# Thomas Peterffy

_American businessman_

Canonical: https://diginpl.com/people/thomas-peterffy
Last updated: 2026-10-31

> 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$109 billion, making him the 18th richest person in the world.

## Quick facts

- **Born:** 30 September 1944 ([Wikidata](https://www.wikidata.org/wiki/Q7793127#P569))
- **Place of birth:** Budapest ([Wikidata](https://www.wikidata.org/wiki/Q7793127#P19))
- **Citizenship:** United States ([Wikidata](https://www.wikidata.org/wiki/Q7793127#P27))
- **Occupation:** businessperson ([Wikidata](https://www.wikidata.org/wiki/Q7793127#P106))

## About

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.

## Questions

**When was Thomas Peterffy born?**  
Thomas Peterffy was born on 30 September 1944 in Budapest.

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## Sources

- [Wikipedia (English): Thomas Peterffy](https://en.wikipedia.org/wiki/Thomas_Peterffy) — [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)
- [Wikidata item Q7793127](https://www.wikidata.org/wiki/Q7793127) — [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/)
- [Image: Thomas Peterffy Painting Portrait By Artist Danor Shtruzman - Art Drawings (100 Richest By Forbes 2017 List).jpg by danor shtruzman (Public domain)](https://commons.wikimedia.org/wiki/File:Thomas_Peterffy_Painting_Portrait_By_Artist_Danor_Shtruzman_-_Art_Drawings_(100_Richest_By_Forbes_2017_List).jpg)

## Licence and attribution

Text from the Wikipedia article Thomas Peterffy, licensed under CC BY-SA 4.0. This page's text is shared under the same licence. Facts from Wikidata (CC0). Image: Thomas Peterffy Painting Portrait By Artist Danor Shtruzman - Art Drawings (100 Richest By Forbes 2017 List).jpg — danor shtruzman, Public domain.

## Cite this page

"Thomas Peterffy". DigiNepal. Last updated 31 October 2026. https://diginpl.com/people/thomas-peterffy. Retrieved 14 November 2026.