James "Jamie" Dimon (born March 13, 1956) is an American business executive. He is the current chairman, president and chief executive officer of JPMorgan Chase, one of the Big Four banks of the United States, and has served as a Class A director of the Board of Directors of the New York Federal Reserve since January 2007. Dimon was named to Time magazine's 2006, 2008, 2009, and 2011 lists of the world's 100 most influential people.