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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

  • Snapchat

    Full coverage on Snapchat's IPO, including in-depth roadshow coverage, expert analysis, and opening stock prices.

  • Watch investments

    Covering the full set of tools and strategies for long-term investors: How to take everyday market fluctuations in stride, and when to know it’s time to take action or protect against a major economic shifts.

  • Trillions of dollars are invested in exchange-traded funds, and there's a place for them in every investor's portfolio.

CNBC25: Rebels, Icons and Leaders