UTC, accessed 12 November 2026.
- ↑ 4.0 4.1 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.
- ↑ 5.0 5.1 U.S. Federal Election Commission, OpenFEC Schedule A (itemised individual contributions) query, contributor name "SIEGEL, DAVID"; 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.