JPMorgan names Doug Petno and Troy Rohrbaugh as co-presidents, each receiving $30M retention bonuses, as Marianne Lake exits after 25 years.

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

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