Stone, who co-founded the microblogging platform with Jack Dorsey and Williams in 2006, made the announcement via his blog last night.
He wrote: “My work on Twitter has spanned more than half a decade and I will continue to work with the company for many years to come. During this time—especially lately, it has come to my attention that the Twitter crew and its leadership team have grown incredibly productive. 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.”
Stone’s departure is the latest in several management shake-ups at the microblogging company, which has a valuation of $7.7bn and celebrated its fifth birthday earlier this year.
In March Dorsey returned to Twitter in a full time position leading the site’s product development, having been a part time chairman for several years. He directly replaced Williams, who had alreadystood down last year from the chief executive role to make room for the current chief Dick Costolo.
From March onwards Williams has had no daily involvement with Twitter as a business, but remains on the company’s board.
