It is so exclusive that it has just three members.
Until Thursday, June 20, Bill Gates, who co-founded Microsoft, and Jeff Bezos, who founded Amazon, were its only members.
The $100 billion club, that's what we are talking about.
Membership is open to anyone whose personal wealth is over 100 billion dollars.
Its latest member is a Frenchman. Bernard Arnault's fortune is now estimated at $100.4 billion.
Arnault is the CEO of the LVMH group which makes Louis Vuitton handbags and Hennessy cognac among other things, both hugely popular in China.
Bloomberg noted that Arnault's fortune grew by $32 billion in 2019, the largest rise on its 500-member Bloomberg Billionaires Index.
His wealth, one report stated, now equals more than 3% of France's economy!
Among LVMH's other products are Dom Pérignon champagne and Sephora. Arnault also owns a 97% stake in the fashion house Christian Dior.
Gates became the planet's first $100 billionaire 20 years ago, in 1999.
Bezos joined him in November 2017; Amazon's CEO is now the wealthiest man on the third rock from the sun, with a personal fortune estimated at $ 119 billion (though how much of that he will lose after his divorce comes through, we will need to wait and see).
Bernard Jean Étienne Arnault is 70 years old and built his current business empire from scratch, using his father's wealth as capital.
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