Alkermes plc. — Director's Dealing 2026

Feb 25, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2026-02-23

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-23	Ordinary Shares	M	7689	—	Acquired	239291	Direct
2026-02-23	Ordinary Shares	F	3414	$32.19	Disposed	235877	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-23	Restricted Stock Unit Award	$	M	7689	Disposed		Ordinary Shares (7689)	Direct

Footnotes

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.