Since becoming the richest man in modern history earlier this year, Amazon CEO Jeff Bezos has taken the No. 1 spot on Forbes' list of the 400 richest Americans— a shift that bumped Microsoft cofounder Bill Gates to second place.
Bezos' net worth jumped from $81.5 billion on last year's list to this year's $160 billion. He's the first person to surpass a net worth of $150 billion since Forbes began tracking the richest Americans over 30 years ago, and the first person to bump Gates out of the No.