Twitter Co-Founder Biz Stone to Leave Day-to-Day Role

NEW YORK - Twitter co-founder Biz Stone is leaving his day-to-day role at the company, the Wall Street Journal reported.
Stone's departure from day-to-day work comes after other executive changes at Twitter.

Co-founder Jack Dorsey, who was replaced as CEO two years ago, returned to the company earlier this year as product chief. Late last year, the third co-founder, Ev Williams, stepped down as CEO, with Dick Costolo taking over.

Stone, who helped launch the microblogging service in 2006, will remain involved with Twitter, but he will spend most of his time on relaunching Obvious Corp., the start-up that developed Twitter, with Williams and another collaborator.