Executive Director, Gas and Power, Shell Trading, Global Solutions, and Technology
Royal Dutch Shell
Country: Netherlands Royal Dutch Shell
2007 rank: 5
Cook, 50, just might make history. Already the highest-ranking woman at the world's second-largest energy company, she is a favorite to take over as CEO next year. That would make Shell the first oil major to have a woman chief executive and the largest company in the world in any industry to be led by one.
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Last updated September 29 2008: 1:21 PM ET