Jack Patrick Dorsey is an American Internet entrepreneur, philanthropist, and programmer, who is a co-founder and former CEO of Twitter, Inc. from 2015 until 2021, as well as co-founder, principal executive officer and chairperson of Block, Inc., which is the developer of the Square financial services platform. As of October 2023, Forbes estimated his net worth to be $3.1 billion.
Dorsey in 2014
Dorsey in 2008
Dorsey and President Barack Obama at Twitter Town Hall in July 2011
President Donald Trump with Dorsey in the Oval Office of the White House on April 23, 2019
Twitter, Inc. was an American social media company based in San Francisco, California, which operated and was named for its flagship social media network prior to its rebrand as X. In addition to Twitter, the company previously operated the Vine short video app and Periscope livestreaming service. In April 2023, Twitter merged with X Holdings and ceased to be an independent company, becoming a part of X Corp.
Market Square (colloquially the Twitter Building), the company's headquarters in San Francisco, January 2023
A sketch, c. 2006, by Jack Dorsey, envisioning an SMS-based social network
Jack Dorsey, co-founder and then CEO of Twitter, in 2009
