Karen Massey

Karen Massey has served as Chief Executive Officer of argenx, a global immunology company, since May 2026, after previously serving as Chief Operating Officer from March 2023 to April 2026. With more than twenty years in the biopharmaceutical industry, she spent nine years at Genentech (Roche Group) as Senior Vice President of Product Development and Global Clinical Operations, and held commercial roles at Pfizer and Bain & Company. Massey holds a Bachelor of Economics from the University of Sydney and an MBA from the NYU Stern School of Business.