As the wealth gap continues to widen, more people are being propelled into the ultra-rich billionaire class—but there’s even another layer of exclusivity at the top. While there are thousands of individuals out there with more than $1 billion in their bank accounts, a small cohort of “super-billionaires” are the real ones experiencing unprecedented wealth gains.

There are currently 29 “super-billionaires” out there boasting fortunes over $50 billion—and a majority of them live in the U.S., according to a November 21 analysis from data intelligence company Altrata, shared exclusively with Fortune.

This is the third consecutive year that the average billionaire’s bank account has risen—but most of the money has been concentrated among a select few. While the global billionaire population i

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