Alkermes plc. — Director's Dealing 2015

Jun 1, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alkermes plc. (ALKS)
CIK: 0001520262
Period of Report: 2015-05-28

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-28	Ordinary Shares	M	2500	—	Acquired	85115	Direct
2015-05-28	Ordinary Shares	F	1178	$59.92	Disposed	48713	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-05-28	Restricted Stock Unit Award	$0	M	2500	Disposed		Ordinary Shares (2500)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares	4000	Indirect
Ordinary Shares	50801	Indirect
Ordinary Shares	41423	Indirect

Footnotes

F1: Includes 6,199 shares received on May 29, 2015 pursuant to an annuity payment from the James M. Frates Grantor Retained Annuity Trust dated March 14, 2014 (the "2014 GRAT"), which was exempt from reporting obligations by virtue of Rule 16a-13 promulgated under the Securities Exchange Act of 1934, as amended.

F2: Excludes 41,423 shares previously owned directly which were contributed to the James M. Frates Grantor Retained Annuity Trust dated May 29, 2015 (the "2015 GRAT") on June 1, 2015, which was exempt from reporting obligations by virtue of Rule 16a-13 promulgated under the Securities Exchange Act of 1934, as amended.

F3: Shares held by the 2014 GRAT. The Reporting Person is a trustee and beneficiary of the 2014 GRAT and may be deemed to share voting and dispositive power with regard to the reported shares held by the 2014 GRAT.

F4: Shares held by the 2015 GRAT. The Reporting Person is a trustee and beneficiary of the 2015 GRAT and may be deemed to hold voting and dispositive power with regard to the reported shares held by the 2015 GRAT.

F5: Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing on 5/28/14.