From cnbc.com

Elon Musk will join Twitter’s board of directors after taking a 9.2% stake in the social media company, according to a release filed with the SEC. Shares were up more than 5% in premarket trading. “Through conversations with Elon in recent weeks, it became clear to us that he would bring great value to our Board,” CEO Parag Agrawal said in a tweet. “He’s both a passionate believer and intense critic of the service which is exactly what we need on Twitter, and in the boardroom, to make us stronger in the long-term,” he added. Musk will serve as a Class II director on the board, with his term expiring in ... (full story)