Charles R. Schaller

Founding Chairman and Director, Medarex, Inc.

Mr. Schaller became a Director of Celldex in November 2006 and served as Chairman of the Board of Directors from November 2006 - September 2009. Mr. Schaller has been a Director of Medarex, Inc. since its inception in 1987 and served as Chairman of the Medarex Board of Directors from 1987 - 1997. Since 1989, Mr. Schaller has been a chemical industry development consultant and, until June 2002, he served as a director of AstroPower, Inc., a major U.S. manufacturer of photovoltaic (PV) products, now part of General Electric. Mr. Schaller is a chemical engineering graduate of Yale University and is a graduate of the Harvard Business School Program for Management Development.