Dick Costolo, who joined Twitter in 2009, is stepping down as its CEO at month’s end. The 140-character company said today that Jack Dorsey, its chairman and co-founder, will take over as interim chief executive July 1 as Twitter looks for a permanent CEO. Meanwhile, Costolo will remain on Twitter’s board. The company’s shares jumped 8% in after-hours trading today.
Subscribe to Deadline Breaking News Alerts and keep your inbox happy.