Who is Jeff Yass?
Jeff Yass is the co-founder and managing director of the trading firm Susquehanna International Group (SIG) and a large early investor in TikTok’s parent, ByteDance. Forbes’ real-time list valued him at $77.79 billion on 20 October 2026, 27th in the world, and he is the richest person in Pennsylvania 12.
How did Jeff Yass make his money?
Through SIG, the Philadelphia-area trading and technology firm he co-founded in 1987 with five friends from Binghamton University, and through an early bet on ByteDance. SIG is described as the largest trader of liquid stocks in the US. Fortune reported that SIG holds about 15% of ByteDance and that Yass personally owns about 7% 134. His fortune was $27.6 billion in April 2024, so it has nearly tripled in two and a half years 1.
Early life and education
Jeffrey Steven Yass was born in July 1958 in Queens, New York. He earned a bachelor’s degree at the State University of New York at Binghamton and also attended New York University. He was an avid poker player and applied poker-style probability thinking to options trading 125.
Susquehanna International Group
He and five fellow Binghamton students co-founded SIG in 1987, with Arthur Dantchik among them. He is its managing director 13. Read Jeff Yass’s companies.
Politics and giving
He is a registered Libertarian who gives mainly to Republican candidates and causes, and he joined the executive advisory council of the Cato Institute in 2001 167.
Family
He is married to Janine Coslett Yass, and they raised four children in Haverford, Pennsylvania 18.
Jeff Yass net worth
Forbes valued him at $77.79 billion on 20 October 2026, about ₹7.3 lakh crore at ₹94 to the dollar, after ranking him 28th at $67.4 billion on its March list 2. See Jeff Yass net worth and our ranking of the top 50 richest people in the world.