William P. Stewart is CEO and Chairman of W.P. Stewart & Co Ltd. He is also a portfolio manager at the company and runs one of its largest funds the WP Stewart Holdings. He is somewhat of a stalwart of the financial world having a career which has spanned over half a century. He started out back in 1955 as a trader on the NYSE and then went on to work at Spingarn, Heine & Co, Pyne, Kendall & Hollister and Ruane, Cunniff & Co. After 20 years of working for these companies in various capacities ranging from analyst to managing director he set up W.P Stewart & Co 1975.