Tesla CEO Elon Musk is the richest person in the US with $251 billion in wealth, according to Forbes. He's followed by Amazon Founder Jeff Bezos ($161 billion), Oracle Co-founder Larry Ellison ($158 billion), Berkshire Hathaway's Warren Buffett ($121 billion), Google Co-founder Larry Page ($114 billion), Bill Gates ($111 billion), Sergey Brin ($110 billion) and Mark Zuckerberg ($106 billion).