<SEC-DOCUMENT>0001193805-18-000640-index.html : 20180510
<SEC-HEADER>0001193805-18-000640.hdr.sgml : 20180510
<ACCEPTANCE-DATETIME>20180510164936
ACCESSION NUMBER:		0001193805-18-000640
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20180508
FILED AS OF DATE:		20180510
DATE AS OF CHANGE:		20180510

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Flynn James E
		CENTRAL INDEX KEY:			0001352546

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35803
		FILM NUMBER:		18823672

	MAIL ADDRESS:	
		STREET 1:		780 THIRD AVENUE
		STREET 2:		37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Deerfield Mgmt L.P.
		CENTRAL INDEX KEY:			0001010823

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35803
		FILM NUMBER:		18823671

	BUSINESS ADDRESS:	
		STREET 1:		780 THIRD AVENUE
		STREET 2:		37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		2125511600

	MAIL ADDRESS:	
		STREET 1:		780 THIRD AVENUE
		STREET 2:		37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEERFIELD CAPITAL LP
		DATE OF NAME CHANGE:	20050930

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEERFIELD CAPITAL LP ET AL
		DATE OF NAME CHANGE:	19960318

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DEERFIELD PARTNERS, L.P.
		CENTRAL INDEX KEY:			0001301041
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35803
		FILM NUMBER:		18823669

	BUSINESS ADDRESS:	
		STREET 1:		780 THIRD AVENUE
		STREET 2:		37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		212-551-1600

	MAIL ADDRESS:	
		STREET 1:		780 THIRD AVENUE
		STREET 2:		37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEERFIELD PARTNERS, LP
		DATE OF NAME CHANGE:	20040819

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C)
		CENTRAL INDEX KEY:			0001009258
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35803
		FILM NUMBER:		18823670

	BUSINESS ADDRESS:	
		STREET 1:		780 THIRD AVENUE
		STREET 2:		37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		2125511600

	MAIL ADDRESS:	
		STREET 1:		780 THIRD AVENUE, 37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEERFIELD MANAGEMENT CO
		DATE OF NAME CHANGE:	20131114

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEERFIELD MANAGEMENT CO /NY
		DATE OF NAME CHANGE:	19981022

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Mallinckrodt plc
		CENTRAL INDEX KEY:			0001567892
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				981088325
		FISCAL YEAR END:			1229

	BUSINESS ADDRESS:	
		STREET 1:		3 LOTUS PARK, THE CAUSEWAY
		STREET 2:		STAINES-UPON-THAMES
		CITY:			SURREY
		STATE:			X0
		ZIP:			TW18 3AG
		BUSINESS PHONE:		44-017-8463-6700

	MAIL ADDRESS:	
		STREET 1:		3 LOTUS PARK, THE CAUSEWAY
		STREET 2:		STAINES-UPON-THAMES
		CITY:			SURREY
		STATE:			X0
		ZIP:			TW18 3AG
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>e617984_3-mallinckrodt.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
Document 1 - file: e617984_3-mallinckrodt.html

Document 1 - RAW XML: e617984_3-mallinckrodt.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>2
<FILENAME>e617984_ex99.htm
<TEXT>
Document 2 - file: e617984_ex99.htm

</DOCUMENT>
</SEC-DOCUMENT>