Alkermes plc. - Director's Dealing 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2024-02-23

Reporting Person: Hopkinson Craig C. (EVP R&D, Chief Medical Officer)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-02-23	Ordinary Shares	M	7689	—	Acquired	113123	Direct
2024-02-23	Ordinary Shares	F	3414	$29.57	Disposed	109709	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-02-23	Restricted Stock Unit Award	$	M	7689	Disposed		Ordinary Shares (7689)	Direct
2024-02-26	Employee Stock Option (Right to Buy)	$30.04	A	111186	Acquired	2034-02-26	Ordinary Shares (111186)	Direct
2024-02-26	Restricted Stock Unit Award	$	A	27464	Acquired		Ordinary Shares (27464)	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 2/23/2024.

F3: Shares underlying the stock option vest and become exercisable in four equal annual installments commencing on 2/26/2025.

F4: Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 2/26/2025.