Living in Milan, Vecchio became the youngest billionaire at 18 in 2022. His brothers, Luca, 22, and Leonardo Maria, 28, also feature on the list with the same net worth and stake in Delfin, with Leonardo serving as Luxottica’s chief strategy officer.

Kevin David Lehmann, 21, is the second-youngest billionaire on the list with a $2.5 billion net worth.

He owns 50% of dm-drogerie markt, a leading German drugstore chain with 3,700 outlets. His father transferred his share to him in 2017.

Alexandra Andresen, 27, with a net worth of $1.5 billion, and her sister Katharina inherited 42% of Ferd, a family-owned investment company. Their father Johan controls the company with 70% of the votes.

U.S. citizen Ryan Breslow, 29, dropped out of Stanford in 2014 to start Bolt, a payment startup with a valuation of $5 billion. Breslow encourages his employees to practice a four-day work week. He now has a net worth of $1.1 billion.

Gustav Magnar Witzoe, owning nearly half of Salmar ASA, a leading salmon producer, was gifted shares by his father who founded the company in 1991. Witzoe, with a net worth of $3.7 billion, also invests in real estate and tech startups.

Mark Mateschitz inherited a 49% stake in Red Bull from his late father, Dietrich Mateschitz, stepping down from his role at the company to focus on his shareholder responsibilities. He is the richest on the list with a $39.3 billion net worth.

Hong Kong-based Jonathan Kwok, after his father Walter Kwok’s death in 2018, took over Empire Group Holdings with his brother Geoffrey.

They inherited Walter’s stake in Sun Hung Kai Properties and are beneficiaries of family trusts. Kwok owns assets worth $2.2 billion.