Jamie Dimon Is Now a Billionaire, and He Got There in an Unusual Way

Jamie Dimon, who helped assemble Citigroup Inc. and then improved on the experiment with JPMorgan Chase & Co., is responsible for two of the biggest banks the world has ever seen. His life’s work also made him rich.

With JPMorgan shares near a record high, Dimon’s net worth is about $1.1 billion, according to the Bloomberg Billionaires Index. Dimon’s fortune derives from a $485 million stake in New York-based JPMorgan, where he’s been chief executive officer since the end of 2005, and an investment portfolio seeded by proceeds from Citigroup stock sales.