144 0001838503 XXXXXXXX LIVE 0001520262 Alkermes plc. 001-35299 CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN 4 L2 00000 00-353-1-772-8000 Wright Christopher I Officer Common Stock Merrill Lynch

225 Liberty Street Floor 37 New York NY 10281

2000 90200.00 166675807 06/12/2026 NASDAQ Common Stock 05/21/2026 Vesting of restricted stock unit awards Alkermes plc. N 2000 05/21/2026 Granted as part of issuer equity compensation plan Y 06/12/2026 03/11/2026 Christopher Wright