X0306 4 2021-04-20 0 0001819928 DoubleVerify Holdings, Inc. DV 0001853942 Eddleman Julie C/O DOUBLEVERIFY HOLDINGS, INC. 233 SPRING STREET NEW YORK NY 10013 0 1 0 0 Global Chief Comm. Officer Common Stock 2021-04-20 4 M 0 65721 A 65721 D Restricted Stock Units 2021-04-20 4 M 0 65721 0.00 D Common Stock 65721 197161 D Each restricted stock unit ("RSU") was granted on January 28, 2021 and represents a right to receive one share of common stock on a one-to-one basis. 25% of the RSUs vested and were settled on April 20, 2021, upon the initial public offering (the "IPO") of common stock of DoubleVerify Holdings, Inc. The remaining RSUs will vest on the original vesting schedule as though the IPO had not occurred, subject to Ms. Eddleman's continued employment through the applicable vesting date. Restricted stock units convert into common stock on a one-for-one basis. /s/ Andrew E. Grimmig, as Attorney-in-Fact for Julie Eddleman 2021-05-07