Alkermes plc. — Director's Dealing 2018

Aug 3, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2018-08-01

Reporting Person: MITCHELL PAUL J (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-08-01	Ordinary Shares	M	1000	$8.98	Acquired	1000	Indirect
2018-08-01	Ordinary Shares	S	1000	$43.68	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-08-01	Non Qualified Stock Option (Right to Buy)	$8.98	M	1000	Disposed	2019-10-06	Ordinary Shares (1000)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares	8000	Direct

Footnotes

F1: This option exercise was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 12/12/17.

F2: The reporting person and his wife are co-trustees of The Paul J. Mitchell Trust and the reporting person is also a beneficiary of The Paul J. Mitchell Trust originally established on November 19, 2014 and amended and restated on September 8, 2017 ("The Paul J. Mitchell Trust").

F3: This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 12/12/17.

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

F5: These options were transferred from the reporting person to The Paul J. Mitchell Trust on December 11, 2017.