Ben Navarro

The former Citigroup banker cofounded Sherman Financial Group in 1998 with fellow billionaire Brett Hildebrand and built it into a credit card and debt collection empire.

One of Sherman's key assets is the Las Vegas-based lender Credit One, which says it has doled out more than 18 million credit cards to date.

Despite a nearly identical name and logo to the better known Capital One Bank, Navarro's firm is entirely separate and caters mainly to low-credit borrowers.

Since 2021, the Charleston-based billionaire has spent more than $350 million buying up property around the city, including a stadium and historic hotel.

Navarro's daughter, Emma Navarro, is one of the top-ranked tennis players in the U.S.

Navarro has spent over $300 million to buy two professional tennis tournaments, in Cincinnati and Charleston; Credit One now sponsors both.