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    CONFORMED SUBMISSION TYPE:	PRE 14A
    PUBLIC DOCUMENT COUNT:		54
    CONFORMED PERIOD OF REPORT:	20210614
    FILED AS OF DATE:		20210430
    DATE AS OF CHANGE:		20210430

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

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    		SEC ACT:		1934 Act
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    		FILM NUMBER:		21873932

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    		STREET 2:		1 BURLINGTON ROAD
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