Alkermes plc. — Director's Dealing 2013

Aug 9, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2013-08-09

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-08-09	Ordinary Shares	M	45000	$11.74	Acquired	91321	Direct
2013-08-09	Ordinary Shares	S	45000	$34.1261	Disposed	46321	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-08-09	Employee Stock Option (Right to Buy)	$11.74	M	45000	Disposed	2020-05-17	Ordinary Shares (45000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares	5000	Indirect
Ordinary Shares	15000	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 $33.93 to $34.456. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4: Vests in 4 equal annual installments beginning on 5/17/11.