<SEC-DOCUMENT>0000899243-22-024972-index.html : 20220705
<SEC-HEADER>0000899243-22-024972.hdr.sgml : 20220705
<ACCEPTANCE-DATETIME>20220705160600
ACCESSION NUMBER:		0000899243-22-024972
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20220630
FILED AS OF DATE:		20220705
DATE AS OF CHANGE:		20220705

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Newtyn Management, LLC
		CENTRAL INDEX KEY:			0001569241
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35409
		FILM NUMBER:		221064851

	BUSINESS ADDRESS:	
		STREET 1:		60 EAST 42ND STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165
		BUSINESS PHONE:		212-446-2465

	MAIL ADDRESS:	
		STREET 1:		60 EAST 42ND STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			NEWTYN PARTNERS, LP
		CENTRAL INDEX KEY:			0001548707
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35409
		FILM NUMBER:		221064850

	BUSINESS ADDRESS:	
		STREET 1:		60 EAST 42ND STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165
		BUSINESS PHONE:		212-446-2465

	MAIL ADDRESS:	
		STREET 1:		60 EAST 42ND STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			NEWTYN TE PARTNERS, LP
		CENTRAL INDEX KEY:			0001548709
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35409
		FILM NUMBER:		221064849

	BUSINESS ADDRESS:	
		STREET 1:		60 EAST 42ND STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165
		BUSINESS PHONE:		212-446-2465

	MAIL ADDRESS:	
		STREET 1:		60 EAST 42ND STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ledo Capital, LLC
		CENTRAL INDEX KEY:			0001789647
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35409
		FILM NUMBER:		221064847

	BUSINESS ADDRESS:	
		STREET 1:		60 EAST 42ND STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165
		BUSINESS PHONE:		212-446-2460

	MAIL ADDRESS:	
		STREET 1:		60 EAST 42ND STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Levy Noah G.
		CENTRAL INDEX KEY:			0001788608

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35409
		FILM NUMBER:		221064852

	MAIL ADDRESS:	
		STREET 1:		60 EAST 42ND ST, 9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Newtyn Capital Partners, LP
		CENTRAL INDEX KEY:			0001789643
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35409
		FILM NUMBER:		221064848

	BUSINESS ADDRESS:	
		STREET 1:		60 EAST 42ND STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165
		BUSINESS PHONE:		212-446-2460

	MAIL ADDRESS:	
		STREET 1:		60 EAST 42ND STREET
		STREET 2:		9TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10165

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MERRIMACK PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0001274792
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE BROADWAY
		STREET 2:		14TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		617-441-1000

	MAIL ADDRESS:	
		STREET 1:		ONE BROADWAY
		STREET 2:		14TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
Document 1 - file: doc4.html

Document 1 - RAW XML: doc4.xml

</DOCUMENT>
</SEC-DOCUMENT>