Alkermes plc. — Director's Dealing 2011

Nov 8, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2011-11-05

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-11-05	Common Stock	F	159	$16.12	Disposed	18420	Direct
2011-11-08	Common Stock	S	341	$15.54	Disposed	18079	Direct

Footnotes

F1: This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.