The world's 10 richest people

The ranks of the world’s billionaires continue to scale new heights – and stretch to new corners of the world. Our global wealth team found 1,645 billionaires with an aggregate net worth of US$6.4 trillion, up from US$5.4 trillion a year ago. We unearthed 268 new ten-figure fortunes, including a record 42 new women billionaires. In total, there are 172 women on the list, more than ever before and up from 138 last year.

Bill Gates is back on top after a four-year hiatus, reclaiming the title of world’s richest person from telecom mogul Carlos Slim Helu of Mexico, who ranked No. 1 for the past four years. Gates, whose fortune rose by US$9 billion in the past year, has held the top spot for 15 of the past 20 years.

Thanks to the tech boom, and strong stock market, the U.S. once again leads the world with 492 billionaires, followed by China with 152 and Russia with 111. But wealth is spreading to new places. We found billionaires for the first time in Algeria, Lithuania, Tanzania and Uganda. Also for the first time, an African, Aliko Dangote of Nigeria, breaks into the top 25. Worth US$25 billion, he moves up 20 spots.

More from Forbes.com:

The complete Forbes Billionaires list

The world's richest women

The world's richest tech billionaires

Related:Gina gets richer, but falls down list

Photo by AP Mar 4, 2014

The world's 10 richest people

Bill Gates reclaims the top spot after a four-year hiatus.

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