Gates lost his standing this year to Amazon CEO Jeff Bezos, whose net worth is $160 billion, compared with Gates' $97 billion. That makes the Microsoft founder the second richest American.
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The shakeup isn't an overnight surprise. In July 2017, Bezos became the richest person in the world, briefly, when his net worth hit just north of $90 billion. It happened again in October 2017 when his net worth clocked in at $93.8 billion compared with Gates' $88.7 billion. In July 2018, Bloomberg reported that Bezos overtook Gates on its Bloomberg Billionaires Index, which pinned his net worth at $150 billion.
Bezos didn't immediately respond to a request for comment.