James Dimon, known as Jamie, is an American billionaire businessman ... He famously became a protégé of legendary finance executive Sandy Weill when Dimon wrote a thesis about the older financier.

Jamie Dimon is the Chairman and CEO of JPMorgan ... He first rose to fame as the right-hand man of Sandy Weill when they created Citigroup in a series of deals. Dimon was ousted from Citi and ...