India, April 4 -- The world's youngest billionaire is Johannes von Baumbach, aged 19. He is the heir to Germany's Boehringer Ingelheim, the world's largest privately owned pharmaceutical company.

According to a Forbes report, he and three of his older siblings, who are now 23, 25, and 27, are worth an estimated $5.4 billion each.

The von Baumbach family is also publicity-shy. According to the report, of the little known about Johannes Von Baumbach, he skis competitively in Austria.

It is also actually unknown if he or any of his three other siblings hold any role in the company.

Boehringer Ingelheim has been led by their uncle, Hubertus von Baumbach, since 2015.

The fact that they inherited their wealth is a broader trend. All, but t...