James Dimon (/ˈdaɪmən/ DY-mən; born March 13, 1956) is an American businessman who has been the chairman and chief executive officer (CEO) of JPMorgan Chase since 2006.

The following year, at age of 30, Dimon was appointed chief financial officer (CFO) of Commercial Credit and later became the firm's president.

[6] His paternal grandfather was a Greek immigrant who had worked as a banker in Smyrna and Athens and later changed the family name from Papademetriou to Dimon.

[8] Jamie attended the Browning School[9] and majored in psychology and economics at Tufts University, graduating summa cum laude.

[12] After Dimon's graduation from Harvard Business School, Sandy Weill convinced him to turn down offers from Goldman Sachs, Morgan Stanley, and Lehman Brothers to join him as an assistant at American Express.

[20] When JPMorgan Chase merged with Bank One in July 2004, Dimon became president and chief operating officer of the combined company.

Under Dimon's leadership, with the acquisitions during his tenure, JPMorgan Chase has become the leading U.S. bank in domestic assets under management, market capitalization value and publicly traded stock value.

"[24] On May 10, 2012, JPMorgan Chase initiated an emergency conference call to report a loss of at least $2 billion in trades that Dimon said were "designed to hedge the bank's overall credit risks."

"[25] The episode was investigated by the Federal Reserve, the SEC and the FBI, and the central actor was labelled with the epithet the "London Whale.

[34][35] According to Good Jobs First's violation tracker, during Dimon's time heading JPMorgan Chase, the bank was fined $38 billion in total by the U.S. government, for legal and regulatory infractions.

[41] It is estimated that 70–80% of the dealmaking for the settlement was due to the outstanding legal exposures of Bear Stearns and Washington Mutual, which JPMorgan Chase had acquired at the encouragement of Treasury Secretary Hank Paulson, New York Fed President Timothy Geithner and other federal officials who helped broker the acquisitions, encouraged communication among the parties and even contributed financially to facilitate the transactions.

[54] Following the acquisition of Washington Mutual by JPMorgan Chase, Obama commented on Dimon's handling of the real-estate crash, credit crisis and the banking collapse affecting corporations nationwide, including major financial institutions like Bank of America, Citibank and Wachovia, and said he did "a pretty good job managing an enormous portfolio.

"[55] Dimon has had close ties to some people in the Obama White House, including former Chief of Staff Rahm Emanuel.

[56] Dimon was one of three CEOs—along with Goldman Sachs Chairman Lloyd Blankfein and Citigroup CEO Vikram Pandit—said by the Associated Press to have had liberal access to former Treasury Secretary Timothy Geithner.

[60] In December 2016, Dimon joined a business forum assembled by then president-elect Donald Trump to provide strategic and policy advice on economic issues.

[65] During the 2020 Democratic Party presidential primaries, Dimon criticized the lack of a "strong centrist, pro-business, pro-free enterprise" candidate.

[69] In May–June 2023, Dimon was encouraged by American billionaire and hedge fund manager Bill Ackman to run in the 2024 United States presidential election, after the former expressed his interest in pursuing a public office sometime in the future.

[70][71] Dimon clarified that he has no plans to run for office at this time, and that he is happy with his current leading position in JPMorgan Chase, where he expects to stay for three and a half more years.

[85] According to JP Morgan, Dimon recovered well from surgery,[86][87] with Gordon Smith and Daniel Pinto running the bank until his return.