Alkermes plc. — Director's Dealing 2015

Dec 2, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2015-12-01

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-12-01	Ordinary Shares	M	50000	$18.60	Acquired	603497	Direct
2015-12-01	Ordinary Shares	S	23748	$71.988	Disposed	579749	Direct
2015-12-01	Ordinary Shares	S	24052	$72.4751	Disposed	555697	Direct
2015-12-01	Ordinary Shares	S	2200	$73.4556	Disposed	553497	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-12-01	Non Qualified Stock Option (Right to Buy)	$18.60	M	50000	Disposed	2015-12-09	Ordinary Shares (50000)	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 $71.32 to $72.31. 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 $72.32 to $73.31. 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 $73.32 to $73.68. 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.