Alkermes plc. — Director's Dealing 2016

Sep 7, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2016-09-06

Reporting Person: Gaffin David Joseph (SVP, CLO, Alkermes, Inc.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-09-06	Ordinary Shares	M	2382	$14.38	Acquired	22816	Direct
2016-09-06	Ordinary Shares	S	2382	$45.9186	Disposed	20434	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-09-06	Employee Stock Option (Right to Buy)	$14.38	M	2382	Disposed	2016-12-12	Ordinary Shares (2382)	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 $45.37 to $46.32. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4: These options are fully vested in accordance with their terms.