<SEC-DOCUMENT>0000950170-23-066397-index.html : 20240109
<SEC-HEADER>0000950170-23-066397.hdr.sgml : 20240109
<ACCEPTANCE-DATETIME>20231128160505
<PRIVATE-TO-PUBLIC>
ACCESSION NUMBER:		0000950170-23-066397
CONFORMED SUBMISSION TYPE:	CORRESP
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20231128

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Syndax Pharmaceuticals Inc
		CENTRAL INDEX KEY:			0001395937
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				320162505
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		CORRESP

	BUSINESS ADDRESS:	
		STREET 1:		35 GATEHOUSE DRIVE
		STREET 2:		BUILDING D, FLOOR 3
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
		BUSINESS PHONE:		781-419-1400

	MAIL ADDRESS:	
		STREET 1:		35 GATEHOUSE DRIVE
		STREET 2:		BUILDING D, FLOOR 3
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
</SEC-HEADER>
<DOCUMENT>
<TYPE>CORRESP
<SEQUENCE>1
<FILENAME>filename1.htm
<TEXT>
Document 1 - file: filename1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>img48831280_0.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: img48831280_0.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>img48831280_1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: img48831280_1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>img48831280_2.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: img48831280_2.jpg

</DOCUMENT>
</SEC-DOCUMENT>