![Lynn Elsenhans](https://i2.cdn.turner.com/money/galleries/2010/fortune/1009/gallery.most_powerful_women.fortune/images/lynn_elsenhans.jpg)
Age: 54
Excess supply and soft demand led Sunoco to report a loss. But Elsenhans gained another CEO title this year when she was tapped to head publicly traded Sunoco Logistics Partners, a pipeline operator with $5.4 billion revenue.
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Last updated September 30 2010: 2:47 PM ET