As the wealth gap continues to widen, more people are being propelled into the ultrarich billionaire class—but there’s yet 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 “superbillionaires” are particularly the ones experiencing unprecedented wealth gains.

There are currently 29 “superbillionaires” out there boasting fortunes of over $50 billion—and a majority of them live in the U.S., according to a Nov. 21 analysis from data intelligence firm 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 increased by 5.6% in 2024 to a new high of 3,508 people, over half of those individuals only hold between $1 billion and $2 billion in wealth. Meanwhile, the 17% of billionaires who have more than $5 billion to their names control 62% of all money in this 10-plus-figure group. If all the superbillionaires put their money together, they would have a $4.13 trillion honeypot on their hands—nearly the same value as the world’s most valuable company, Nvidia.