HRMY HARMONY BIOSCIENCES HOLDINGS INC Management Changes 8-K Filing 2023 - Management Changes Harmony Biosciences Holdings, Inc. announced the resignation of John C. Jacobs as President and CEO, appointment of Dr. Jeffrey M. Dayno as Interim CEO, and appointment of Jeffrey S. Aronin as Executive Chairman.Get access to all SEC 8-K filings of the HARMONY BIOSCIENCES HOLDINGS INC