Alkermes plc. — Director's Dealing 2021

May 7, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2021-05-06

Reporting Person: POPS RICHARD F (Director, Director and CEO, Alkermes plc)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-06	Ordinary Shares	M	100000	$18.105	Acquired	892040	Direct
2021-05-06	Ordinary Shares	S	100000	$21.7941	Disposed	792040	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-06	Employee Stock Option (Right to Buy)	$18.105	M	100000	Disposed	2021-05-20	Ordinary Shares (100000)	Direct

Footnotes

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

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

F3: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $21.54 to $22.16. Full information regarding the number of shares sold at each separate price can be provided to the issuer, any security holder of the issuer or the SEC staff upon request.

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