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According to the Bloomberg Billionaires index, Dimon, the CEO of JPMorgan, joins his mentor Sandy Weill as one of the few banking executives to become a billionaire.
Bloomberg writes that Dimon derives a bit less than half of his $1.1 billion net worth - $485 million - from his stake in JPMorgan, with the rest of his net worth coming from an investment portfolio spurred by his sale of Citigroup stock in the 1990s.
As Bloomberg notes, billionaire status among those in the finance world are usually reserved for asset managers like David Tepper, George Soros, and Bill Gross.
We last heard from Dimon when he was critical of shareholders who voted with proxy advisory firms, and against JPMorgan's recommendation, on $20 million his pay package for 2014.
"If you do that, you are just irresponsible, I'm sorry. And you probably aren't a very good investor, either," Dimon said.
And at least by Bloomberg's count, it seems Dimon himself knows what he's talking about.