Susquehanna International Group

Susquehanna International Group, LLP

Company type	Privately owned
Industry	Trading, Financial services, Technology
Founded	May 1987 (1987-05)
Founder	Jeff Yass, Arthur Dantchik, and four others
Headquarters	Bala Cynwyd , United States
Area served	Worldwide
Key people	Jeff Yass, Arthur Dantchik
Products	Proprietary investments, institutional brokerage services, market making, customer trading solutions
Number of employees	3000+ (2024)
Website	sig.com

Susquehanna International Group, LLP (commonly known as SIG) is a privately owned multinational firm specializing in trading and technology, with a focus on proprietary investments spanning equities, fixed income, energy, commodities, indices, derivatives, private equity, and venture capital. The company provides institutional brokerage services, market making, and customer trading solutions.

As a designated primary market maker (DPM), SIG supports roughly 600 equity options and 45 index options across major exchanges such as CBOE, AMEX, PHLX, and ISE. Its market-making portfolio features prominent equities including Google, Goldman Sachs, JPMorgan Chase, GE, PepsiCo, Microsoft, alongside key indices like Nasdaq and Russell 2000.

Employing more than 3,000 professionals, SIG operates from 14 offices worldwide. These locations include North American cities like New York City, Chicago, San Francisco, Philadelphia, Boston, and Stamford; Sydney in Australia; Dublin and London in Europe; as well as Shanghai, Beijing, Hong Kong, and Tokyo in Asia.

History

Established in May 1987 by six entrepreneurs including Jeff Yass and Arthur Dantchik, SIG was founded near the Susquehanna River by graduates of the State University of New York at Binghamton. The firm experienced rapid growth, reaching 100 employees by 1988 with $30 million in revenue during its first year—driven in part by strategic put option trades ahead of the 1987 market crash. Throughout the late 1990s, SIG’s earnings frequently surpassed $1 billion as it diversified into convertible bonds, commodity options, index options and emerged as a leading ETF market maker.

In 1996, SIG established Heights Capital Management in San Francisco to concentrate on PIPE investments within healthcare and technology sectors. Its venture capital activities expanded with the creation of SIG China in 2005 and Susquehanna Growth Equity in 2006 targeting growth-stage software and information services firms based in the U.S. and Israel. By this period, SIG had developed a global presence with over a dozen offices.

Among its significant investments are Kuxun—later acquired by Expedia in 2009—and an early $5 million investment in ByteDance in 2012 that was valued at more than $15 billion by 2020. During the 2008 financial crisis, SIG remained resilient with assistance from government stabilization initiatives.

Key acquisitions include purchasing G1 Execution Services LLC from E-Trade in 2013. The company further expanded its venture capital footprint into Japan in 2014. In 2017, SIG launched Susquehanna Private Capital to focus on acquiring U.S. middle-market companies across industries such as aerospace, industrials, consumer goods, healthcare, and business services. That same year saw the founding of Nellie Analytics in Dublin to apply quantitative analysis to sports betting markets.

By 2018, SIG accounted for about seven percent of U.S. ETF trading volume and executed over $1.5 trillion in transactions globally each year. As of 2022, the firm continued to maintain an extensive international network with its 14 offices.

SIG also played a pivotal market-making role during the notable 2024 merger involving Digital World Acquisition Corp. and Trump Media & Technology Group.

The company’s operational model combines sophisticated trading technologies with a broad array of investment approaches under seasoned leadership including founders Jeff Yass and Arthur Dantchik. Its organizational framework supports worldwide activities across diverse financial markets while sustaining competitive advantages through proprietary trading expertise and targeted investments.

Affiliates

• Susquehanna Financial Group (SFG): The institutional broker-dealer branch of SIG, delivering order execution, trading flow solutions, and equity research coverage on close to 200 corporations.
• Susquehanna Structured Capital: Focuses on providing debt financing and structured equity investments to businesses in the middle and lower-middle market segments, along with commercial and multi-family real estate ventures.
• Susquehanna Foundation: The corporate philanthropic arm of SIG dedicated to supporting initiatives aimed at reforming educational systems.

Claims of front-running client trades

In 2009, the California Public Employees' Retirement System initiated a class action lawsuit against SIG and multiple broker-dealers, alleging that they prioritized trades for their own dealer accounts before executing client transactions. The matter was resolved in 2012 with SIG and other defendants consenting to pay $18.5 million.

Accusations of stock spoofing

In 2022, Northwest Biotherapeutics filed a lawsuit against SIG, Citadel Securities, Virtu Financial, among others, alleging manipulative spoofing practices that allegedly suppressed Northwest's stock value. This case was dismissed in 2024.