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No. 5: Blair Parry-Okeden
Estimated net worth: $11.4 billion (as of January 2017)
Parry-Okeden's grandfather founded the media/automotive conglomerate Cox Enterprises. She prefers to stay out of the limelight and, although born in America, lives quietly in Australia.
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No. 4: Abigail Johnson
Estimated net worth: $14 billion (as of January 2017)
Johnson is the third-generation CEO running mutual fund giant Fidelity, founded in 1946 by her grandfather, Edward Johnson II.
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No. 3: Laurene Powell Jobs
Estimated net worth: $19.8 billion (as of January 2017)
Powell Jobs is the widow of Apple co-founder Steve Jobs. She has founded organizations to assist in the advancement of disadvantaged students.
No. 2: Jacqueline Mars
Estimated net worth: $28.2 billion (as of January 2017)
Mars inherited her fortune from grandfather Frank Mars and father Forrest Mars Sr., founders of the largest candy maker in the world, Mars Inc.
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No. 1: Alice Walton
Estimated net worth: $33.2 billion (as of January 2017)
Walton's father, Sam Walton, founded retail giant Wal-Mart. She takes no active role in the business but instead concentrates on collecting and curating art.