Alkermes plc. — Director's Dealing 2013

Aug 5, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2013-08-05

Reporting Person: LANDINE MICHAEL J (SVP, Corp Dev., Alkermes, Inc.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-08-05	Ordinary Shares	M	10000	$14.57	Acquired	128946	Direct
2013-08-05	Ordinary Shares	M	3500	$12.16	Acquired	132446	Direct
2013-08-05	Ordinary Shares	S	6400	$34.2925	Disposed	126046	Direct
2013-08-05	Ordinary Shares	S	7100	$34.9494	Disposed	118946	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-08-05	Non Qualified Stock Option (Right to Buy)	$14.57	M	10000	Disposed	2013-10-17	Ordinary Shares (10000)	Direct
2013-08-05	Non Qualified Stock Option (Right to Buy)	$12.16	M	3500	Disposed	2013-12-10	Ordinary Shares (3500)	Direct

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 $33.675 to $34.575. 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 $34.7267 to $35.27. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5: These options are fully vested in accordance with their terms.