JPMorgan Chase has made significant changes to its leadership structure. Two investment bankers, Doug Petno and Troy Rohrbaugh, have been promoted to copresidents of the bank. This move is seen as setting up potential successors to the current CEO, Jamie Dimon.

The bank's announcement also mentioned Marianne Lak, though details of her involvement are not specified. Further information on these developments can be found through KPRC 2 Houston, which reported on the promotions and their implications for the bank's future leadership.