Jack Dorsey
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.