After a three month search, Twitter announced co-founder will take over CEO job. — -- Jack is back! Jack Dorsey, 38, the former CEO of Twitter and one of the founders of the site, is taking over ...

Twitter Inc. co-founder Jack Dorsey is stepping down as chief executive. The San Francisco-based company announced the news Nov. 29. Twitter Chief Technology Officer Parag Agrawal will replace Dorsey, ...

Twitter co-founder Jack Dorsey is axing more than 4,000 employees at his fintech company Block — slashing the workforce by nearly half in what he called a necessary shift toward ‘intelligence tools.’ ...

The Block co-founder called the decision "one of the hardest decisions in the history of our company." ...