Alkermes plc announced that on December 4, 2023, following ten years of service, Nancy J. Wysenski notified the company of her decision to retire, for personal reasons, from the Company?s board of directors and from any Board leadership positions and committees on which she serves, in each case effective as of December 8, 2023. On December 7, 2023, the Board decreased the size of the Board from eleven directors to ten directors and appointed Frank Anders Wilson as the Lead Independent Director of the Board, in each case effective as of December 8, 2023.