Most recent
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4 Oct 2013:
Evan Williams will not be the biggest winner, private equity boss Suhail Rizvi is believed to hold 15% stake worth at least $1.9bn
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4 Oct 2013: The company's S-1 form, filed with the SEC this week, reveals its hopes and fears for the future. By Alex Hern
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1 Sep 2013:
Job: chief executive, Twitter
Age: 49
Industry: digital media
2012 ranking: 2 -
21 Sep 2012:
Dick Costolo says site was 'put between a rock and a hard place' when judge ordered release of Occupy activist's tweets
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20 Sep 2011:
Plus Twitter trends explained (sub-140 characters) by Dick Costolo, and Nokia World rumours aplenty
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21 Jul 2011:
As the company lines up a reported $800m investment, Chief executive Dick Costolo hints at more ways for the social network to make money. By Jemima Kiss
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14 Apr 2010:
With Twitter's big announcement of how it plans to make money with Promoted Tweets out of the way, the micro-blogging service's chief operating officer Dick Costolo took the stage at the Ad Age Digital Conference to sell the idea. By David Kaplan
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4 Nov 2006: Do you know what an RSS feed is? Well, Dick Costolo thinks you're going to be using them every day soon. By Leo Benedictus.