BILLIONAIRE BROS

THE ISHBIAS ARE JUST ONE OF MANY SETS OF SIBLINGS AMONG THE WORLD’S TEN-FIGURE FORTUNES. THREE OTHER NOTABLE PAIRS:

Tom and Alec Gores

NET WORTHS: $9.1 billion, $2.2 billion

The Gores family emigrated from Israel to Michigan when Tom and Alec were kids. They spent the late ’80s and early ’90s learning the private equity business together before splitting in 1995 and competing for buyout deals. Tom, 59, owns the NBA’s Detroit Pistons while Alec, 71, sponsored the SPAC that took the Ishbias’ UWM public in 2021.

Cameron and Tyler Winklevoss

NET WORTHS: $2.7 billion, $2.7 billion

The 42-year-old identical twins rowed at the 2008 Beijing Olympics after graduating from Harvard, where they accused Mark Zuckerberg of stealing their idea for a social network. They won a $65 million settlement in 2008. But the Winklevii really made their billions as early bitcoin and ethereum investors, with holdings now worth an estimated $2.6 billion apiece. This February, their crypto exchange, Gemini, agreed to return at least $1.1 billion to customers in a settlement with regulators related to the 2023 bankruptcy of its crypto lending business partner Genesis.

Charles and Bill Koch

NET WORTHS: $58.5 billion, $2 billion

Charles, 88, remains chairman and co-CEO of his family’s $125 billion (2022 sales) conglomerate, Koch Industries. That might not be the case if his brother David (d. 2019) hadn’t backed him when their other two brothers, Bill and Frederick (d. 2020), conspired to oust Charles from the family firm. Bill and Frederick agreed to a buyout in 1983, but the brothers battled in court over the amount (reportedly around $800 million) for more than a decade, finally reaching an undisclosed settlement in 2000. Charles still refers to Bill and Frederick as “the others.”