Jack Dorsey

Benjamin Wachenje

Title: Chairman and co-creator, Twitter; CEO, Square

Born: November 19, 1976, St. Louis, Missouri

Education: New York University (dropped out)

Early Marker: Created open-source logistics software for taxi dispatch.

Big Idea: Microblogging and messaging in 140 characters; now working on platform for small businesses to accept card payments on a mobile device.

Wave of the Future: M-economy, App-economy, social media

Latest Special Reports

  • Executives reflect on their own “Make or Break” moments, sharing how they have made key decisions, who they turn to for advice and what they would have done differently.

  • Car On Flooded Road In City

    Rising Risks looks at the real estate impact of rising tides and increasingly extreme weather.

  • A look at 50 private companies set to reshape the business landscape.

CNBC25: Rebels, Icons and Leaders