Twitter considers exit of Dick Costolo in board reshuffle – report
Report says push to diversify boardroom means Costolo, who stood down in July as chief executive officer, could be among those on the way out
July 2015
Dick Costolo: why tech firms are set to face complex ethical issues
Dick Costolo, Twitter CEO
After nearly five years the Twitter CEO is standing down. He explains why it wants to champion the underserved and make the world’s smallest voices heard
June 2015
Next Twitter boss faces complex challenges, says departing Dick Costolo
In interview before his last day in job, chief executive says going public accelerated short-term-thinking, and regulation would pose threat to free speech
Twitter could be so much more than just a Facebook rival
As chief Dick Costolo departs, investors must stop pushing Twitter to be the next big social media network and focus on its simple strengths
Dick Costolo: Twitter unfollows the leader as social milestones are missed
Slowing growth in user numbers and failure to capture a bigger slice of digital advertising revenue drove the departure of the chief executive
April 2015
Twitter boss confirms plans to expand curated 'experiences' to all users
Users should not panic about a Facebook-style filtered timeline just yet, but Dick Costolo says curation will happen for ‘logged in users’ as well as passing visitors
December 2014
MediaGuardian 100: corporate giants dominate a more vulnerable digital landscape
MediaGuardian 100
October 2014
Twitter changes: 20 hits and misses from the social network's history
From hyperlinked hashtags, promoted tweets and official apps to #NewTwitter and #DickBar. By Stuart Dredge
August 2014
Media blog
We can’t let tech giants, like Facebook and Twitter, control our news values
Emily Bell: Accountability must become part of Silicon Valley’s culture and we can’t leave editorial processes down to algorithms
July 2014
Twitter's growth problem in focus as Wall Street watches closely
Can the social network convince investors that the future's bright – or is the 'Twitter quitter' becoming a real headache?
March 2014
Twitter could ditch @ replies and hashtags
Replies and hashtags called ‘arcane’ by Twitter’s head of news as one trial at the social network bans them completely. By Samuel Gibbs
November 2013
Twitter takes on Storify with Custom Timelines
Social network allows users to curate tweets, stepping on toes of partner previously cited as 'good example' of how to use data. By Alex Hern.
October 2013
Twitter boss Dick Costolo was briefly fired in 2010
Twitter's founding investor expected to net more than $1bn from flotation
Twitter IPO: what it tells us about the future of the network
Who are the Twitter millionaires?
September 2013
MediaGuardian 100 2013 1-100
4. Dick Costolo
Job: chief executive, Twitter Age: 49 Industry: digital media 2012 ranking: 2
September 2012
US news blog
Twitter chief says company will fight against releasing private content
