Certain Restricted Stock Units of Integral Ad Science Holding Corp. are subject to a Lock-Up Agreement Ending on 3-FEB-2024. These Restricted Stock Units will be under lockup for 61 days starting from 4-DEC-2023 to 3-FEB-2024.

Details:
The Company and its officers, directors, and the selling stockholders have agreed that, without the prior written consent of the Representative, we and they will not, and will not publicly disclose an intention to or cause any affiliate to, during the period ending 60 days after the date of this prospectus