JPMorgan CEO Jamie Dimon plans to stay for a few more years before transitioning to executive chairman, with Marianne Lake emerging as a top succession

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

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