Elon Musk has become the first person to cross the trillionaire threshold, at least on paper, after SpaceX priced its blockbuster initial public offering at $135 a share.

 

Before the IPO, Musk was worth an estimated $813 billion, a fortune more than twice as large as the planet's second-richest person, Google co-founder Larry Page, who is worth an estimated $288 billion, according to Forbes.