Jamie Dimon’s Handpicked Wall Street Duo Hunts More Market Share

One was in the car with her family, the other had his phone off, when Jamie Dimon began dialing their numbers on a Saturday in January with a question: Could they run a Wall Street operation bigger than Goldman Sachs?

That’s how Jenn Piepszak and Troy Rohrbaugh learned they were about to co-lead JPMorgan Chase & Co.’s massive commercial and investment bank — one of the industry’s most significant leadership changes in years. Their task: Continue building a Wall Street juggernaut that already ranks near the top of every major business line.

In their first interview since taking the post, Piepszak and Rohrbaugh, both 54, described the whirlwind that ensued as they figured out how they wanted to run the business, installed a leadership team and prepared to present their plan to shareholders in May. They also explained how they landed on strategic efforts that include handling a greater share of corporate cash flows and offering more advice to innovators.

The division just posted a record $35.5 billion of revenue for the year’s first half.

The shakeup by Chief Executive Officer Dimon, 68, is giving his potential successors more experience running key parts of the bank. Piepszak and her former co-head atop JPMorgan’s retail arm, Marianne Lake, have long been seen as the most likely candidates. But the move in January made Rohrbaugh the leading dark horse.

It all began when Piepszak answered her phone with her son in the back seat. She had an inkling of who it might be. “Jamie’s the only person I know who shows up as ‘No Caller ID,’” she said.

Rohrbaugh, visiting his mother in a Baltimore hospital, turned on his device to discover a series of missed calls from a blocked number, as well as his then-boss. “She’s like, ‘Don’t you think you should call back?’” Rohrbaugh recalled. “I said, ‘Well, either the building’s on fire, I’m getting promoted, or I’m getting fired.”

Dimon asked about his mom, then told him about the promotion.