Alkermes plc. — Director's Dealing 2020

May 7, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2020-05-05

Reporting Person: LANDINE MICHAEL J (SVP, Corp Dev., Alkermes, Inc.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-05-05	Ordinary Shares	M	25000	$11.74	Acquired	226822	Direct
2020-05-05	Ordinary Shares	S	25000	$14.057	Disposed	201822	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-05-05	Employee Stock Option (Right to Buy)	$11.74	M	25000	Disposed	2020-05-17	Ordinary Shares (25000)	Direct

Footnotes

F1: This option exercise was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 3/1/2019.

F2: This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 3/1/2019.

F3: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $13.92 to $14.27. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4: These options are fully vested in accordance with their terms.