Alkermes plc. — Director's Dealing 2013

Dec 20, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2013-12-19

Reporting Person: BIBERSTEIN KATHRYN L (SVP, GC, Secretary, Alks, Inc.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-12-19	Ordinary Shares	M	5625	$12.30	Acquired	57516	Direct
2013-12-19	Ordinary Shares	M	2067	$14.90	Acquired	59583	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-12-19	Incentive Stock Option (Right to Buy)	$12.30	M	5625	Disposed	2014-07-12	Ordinary Shares (5625)	Direct
2013-12-19	Incentive Stock Option (Right to Buy)	$14.90	M	2067	Disposed	2014-12-17	Ordinary Shares (2067)	Direct

Footnotes

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