<SEC-DOCUMENT>0001193125-24-059357-index.html : 20240305
<SEC-HEADER>0001193125-24-059357.hdr.sgml : 20240305
<ACCEPTANCE-DATETIME>20240305164402
ACCESSION NUMBER:		0001193125-24-059357
CONFORMED SUBMISSION TYPE:	PRE 14A
PUBLIC DOCUMENT COUNT:		6
CONFORMED PERIOD OF REPORT:	20240305
FILED AS OF DATE:		20240305
DATE AS OF CHANGE:		20240305

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MERRIMACK PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0001274792
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		PRE 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35409
		FILM NUMBER:		24721496

	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>PRE 14A
<SEQUENCE>1
<FILENAME>d780936dpre14a.htm
<DESCRIPTION>PRE 14A
<TEXT>
Document 1 - file: d780936dpre14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g780936g24k07.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g780936g24k07.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g780936g24k08.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g780936g24k08.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g780936g53j94.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g780936g53j94.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g780936g54l91.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g780936g54l91.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g780936g82c09.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g780936g82c09.jpg

</DOCUMENT>
</SEC-DOCUMENT>