X0609 4 2026-06-12 0001520262 Alkermes plc. ALKS 0001838503 Wright Christopher I true CONNAUGHT HOUSE 1 BURLINGTON ROAD DUBLIN L2 4 Ireland IRELAND 1 1 Ordinary Shares 2026-06-12 4 S 0 2000 45.10 D 25680 D This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 3/11/2026. /s/ Shantale Greenson, attorney-in-fact for Christopher I. Wright 2026-06-12