Twitter CEO Dick Costolo to Be Replaced by Jack Dorseyhttp://thenextweb.com/insider/2015/06/11/twitter-ceo-dick-costolo-is-stepping-down-will-be-replaced-by-cofounder-jack-dorsey-on-july-1/ by akshayagarwal • 11 years ago 4 0 11 years agoTHthenextweb.com