The world of global wealth is changing; we are seeing a new set of ultra-high net worth individuals come into play. By December 2025, the list of the world’s youngest billionaires is dominated not by the tech prodigies of Silicon Valley, which grew empires out of garages, but by the heirs to very well-established legacy fortunes in Europe and South America. These young people, all under the age of 25, have fortunes which, for most, are nothing short of a dream, which largely come from inherited shares in pharma companies, luxury goods groups, and industrial giants.
Here’s a look at the 10 youngest billionaires in the world for December 2025.
- Johannes von Baumbach (age 19).
- Net Worth: Five and a half billion Dollars.
- Country: Deutschland.
- Source of Wealth: Boeringer Ingelehm.
At the head of the list is Johannes von Baumbach, a name that is put forth with German pharmaceutical excellence. At 19 years old, he is the world’s youngest billionaire. His fortune comes from a large inherited stake in Boehringer Ingelheim, which is the world’s largest private pharmaceutical company. Though he is a multi-billion-dollar player, Johannes keeps a low profile and is not at present involved in the day-to-day goings on of the family business, which is run by his uncle.
- Livia Voigt de Assis (age 20).
- Net Worth: One point two Billion Dollars.
- Country: Brazil.
- Source of Wealth: WEDGE.
Livia Voigt de Assis is the new face of Latin American wealth. At 26, she is the youngest in the line of WEG, which she was born into, a large electrical motor manufacturing company that her grandfather started. Now a university student in the psychology program, she does not play a role in the company’s leadership. Her fortune is a testament to the great success of WEG, which has grown to be a global industrial giant.
- Clemente Del Vecchio (age 20).
- Net Worth: 6.1 Billion Dollars.
- Country: Italy.
- Source of Wealth: Delfin (Luxottica).
Clemente is a member of the large family group that is the heir to the fortune which was left by his father, Leonardo Del Vecchio, who was also the founder of the company which became EssilorLuxottica. As a main stockholder in Delfin, he is also in charge of the fortunes of such well-known brands as Ray-Ban and Oakley. Also, at present, he is the richest among the top three youngest billionaires, which is a display of the very large size of the global eyewear market.
- Kim Young at 21.
- Net Worth: One point three billion.
- Country: South Korea.
- Source of Wealth: Nexon
The late Kim Jung-ju, founder of the gaming giant Nexon, left his daughter Kim Jung-youn a large share of NXC, its parent company. She is known to have a large personal wealth as a result of that, which has gone into the very large profits of the global online gaming industry. Like many on this list, she keeps to a private life out of the public eye.
- Kevin David Lehmann (at the age of 22).
- Net Worth: Three and a quarter billion dollars.
- Country: Germany.
- Source of Wealth: Dm drug store market.
At a very young age, Kevin David Lehmann became a billionaire, which is a result of his father’s transfer to him a 50% stake in the German drugstore chain dm-drogerie markt. The company is a retail empire in Europe. Kevin does not get involved in the day-to-day operation of the business, which he leaves to the experienced management team that runs the retail giant.
