Alkermes plc. — Director's Dealing 2017

May 30, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2017-05-28

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-28	Ordinary Shares	M	1250	—	Acquired	31563	Direct
2017-05-28	Ordinary Shares	F	406	$57.70	Disposed	31157	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-05-28	Restricted Stock Unit Award	$0	M	1250	Disposed		Ordinary Shares (1250)	Direct

Footnotes

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