Meet Twitter's billionaires

With Twitter surging on its first day of trading, there are lots of people who are suddenly #filthyrich.

Dick Costolo - $346 million

twitter founders dick costolo

Current Twitter CEO Dick Costolo is credited with helping the company grow from its rocky adolescence into a company ready for a public market. Costolo joined the company in 2009 as COO after his media distribution venture Feedburner, was acquired by Google (GOOG). In 2010, Costolo became the company's new chief executive.

He's Twitter's fourth largest individual investor with a 1.6% stake. That is worth nearly $350 million at the opening price.

Costolo, who has a background in improv and teaches management classes at Twitter, helped the company turn tweets into profits by making mobile advertising integral to the company's money-making process. The company recently acquired mobile-focused ad exchange MoPub for a reported $300 million.

  @CNNTech - Last updated January 07 2014 03:28 PM ET

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