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SIG
SIG was founded in 1987 by Jeff Yass, Arthur Dantchik, and four others in Philadelphia as a market-making firm focused on exchange-traded options.
SIG
SIG was founded in 1987 by Jeff Yass, Arthur Dantchik, and four others in Philadelphia as a market-making firm focused on exchange-traded options. The partners — many of whom met at Binghamton University — structured the firm as a limited partnership, with profits distributed annually to partners and historically limited debt. Yass, an avid poker player and philanthropist, has been the public face of the firm, while Dantchik has maintained a lower profile. Through its private equity division Susquehanna Growth Equity (SGE), SIG invests across growth-stage technology companies with a focus on payments, FinTech, data analytics, and enterprise software. Notable SGE investments include BetMGM (per SGE, 2023), The College Board (per Bloomberg, 2019), and Paysafe (formerly Optimal Payments). The firm also runs a venture arm, Susquehanna Venture Capital, and a hedge fund unit. Geographically, SIG operates in the U.S., Europe, Israel, and China. SIG manages its own capital exclusively — no limited partners, no pensions, no institutions. The partnership employs roughly 2,500 people globally across trading, technology, and research. Additional offices include Philadelphia (global HQ), London, Dublin, Tel Aviv, and Shanghai. May 2025: SIG's political action committee and individual donations have made Yass the largest political donor in the 2024 election cycle (per OpenSecrets). Outside investing, Yass and Dantchik run the Susquehanna Foundation, which focuses on education and free-market advocacy. The firm's structural differentiator is its complete independence from external capital — a legacy of its trading origins — which allows it to hold assets for decades and avoid quarterly pressure. SIG also operates as a gambling-analysis powerhouse: Yass is a professional poker player, and the firm's quantitative culture extends to modeling political markets and sports betting. This DNA gives SIG an unusual tolerance for ambiguous outcomes and long time horizons.
General information
Firm type
Asset Manager
Year founded
1987
AUM
$40B–60B (per Forbes, 2024 estimate)
Location
Region
North America
Country
United States
City
Portola Valley
Corporate office
Portola Valley, CA, United States
Additional offices
Philadelphia, PA · London, UK · Dublin, Ireland · Tel Aviv, Israel · Shanghai, China
Principals
Jeff Yass
Co-Founder & Managing Director
Arthur Dantchik
Co-Founder & Managing Director
Steven Schuler
CEO, SIG Management
Michael Blaugrund
COO, SIG Management
Sector focus
Frequently asked questions
Who runs investment decisions at SIG?
Jeff Yass and Arthur Dantchik serve as Co-Founders and Managing Directors. Steven Schuler is CEO of SIG Management, the firm's administrative entity, and Michael Blaugrund is COO. The partnership votes on major capital allocation decisions. Investment teams at Susquehanna Growth Equity and the venture arm operate semi-autonomously with oversight from the partnership.
Is SIG structured as a family office or a hedge fund?
SIG is neither — it is a proprietary trading firm structured as a limited partnership. The firm does not manage outside capital. Its profits are distributed to partners, who collectively control the capital. SIG's private equity (SGE) and venture arms invest the partnership's own money.
How does SIG source proprietary deal flow?
SGE sources deals primarily through its network of operating partners and industry executives, many of whom are former SIG employees. The firm's roots in financial technology and market structure give it unique insight into payment rails, exchanges, and financial infrastructure. SGE often takes minority stakes with board seats.
What investment stages does SIG target via SGE?
Susquehanna Growth Equity typically invests in growth-stage technology companies, from Series B to pre-IPO. The venture arm covers earlier stages. SGE has raised $3.25B across six funds, with check sizes ranging from $20M to $100M. The firm will hold positions for five to seven years.
Does SIG participate in fund commitments or only direct deals?
SIG does not commit to outside third-party funds as a traditional LP. All investing is direct, through SGE, Susquehanna Venture Capital, or the firm's internal hedge fund and trading strategies. The partnership does occasionally co-invest alongside other families or institutions in specific deals.
What sectors does SIG explicitly avoid?
Publicly, SIG has not declared any prohibited sectors. However, SGE's known portfolio avoids early-stage biotech, hard tech, and regulated industries outside financial services. The firm is cautious on consumer-facing winners-take-most markets because of its quantitative, data-driven approach.
Where does the underlying wealth come from?
The wealth originates from SIG's proprietary market-making in exchange-traded options, which the founders started in 1987. The firm has never exited by selling equity or taking on outside capital. Partners' profits from this trading business are the single source of capital for all investment activities.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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