15. Alice Walton, 68, Walmart, $46 B , 14. S. Robson Walton, 73, Walmart, $46.2 B, 13. Jim Walton, 70, Walmart, $46.4 B Jim Walton, left,, Alice Walton, center, and Robson Walton, right, greet each other during the beginning of the Walmart Stores Inc. shareholders' meeting in Fayetteville, Ark., Friday, June 1, 2012. The three siblings are the children of the late Sam Walton, founder of Walmart. (AP Photo/April L. Brown)
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