Alkermes plc. - Director's Dealing 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2018-02-16

Reporting Person: POPS RICHARD F (Director, Director and CEO, Alkermes plc)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-02-17	Ordinary Shares	M	8750	—	Acquired	646436	Direct
2018-02-17	Ordinary Shares	F	2581	$67.26	Disposed	643855	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-02-16	Restricted Stock Unit Award	$0	A	72500	Acquired		Ordinary Shares (72500)	Direct
2018-02-16	Employee Stock Option (Right to Buy)	$67.26	A	295000	Acquired	2028-02-16	Ordinary Shares (295000)	Direct
2018-02-17	Restricted Stock Unit Award	$0	M	8750	Disposed		Ordinary Shares (8750)	Direct

F1: Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing on 2/16/19.

F2: Shares subject to the stock option award vest in four equal annual installments commencing on 2/16/2019.

F3: Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing on 2/17/18.