Alkermes plc. — Director's Dealing 2018

Feb 21, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

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

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-02-17	Ordinary Shares	M	3750	—	Acquired	15974	Direct
2018-02-17	Ordinary Shares	F	1148	$67.26	Disposed	14826	Direct
2018-02-20	Ordinary Shares	M	6582	$11.74	Acquired	21408	Direct
2018-02-20	Ordinary Shares	M	3588	$18.105	Acquired	24996	Direct
2018-02-20	Ordinary Shares	M	4107	$16.55	Acquired	29103	Direct
2018-02-20	Ordinary Shares	M	2965	$33.72	Acquired	32068	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-02-16	Restricted Stock Unit Award	$0	A	17500	Acquired		Ordinary Shares (17500)	Direct
2018-02-16	Employee Stock Option (Right to Buy)	$67.26	A	71000	Acquired	2028-02-16	Ordinary Shares (71000)	Direct
2018-02-17	Restricted Stock Unit Award	$0	M	3750	Disposed		Ordinary Shares (3750)	Direct
2018-02-20	Employee Stock Option (Right to Buy)	$11.74	M	6582	Disposed	2020-05-17	Ordinary Shares (6582)	Direct
2018-02-20	Employee Stock Option (Right to Buy)	$18.105	M	3588	Disposed	2021-05-20	Ordinary Shares (3588)	Direct
2018-02-20	Employee Stock Option (Right to Buy)	$16.55	M	4107	Disposed	2022-05-21	Ordinary Shares (4107)	Direct
2018-02-20	Employee Stock Option (Right to Buy)	$33.72	M	2965	Disposed	2023-05-28	Ordinary Shares (2965)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares	28856	Indirect
Ordinary Shares	113017	Indirect

Footnotes

F1: Shares held by the Kathryn L. Biberstein 2016 Annuity Trust dated December 9, 2016 (the "2016 GRAT"). The Reporting Person is a trustee and beneficiary of the 2016 GRAT and may be deemed to hold voting and dispositive power with regard to the reported shares held by the 2016 GRAT.

F2: Shares held by the Kathryn L. Biberstein 2017 Annuity Trust dated December 11, 2017 (the "2017 GRAT"). The Reporting Person is a trustee and beneficiary of the 2017 GRAT and may be deemed to hold voting and dispositive power with regard to the reported shares held by the 2017 GRAT.

F3: Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing on 2/16/19.

F4: Shares subject to the stock option award vest in four equal annual installments commencing on 2/16/2019.

F5: Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing on 2/17/18.

F6: These options are fully vested in accordance with their terms.