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31. Michael Duke
31. Michael Duke
CEO, Wal-Mart

The chief of the world's largest company has been busy countering stagnant sales at his U.S. stores by refilling their shelves with products that were dropped in a marketing and merchandising overhaul. Outside the U.S., where a quarter of Wal-Mart's $408 billion in sales are generated, Duke recently agreed to buy control of South African retailer Massmart for $4.6 billion, a deal that will add nearly 300 new outlets to the company's 4,100-plus international store portfolio.


NEXT: 32. Michael White
Last updated November 19 2010: 10:47 AM ET
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