Oprah Winfrey, Taylor Swift and Sam Altman among record 590 U.S. billionaires too poor for Forbes 400 as Africa’s once-poorest billionaire nears $2 billion

The Forbes 400 richest Americans list raised its entry threshold to $4.4 billion, excluding 590 billionaires including Oprah Winfrey, Taylor Swift, and Sam Altman. Meanwhile, Nigerian investor Femi Otedola's net worth has grown to nearly $2 billion through significant stakes in First Bank of Nigeria.