Alkermes plc. — Director's Dealing 2011

Nov 21, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2011-11-18

Reporting Person: Pugh Gordon G (SVP, COO & CRO, Alkermes, Inc.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-11-18	Common Stock	M	3750	—	Acquired	27568	Direct
2011-11-18	Common Stock	F	1566	$15.00	Disposed	26002	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-11-18	Restricted Stock Award	$0	M	3750	Disposed		Common Stock (3750)	Direct

Footnotes

F1: 50% vested as of 11/18/11, remainder vests in 2 equal annual installments beginning on 11/18/12.