“
Socialism and Communism are extremely attractive to a superficial observer. It is not until you get into the details, or actually experience it, that it becomes apparent that it does not work.
— Thomas Peterffy
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TP
Thomas Peterffy
businessperson
1944
Thomas Peterffy is a Hungarian-born American billionaire businessman. He is the founder, chairman and the largest shareholder of Interactive Brokers. 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. As of October 2025, his estimated net worth is US$82.8 billion, making him the 22nd richest person in the world.