John Sigsbee Rees Shad (June 27, 1923 – July 7, 1994), served as chairman of U.S. Securities and Exchange Commission between 1981 and 1987. He also served as the ambassador to the Netherlands. He earned degrees from the University of Southern California, the Harvard Business School and the New York University Law School.
He said when he was the head of the SEC that he had wanted to spend a third of his life learning, a third earning, and a third serving.
He had two children, Leslie Shad and Rees Shad, and was married to Patricia Shad.