William A. Sahlman is the Dimitri V. D'Arbeloff, Class of 1955, Professor of Business Administration at Harvard Business School. Professor Sahlman is Senior Associate Dean for External Relations. He was formerly co-chair of the Entrepreneurial Management Unit, Senior Associate Dean, Director of Publishing Activities, and Chairman of the Board of Harvard Business School Publishing Corporation. He is a member of the Board of Directors of iWalk, Inc., and Chairman of the Advisory Committee for Harvard Stem Cell Science. He is a member of the Board of Advisors for several private companies. Professor Sahlman’s research focuses on the investment and financing decisions made in entrepreneurial ventures at all stages in their development.