John D. Arnold

John Douglas Arnold (born 1974) is an American billionaire, former hedge fund manager, and former natural gas trader instrumental in the Enron scandal. His firm, Centaurus Advisors, LLC, was a Houston-based hedge fund, composed of former Enron traders, that specialized in trading energy products. Arnold announced his retirement from running the hedge fund on May 2, 2012. Arnold now focuses on his political activism through Arnold Ventures LLC