Peter A. Cohen is the chairman and CEO of Andover National Corporation, a public holding company. He was formerly the chairman and CEO of Cowen Inc., also known as Cowen & Company. Prior to his current role, Cohen founded Ramius Capital Management in 1994, a $13 billion investment firm, which he merged with Cowen Inc. in 2009. Prior to this, Cohen was the chairman and chief executive officer of Shearson Lehman American Express from 1983 through 1991.