Alkermes plc. — Director's Dealing 2026

Feb 27, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2026-02-26

Reporting Person: Nichols Christian Todd (SVP, Chief Commercial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-26	Ordinary Shares	M	5410	—	Acquired	118172	Direct
2026-02-26	Ordinary Shares	F	2403	$30.73	Disposed	115769	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-26	Restricted Stock Unit Award	$	M	5410	Disposed		Ordinary Shares (5410)	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 2/26/2025.