Dennis B. Levine (born August 5, 1952) is a corporate consultant and former investment banker. He was a managing director at the iconic Wall Street investment banking firm Drexel Burnham Lambert, where he was a major player in the merger and acquisition business in the 1980s. His career on Wall Street came to an abrupt end when he was prosecuted by then U.S. Attorney, Rudy Giuliani, for insider trading. Levine was one of the first of several high-profile insider trading defendants in the Wall Street insider trading investigations of the mid-1980s. As a result of the investigation and subsequent proceedings, Levine pleaded guilty to various charges related to insider trading.