Biz Stone Leaves Twitter He'll re-create the 'Obvious Corporation' with Evan Williams By Kevin Spak, Newser Staff Posted Jun 29, 2011 10:21 AM CDT 0 comments Comments Biz Stone, co-founder and creative director of Twitter, talks about his company during an interview at Twitter headquarters in San Francisco on March 11, 2011 in California. (Getty Images) (Newser) – Twitter co-founder Isaac “Biz” Stone is sort-of quitting to go pursue new business ideas with fellow co-founder Evan Williams. In a blog post, Stone says that he’ll “continue to work with the company for many years to come,” but that since the current leadership team is so competent, “I’ve decided that the most effective use of my time is to get out of the way until I’m called upon to be of some specific use.” Instead, Stone, Williams, and longtime friend Jason Goldman will be re-launching “The Obvious Corporation”—the now-defunct company that Twitter grew out of. The original Obvious Corporation was created by Williams to buy back his failed start-up and to generate new business ideas. Williams left Twitter last fall, the AP notes, as new CEO Dick Costolo took over. Twitter’s third co-founder, Jack Dorsey, recently returned as executive chairman and head of product development.