Alkermes plc. — Director's Dealing 2016

May 23, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2016-05-21

Reporting Person: Cooke Shane (President, Alkermes plc)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-05-21	Ordinary Shares	M	5625	—	Acquired	60509	Direct
2016-05-21	Ordinary Shares	F	2925	$42.98	Disposed	57584	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-21	Restricted Stock Unit Award	$0	M	5625	Disposed		Ordinary Shares (5625)	Direct

Footnotes

F1: This RSU award is fully vested in accordance with its terms.