0001562180-22-006706.txt : 20220916 0001562180-22-006706.hdr.sgml : 20220916 20220916173418 ACCESSION NUMBER: 0001562180-22-006706 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20220914 FILED AS OF DATE: 20220916 DATE AS OF CHANGE: 20220916 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: 221248903 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 2022-09-14 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 2022-09-14 4 M false 87645.00 7.20 A 105481.00 D Common Stock 2022-09-14 4 S false 87645.00 23.7989 D 17836.00 D Common Stock 2022-09-15 4 M false 66775.00 7.20 A 84611.00 D Common Stock 2022-09-15 4 S false 66775.00 24.2012 D 17836.00 D Common Stock 2022-09-16 4 M false 71966.00 7.20 A 89802.00 D Common Stock 2022-09-16 4 S false 71966.00 23.2195 D 17836.00 D Common Stock 2022-09-16 4 M false 53034.00 10.90 A 70870.00 D Common Stock 2022-09-16 4 S false 53034.00 23.2195 D 17836.00 D Stock Options (Right to buy) 7.20 2022-09-14 4 M false 87645.00 0.00 D 2025-06-30 Common Stock 87645.00 0.00 D Stock Options (Right to buy) 7.20 2022-09-15 4 M false 66775.00 0.00 D 2025-06-30 Common Stock 66775.00 0.00 D Stock Options (Right to buy) 10.90 2022-09-16 4 M false 53034.00 0.00 D 2025-09-09 Common Stock 53034.00 0.00 D Stock Options (Right to buy) 7.20 2022-09-16 4 M false 71966.00 0.00 D 2025-06-30 Common Stock 71966.00 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 948,946 options to purchase shares of common stock that are vested and immediately exercisable and a total of 245,042 options to purchase shares of common stock that have not yet vested. The sale prices ranged from $23.36 to $24.01 The sale prices ranged from $23.36 to $24.64 The sale prices ranged from $22.96 to $23.99 This option is fully vested. /s/ Michael A. Metzger, Attorney-in-fact 2022-09-16