Born On Your Day
Charles Simonyi
NASA, Public domain, via Wikimedia Commons

billionaireentrepreneurinventorscientistTop tier

Charles Simonyi

Entrepreneur · born September 10, 1948

$8.4Bolder estimate, as of 2025 · Forbes

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About

Charles Simonyi is a Hungarian-American software architect, businessman, and space tourist.

Adapted from Wikipedia (CC BY-SA 4.0).

Reported wealth

Each figure is a dated estimate from the publisher shown; wealth changes, and nothing here is live.

As ofEstimateSource
2025$8.4BForbes · current

Sources

Every fact on this page traces to one of these.

Also born on September 10

Charles's most notable birthday twins

Jack Ma
billionaire

Jack Ma

Entrepreneur · Cainiao · logistics

1964 · People's Republic of China

$37.3Bolder estimate, as of 2019 · Forbes

Ma Yun, also known as Jack Ma, is a Chinese businessman and philanthropist. He is the founder of the Jack Ma Foundation, and co-founder of Alibaba Group and Yunfeng Capital. He is one of the richest men in China with a net worth of approx US$27.5 billion.

Foundations World Economic Forum, CC BY 2.0, via Wikimedia Commons

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Sources (3)
Christopher Columbus
inventor

Christopher Columbus

Inventor

1451–1506 · Republic of Genoa

Christopher Columbus was an Italian explorer and navigator from the Republic of Genoa who completed four Spanish transatlantic voyages in the name of the Catholic Monarchs, opening the way for the widespread European exploration and colonization of the Americas.

Ridolfo del Ghirlandaio, Public domain, via Wikimedia Commons

Sources (2)
Guy Ritchie
founder

Guy Ritchie

Founder · Marv Studios · entertainment

1968 · United Kingdom

Guy Stuart Ritchie is an English film director, producer and screenwriter known primarily for British comedy gangster films and large-scale action-adventure films.

Kathy Hutchins, CC BY-SA 4.0, via Wikimedia Commons

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Jack Grealish
athlete

Jack Grealish

Athlete

1995 · United Kingdom

Jack Peter Grealish is an English professional footballer who plays as a left winger or attacking midfielder for Premier League club Everton, on loan from Manchester City.

Hameltion, CC BY-SA 4.0, via Wikimedia Commons

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Arthur Holly Compton
scientist

Arthur Holly Compton

Scientist

1892–1962 · United States

Arthur Holly Compton was an American physicist who shared the 1927 Nobel Prize in Physics with C. T. R. Wilson for his discovery of the Compton effect, which demonstrated the particle nature of electromagnetic radiation.

Unknown (Mondadori Publishers), Public domain, via Wikimedia Commons

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