Jamie Dimon.

Jamie Dimon is the Chairman and CEO of JPMorgan Chase, the largest bank in the United States and one of the most significant financial institutions in the world.

While Dimon did not found JPMorgan, his entrepreneurial leadership has been transformative: he was the architect of some of the most consequential deals in banking history, including the acquisitions of Bear Stearns and Washington Mutual during the 2008 financial crisis. Under his leadership, JPMorgan Chase has become a technology powerhouse, investing over $15 billion annually in technology and employing more software engineers than most tech companies. Dimon is widely regarded as the most influential banker in the world and has been recognized by Institutional Investor as the top CEO in financial services. His annual shareholder letters are among the most widely read business documents in America. While not a founder in the traditional sense, Dimon's entrepreneurial approach to banking-particularly in technology, digital banking, and strategic acquisitions-has redefined what a modern financial institution can be.