Alkermes plc. - Director's Dealing 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2025-02-18

Reporting Person: Gaffin David Joseph (EVP, CLO, Alkermes, Inc.)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-02-18	Ordinary Shares	M	6354	—	Acquired	194853	Direct
2025-02-18	Ordinary Shares	F	2822	$35.90	Disposed	192031	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-02-18	Restricted Stock Unit Award	$	M	6354	Disposed		Ordinary Shares (6354)	Direct
2025-02-19	Employee Stock Option (Right to Buy)	$35.84	A	63991	Acquired	2035-02-19	Ordinary Shares (63991)	Direct
2025-02-19	Restricted Stock Unit Award	$	A	30692	Acquired		Ordinary Shares (30692)	Direct

F1: Each restricted stock unit represents a contingent right to receive one ordinary share.

F2: Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 2/18/2023.

F3: Shares underlying the stock option vest and become exercisable in four equal annual installments commencing on 2/19/2026.

F4: Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 2/19/2026.