Alkermes plc. — Director's Dealing 2015

Mar 24, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2015-03-23

Reporting Person: Cooke Shane (President, Alkermes plc)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-03-23	Ordinary Shares	M	18000	$14.60	Acquired	53180	Direct
2015-03-23	Ordinary Shares	S	13300	$65.1391	Disposed	39880	Direct
2015-03-23	Ordinary Shares	S	4700	$65.867	Disposed	35180	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-03-23	Employee Stock Option (Right to Buy)	$14.60	M	18000	Disposed	2021-10-05	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 $64.53 to $65.52. 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 $65.53 to $66.48. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5: The option becomes exercisable in equal annual installments over a four year period, at the rate of 25% per year commencing on 10/5/12.