Alkermes plc. — Director's Dealing 2019

May 25, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2019-05-16

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-05-16	Ordinary Shares	M	60000	$8.55	Acquired	776433	Direct
2019-05-16	Ordinary Shares	S	60000	$25.4213	Disposed	716433	Direct
2019-05-23	Ordinary Shares	M	50000	$8.55	Acquired	766433	Direct
2019-05-23	Ordinary Shares	S	50000	$24.223	Disposed	716433	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-05-16	Employee Stock Option (Right to Buy)	$8.55	M	60000	Disposed	2019-05-26	Ordinary Shares (60000)	Direct
2019-05-23	Employee Stock Option (Right to Buy)	$8.55	M	50000	Disposed	2019-05-26	Ordinary Shares (50000)	Direct

Footnotes

F1: Late filing due to administrative error.

F2: This option exercise was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 3/2/18.

F3: This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 3/2/18.

F4: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $25.27 to $25.64. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $24.02 to $24.70. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

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