Jeff Yass

Yass is a cofounder of Susquehanna International Group, one of Wall Street's largest and most successful trading firms.

He went to SUNY Binghamton, became a pro gambler, then began trading on the Philadelphia Stock Exchange in 1981 backed by billionaire Israel Englander.

In 1987, he cofounded Susquehanna with a handful of partners; it's now a giant in options trading and making markets, with 2,000 employees worldwide.

It recruits and trains traders using poker tournaments to sharpen decision-making skills; its traders have won 3 World Series of Poker bracelets.

Susquehanna has invested in hundreds of private companies globally, including TikTok parent ByteDance and payments firm Payoneer.