Alkermes plc. — Director's Dealing 2015

Feb 18, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2015-02-17

Reporting Person: Ehrich Elliot (SVP, R&D & CMO, Alkermes, Inc.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-02-17	Ordinary Shares	M	18000	$18.105	Acquired	40973	Direct
2015-02-17	Ordinary Shares	S	14200	$70.7447	Disposed	26773	Direct
2015-02-17	Ordinary Shares	S	3800	$71.3463	Disposed	22973	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-02-17	Employee Stock Option (Right to Buy)	$18.105	M	18000	Disposed	2021-05-20	Ordinary Shares (18000)	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 $70.24 to $71.17. 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 $71.24 to $71.525. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5: Shares subject to the stock option award vest in four equal annual installments commencing on 5/20/12.