Alkermes plc. — Director's Dealing 2013

Jan 15, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2013-01-15

Reporting Person: Pugh Gordon G (SVP, COO & CRO, Alkermes, Inc.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-01-15	Ordinary Shares	M	4228	$14.57	Acquired	18563	Direct
2013-01-15	Ordinary Shares	M	25772	$14.57	Acquired	44335	Direct
2013-01-15	Ordinary Shares	S	30000	$22.2957	Disposed	14335	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-01-15	Incentive Stock Option (Right to Buy)	$14.57	M	4228	Disposed	2013-10-17	Ordinary Shares (4228)	Direct
2013-01-15	Non Qualified Stock Option (Right to Buy)	$14.57	M	25772	Disposed	2013-10-17	Ordinary Shares (25772)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares	5000	Indirect
Ordinary Shares	15000	Indirect

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 $22.01 to $22.52. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

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