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    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		41
    CONFORMED PERIOD OF REPORT:	20230109
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20230109
    DATE AS OF CHANGE:		20230109

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

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    		SEC ACT:		1934 Act
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    		STREET 1:		CONNAUGHT HOUSE
    		STREET 2:		1 BURLINGTON ROAD
    		CITY:			DUBLIN 4
    		STATE:			L2
    		ZIP:			00000
    		BUSINESS PHONE:		00-353-1-772-8000

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    		STREET 2:		1 BURLINGTON ROAD
    		CITY:			DUBLIN 4
    		STATE:			L2
    		ZIP:			00000

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