Edgar Filing: Peterson Rebecca

Ownership Submission

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person ^*

Â Peterson Rebecca

2. Date of Event Requiring Statement (Month/Day/Year)
07/30/2012

3. Issuer Name and Ticker or Trading Symbol
Alkermes plc. [ALKS]

(Last)

(First)

(Middle)

852 WINTER ST.

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

_____ Director	_____ 10% Owner
__X__ Officer (give title below)	_____ Other (specify below)
SVP, Corporate Communications

5. If Amendment, Date Original Filed(Month/Day/Year)

(Street)

WALTHAM,Â MAÂ 02451

6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

(City)

(State)

(Zip)

Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security
(Instr. 4)

2. Amount of Securities Beneficially Owned
(Instr. 4)

3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)

4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (Right to Buy)	12/10/2004⁽¹⁾	12/10/2013	Ordinary Shares	3,815	$ 12.16	D	Â
Employee Stock Option (Right to Buy)	07/12/2005⁽¹⁾	07/12/2014	Ordinary Shares	6,000	$ 12.3	D	Â
Employee Stock Option (Right to Buy)	12/09/2006⁽¹⁾	12/09/2015	Ordinary Shares	25,000	$ 18.6	D	Â
Employee Stock Option (Right to Buy)	05/02/2007⁽¹⁾	05/02/2016	Ordinary Shares	12,500	$ 20.79	D	Â
Employee Stock Option (Right to Buy)	06/01/2008⁽¹⁾	06/01/2017	Ordinary Shares	7,500	$ 15.95	D	Â
Employee Stock Option (Right to Buy)	11/05/2008⁽¹⁾	11/05/2017	Ordinary Shares	2,500	$ 14.13	D	Â
Employee Stock Option (Right to Buy)	05/27/2009⁽¹⁾	05/27/2018	Ordinary Shares	5,625	$ 12.29	D	Â
Employee Stock Option (Right to Buy)	05/26/2010⁽²⁾	05/26/2019	Ordinary Shares	11,110	$ 8.55	D	Â
Restricted Stock Unit Award	05/26/2010⁽³⁾	Â ⁽³⁾	Ordinary Shares	2,000	$ 0	D	Â
Employee Stock Option (Right to Buy)	11/18/2010⁽⁴⁾	11/18/2019	Ordinary Shares	7,500	$ 9.21	D	Â
Restricted Stock Unit Award	11/18/2010⁽⁵⁾	Â ⁽⁵⁾	Ordinary Shares	3,750	$ 0	D	Â
Employee Stock Option (Right to Buy)	05/17/2011⁽⁶⁾	05/17/2020	Ordinary Shares	31,500	$ 11.74	D	Â
Restricted Stock Unit Award	05/17/2011⁽⁷⁾	Â ⁽⁷⁾	Ordinary Shares	4,000	$ 0	D	Â
Employee Stock Option (Right to Buy)	05/20/2012⁽⁸⁾	05/20/2021	Ordinary Shares	35,000	$ 18.11	D	Â
Restricted Stock Unit Award	05/20/2012⁽⁹⁾	Â ⁽⁹⁾	Ordinary Shares	6,000	$ 0	D	Â
Employee Stock Option (Right to Buy)	05/21/2013⁽¹⁰⁾	05/21/2022	Ordinary Shares	75,000	$ 16.55	D	Â
Restricted Stock Unit Award	05/21/2013⁽¹¹⁾	Â ⁽¹¹⁾	Ordinary Shares	10,000	$ 0	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Peterson Rebecca 852 WINTER ST. WALTHAM,Â MAÂ 02451	Â	Â	Â SVP, Corporate Communications	Â

Signatures

/s/ Jennifer Baptiste, attorney-in-fact for Rebecca Peterson		07/31/2012
^**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These options are fully vested in accordance with their terms.
(2)	Vests in 4 equal annual installments commencing on 5/26/10.
(3)	Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing on 5/26/10.
(4)	Vests in 4 equal annual installments commencing on 11/18/10.
(5)	Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing on 11/18/10.
(6)	Vests in 4 equal annual installments commencing on 5/17/11.
(7)	Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing on 5/17/11.
(8)	Vests in 4 equal annual installments commencing on 5/20/12.
(9)	Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing on 5/20/12.
(10)	Vests in 4 equal annual installments commencing on 5/21/13.
(11)	Shares subject to the restricted stock unit award vest in equal annual installments over a four year period, commencing on 5/21/13.

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