HARMONY BIOSCIENCES ANNOUNCES EXTENSION OF TENDER OFFER TO ACQUIRE ZYNERBA PHARMACEUTICALS, INC. PR Newswire PLYMOUTH MEETING, Pa., Sept. 27, 2023 PLYMOUTH MEETING , Pa. , Sept. 27, 2023 /PRNewswire/ -- In connection with the previously announced merger agreement, Harmony Biosciences Holdings, Inc. ("Harmony") (Nasdaq: HRMY), today announced that Xylophone Acquisition Corp., a wholly owned subsidiary of Harmony, has extended the expiration of its tender offer to acquire all of the outstanding...