X0306 4 2021-11-22 0 0001819928 DoubleVerify Holdings, Inc. DV 0001854086 Allais Nicola T C/O DOUBLEVERIFY HOLDINGS, INC. 233 SPRING STREET NEW YORK NY 10013 0 1 0 0 Chief Financial Officer Options (Rights to Buy) 2.01 2021-11-22 4 A 0 801883 0.00 A 2021-11-22 2028-01-04 Common Stock 801883 801883 D Represents non-qualified stock options granted on January 4, 2018 that vested on November 22, 2021 upon Providence VII U.S. Holdings L.P. receiving cumulative cash proceeds in respect of its investment in DoubleVerify Holdings, Inc. (the "Company") equal to two times its aggregate cash investment in the Company. /s/ Andrew E. Grimmig, as Attorney-in-Fact for Nicola T. Allais 2021-11-24