Williams, the founder and CEO of online publishing platform Medium and co-founder and partner at Obvious Ventures, served as Twitter's chief executive from 2008 to 2010 following Jack Dorsey's, Twitter's current CEO, original stint as CEO. Williams was succeeded by Dick Costolo, who after a five-year stint at the helm relinquished the throne back to Dorsey.
Twitter is an American online news and social networking service on which users post and interacts with messages known as "tweets".
Tweets were originally restricted to 140 characters, but on November 7, 2017, this limit was doubled for all languages except Chinese, Japanese, and Korean. Registered users can post, like, and retweet tweets, but unregistered users can only read them.
Users access Twitter through its website interface, through Short Message Service (SMS) or its mobile-device application software "app". Twitter, Inc. is based in San Francisco, California, and has more than 25 offices around the world.
Twitter co-founder Evan Williams will leave the social media company's board of director at the end of the month.
Twitter's board of directors includes Bret Taylor, president, and chief product officer at Salesforce; Debra Lee, president, and CEO of BET Networks; and executive chairman Omid Kordestani.
Twitter's stock closed up 3 percent Friday, trading at nearly $32 a piece for a market cap of the north of $24 billion.
Twitter announced his departure in a security filing Friday and in a series of tweets, Williams addressed the news.
"I'm very lucky to have served on the @Twitter board for 12 years (ever since there was a board)," he wrote. "It's been overwhelmingly interesting, educational – and, at times, challenging. Thank you, @jack and @biz for starting this crazy company with me – and continuing to make it better and better. And to my fellow board members, new and old – some of the most thoughtful people I've ever known."
