Musk entered the San Francisco headquarters ahead of the $44 billion deal closing, and was faced with skeptical employees worried for their jobs and the company culture. ..David Faber of CNBC reported Thursday night that Twitter CEO Parag Agrawal and CFO Ned Segal have left Twitter as Elon Musk officially takes over the company. A later report noted that these execs, along with Vijaya Gadde, had been fired by the new owner.