Alkermes plc. — Director's Dealing 2017

Feb 16, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2017-02-15

Reporting Person: Ehrich Elliot (EVP, R&D & CMO, Alkermes, Inc.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-02-15	Ordinary Shares	S	1000	$58.17	Disposed	49657	Direct
2017-02-16	Ordinary Shares	M	10000	$16.55	Acquired	59657	Direct
2017-02-16	Ordinary Shares	S	3915	$56.0454	Disposed	55742	Direct
2017-02-16	Ordinary Shares	S	6085	$56.8371	Disposed	49657	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-02-16	Employee Stock Option (Right to Buy)	$16.55	M	10000	Disposed	2022-05-21	Ordinary Shares (10000)	Direct

Footnotes

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

F2: This option exercise 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 $55.56 to $56.55. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $56.56 to $57.18. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5: These options are fully vested in accordance with their terms.