Alkermes plc. — Director's Dealing 2023

May 31, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2023-05-30

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-05-30	Ordinary Shares	M	19634	$20.43	Acquired	68118	Direct
2023-05-30	Ordinary Shares	S	27134	$28.9254	Disposed	40984	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-05-30	Employee Stock Option (Right to Buy)	$20.43	M	19634	Disposed	2030-02-20	Ordinary Shares (19634)	Direct

Footnotes

F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 3/1/2023.

F2: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.56 to $29.19. Full information regarding the number of shares sold at each separate price can be provided to the issuer, any security holder of the issuer or the SEC staff upon request.

F3: Shares subject to the stock option award vest and become exercisable in four equal annual installments commencing on 2/20/2021.