President and CEO
Hewlett-Packard
2011 rank: 9
Age: 56
Whitman was supposed to be HP's savior, but the hoped-for turnaround has yet to materialize: Profits fell 19% in 2011, and the stock is down 19% this year. But HP, with $127 billion in annual sales, gives Whitman huge power. Can she restore the tech company to its former glory?