Origins & Early Life

Jack Patrick Dorsey (born November 19, 1976) is an American tech entrepreneur and businessman who co-founded Twitter, Inc., which operated social media service Twitter; financial technology company Block, Inc., which owns and operates Square, Cash App, Afterpay, Bitkey, and Tidal; and microblogging social networking service Bluesky. As of February 2026, Forbes estimated his net worth to be $5.9 billion. Dorsey was born and raised in St. Louis, Missouri.

Pivotal Works & Achievements

His father is Timothy G. Dorsey and his mother is Marcia A. Dorsey (née Smith). Jack Dorsey is partly of Italian descent on his mother's side. His father worked for a company that developed mass spectrometers and his mother was a homemaker.

Enduring Legacy & Impact

He was raised Catholic. Dorsey attended Bishop DuBourg High School. In his younger days, he worked occasionally as a fashion model. By age 14, he had become interested in dispatch routing. Dorsey enrolled at the University of Missouri–Rolla in 1995 and attended for two-plus years before transferring to New York University in 1997, but he dropped out two years later, one semester short of graduating. He came up with the idea that eventually became Twitter while studying at New York...

Contemporary Figures & Related Historical Timelines

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• Alan J. Pakula — Shared historical date (11-19 · Died) (1998): American film director, writer, and producer known for political thrillers.
• Alexander I of Russia — Shared historical date (11-19 · Died) (1825): Emperor of Russia during the Napoleonic era, known for liberal reforms and military campaigns.
• Ali Larter — Historical peer (Born in 1976) (1976): American actress known for roles in sci-fi, horror, and romantic comedies.
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• Biruté Galdikas — Historical peer (Died in 2026) (2026): Pioneering primatologist and conservationist, renowned for her work with orangutans.
• Bob Pettit — Historical peer (Died in 2026) (2026): NBA star and coach, known for his dominance with the Milwaukee/St. Louis Hawks.
• Adolfo Pedernera — Historical peer (Died in 1995) (1995): Argentine football legend, nicknamed 'El Maestro,' pivotal in the 1940s.
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