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#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything

Founders · Oct 5, 2025

From refugee to billionaire, Tomas Peterffy's obsession with automation revolutionized Wall Street and built the $120B Interactive Brokers.

The Movie 'Trading Places' Was Inspired by a Bet with Interactive Brokers' Founder

Film producer Aaron Russo bet Tomas Peterffy $10,000 that filmmaker Melvin Van Peebles couldn't last a year as a trader. Van Peebles succeeded, and Russo, inspired by the experience of a novice thriving in finance, produced the movie "Trading Places" a year later, based on the premise.

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything thumbnail

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything

Founders·4 months ago

Interactive Brokers' IPO Was a Marketing Strategy, Not a Capital Raise

Owning nearly 100% of his cash-flow-positive company, Tomas Peterffy took Interactive Brokers public purely for advertising purposes. He viewed the IPO as a way to get "the company's name in the public domain" and even used a Dutch auction to save $80 million on banking fees.

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything thumbnail

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything

Founders·4 months ago

Tomas Peterffy's 'Alice in Wonderland' View of Wall Street Fueled His Disruption

Peterffy saw Wall Street's manual, intuition-based systems as nonsensical. This outsider's perspective, viewing the industry as an illogical 'Wonderland,' allowed him to identify and exploit massive inefficiencies with technology and math, even when others thought his ideas were crazy.

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything thumbnail

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything

Founders·4 months ago

Peterffy Shut His Market-Making Firm Because It Became Intellectually Uninteresting

Despite building Timber Hill into the world's largest options market maker, Tomas Peterffy shut it down. He pivoted to Interactive Brokers because the market-making game became an uninteresting speed contest, while the challenge of building the best trading platform for others remained compelling.

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything thumbnail

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything

Founders·4 months ago

Interactive Brokers' Founder Built a Robot to Bypass NASDAQ's Manual Entry Rule

When NASDAQ mandated that all trades be entered manually via keyboard, Peterffy didn't argue. Instead, he built a mechanical spider with metal fingers to automatically type orders onto the keyboard, satisfying the letter of the absurd rule while preserving his automated system's efficiency.

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything thumbnail

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything

Founders·4 months ago

Witnessing His Boss's Success Convinced Tomas Peterffy He Could Do Better

Peterffy saw his boss, a psychiatrist with no market background, become a gold trading expert. This observation, combined with his boss's refusal to expand into new areas, gave Peterffy the confidence to leave and start his own firm, believing "if he can figure it out, so can I."

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything thumbnail

#402 Thomas Peterffy: The $80 Billion Founder Who Automates Everything

Founders·4 months ago