0001562180-23-005845.txt : 20230711 0001562180-23-005845.hdr.sgml : 20230711 20230711092319 ACCESSION NUMBER: 0001562180-23-005845 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230710 FILED AS OF DATE: 20230711 DATE AS OF CHANGE: 20230711 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Morrison Briggs CENTRAL INDEX KEY: 0001654430 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-37708 FILM NUMBER: 231081310 MAIL ADDRESS: STREET 1: C/O SYNDAX PHARMACEUTICALS, INC. STREET 2: 400 TOTTEN POND ROAD, SUITE 110 CITY: WALTHAM STATE: MA ZIP: 02451 ISSUER: 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 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 4 1 primarydocument.xml PRIMARY DOCUMENT X0407 4 2023-07-10 false 0001395937 Syndax Pharmaceuticals Inc SNDX 0001654430 Morrison Briggs C/O SYNDAX PHARMACEUTICALS, INC. 35 GATEHOUSE DRIVE, BUILDING D, FLOOR 3 WALTHAM MA 02451 true false false false true Common Stock 2023-07-10 4 M false 52855.00 8.77 A 70691.00 D Common Stock 2023-07-10 4 S false 52855.00 20.3967 D 17836.00 D Stock Options (Right to buy) 8.77 2023-07-10 4 M false 52855.00 0.00 D 2027-02-06 Common Stock 52855.00 0.00 D Following the sales reported in this Form 4, the Reporting Person has a total of 601,143 options to purchase shares of common stock that are vested and immediately exercisable and a total of 258,729 options to purchase shares of common stock that have not yet vested. The sale prices ranged from $20.11 to $20.71. This option is fully vested. /s/ Michael A. Metzger, Attorney-in-fact 2023-07-11