Building a fortune takes a lifetime. However, these Gen Z youngsters are already billionaires, even before turning 30.

Johannes von Baumbach (19) is the world’s youngest billionaire. The youngest heir to the German pharmaceutical company Boehringer Ingelheim, he boasts a net worth of $5.4 billion.

Brazil’s Lívia Voigt de Assis (20) is the second youngest billionaire in the world. She is a heir of WEG cofounder Werner Ricardo Voigt and owns a 3.1% stake in the company. Her net worth is $1.2 billion.

Next is Clemente Del Vecchio (20), the Italian billionaire owes his wealth to his 12.5% ownership of the holding company Delfin, which has a stake in EssilorLuxottica, the eyeglass company behind brands like Arnette, Ray-Ban and Persol. His net worth is $6.6 billion.

South Korea’s Kim Jung-youn (21) hold approximately 9% stakes in the game developer Nexon inherited through her late father. Her net worth is $1.3 billion.

Kevin David Lehmann (22) inherited his fortune after his father quietly passed him a 50% stake in dm-drogerie markt, Germany’s leading drugstore chain, in 2017, when Lehmann was only 14. His net worth is $3.6 billion.

Franz von Baumbach (23) is the second-youngest heir to the Ingelheim-based German drugmaker Boehringer Ingelheim. His net worth is $5.4 billion.

Like her younger sister, Kim Jung-min (23) inherited approximately 9% stakes in Nexon, a South Korean-Japanese online gaming company, after the 2022 death of their father, company founder Kim Jung-ju. Her net worth is $1.3 billion.

Luca Del Vecchio (23) has minority stakes in the eyeglasses behemoth EssilorLuxottica. Their family holding entity Delfin also owns stakes in other companies based in Italy and France, including the bank UniCredit and the insurer Generali. His net worth is $6.6 billion.

France’s Remi Dassault (23) owns an estimated 4.1% stake in aerospace giant Dassault Aviation, which was founded by his great-grandfather. He also owns an estimated 2.5% stake in the software firm Dassault Systèmes. His net worth is $2.8 billion.

Germany’s Maxim Tebar (24) owes his fortune to a stake in Stihl, one of the world’s leading manufacturers of chainsaws and other handheld power equipment. His net worth is $1.1 billion.