Meet the billionaires under 30
8. Gustav Magnar Witzvoe
7. John Collison
John Collison is president and cofounder of Stripe, an online payments company valued at over $20 billion. He and his brother Patrick, now 30, had the idea for Stripe while studying at Harvard.
Net worth: $2.1 billion
Age: 28
Citizenship: Ireland
Industry: Technology
Source of wealth: Self made, Stripe
Source: Forbes
6. Evan Spiegel
As chief executive of Snap, the company behind disappearing-message app Snapchat, Spiegel is one of the youngest CEOs of a public company. Spiegel cofounded the business while enrolled at Stanford in 2011, and still owns about 18% of its shares.
Net worth: $2.1 billion
Age: 28
Citizenship: United States
Industry: Technology
Source of wealth: Self made, Snap Inc.
Source: Forbes
5. Alexandra Andresen
Alexandra Andresen inherited 42% of Ferd, an investment company run by her father Johan. Ferd runs hedge funds and invests in Nordic-listed stocks and private equity.
Net worth: $1.4 billion
Age: 22
Citizenship: Norway
Industry: Finance
Source of wealth: Inherited
Source: Forbes
4. Katharina Andresen
Katharina Andresen, Alexandra’s sister, inherited another 42% of Ferd. Thanks to a dual-class share structure, her father still controls 70% of the voting shares.
Net worth: $1.4 billion
Age: 23
Citizenship: Norway
Industry: Finance
Source of wealth: Inherited
Source: Forbes
3. Ludwig Theodor Braun
Ludwig Theodor Braun owns 10% of B. Braun Melsungen, a medical-device company that started out as a small pharmacy selling herbal remedies. His father, Ludwig Georg Braun, grew the company from $24 million in annual sales in 1977 to around $8 billion today.
Net worth: $1 billion
Age: 29
Citizenship: Germany
Industry: Healthcare
Source of wealth: Inherited
Source: Forbes
2. Kylie Jenner
Kylie Jenner, a member of the Kardashian-Jenner family, is the youngest billionaire in history. (Forbes qualifies her as self made despite her family's already considerable wealth.) She owns 100% of her company, Kylie Cosmetics, which was most recently valued at $900 million.
Net worth: $1 billion
Age: 21
Citizenship: United States
Industry: Consumer Goods
Source of wealth: Self made, Kylie Cosmetics
Source: Forbes
1. Anna Kasprzak
Anna Kasprzak co-owns Danish shoe company ECCO with her brother André and mother Hanni. ECCO products are sold in 90 countries, generating close to $1.5 billion in yearly sales. As a dressage rider, Kasprzak placed 14th in the 2016 Olympics in Rio de Janeiro.
Net worth: $1 billion
Age: 29
Citizenship: Denmark
Industry: Consumer Goods
Source of wealth: Inherited
Source: Forbes
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