0001959173-23-002843.txt : 20230802 0001959173-23-002843.hdr.sgml : 20230802 20230802182608 ACCESSION NUMBER: 0001959173-23-002843 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20230802 DATE AS OF CHANGE: 20230802 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: Syndax Pharmaceuticals Inc CENTRAL INDEX KEY: 0001395937 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 320162505 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-37708 FILM NUMBER: 231137430 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 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Meury William CENTRAL INDEX KEY: 0001536778 FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: C/O FOREST LABORATORIES, INC. STREET 2: 909 THIRD AVENUE CITY: NEW YORK STATE: NY ZIP: 10022 144 1 primary_doc.xml 144 0001536778 XXXXXXXX LIVE 0001395937 Syndax Pharmaceuticals Inc 001-37708 35 GATEHOUSE DRIVE BUILDING D, FLOOR 3 WALTHAM MA 02451 781-419-1400 Meury William Director Common Fidelity Brokerage Services LLC

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83000 1697811.14 68821277 08/02/2023 NASDAQ Common 08/02/2023 Option Granted - 09/25/2018 Issuer N 35000 08/02/2023 Cash Common 08/02/2023 Option Granted - 06/10/2019 Issuer N 24000 08/02/2023 Cash Common 08/02/2023 Option Granted - 02/12/2020 Issuer N 24000 08/02/2023 Cash Y 08/02/2023 05/03/2023 /s/ Jodi Disselkamp, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for William J. Meury