JPMorgan Chase & Co. on Tuesday named Jennifer Piepszak its new chief operating officer, but the company’s four major department heads remain more likely successors to Chief Executive Jamie Dimon to head up the largest U.

The largest U.S. bank by assets has elevated Jennifer Piepszak to chief operating officer, in preparation for Daniel Pinto's retirement in 2026. But Piepszak is not interested in being CEO, the company said.

The executive shuffle is the latest twist in the long-running question of who will succeed Jamie Dimon, the longest-serving major US bank CEO.