0001950047-25-005995.txt : 20250818 0001950047-25-005995.hdr.sgml : 20250818 20250818163639 ACCESSION NUMBER: 0001950047-25-005995 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20250818 DATE AS OF CHANGE: 20250818 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: Syndax Pharmaceuticals Inc CENTRAL INDEX KEY: 0001395937 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences EIN: 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: 251228393 BUSINESS ADDRESS: STREET 1: 730 THIRD AVENUE STREET 2: 9TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10017 BUSINESS PHONE: 781-419-1400 MAIL ADDRESS: STREET 1: 730 THIRD AVENUE STREET 2: 9TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10017 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Podlesak Dennis CENTRAL INDEX KEY: 0001314595 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: C/O PENINSULA PHARMACEUTICALS, INC. STREET 2: 1751 HARBOR BAY PARKWAY CITY: ALAMEDA STATE: CA ZIP: 94502 144 1 primary_doc.xml 144 0001314595 XXXXXXXX LIVE 0001395937 Syndax Pharmaceuticals, Inc. 001-37708 730 Third Avenue, 9th Floor New York NY 10017 7814191400 DENNIS G PODLESAK Director Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

14400 226656.00 86141862 08/18/2025 NASDAQ Common 08/18/2025 Exercise of Stock Options Issuer N 14400 08/18/2025 Cash N 10b5-1 Sales for DENNIS G PODLESAK

730 Third Avenue, 9th Floor New York NY 10017

Common 08/15/2025 19200 298408.32 10b5-1 Sales for DENNIS G PODLESAK

730 Third Avenue, 9th Floor New York NY 10017

Common 08/14/2025 19200 272520.48 08/18/2025 03/05/2025 /s/ DENNIS G PODLESAK