Jamie Dimon

American banker and CEO of JPMorgan Chase, the largest bank in the United States by assets and market capitalisation (~$800 billion). The longest-serving CEO of any major Wall Street bank.

Career arc: Harvard MBA → American Express (under Sandy Weill) → built Primerica → Travelers → Citigroup (president and COO, 1998) → fired by Weill → Bank One CEO (2000–2004, Chicago) → merged Bank One into JP Morgan Chase (2004) → Chairman and CEO of JP Morgan Chase (2006–present).

Known for the Fortress Balance Sheet framework — conservative accounting, ample capital, a liquidity buffer, and stress-testing to historical worst-ever outcomes. Orchestrated the crisis-era acquisitions of Bear Stearns (March 2008, $2/share), Washington Mutual (September 2008), and First Republic Bank (May 2023). Widely credited as a stabilising force during the 2008 financial crisis.

Author of annual shareholder letters widely read as substantive assessments of the US economy and financial system.

In the wiki

• Jamie Dimon on Building JP Morgan Chase, the Fortress Balance Sheet, and Not Blowing Up (Acquired, summer 2025) — Citigroup firing; Bank One turnaround; risk culture; Bear Stearns and WaMu acquisitions; strategy as business-fit discipline; cyber risk