Alkermes plc. — Director's Dealing 2014

May 6, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2014-05-05

Reporting Person: Ehrich Elliot (SVP, R&D & CMO, Alkermes, Inc.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-05-05	Ordinary Shares	M	5376	$18.60	Acquired	21955	Direct
2014-05-05	Ordinary Shares	F	2093	$47.75	Disposed	19862	Direct
2014-05-05	Ordinary Shares	M	2000	$20.79	Acquired	21862	Direct
2014-05-05	Ordinary Shares	F	870	$47.75	Disposed	20992	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-05-05	Incentive Stock Option (Right to Buy)	$18.60	M	5376	Disposed	2015-12-09	Ordinary Shares (5376)	Direct
2014-05-05	Incentive Stock Option (Right to Buy)	$20.79	M	2000	Disposed	2016-05-02	Ordinary Shares (2000)	Direct

Footnotes

F1: These options are fully vested in accordance with their terms.