In this article

Musk would have been appointed to Twitter's board on Saturday, but the world's richest man informed the company on the day that he would not, in fact, be taking the board seat.

Check out the companies making headlines in midday trading.

Twitter The social media company soared 27.1% after a filing revealed that Elon Musk has taken a 9.2% passive stake in the firm worth about $2.9 billion. The purchase came weeks after the Tesla CEO polled his 80-plus million Twitter followers about whether the platform adheres to free speech principles. Musk also recently hinted at starting his own site. The move is sparking speculation among analysts that Musk could take a more active ownership in Twitter or even consider a takeover down the road.

In this article