K.J. Martijn Cremers is the Martin J. Gillen Dean and the Bernard J. Hank Professor of Finance at the University of Notre Dame’s Mendoza College of Business. He served as interim dean at Mendoza from July 2018 to June 2019. His research areas are investment management, corporate finance, corporate governance, corporate law and business ethics. His co-authored paper “How Active is Your Fund Manager? A New Measure that Predicts Performance” (published in 2009 in the Review of Financial Studies) introduced Active Share, an innovative tool for determining the extent of active mutual fund management by measuring the percentage of stock holdings in a manager's portfolio that differs from the benchmark index. Prof. Cremers has long-standing consulting relationships with various investment managers, including the All Pensions Group from the Netherlands and Touchstone Investments from Cincinnati. He serves as an independent director at Ariel Investments, an investment company located in Chicago, and as an external consultant with State Street Associates, State Street's academic think tank and a division of State Street Global Exchange located in Boston.