<SEC-DOCUMENT>0001567892-22-000018-index.html : 20220526
<SEC-HEADER>0001567892-22-000018.hdr.sgml : 20220526
<ACCEPTANCE-DATETIME>20220526170331
ACCESSION NUMBER:		0001567892-22-000018
CONFORMED SUBMISSION TYPE:	SD
PUBLIC DOCUMENT COUNT:		2
<RULE>
<RULE-NAME>13p-1
<ITEM>
<ITEM-NUMBER>1.01
<ITEM-PERIOD>20211231
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<ITEM>
<ITEM-NUMBER>1.02
<ITEM-PERIOD>20211231
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FILED AS OF DATE:		20220526
DATE AS OF CHANGE:		20220526

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Mallinckrodt plc
		CENTRAL INDEX KEY:			0001567892
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				981088325
		FISCAL YEAR END:			1230

	FILING VALUES:
		FORM TYPE:		SD
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35803
		FILM NUMBER:		22971155

	BUSINESS ADDRESS:	
		STREET 1:		COLLEGE BUSINESS & TECHNOLOGY PARK
		STREET 2:		CRUISERATH, BLANCHARDSTOWN
		CITY:			DUBLIN 15
		STATE:			L2
		ZIP:			D15
		BUSINESS PHONE:		353 1 6960000

	MAIL ADDRESS:	
		STREET 1:		COLLEGE BUSINESS & TECHNOLOGY PARK
		STREET 2:		CRUISERATH, BLANCHARDSTOWN
		CITY:			DUBLIN 15
		STATE:			L2
		ZIP:			D15
</SEC-HEADER>
<DOCUMENT>
<TYPE>SD
<SEQUENCE>1
<FILENAME>formsd-mnkx12312021.htm
<DESCRIPTION>SD
<TEXT>
Document 1 - file: formsd-mnkx12312021.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1.01
<SEQUENCE>2
<FILENAME>exhibit101-cmr2021.htm
<DESCRIPTION>EX-1.01
<TEXT>
Document 2 - file: exhibit101-cmr2021.htm

</DOCUMENT>
</SEC-DOCUMENT>