<SEC-DOCUMENT>0001103804-15-000050-index.html : 20150831
<SEC-HEADER>0001103804-15-000050.hdr.sgml : 20150831
<ACCEPTANCE-DATETIME>20150831152737
ACCESSION NUMBER:		0001103804-15-000050
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20150831
DATE AS OF CHANGE:		20150831

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Mallinckrodt plc
		CENTRAL INDEX KEY:			0001567892
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				981088325
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-87833
		FILM NUMBER:		151084749

	BUSINESS ADDRESS:	
		STREET 1:		DAMASTOWN
		STREET 2:		MULHUDDART
		CITY:			DUBLIN
		STATE:			L2
		ZIP:			15
		BUSINESS PHONE:		353 1 8808180

	MAIL ADDRESS:	
		STREET 1:		DAMASTOWN
		STREET 2:		MULHUDDART
		CITY:			DUBLIN
		STATE:			L2
		ZIP:			15

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VIKING GLOBAL INVESTORS LP
		CENTRAL INDEX KEY:			0001103804
		IRS NUMBER:				134055118
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		55 RAILROAD AVENUE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		203-863-5062

	MAIL ADDRESS:	
		STREET 1:		55 RAILROAD AVENUE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>v13gMallinckrodt.txt
<TEXT>
Document 1 - file: v13gMallinckrodt.txt

</DOCUMENT>
</SEC-DOCUMENT>