Alkermes plc. — Director's Dealing 2016

Oct 7, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2016-10-05

Reporting Person: BIBERSTEIN KATHRYN L (EVP/CAO/CCO Alks Inc; Sec ALKS)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-10-05	Ordinary Shares	M	5000	—	Acquired	41540	Direct
2016-10-05	Ordinary Shares	F	2353	$46.43	Disposed	39187	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-10-05	Performance Restricted Stock Units	$	M	5000	Disposed		Ordinary Shares (5000)	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: Each performance restricted stock unit represented a contingent right to receive one ordinary share of Alkermes plc.

F3: This performance restricted stock unit, which was granted to the reporting person on March 3, 2014, is fully vested in accordance with its terms.