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: Brown Iain Michael (VP Finance & CAO, Alkermes Inc)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-05-21	Ordinary Shares	M	2125	—	Acquired	51711	Direct
2016-05-21	Ordinary Shares	F	690	$42.98	Disposed	51021	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-21	Restricted Stock Unit Award	$0	M	2125	Disposed		Ordinary Shares (2125)	Direct

Footnotes

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