The richest self-made woman in America invested her life savings in a pizza store in Michigan in 1954. Her name is Marian Ilitch, and the restaurant that she and her husband Mike opened turned into the Little Caesars pizza chain—which now generates over $3 billion in sales annually.
The other wealthy women who made the cut earned their fortunes in a variety of fields, including tech, retail, entertainment, fast food, and fashion. (Women such as Walmart heir Alice Walton and Steve Jobs’ widow Laurene Powell Jobs, are actually richer, but they’re not included on the list because their wealth was inherited.)
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There are now 18 self-made American women who are billionaires, up from 16 last year. The top 10 are all worth $2 billion or more, with Ilitch in the top spot. Diane Hendricks ($4.9 billion), the cofounder and chair of the wholesale building supplies distributor ABC Supply, is second on the list, followed by a tie for third place between gas station and convenience store chain founder Judy Love and entertainment mogul Oprah Winfrey—both at$2.9 billion.
This article originally appeared in Time.com