X0508 4 2025-09-15 0001819928 DoubleVerify Holdings, Inc. DV 0001853942 Eddleman Julie C/O DOUBLEVERIFY HOLDINGS, INC. 462 BROADWAY NEW YORK NY 10013 1 Global Chief Comm. Officer 0 Common Stock 2025-09-15 4 M 0 5073 0 A 214403 D Common Stock 2025-09-15 4 F 0 2174 13.01 D 212229 D Common Stock 2025-09-15 4 M 0 1071 0 A 213300 D Common Stock 2025-09-15 4 F 0 459 13.01 D 212841 D Common Stock 2025-09-15 4 M 0 3034 0 A 215875 D Common Stock 2025-09-15 4 F 0 1301 13.01 D 214574 D Common Stock 2025-09-15 4 M 0 3437 0 A 218011 D Common Stock 2025-09-15 4 F 0 1473 13.01 D 216538 D Common Stock 2025-09-15 4 M 0 1991 0 A 218529 D Common Stock 2025-09-15 4 F 0 854 13.01 D 217675 D Restricted Stock Units 2025-09-15 4 M 0 5073 0 D Common Stock 5073 65949 D Performance Stock Units 2025-09-15 4 M 0 1071 0 D Common Stock 1071 5361 D Restricted Stock Units 2025-09-15 4 M 0 3034 0 D Common Stock 3034 27306 D Restricted Stock Units 2025-09-15 4 M 0 3437 0 D Common Stock 3437 17185 D Restricted Stock Units 2025-09-15 4 M 0 1991 0 D Common Stock 1991 1991 D Each restricted stock unit was granted on March 13, 2025. 6.25% of the restricted stock units vested and were settled on March 15, 2025 (the "2025 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2025 Vesting Date. Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units. Each performance stock unit was granted on December 19, 2023. 41.67% of the earned shares vested and were settled on the 2025 Vesting Date, and the remainder of the earned shares vest at a rate of 8.33% on each quarterly anniversary of the 2025 Vesting Date. Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of performance stock units. Each restricted stock unit was granted on December 19, 2023. 6.25% of the restricted stock units vested and were settled on March 15, 2024 (the "2024 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2024 Vesting Date. Each restricted stock unit was granted on December 12, 2022. 6.25% of the restricted stock units vested and were settled on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date. Each restricted stock unit was granted on December 10, 2021. 6.25% of the restricted stock units vested and were settled on March 15, 2022 (the "2022 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2022 Vesting Date. Restricted stock units convert into common stock on a one-for-one basis. Performance stock units convert into common stock on a one-for-one basis. /s/ Andrew E. Grimmig, as Attorney-in-Fact for Julie F. Eddleman 2025-09-17