Alkermes plc. — Director's Dealing 2016

Apr 20, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2016-04-20

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-04-20	Ordinary Shares	M	12657	$20.79	Acquired	159419	Direct
2016-04-20	Ordinary Shares	M	4218	$20.79	Acquired	163637	Direct
2016-04-20	Ordinary Shares	S	9993	$40.971	Disposed	153644	Direct
2016-04-20	Ordinary Shares	S	6882	$41.2641	Disposed	146762	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-04-20	Non Qualified Stock Option (Right to Buy)	$20.79	M	12657	Disposed	2016-05-02	Ordinary Shares (12657)	Direct
2016-04-20	Incentive Stock Option (Right to Buy)	$20.79	M	4218	Disposed	2016-05-02	Ordinary Shares (4218)	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 $40.235 to $41.22. 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 $41.23 to $41.33. 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.