Alkermes plc. — Director's Dealing 2016

Sep 22, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2016-09-21

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-09-21	Ordinary Shares	M	1166	$18.105	Acquired	46477	Direct
2016-09-21	Ordinary Shares	S	1166	$50.8081	Disposed	45311	Direct
2016-09-22	Ordinary Shares	M	3834	$18.105	Acquired	49145	Direct
2016-09-22	Ordinary Shares	S	3834	$50.8415	Disposed	45311	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-09-21	Employee Stock Option (Right to Buy)	$18.105	M	1166	Disposed	2021-05-20	Ordinary Shares (1166)	Direct
2016-09-22	Employee Stock Option (Right to Buy)	$18.105	M	3834	Disposed	2021-05-20	Ordinary Shares (3834)	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 $50.80 to $50.835. 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 $50.80 to $51.00 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.