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Dick Costolo, who was named CEO in October 2010, presided over the company’s public-market debut in November 2013 and the stock’s decline of more than 50 percent after peaking near the end of that year. Photo: Bloomberg<br />

Dick Costolo resigns as Twitter CEO

2 min read . 12 Jun 2015
Prime Minister Narendra Modi with Twitter CEO Dick Costolo in a meeting in New Delhi on Tuesday. Photo: PTI<br /><br />
Photo: Hemant Mishra/Mint<br />

Republic of trolls

1 min read . 08 Feb 2015
The user- profile changes include a huge cover photo, and showing the most retweeted tweet.<br />

Twitter toes the line

5 min read . 15 Apr 2014
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