Charles R. Schaller

Director, Medarex Inc.

Mr. Schaller has been a Director of Medarex since 1987, and was Chairman of the Medarex Board of Directors from 1987 - 1997. Since 1989, Mr. Schaller has been a chemical industry management consultant and, until June 2002, he served as a director of AstroPower, Inc., a publicly traded U.S. manufacturer of photo-voltaic (PV) products. Mr. Schaller is a graduate of Yale University and is a graduate of the program in management development at Harvard Business School.