Tech Dick Costolo

  • '#Ring!' is displayed on a mobile device as the company announced its initial public offering and debut on the New York Stock Exchange.

    With Twitter shares up more than 150% since its IPO, the pressure is on for the company to deliver in its first earnings report.

  • Twitter ceo Dick Costolo at the NYSE to launch the Twitter IPO.

    Two outspoken corporate governance experts say Silicon Valley companies need to add more diversity to their board rooms.

  • Twitter co-founder Biz Stone

    Besides the ousted co-founders, there are a number of other key players who are responsible for growing and running the company now.

  • To celebrate Twitter's 7th birthday, we thought we'd share seven facts about the micro-blogging site that most people don't know.