Trading & Options · Profile from Trading and Options Research Companion
Two Sigma
The New York quantitative manager that John Overdeck and David Siegel — both from D. E. Shaw — founded with Mark Pickard in 2001, with seed money from Paul Tudor Jones, to run trading as a data-science and engineering problem: thousands of machine-learning forecasts from market and alternative data, combined by a central optimiser. It grew from ~$8bn (Nov 2011) to ~$60bn (May 2019) and ~$70bn (2025) (Wikipedia, reported). Its story turns on technology and data at scale — and model governance: the same pipeline that lets hundreds of researchers contribute models let one of them, Jian Wu, alter at least 14 models undisclosed from Nov 2021 to Aug 2023, harming some clients by at least ~$165m; on 16 Jan 2025 the SEC fined Two Sigma's two advisers $90m for leaving known model vulnerabilities unfixed from March 2019 to August 2023 (SEC release 2025-15), and Wu was indicted in September 2025 and is a fugitive (SDNY, reported). The founders' public feud, disclosed as a client risk in March 2023, led them to step down as co-CEOs in 2024, and in 2026 still drove investor redemptions despite good returns (reported).
At a glance
- Founded
- 2001, New York, by John Overdeck, David Siegel and Mark Pickard, with seed funding from Paul Tudor Jones (Wikipedia)
- Headquarters
- New York (SoHo); other offices in Houston, London, Hong Kong, Shanghai, Tokyo and elsewhere (from memory, verify)
- Ownership / structure
- Private; controlled by the founders. Advisers: Two Sigma Investments LP and Two Sigma Advisers LP (SEC-registered, per SEC release 2025-15); a broker-dealer and market maker, Two Sigma Securities (from memory, verify)
- Leadership (2026)
- Co-CEOs Carter Lyons and Scott Hoffman since 30 Sep 2024; Overdeck and Siegel co-chairmen (Wikipedia, reported); dispute over a further co-CEO appointment reported Sep 2026 (Hedgeweek/Bloomberg)
- Funds
- Spectrum (equity quant); Absolute Return and Absolute Return Enhanced (multi-strategy); Compass and Compass Enhanced (macro); risk-premia funds (reported)
- Scale (dated, reported)
- ~$8bn (Nov 2011); $23bn (Oct 2014); $32bn (end-2015); >$50bn (Oct 2017); $60bn (May 2019); $58bn (Oct 2020, after losses); ~$60bn in Two Sigma Investments (Jan 2024, Hedgeweek); $70bn (2025) (Wikipedia unless stated); ~2,000 staff (2026, Wikipedia)
- Returns (reported, net)
- 2023: Spectrum +8.6%, Absolute Return +12%, Compass −6%, Compass Enhanced −16% (Bloomberg via Hedgeweek, Jan 2024); 2025: Absolute Return Enhanced +15%; 2026 to Aug: +12.4% (Bloomberg via Hedgeweek, Sep 2026)
- Regulators
- SEC (advisers; broker-dealer); FINRA; CFTC/NFA for futures (verify)
- Signature moves (incl. failures)
- Founding as a data-science fund (2001); scaling Spectrum, Compass and Absolute Return (2011–19); crowdsourcing, Venn and ventures (2014–18); 2020 risk-premia and macro losses; the founders' feud disclosed (Mar 2023); unauthorised model changes discovered (2023); founders step down as co-CEOs (2024); SEC $90m order and Wu's indictment (2025); selling Venn, spinning out ventures and redemption pressure (2026)
8 strategic moves analysed
Each one gets a full strategy file in the companion: context, the decision, the financing, what happened, and the lesson.
2001
Founding a Data Science Hedge Fund
Founding or fund launch / new strategy
2014
Scaling Spectrum Compass and Absolute Return
Capital raise / new strategy, product or market
2020
Risk Premia and Macro Losses
Loss, drawdown or blow-up response
2023
Founders Feud Disclosed as a Client Risk
Hiring, spin-out or partner departure (governance and key-person event)
2023
Unauthorised Model Changes Discovered
Rogue trade or control failure
2024
Founders Step Down as Co CEOs
Hiring, spin-out or partner departure (leadership succession)
2025
SEC 90m Order and the Wu Indictment
Regulatory, enforcement or legal action
2026
Venn Sale Ventures Spin Out and Redemptions
Restructuring / strategy pivot (refocus on trading)