Jack Dorsey Chairman after Dick Costolo replaced Williams as the CEO. On June 10, 2015, Costolo announced that he was resigning as CEO of Twitter, effective July 1, 2015. Dorsey would assume the post of Interim CEO upon Costolo's departure. He was named permanent CEO of Twitter on October 5, 2015. On the day after the controversy about Twitter's new algorithms for tweets, Dorsey responded to the trend, saying it was only a hoax. In May 2016, Dorsey announced that Twitter would not count photos and links in the 140-character limit to free up more space for text. This move was an
Jack Dorsey reinvention through design and simple interfaces of what it means to be mayor. Dorsey thinks becoming mayor of New York City is an aspiration that would raise the bar for him. He served as a judge for New York City Mayor Michael Bloomberg's NYC BigApps competition in 2011. Dorsey is an on-record donor to Democratic Party candidates. Dorsey was announced as a new member of the board of directors of The Walt Disney Company on December 24, 2013. The press release referred to Dorsey as a "talented entrepreneur" and explained that his experience is aligned with the corporation's "strategic priorities."