William D. Humphries is a businessperson who has been the head of 11 different companies. Presently, he is Chairman for STRATA Skin Sciences, Inc., Chairman for Clearside Biomedical, Inc., Chairman of Merz LLC, Chief Executive Officer at Isosceles Pharmaceuticals, Inc., Chairman at Merz Pharmaceuticals LLC and Chief Executive Officer & Director at Onpharma, Inc. Mr. Humphries is also on the board of PhaseBio Pharmaceuticals, Inc., Aclaris Therapeutics, Inc. and Merz Pharma Canada Ltd. and Chairman-Global Luxury Management Board at North Carolina State University.

William D. Humphries previously occupied the position of President-Ortho Dermatologics at Bausch Health Cos., Inc. Group Chairman & Executive Vice President at OraPharma, Inc. and President & Director at Medicis Pharmaceutical Corp. (both are subsidiaries of Bausch Health Cos., Inc.), Chairman, President & Chief Executive Officer at Merz, Inc., President & Chief Executive Officer at Merz North America, Inc., President-Dermatology at Stiefel Laboratories, Inc. and Vice President-Sales & Marketing at Allergan, Inc.

He received an MBA from Pepperdine University and an undergraduate degree from Bucknell University.