Alkermes plc. — Director's Dealing 2015

Mar 3, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2015-03-02

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-03-02	Ordinary Shares	M	15000	$18.105	Acquired	21639	Direct
2015-03-02	Ordinary Shares	S	8200	$71.1195	Disposed	13439	Direct
2015-03-02	Ordinary Shares	S	6800	$71.7243	Disposed	6639	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-03-02	Employee Stock Option (Right to Buy)	$18.105	M	15000	Disposed	2021-05-20	Ordinary Shares (15000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares	30637	Indirect
Ordinary Shares	9190	Indirect
Ordinary Shares	10900	Indirect

Footnotes

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

F2: This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F3: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $70.45 to $71.425. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $71.45 to $71.96. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5: Shares held by KAS Grantor Retained Annuity Trust dated December 16, 2014 (the "GRAT"). The Reporting Person's spouse is a trustee and beneficiary of the GRAT.

F6: Shares subject to the stock option award vest in four equal annual installments commencing on 5/20/12.