Alkermes plc. — Director's Dealing 2013

Oct 2, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2013-10-01

Reporting Person: BREYER ROBERT A (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-10-01	Ordinary Shares	M	5000	$14.04	Acquired	59506	Direct
2013-10-01	Ordinary Shares	S	5000	$32.92	Disposed	54506	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-10-01	Non Qualified Stock Option (Right to Buy)	$14.04	M	5000	Disposed	2016-09-21	Ordinary Shares (5000)	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: These options are fully vested in accordance with their terms.