Alkermes plc. — Director's Dealing 2015

Aug 4, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2015-08-03

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-08-03	Ordinary Shares	M	13750	$16.55	Acquired	27860	Direct
2015-08-03	Ordinary Shares	S	810	$69.5272	Disposed	27050	Direct
2015-08-03	Ordinary Shares	S	12640	$70.0963	Disposed	14410	Direct
2015-08-03	Ordinary Shares	S	300	$70.73	Disposed	14110	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-08-03	Employee Stock Option (Right to Buy)	$16.55	M	13750	Disposed	2022-05-21	Ordinary Shares (13750)	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 $68.68 to $69.63. 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 $69.73 to $70.52. 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 5/21/13.