Richest people on the planet 2015

Published On: Mar 08 2012 09:56:15 AM CST   Updated On: Mar 02 2015 09:37:33 AM CST

A familiar face once again tops Forbes' list of the world's richest billionaires.

Rob Walton
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Donald Bowers/Getty Images

12. S. Robson Walton -- The son of Wal-Mart Stores Inc. founder Sam Walton and chairman of Walmart's net worth is $39.1 billion.

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