Alkermes plc. — Director's Dealing 2015

Apr 23, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2015-04-21

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-04-21	Ordinary Shares	M	25000	$16.55	Acquired	49956	Direct
2015-04-21	Ordinary Shares	S	10228	$61.9888	Disposed	39728	Direct
2015-04-21	Ordinary Shares	S	14772	$62.6606	Disposed	24956	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-04-21	Employee Stock Option (Right to Buy)	$16.55	M	25000	Disposed	2022-05-21	Ordinary Shares (25000)	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 $61.345 to $62.325. 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 $62.34 to $62.91. 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 5/21/13.