Billionaire Profile
Thomas Peterffy
Global Rank
#21

Image: danor shtruzman | Public domain | via Wikimedia Commons

Thomas Peterffy

CEO, Discount brokerage
UNITED STATES
Real-Time Net Worth
$93.847B
Estimated based on Discount brokerage stock value as of April 20, 2026
-0.53% (24h)
Age
81
Source
Discount brokerage
Industry
Finance & Investments
Citizenship
UNITED STATES

Biography

Thomas Peterffy is a Hungarian-born American billionaire businessman and the founder, chairman, and largest shareholder of Interactive Brokers. Born in Budapest, Hungary, in 1944, Peterffy immigrated to the United States in 1965. He is a pioneer of digital trading and developed the first electronic trading platform for securities. With an estimated net worth of $83.4 billion, Peterffy is a significant figure in the finance industry, leveraging his wealth source from the discount brokerage Interactive Brokers to become one of the wealthiest individuals globally. His career includes founding Interactive Brokers in 1993, and he served as CEO until 2019. Peterffy's achievements have transformed the financial landscape, making him a recognized leader in financial innovation.

Fact Checked
Verified by Editorial Team
Live Data
Updated 4/20/2026

Wealth Over Time

In-Depth Profile

Early Life

Thomas Peterffy was born in Budapest, Hungary, on September 30, 1944, during a Russian air raid. After the failure of the Hungarian Revolution in 1956, his father emigrated to the United States. Peterffy followed suit in 1965, arriving in New York City with no English skills or money. He had a single suitcase containing a change of clothes and a surveying handbook.

Rise to Success

Peterffy started his career as an architectural draftsman and later learned computer programming. He then worked at a Wall Street consulting firm, building trading models. In 1977, he purchased a seat on the American Stock Exchange, and he became a market maker. He developed the first electronic trading platform for securities. He founded Interactive Brokers in 1993, which expanded to serve over 2.4 million customer accounts, including hedge funds and trading shops.

Key Business Strategies

Peterffy revolutionized financial trading through technology. He introduced handheld computers to the trading floor. Peterffy's company, Interactive Brokers, focuses on providing trading platforms and services to sophisticated investors, offering direct market access and competitive pricing. The company has consistently been at the forefront of trading innovation.

Philanthropy

Peterffy is involved in philanthropy, with his giving focused on education, particularly in finance and engineering, and environmental conservation. Through the Peterffy Foundation, he supports institutions like the University of Connecticut. He also contributes to land preservation efforts in Florida.

Career Milestones

1965

Immigrated to the U.S.

Emigrated to the United States from Hungary.

1977

Purchased AMEX Seat

Purchased a seat on the American Stock Exchange and became a market maker.

1983

Pioneered Handheld Computers

Developed the first handheld computers for trading.

1993

Founded Interactive Brokers

Founded Interactive Brokers, an online discount brokerage firm.

2019

Stepped Down as CEO

Stepped down as CEO of Interactive Brokers.

Philanthropy & Social Impact

Education and Conservation

Peterffy Foundation

Unknown

Supports education and environmental conservation.

Business Philosophy & Leadership

Notable Quotes

"If you're willing to study hard and work hard, the world is your oyster."

Leadership Principles

Automation

Consistently pushed for automation to improve efficiency in financial processes.

Innovation

At the forefront of trading innovation with the invention of the first handheld computer in 1983.