Nikola Tesla

The Tesla and SpaceX entrepreneur was pushed into the top slot after Tesla's share price increased on Thursday.
He takes the top spot from Amazon founder Jeff Bezos, who had held it since 2017.

Tesla CEO Elon Musk wrote in a tweet that "during the darkest days of the Model 3, I approached Tim Cook to discuss with him possibility of Apple acquiring Tesla - for one-tenth of our current value. He refused to attend the meeting".