10| Abigail Johnson, president and chief executive officer of American investment firm Fidelity Investments (FMR) | Net worth: $21.2 billion. Credit: Wikipedia
9| Chilean mining magnate Iris Fontbona and her family | Net worth: $22.8 billion. Credit: Instagram/iris_fontbona
8| German billionaire heiress, the daughter of Herbert and Johanna Quandt, Susanne Klatten | Net worth: $24.3 billion. Credit: Twitter/@UniOfBuckingham
7| Miriam Adelson, owner of casino company Las Vegas Sands | Net worth: $27.5 billion. Credit: AP Photo
6| Owner of Benga Mining, Gina Rinehart | Net worth: $30.2 billion. Credit: Ginarinehart.com/au
5| Candy heiress Jacqueline Mars | Net worth: $31.7 billion. Credit: Twitter/@DanAlexander21
4| MacKenzie Scott, the ex-wife of Amazon founder Jeff Bezos | Net worth: $43.6 billion. Credit: AFP Photo
3| President of the David H Koch Foundation, Julia Flesher Koch | Net worth: $60 billion. Credit: David H Koch Foundation
2| Alice Walton, only daughter of Walmart founder Sam Walton | Net worth: $65.3 billion. Credit: Twitter/@SteveCase
1| Francoise Bettencourt-Meyers, the granddaughter of Eugene Schueller, the founder of cosmetics maker L'Oreal | Net worth: $74.8 billion. Credit: Twitter/@BriHallOfficial