Management Team

Biography PhotoEric R. Colson
President and Chief Executive OfficerEric R. Colson, CFA is a managing director and the Chief Executive Officer of Artisan Partners. Prior to joining the firm in January 2005, Mr. Colson was an executive vice president of Callan Associates, Inc. where he managed the institutional consulting group, providing business and investment advice to asset management firms. Prior to managing the institutional consulting group, he managed Callan's global manager research.

Mr. Colson holds a BA in economics from the University of California-Irvine.

Biography PhotoCharles (C.J.) Daley, Jr.
Executive Vice President, Chief Financial Officer and TreasurerCharles (C.J.) Daley, Jr. is a managing director and Chief Financial Officer of Artisan Partners. Prior to joining the firm in July 2010, Mr. Daley was principal, chief financial officer and treasurer of the global asset management firm Legg Mason, Inc.

Mr. Daley holds a bachelor's degree in accounting from the University of Maryland/College Park. He is an inactive Certified Public Accountant.

Biography PhotoJason A. Gottlieb
Executive Vice President and Chief Operating Officer of InvestmentsJason A. Gottlieb is a managing director and Chief Operating Officer of Investments of Artisan Partners. Prior to joining the firm in October 2016, Mr. Gottlieb was a partner and managing director at Goldman Sachs where he was a leader in Goldman Sachs’ Alternative Investment & Manager Selection Group and a portfolio manager on the Goldman Sachs Multi-Manager Alternatives Fund.

Mr. Gottlieb holds a bachelor's degree in finance from Siena College and a master’s degree in finance from Fordham University.

Biography PhotoJames S. Hamman, Jr.
Executive Vice PresidentJames S. Hamman, Jr. is a managing director and Head of Global Distribution and Corporate Development for Artisan Partners. Prior to joining the firm in March 2010, Mr. Hamman was a founder and principal of Elite Investment Partners LLC. Before that, he was general counsel of Calamos Investments.

Mr. Hamman holds a BBA from the University of Notre Dame and a JD from Northwestern University School of Law.

Biography PhotoSarah A. Johnson
Executive Vice President, Chief Legal Officer and SecretarySarah A. Johnson is a managing director and General Counsel of Artisan Partners. She also currently serves as the General Counsel of Artisan Partners Funds, Inc. Prior to joining the firm in July 2002, Ms. Johnson practiced law with the law firm of Bell, Boyd & Lloyd LLC in Chicago, Illinois.

Ms. Johnson holds a BA from Northwestern University and a JD from Northwestern University School of Law.

Biography PhotoGregory K. Ramirez
Executive Vice PresidentGregory K. Ramirez is a managing director and Head of Vehicle Administration for Artisan Partners. He also currently serves as Chief Financial Officer of Artisan Partners Funds, Inc. Prior to joining the firm in July 1997, Mr. Ramirez was an audit manager with Price Waterhouse, focusing on investment company audits and reviewing transfer agency controls.

Mr. Ramirez holds a BBA in accounting from the University of Iowa and an MBA from Marquette University. He is a Certified Public Accountant.