Optimus is still under development, but the bot has become a familiar sight at company events and for many employees. Inside Tesla’s Palo Alto, Calif., engineering headquarters, robots routinely circle the inside perimeter of offices gathering information on how to navigate a room alongside humans.

The Tesla CEO’s fortune surged this year, eclipsing numerous milestones as Musk became wealthier than some of the world’s largest economies.

Elon Musk had earlier celebrated the capture of Venezuelan President Nicolas Maduro in a US military operation sanctioned by President Donald Trump, saying that Venezuela would finally prosper with Maduro gone.

The decision brings to a close a years-long court battle that irked Musk so much he moved Tesla's incorporation from Delaware to Texas.

Tesla Inc. ended last year on a roll, with investors increasingly buying into Elon Musk’s ebullience about autonomous vehicles. Winning over actual car buyers was another story.

The billionaire gifted Tesla shares worth nearly $100 million to charities in connection with "year-end tax planning," according to an SEC filing.

Elon Musk has again declared energy “the true currency,” fueling speculation among bitcoin supporters that he’s quietly backing

Tesla’s sleek cars and futuristic trucks have defined Elon Musk's public image, but SpaceX is the real engine behind his growing net worth.