Alkermes plc. — Director's Dealing 2013

Mar 15, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2013-03-14

Reporting Person: FRATES JAMES M (SVP & CFO, Alkermes plc)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-03-14	Ordinary Shares	M	8750	$9.97	Acquired	100957	Direct
2013-03-14	Ordinary Shares	M	7000	$14.57	Acquired	107957	Direct
2013-03-14	Ordinary Shares	S	15750	$22.7931	Disposed	92207	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-03-14	Non Qualified Stock Option (Right to Buy)	$9.97	M	8750	Disposed	2013-04-25	Ordinary Shares (8750)	Direct
2013-03-14	Non Qualified Stock Option (Right to Buy)	$14.57	M	7000	Disposed	2013-10-17	Ordinary Shares (7000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares	4000	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 $22.72 to $22.93. 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.