Alkermes plc. — Director's Dealing 2015

Aug 24, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2015-08-24

Reporting Person: Cooke Shane (President, Alkermes plc)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-08-24	Ordinary Shares	M	18000	$14.60	Acquired	58640	Direct
2015-08-24	Ordinary Shares	S	1000	$53.395	Disposed	57640	Direct
2015-08-24	Ordinary Shares	S	1200	$54.6522	Disposed	56440	Direct
2015-08-24	Ordinary Shares	S	2500	$56.6747	Disposed	53940	Direct
2015-08-24	Ordinary Shares	S	5661	$57.7769	Disposed	48279	Direct
2015-08-24	Ordinary Shares	S	5107	$58.6363	Disposed	43172	Direct
2015-08-24	Ordinary Shares	S	2532	$59.4083	Disposed	40640	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-08-24	Employee Stock Option (Right to Buy)	$14.60	M	18000	Disposed	2021-10-05	Ordinary Shares (18000)	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 $53.05 to $53.91. 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 $54.28 to $55.16. 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 $56.01 to $57.00. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F6: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $57.04 to $58.03. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F7: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $58.05 to $59.02. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F8: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $59.0675 to $59.77. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F9: The option becomes exercisable in equal annual installments over a four year period, at the rate of 25% per year commencing on 10/5/12.