7 of 50
7. Ellen Kullman
7. Ellen Kullman
DuPont (DD)
2008 rank: 15
Age: 53

Twenty-one years after starting out in the X-ray-film division, Kullman took the top job in January. She's reshuffling execs and aiming to trim $1 billion in costs this year.

NEXT: 8. Carol Bartz
Last updated September 15 2009: 12:58 PM ET
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