1. Leonardo Maria Del Vecchio ($6.6B) – Italy, 29 years old Unlike his half-brothers, Leonardo works in the family business! He is Chief Strategy Officer at EssilorLuxottica and President of Ray-Ban. Each of his half-siblings and his mother inherited equal 12.5% stakes in Delfin.

•  Luca Del Vecchio ($6.6B) – Italy, 23 years old Clemente’s brother also inherited 12.5% of Delfin after their father’s death in 2022. Beyond EssilorLuxottica, Delfin owns stakes in Italian bank UniCredit and insurer Generali. He has no operational role in the family businesses.

• Clemente Del Vecchio ($6.6B) – Italy, 20 years old The youngest of three Del Vecchio siblings on this list, he owns 12.5% of family holding company Delfin. Delfin owns a significant stake in EssilorLuxottica, the eyewear giant behind Ray-Ban, Persol and many other brands.

• Maximilian von Baumbach ($5.4B) – Germany, 27 years old The oldest of the four von Baumbach siblings who inherited the pharmaceutical fortune. All four siblings are worth the exact same amount – $5.4 billion each – based on their equal stakes in the company.

• Katharina von Baumbach ($5.4B) – Germany, 25 years old The only female among the four von Baumbach siblings who inherited stakes in Boehringer Ingelheim. The German pharmaceutical giant is currently led by their uncle, Hubertus von Baumbach, who took over in 2015.

• Franz von Baumbach ($5.4B) – Germany, 23 years old Johannes’s brother is also an heir to the Boehringer Ingelheim fortune. The pharmaceutical company has roots dating back to 1817, making it one of the oldest businesses represented on this list.

• Johannes von Baumbach ($5.4B) – Germany, 19 years old The youngest billionaire on Earth. Heir to Boehringer Ingelheim, the world’s largest privately-owned pharmaceutical company founded

in 1885. He competes in skiing in Austria, the family is extremely private about business.

8)Zahan Mistry ($4B) – Ireland, 26 years old Firoz’s brother also inherited 4.6% of Tata Sons, plus a 25% stake in construction company Shapoorji Pallonji Group. In March, the brothers secured $3.3B in credit from private funds to refinance SP Group’s debts.

9)Firoz Mistry ($4B) – Ireland, 28 years old Inherited a 4.6% stake in $165B conglomerate Tata Sons after his father died in a car accident in 2022. The Mumbai-based group owns 30 companies spanning cars to jewellery with presence across 6 continents and 100+ countries.

10)Kevin David Lehmann ($3.6B) – Germany, 22 years old Received a 50% stake in dm-drogerie markt at just 14 years old from his father, who first invested in 1974. This German drugstore chain now has 4,120+ stores across Europe.

11)  Ed Craven ($2.8B) – Australia, 29 years old The other SELF-MADE billionaire under 30! Co-founded Stake, reportedly the world’s largest crypto-backed online casino, which generated $4.7B in revenue last year. The platform handles 2-4% of ALL Bitcoin transactions globally!

12) Sophie Luise Fielmann ($2.8B) – Germany, 30 years old She inherited a third of Fielmann AG after her father died last year. He founded the company in 1972 with a mission to bring affordable eyeglasses to Germany. Unlike her brother Marc, Sophie has no role in the business.

13)  Remi Dassault ($2.8B) – France, 23 years old His great-grandfather survived the Holocaust and invented a propeller used in WWI. Remi inherited a 4.1% stake in aerospace giant Dassault Aviation and 2.5% of software firm Dassault Systèmes after his father died in 2021.

14)  Katharina Andresen ($2B) – Norway, 29 years old Alexandra’s sister also owns 42% of Ferd, the family investment firm focused on real estate, finance and Nordic companies. Unlike her sister, Katharina is an LGBTQ+ rights advocate who serves as an advisor for Oslo Pride.

15)  Alexandr Wang ($2B) – USA, 28 years old The youngest self-made billionaire on this list. He dropped out of MIT after his freshman year to co-found Scale AI, which labels data for AI models like ChatGPT and self-driving cars. Microsoft, GM, and Meta are among his clients.

16)  Alexandra Andresen ($1.9B) – Norway, 28 years old Her wealth comes from a 150-year-old cigarette company her father sold in 2005. The family now runs Ferd, an investment firm where she owns a 42% stake and sits on the board. She’s also a former champion horse rider

17) Maxim Tebar ($1.1B) – Germany, 24 years old His billions come from chainsaws. Specifically, a stake in Stihl, founded in 1926 by Andreas Stihl who built the first two-person electric chainsaw. Today, the family-owned business sells power equipment in over 160 countries.

18) Kim Jung-youn ($1.3B) – South Korea, 21 years old Jung-min’s younger sister also inherited 9% of Nexon. Their father, Kim Jung-ju, founded the gaming giant. Neither sister has an operational role in running the company.

19) Kim Jung-min ($1.3B) – South Korea, 23 years old She inherited a 9% stake in Nexon after her father’s death in 2022. Nexon revolutionised gaming as a pioneer of the free-to-play model and became an industry leader in MMORPGs.

20) Dora Voigt de Assis ($1.2B) – Brazil, 27 years old Lívia’s sister also inherited 3.1% of WEG from their grandfather Werner Ricardo Voigt. Unlike many heirs on this list, the Voigt sisters have no operational roles in the company that made them billionaires.

21) Lívia Voigt de Assis ($1.2B) – Brazil, 20 years old This student inherited a 3.1% stake in WEG, an industrial machinery company her grandfather co-founded. WEG produces over 21 million electric motors annually, exporting to 135+ countries.