0001562180-23-001117.txt : 20230208 0001562180-23-001117.hdr.sgml : 20230208 20230208164908 ACCESSION NUMBER: 0001562180-23-001117 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230206 FILED AS OF DATE: 20230208 DATE AS OF CHANGE: 20230208 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: 23599766 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 X0306 4 2023-02-06 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 true false false President, Head of R&D Common Stock 2023-02-06 4 M false 52854.00 6.38 A 70690.00 D Common Stock 2023-02-06 4 S false 52854.00 26.8269 D 17836.00 D Stock Options (Right to buy) 6.38 2023-02-06 4 M false 52854.00 0.00 D 2029-02-06 Common Stock 52854.00 0.00 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Person. Following the sales reported in this Form 4, the Reporting Person has a total of 811,146 options to purchase shares of common stock that are vested and immediately exercisable and a total of 313,000 options to purchase shares of common stock that have not yet vested. The sale prices ranged from $26.49 to $27.91. This option is fully vested. /s/ Michael A. Metzger, Attorney-in-fact 2023-02-08