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  • Age
  • Title
    Founder and CEO, Square; Co-founder and executive chairman, Twitter
  • Company
    Square, Twitter

The consummate multitasker no longer has a day-to-day role at Twitter but he’s been on a tear at Square. The fast-growing payments company has signed on more than 2 million customers, including both Romney and Obama campaigns, which use it to collect donations. In August, Square signed its biggest merchant yet: Starbucks, the king of lattes. Dorsey personally flew to Seattle to seal the deal with Starbucks CEO Howard Schultz, who now sits on Square’s board. As part of the agreement, Starbucks invested $25 million in Square, helping to raise the startup’s estimated valuation to a whopping $3.25 billion. Not bad for a deal that was sealed in the virtual blink of an eye. His dream job: Mayor of New York City. –M. L.