X0609 4 2026-05-21 0001819928 DoubleVerify Holdings, Inc. DV 0001658502 Swidler Gary false C/O DOUBLEVERIFY HOLDINGS, INC. NEW YORK NY 10013 1 0 Common Stock 2026-05-21 4 M 0 14609 0 A 30174 D Restricted Stock Units 2026-05-21 4 M 0 14609 0 D 2026-05-21 Common Stock 14609 0 D Restricted Stock Units 2026-05-21 4 A 0 20000 0 A 2027-05-21 Common Stock 20000 20000 D Each restricted stock unit was granted on May 21, 2025 and represents a right to receive one share of common stock on a one-to-one basis. The restricted stock units fully vested on May 21, 2026. Restricted stock units convert into common stock on a one-for-one basis. Represents time-based restricted stock units granted on May 21, 2026 pursuant to the annual equity grant under DoubleVerify Holdings, Inc.'s non-employee director compensation program. The restricted stock units vest on the earlier of (i) May 21, 2027 and (ii) the date of DoubleVerify Holdings, Inc.'s 2027 Annual Meeting of Stockholders, subject to the reporting person's continued service. /s/ Andrew E. Grimmig, as Attorney-in-Fact for Gary Swidler 2026-05-22