X0306 4/A 2022-06-15 2022-06-17 0 0001819928 DoubleVerify Holdings, Inc. DV 0001459490 Turner Kelli C/O DOUBLEVERIFY HOLDINGS, INC. 462 BROADWAY NEW YORK NY 10013 1 0 0 0 Restricted Stock Units 2022-06-15 4 A 0 9183 0.00 A 2023-06-01 Common Stock 9183 9183 D Restricted stock units convert into common stock on a one-for-one basis. Represents time-based restricted stock units granted on June 15, 2022 pursuant to the annual equity grant under DoubleVerify Holdings, Inc.'s non-employee director compensation program. The restricted stock units vest on June 1, 2023, subject to Ms. Turner's continued services. The Form 4, as originally filed, inadvertently failed to note that the reporting person made an election under the Issuer's deferred compensation plan to defer delivery of the vested shares to 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). /s/ Andrew E. Grimmig, as Attorney-in-Fact for Kelli Turner 2023-01-27