0001562180-22-005475.txt : 20220705 0001562180-22-005475.hdr.sgml : 20220705 20220705160946 ACCESSION NUMBER: 0001562180-22-005475 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20220701 FILED AS OF DATE: 20220705 DATE AS OF CHANGE: 20220705 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: 221064938 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 2022-07-01 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 2022-07-01 4 M false 62292.00 7.20 A 80128.00 D Common Stock 2022-07-01 4 S false 62292.00 18.9981 D 17836.00 D Stock Options (Right to buy) 7.20 2022-07-01 4 M false 62292.00 0.00 D 2025-06-30 Common Stock 62292.00 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 1,200,616 options to purchase shares of common stock that are vested and immediately exercisable and a total of 397,792 options to purchase shares of common stock that have not yet vested. The sale prices ranged from $18.61 to $19.38 This option is fully vested. /s/ Michael A. Metzger, Attorney-in-fact 2022-07-05