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: BIBERSTEIN KATHRYN L (EVP/CLO/CCO Alks Inc; Sec ALKS)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-02-26	Ordinary Shares	M	3750	—	Acquired	5129	Direct
2016-02-26	Ordinary Shares	F	1217	$33.61	Disposed	3912	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-02-26	Restricted Stock Unit Award	$0	M	3750	Disposed		Ordinary Shares (3750)	Direct
2016-02-29	Employee Stock Option (Right to Buy)	$32.27	A	100000	Acquired	2026-02-28	Ordinary Shares (100000)	Direct
2016-02-29	Restricted Stock Unit Award	$0	A	23000	Acquired		Ordinary Shares (23000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares	94000	Indirect

Footnotes

F1: Shares held by the Kathryn L. Biberstein 2015 Annuity Trust dated December 11, 2015 (the "2015 GRAT"). The Reporting Person is a trustee and beneficiary of the 2015 GRAT and may be deemed to hold voting and dispositive power with regard to the reported shares held by the 2015 GRAT.

F2: Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing 2/26/2016.

F3: Shares subject to the stock option award vest in four equal annual installments commencing on 3/1/2017.

F4: Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing 3/1/2017.