Mark Zuckerberg has already made $4 billion in 2018

The new year is off to a great start for America’s billionaires. Major market indices are up 2% year-to-date, continuing the major stock gains of last year.

Among those profiting from the continued stock surge is Facebook CEO Mark Zuckerberg. The 33-year-old has earned $4.16 billion since 2018 began, with company shares climbing more than 5%.

That’s been enough to vault Zuckerberg from 5th to 4th on Bloomberg‘s billionaires list (where he’s been as recently as 2016). He’s now worth nearly $77 billion.