Dimon, who turned 70 in March, has been JPMorgan's boss for two decades, steering it through the financial crisis.

The moves would appear to make Doug Petno and Troy Rohrbaugh the most obvious possible successors to JPMorgan Chase CEO Jamie Dimon.

Jamie Dimon elevates two executives to co-presidents at JPMorgan Chase, continuing a succession playbook with major implications for the bank's blockchain