Alkermes plc. - Director's Dealing 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2024-02-18

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

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-02-18	Ordinary Shares	M	6355	—	Acquired	154062	Direct
2024-02-18	Ordinary Shares	F	1869	$32.18	Disposed	152193	Direct
2024-02-20	Ordinary Shares	M	7177	—	Acquired	159370	Direct
2024-02-20	Ordinary Shares	F	2994	$30.39	Disposed	156376	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-02-18	Restricted Stock Unit Award	$	M	6355	Disposed		Ordinary Shares (6355)	Direct
2024-02-20	Restricted Stock Unit Award	$	M	7177	Disposed		Ordinary Shares (7177)	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 subject to the restricted stock unit award vest in four equal annual installments, commencing on 2/20/2021.