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7. TJX

CEO: Carol Meyrowitz
Company value: $44.1 billion

Carol Meyrowitz joined TJX in 1983, and became president in 2005. She joined its board of directors the following year. TJX operates more than 2,900 discount retail stores, including TJ Maxx, Marshalls and Home Goods.

David McGew | Getty ImagesInset: Essdras M Suarez | The Boston Globe | Getty Images