X0407 4 2023-06-01 0 0001819928 DoubleVerify Holdings, Inc. DV 0001550028 Desmond Laura C/O DOUBLEVERIFY HOLDINGS, INC. 462 BROADWAY NEW YORK NY 10013 1 0 0 0 0 Restricted Stock Units 2023-06-01 4 M 0 9183 0.00 D 2023-06-01 Common Stock 9183 0 I By Trust Restricted stock units convert into common stock on a one-for-one basis. As reported previously, the reporting person made an election under the Issuer's deferred compensation plan to defer delivery of the vested shares to the earlier of (i) March 2027 and (ii) the reporting person's end of service as a Director (in which case the shares will be delivered in five annual installments commencing in the year of termination). Each restricted stock unit ("RSU") was granted on June 15, 2022 and represents a right to receive one share of common stock on a one-to-one basis. The RSUs fully vested on June 1, 2023. Represents restricted stock units held by the Laura B. Desmond Revocable Trust for which Ms. Desmond is trustee. /s/ Andrew E. Grimmig, as Attorney-in-Fact for Laura B. Desmond 2023-06-05