Certain Restricted Stock Units of HilleVax, Inc. are subject to a Lock-Up Agreement Ending on 19-DEC-2023. These Restricted Stock Units will be under lockup for 91 days starting from 19-SEP-2023 to 19-DEC-2023.

Details:
Directors, executive officers and one of significant stockholders (collectively, the lock-up parties) have entered into lock-up agreements with the underwriters prior to the commencement of this offering pursuant to which each lock-up party, with limited exceptions, for a period of 90 days after the date of this prospectus supplement (such period, the restricted period), may not (and may not cause any of their direct or indirect affiliates to), without the prior written consent of J.P. Morgan Securities LLC and Leerink Partners LLC