<SEC-DOCUMENT>0000899140-21-000485-index.html : 20210510
<SEC-HEADER>0000899140-21-000485.hdr.sgml : 20210510
<ACCEPTANCE-DATETIME>20210510170355
ACCESSION NUMBER:		0000899140-21-000485
CONFORMED SUBMISSION TYPE:	SC 13D
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20210510
DATE AS OF CHANGE:		20210510
GROUP MEMBERS:		ALEXANDER J. DENNER, PH.D.

SUBJECT COMPANY:	

	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:		SC 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-86627
		FILM NUMBER:		21908245

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Sarissa Capital Management LP
		CENTRAL INDEX KEY:			0001577524
		IRS NUMBER:				900924432
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D

	BUSINESS ADDRESS:	
		STREET 1:		660 STEAMBOAT ROAD
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		203-302-2330

	MAIL ADDRESS:	
		STREET 1:		660 STEAMBOAT ROAD
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D
<SEQUENCE>1
<FILENAME>s42631058a.htm
<DESCRIPTION>SCHEDULE 13D
<TEXT>
Document 1 - file: s42631058a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-2
<SEQUENCE>2
<FILENAME>s42631058b.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
Document 2 - file: s42631058b.htm

</DOCUMENT>
</SEC-DOCUMENT>