    <SEC-DOCUMENT>0001104659-18-026876-index.html : 20180426
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    ACCESSION NUMBER:		0001104659-18-026876
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		20
    CONFORMED PERIOD OF REPORT:	20180426
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20180426
    DATE AS OF CHANGE:		20180426

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Alkermes plc.
    		CENTRAL INDEX KEY:			0001520262
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		IRS NUMBER:				981007018
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-35299
    		FILM NUMBER:		18776107

    	BUSINESS ADDRESS:
    		STREET 1:		CONNAUGHT HOUSE
    		STREET 2:		1 BURLINGTON ROAD
    		CITY:			DUBLIN 4
    		STATE:			L2
    		ZIP:			00000
    		BUSINESS PHONE:		00-353-1-772-8000

    	MAIL ADDRESS:
    		STREET 1:		CONNAUGHT HOUSE
    		STREET 2:		1 BURLINGTON ROAD
    		CITY:			DUBLIN 4
    		STATE:			L2
    		ZIP:			00000

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	ANTLER SCIENCE TWO PLC
    		DATE OF NAME CHANGE:	20110804

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Antler Science Two Ltd
    		DATE OF NAME CHANGE:	20110509
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    Document 1 - file: a18-12247_18k.htm

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    Document 2 - file: a18-12247_1ex99d1.htm

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    Document 3 - file: a18-12247_1ex99d2.htm

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    Document 4 - file: g122471moi001.gif

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    Document 5 - file: g122471moi002.gif

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    Document 6 - file: g122471moi003.gif

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    Document 7 - file: g122471moi004.gif

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    Document 8 - file: g122471moi005.gif

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    Document 9 - file: g122471moi006.gif

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    Document 11 - file: g122471moi008.gif

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    Document 12 - file: g122471moi009.gif

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    Document 13 - file: g122471moi010.gif

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    Document 14 - file: g122471moi011.gif

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    Document 16 - file: g122471moi013.gif

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    Document 17 - file: g122471moi014.gif

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    Document 19 - file: g122471moi016.gif

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