Alkermes plc. — Director's Dealing 2016

Mar 1, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2016-02-26

Reporting Person: Stejbach Mark (SVP/Chief Comm Off, Alks Inc)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-02-26	Ordinary Shares	M	2625	—	Acquired	22189	Direct
2016-02-26	Ordinary Shares	F	852	$33.61	Disposed	21337	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-02-26	Restricted Stock Unit Award	$0	M	2625	Disposed		Ordinary Shares (2625)	Direct
2016-02-29	Employee Stock Option (Right to Buy)	$32.27	A	85000	Acquired	2026-02-28	Ordinary Shares (85000)	Direct
2016-02-29	Restricted Stock Unit Award	$0	A	21000	Acquired		Ordinary Shares (21000)	Direct

Footnotes

F1: Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing 2/26/2016.

F2: Shares subject to the stock option award vest in four equal annual installments commencing on 3/1/2017.

F3: Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing 3/1/2017.