Alkermes plc. — Director's Dealing 2025

Oct 10, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2025-10-08

Reporting Person: Reed Joshua (SVP, Chief Financial Officer)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-10-08	Employee Stock Option (Right to Buy)	$31.51	A	158743	Acquired	2035-10-08	Ordinary Shares (158743)	Direct
2025-10-08	Restricted Stock Unit Award	$	A	36656	Acquired		Ordinary Shares (36656)	Direct

Footnotes

F1: Shares underlying the stock option vest and become exercisable in four equal annual installments, commencing on 10/8/2026.

F2: Each restricted stock unit represents a contingent right to receive one ordinary share.

F3: Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 10/8/2026.