About
Jack Dorsey, born in 1976, is an American businessman and technology entrepreneur. He is best known as the co-founder of Twitter (now X) and served as its CEO during two separate periods. He is also the co-founder, principal executive officer, and chairman of Block, Inc. In addition, Dorsey founded Bluesky, further demonstrating his innovative spirit.
Career Timeline
Twitter Founded
Dorsey co-founds Twitter, launching a new era of social media.
Square Founded
Dorsey co-founds Square, revolutionizing mobile payments.
Returns as Twitter CEO
Dorsey returns as Twitter's CEO, steering the company through a period of growth and challenges.
Steps Down as Twitter CEO
Dorsey steps down as Twitter CEO again, focusing on Block and other ventures.
Bluesky Investment
Dorsey invests in Bluesky, showcasing interest in decentralized social media.
Tech Innovator
Dorsey continues to be a leading figure in tech, shaping communication and finance globally.
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Last updated: February 23, 2026