<SEC-DOCUMENT>0001193125-26-266027-index.html : 20260610 <SEC-HEADER>0001193125-26-266027.hdr.sgml : 20260610 <ACCEPTANCE-DATETIME>20260610170443 ACCESSION NUMBER: 0001193125-26-266027 CONFORMED SUBMISSION TYPE: 8-K PUBLIC DOCUMENT COUNT: 19 CONFORMED PERIOD OF REPORT: 20260610 ITEM INFORMATION: Entry into a Material Definitive Agreement ITEM INFORMATION: Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant ITEM INFORMATION: Unregistered Sales of Equity Securities ITEM INFORMATION: Financial Statements and Exhibits FILED AS OF DATE: 20260610 DATE AS OF CHANGE: 20260610 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Syndax Pharmaceuticals Inc CENTRAL INDEX KEY: 0001395937 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences EIN: 320162505 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 8-K SEC ACT: 1934 Act SEC FILE NUMBER: 001-37708 FILM NUMBER: 261080530 BUSINESS ADDRESS: STREET 1: 730 THIRD AVENUE STREET 2: 9TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10017 BUSINESS PHONE: 781-419-1400 MAIL ADDRESS: STREET 1: 730 THIRD AVENUE STREET 2: 9TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10017 </SEC-HEADER> <DOCUMENT> <TYPE>8-K <SEQUENCE>1 <FILENAME>d105044d8k.htm <DESCRIPTION>8-K <TEXT> Document 1 - file: d105044d8k.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-4.1 <SEQUENCE>2 <FILENAME>d105044dex41.htm <DESCRIPTION>EX-4.1 <TEXT> Document 2 - file: d105044dex41.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-4.2 <SEQUENCE>3 <FILENAME>d105044dex42.htm <DESCRIPTION>EX-4.2 <TEXT> Document 3 - file: d105044dex42.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.SCH <SEQUENCE>4 <FILENAME>sndx-20260610.xsd <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA <TEXT> Document 4 - file: sndx-20260610.xsd
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.LAB <SEQUENCE>5 <FILENAME>sndx-20260610_lab.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE <TEXT> Document 5 - file: sndx-20260610_lab.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.PRE <SEQUENCE>6 <FILENAME>sndx-20260610_pre.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE <TEXT> Document 6 - file: sndx-20260610_pre.xml
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>7 <FILENAME>g105044dsp106.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 7 - file: g105044dsp106.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>8 <FILENAME>g105044dsp107.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 8 - file: g105044dsp107.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>9 <FILENAME>g105044g0610075651996.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 9 - file: g105044g0610075651996.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>10 <FILENAME>g105044g0610075652506.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 10 - file: g105044g0610075652506.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>11 <FILENAME>g105044g0610075652686.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 11 - file: g105044g0610075652686.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>12 <FILENAME>g105044g0610075652876.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 12 - file: g105044g0610075652876.jpg
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>14 <FILENAME>R1.htm <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 14 - file: R1.htm
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>15 <FILENAME>report.css <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 15 - file: report.css
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>16 <FILENAME>Show.js <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 16 - file: Show.js
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>18 <FILENAME>FilingSummary.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 18 - file: FilingSummary.html
Document 18 - RAW XML: FilingSummary.xml
</DOCUMENT> <DOCUMENT> <TYPE>JSON <SEQUENCE>21 <FILENAME>MetaLinks.json <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 21 - file: MetaLinks.json
</DOCUMENT> <DOCUMENT> <TYPE>ZIP <SEQUENCE>22 <FILENAME>0001193125-26-266027-xbrl.zip <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 22 - file: 0001193125-26-266027-xbrl.zip
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>23 <FILENAME>d105044d8k_htm.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 23 - file: d105044d8k_htm.html
Document 23 - RAW XML: d105044d8k_htm.xml
</DOCUMENT> </SEC-DOCUMENT>