CEO, PepsiCo (PEP)
Age: 51
When PepsiCo tapped Nooyi as CEO last year, the $35 billion snack and beverage giant became the biggest U.S. company run by a woman -- and a foreign-born one at that. Nooyi, a 13-year Pepsi veteran and its former CFO, helped forge the $14 billion acquisition of Quaker Oats and its Gatorade unit in 2001 and positioned Pepsi for rapid growth in China, the Middle East, and her native India. Age: 51
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