X0306 4 2022-08-08 0 0001819928 DoubleVerify Holdings, Inc. DV 0001854079 Grimmig Andrew E C/O DOUBLEVERIFY HOLDINGS, INC. 160 VARICK STREET, SUITE 03-120 NEW YORK NY 10013 0 1 0 0 Chief Legal Officer Common Stock 2022-08-08 4 M 0 125000 6.45 A 155183 D Common Stock 2022-08-08 4 S 0 96296 26.4759 D 58887 D Options (Rights to Buy) 6.45 2022-08-08 4 M 0 125000 0.00 D 2021-11-22 2030-04-27 Common Stock 125000 316173 D Includes 76,296 shares sold to satisfy tax obligations and exercise price in connection with the exercise of 125,000 stock options on August 8, 2022. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $25.99 to $26.74, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. Represents non-qualified stock options granted on April 27, 2020 that vested on November 22, 2021 upon Providence VII U.S. Holdings L.P. receiving cumulative cash proceeds in respect of its investment in the Issuer equal to two times its aggregate cash investment in the Issuer. /s/ Andrew E. Grimmig 2022-08-10