C. Douglas McMillon, 42

C. Douglas McMillon, 42

Wal-Mart International
President & CEO

On his first day of work unloading trucks for Wal-Mart Stores (WMT) in 1984, Doug McMillon, then 17, drove his Honda (HMC) Civic into his boss's car. It's lucky for Wal-Mart he wasn’t fired. McMillon has spent much of the last 25 years working his way up to become CEO of Wal-Mart International in January. McMillon is credited with streamlining operations and boosting same-store sales at the company's Sam’s Club unit. Analysts see his promotion as a move to groom him to be CEO of the parent company. With $98.6 billion in sales, Wal-Mart International is the company’s fastest-growing division.

--by Aili McConnon