These are the youngest female billionaires in the world. They range in age from 19 to over 50. Some of them made their fortune on their own, and others inherited the family business. Read on to learn just how these remarkable young women got their billions.

Elizabeth Holmes

Elizabeth Holmes is a 31-year-old who is worth $4.6 billion. She dropped out of Stanford to start a blood testing company called Theranos. She used the money for her education to fund the company. While recently having run into some problems, at one point her company was worth an estimated $9 billion and she has a 50% stake. Theranos uses a painless prick to get a patient’s blood, at less cost than commercial labs.

Yang Huiyan

Yang Huiyan

Yang Huiyan is a 33-year-old who is worth $4.7 billion. Her father founded a company called Country Garden Holdings, which he transferred to her. She also has a hand in the Australian real estate developing business. The company also sold shares, raising $410 million. She has a bachelor’s degree in marketing and logistics from Ohio State University.

Marie Besnier Beauvalot

Marie Besnier Beauvalot is a 34-year-old who is worth $2.5 billion. She inherited a French dairy company called Lactalis. She and her two siblings own 100% of the company. They make Président brie cheese, which is what made the company popular.

Serra Sabanci

Serra Sabanci

Serra Sabanci is a 39-year-old worth $1.1 billion. She is a shareholder and board member of Sabanci Holdings, which is Turkey’s largest financial and industrial conglomerate. She is the 28th richest person in Turkey. She went to the University of Portsmouth and graduated with honors from the Department of Economics of Istanbul Bilgi University.

Ana Lucia de Mattos Barretto Villela

Ana Lucia de Mattos Barretto Villela

Ana is a 41-year-old who is worth $3.6 billion. Her great-grandfather founded Itau, which is one of the largest banks in Brazil. The bank merged with Unibanco and together they are known as Itau-Unibanco, the largest non-state bank in Latin America. She is the youngest female billionaire in Brazil.

Lee Seo-Hyun

Lee Seo-Hyun

Lee Seo-Hyun is a 41-year-old who is worth $1.3 billion. She is the president of Cheil Industries, which is a textile manufacturer. Seo-Hyun expanded the company into fashion business and chemicals. She then bought Colombo Via Della Spiga. She also merged with Samsung SDI and Samsung Everland, making them the leading producer of energy storage solutions.

Aerin Lauder

Aerin Lauder

Aerin Lauder is 46 years old and is worth $1.85 billion. She is an heiress to the Estée Lauder line. She also has her own fashion, perfume, cosmetic, and furniture line named AERIN. When it comes to the Estée Lauder Company, she owns 16 million shares.

Tamara Ecclestone

Tamara Ecclestone

Tamara Ecclestone is 32 years old and worth $3.6 billion. Her father is Bernie Ecclestone, a billionaire who is the chief executive of the Formula One Group. She worked as a presenter for Sky Sports Italia and has been involved in other racing productions.

Holly Branson

Holly Branson

Holly Branson is worth $3.8 billion. Her father is entrepreneur Sir Richard Branson. She went to medical school where she specialized in neurology. After school, she worked in the neurology department of the Chelsea and Westminster Hospital. She also travels around the world doing humanitarian work.

Dylan Lauren

Dylan Lauren

Dylan Lauren, daughter of designer Ralph Lauren, is worth $4.7 billion. She opened the largest candy shop in the world, called Dylan’s Candy Bar. While she chose not to follow in her father’s footsteps, she did let him design her wedding dress when she married Paul Arrouet in 2011.