12. Irene Rosenfeld
« 11. Andrew Mason13. Toni Preckwinkle » AGE: 58 OCCUPATION: Chairman and CEO, Kraft Last year Fortune named this mac-and-cheese lover the single most powerful woman in American business. But Rosenfeld’s August decision to split Kraft into two companies—a $32 billion global snacks maker that she’ll helm and a slower-growing $16 billion North American grocery … Read more
