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    ACCESSION NUMBER:		0001193125-24-048135
    CONFORMED SUBMISSION TYPE:	S-3ASR
    PUBLIC DOCUMENT COUNT:		11
    FILED AS OF DATE:		20240227
    DATE AS OF CHANGE:		20240227
    EFFECTIVENESS DATE:		20240227

    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:		S-3ASR
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-277424
    		FILM NUMBER:		24688741

    	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
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    Document 2 - file: d769699dex46.htm

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    Document 3 - file: d769699dex48.htm

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    <DESCRIPTION>EX-4.9
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    Document 4 - file: d769699dex49.htm

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    <DESCRIPTION>EX-23.1
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