Alkermes plc. — Director's Dealing 2023

Feb 22, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2023-02-18

Reporting Person: Nichols Christian Todd (SVP, Chief Commercial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-02-18	Ordinary Shares	M	6230	—	Acquired	27265	Direct
2023-02-18	Ordinary Shares	F	1961	$28.07	Disposed	25304	Direct
2023-02-20	Ordinary Shares	M	3824	—	Acquired	29128	Direct
2023-02-20	Ordinary Shares	F	1125	$28.07	Disposed	28003	Direct
2023-02-20	Ordinary Shares	A	22969	—	Acquired	50972	Direct
2023-02-20	Ordinary Shares	F	6753	$28.07	Disposed	44219	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-02-18	Restricted Stock Unit Award	$	M	6230	Disposed		Ordinary Shares (6230)	Direct
2023-02-20	Restricted Stock Unit Award	$	M	3824	Disposed		Ordinary Shares (3824)	Direct

Footnotes

F1: Each restricted stock unit represents a contingent right to receive one ordinary share.

F2: These ordinary shares were acquired by the reporting person as a result of the vesting of performance-vesting restricted stock unit awards granted to the reporting person on February 20, 2020 with a three-year performance period that ended on December 31, 2022 (the "2020 PRSUs"). The vesting of this portion of the 2020 PRSUs was triggered by the determination of achievement of certain pre-specified performance goals and application of a total shareholder return modifier and represents the final vesting event under the 2020 PRSUs.

F3: Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 2/18/2023.

F4: Shares subject to the restricted stock unit award vest in four equal annual installments, commencing on 2/20/2021.