Alkermes plc. — Director's Dealing 2011

Sep 20, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2011-09-16

Reporting Person: FRATES JAMES M (SVP & CFO, Alkermes plc)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-09-16	Employee Stock Option (Right to Buy)	$18.105	A	100000	Acquired	2021-05-20	Common Stock (100000)	Direct
2011-09-16	Restricted Stock Unit Award	$0	A	15000	Acquired		Common Stock (15000)	Direct

Footnotes

F1: Vests in 4 equal annual installments beginning on 5/20/12.

F2: Received in exchange for, and having substantially the same terms as, stock options of Alkermes, Inc. common stock in connection with the Merger.

F3: Received in exchange for, and having substantially the same terms as, restricted stock unit awards of Alkermes, Inc. common stock in connection with the Merger.