SAN FRANCISCO – Amazon stock closed up $4.19 Tuesday, making CEO Jeff Bezos the fourth richest person in the world.

Bloomberg’s Billionaires Index put Bezos’ fortune at $58.2 billion Tuesday.

Bezos overtook Carlos Slim, Mexico’s telecommunications baron, who had been in fourth place.

Amazon’s stock has risen 113% this year, earning Bezos $29.6 billion since January 1, according to the Bloomberg Index, which ranks the world’s 400 richest people.

Bezos became the third richest American last month after a profitable quarter buoyed Amazon’s stock.

At the beginning of the year he was just thirteenth on the list of wealthiest Americans, according to Bloomberg.

The Seattle area is now home to number one and three on the list. Microsoft founder Bill Gates is still the world’s richest person, worth $85 billion, according to the Index.

Second on the list is Amancio Ortega of Spain, the founder of clothing retailer Inditex SA. Third is U.S. investor Warren Buffett.

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