Certain Pre-Funded Warrants of Syndax Pharmaceuticals, Inc. are subject to a Lock-Up Agreement Ending on 13-FEB-2024. These Pre-Funded Warrants will be under lockup for 61 days starting from 14-DEC-2023 to 13-FEB-2024.

Details:
The directors and executive officers have entered into lock-up agreements with the underwriters prior to the commencement of this offering pursuant to which we and each of these persons for a period of 60 days, after the date of this prospectus supplement.