Claude H. Nash (born 1943) was CEO of Bloodstone Ventures plc. from 2007 to 2010. From 2004 to 2006 he was vice president, research and development at the University of Maryland Biotechnology Institute. He previously cofounded, and was CEO and chairman of, ViroPharma Incorporated, a pharmaceutical company. Before founding ViroPharma, Nash was vice president of infectious disease and cancer research at the Schering-Plough Research Institute.