Thomas Peterffy
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Who is this?
Thomas Peterffy (born September 30, 1944) is a Hungarian-born American billionaire businessman. He is the founder, chairman and the largest shareholder of Interactive Brokers. As of November 2025, his estimated net worth is US$57.3 billion, making him the 27th richest person in the world. Peterffy worked as an architectural draftsman after emigrating to the United States, and later became a computer programmer. In 1977, he purchased a seat on the American Stock Exchange and played a role in developing the first electronic trading platform for securities. Peterffy is a donor to the Republican Party and conservative causes.
Career
- 1944Born
Trivia
- •Place of birth: Budapest
- •Citizenship: United States
- •Known as: businessperson
What happened recently
Interactive Brokers founder: 'Customers are concerned about the AI sector in general'
Prediction Markets Will Be the Next Big Thing in Trading, Interactive Brokers Chair Thomas Peterffy Says
Interactive Brokers’ Thomas Peterffy on Prediction Markets, Best Execution and AI
Thomas Peterffy, The $101 Billion Man You've Never Heard Of, Is About To Pass Bill Gates
Thomas Peterffy’s Bold Vision for Prediction Markets: Why Interactive Brokers Is Betting Big on “Useful” Bets
Interactive Brokers Founder Says Legalizing Insider Trading Would Make Markets More Fair
A stealth prediction markets startup has deep ties to Interactive Brokers' billionaire chairman Thomas Peterffy
Interactive Brokers' Thomas Peterffy talks quarterly results ahead of investors call
Tech innovator Peterffy, Colony CEO Wetenhall honored for championing free enterprise
Customer margin loans are at an all-time high, says Interactive Brokers founder Thomas Peterffy
Thomas Peterffy Helped Create Automated Securities Trading. What He Sees Next. - Barron's
Don't Panic, Billionaire Thomas Peterffy Says: Tariffs Present 'Greatest' Buying Opportunity
Interactive Brokers' Thomas Peterffy: Sentiment is less about tariffs, more that stocks were too high
A bitcoin crash is a top threat to the stock market next year, Interactive Brokers chairman says
Interactive Brokers' Thomas Peterffy talks the possibility of betting on U.S. elections
Wall Street Billionaire Thomas Peterffy Discusses His 'Worst Trade' And More: 'It Was A Huge Hit'
Wall Street billionaire Thomas Peterffy reveals his worst trade – and why he's never read investing books
Interactive Brokers’ Thomas Peterffy: Here’s why brokers make more money on options trade
Thomas Peterffy Says He's Worried Inflation in U.S. Could Become an ‘Unstoppable Situation'
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