144 0001854086 XXXXXXXX LIVE 0001819928 DoubleVerify Holdings, Inc. 001-40349 233 Spring Street New York NY 10013 1-212-631-2111 Nicola Allais CFO Common Shares Goldman Sachs & Co. LLC 200 West Street New York NY 10282 36924 1238430.96 167403199 08/07/2023 NYSE Common Shares 08/07/2023 Compensation -- Non-Qualified Stock Option Issuer N 36924 08/07/2023 Compensation -- cashless exercise/same day sale N Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/18/2023 3077 122376.6 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/07/2023 3077 119777.15 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/06/2023 3077 117360.16 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/19/2023 3077 127377.65 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/06/2023 3077 117865.1 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/19/2023 3077 126153.92 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 06/27/2023 3077 115702.89 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 06/26/2023 3077 115229.03 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/18/2023 3077 122936.61 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/18/2023 3077 122761.84 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 06/27/2023 3077 116384.45 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 06/26/2023 3077 115325.65 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 06/26/2023 3077 114316.7 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/06/2023 3077 117540.17 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/07/2023 3077 119556.22 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/07/2023 3077 119907.31 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 06/27/2023 3077 115988.13 Nicola Allais 233 Spring Street New York NY 10013 Common Shares 07/19/2023 3077 126385.62 The sales of shares set forth herein are made in connection with a selling plan dated 3/23/2023 that is intended to comply with Rule 10b5-1(c). The representation below regarding the seller's knowledge of material information was true as of the date the selling plan was entered into. 08/07/2023 03/23/2023 Goldman Sachs & Co. LLC on behalf of Nicola Allais