CEO: Patricia Woertz
Company value: $28 billion
Patricia Woertz has been CEO and president of Archer Daniels Midland since 2006. A year later, she also became chairman of the board of ADM, the processor and producer of food ingredients, feed ingredients and biofuels. Woertz also serves on the boards of Procter & Gamble, the U.S. China Business Council and the President's Export Council.