144 0001831271 XXXXXXXX LIVE 0001819928 DoubleVerify Holdings, Inc. 001-40349 462 Broadway New York NY 10013 212-631-2111 Providence Butternut Co-Investment L.P. 10% Stockholder Common Stock J.P. Morgan Securities LLC

383 Madison Avenue, 5th Floor New York NY 10179

51230 757691.70 163628379 09/09/2025 NYSE Series A Preferred Stock 11/18/2020 Received Series A Preferred Stock from the Issuer in a financing transaction. The Series A Preferred Stock was converted into Common Stock in connection with the issuer's initial public offering. Issuer - DoubleVerify Holdings, Inc. N 581014 11/18/2020 Cash Y Number of Shares or Other Units To Be Sold: Represents shares of common stock being distributed by the Reporting Person to its equity holders in a pro rata distribution-in-kind, all of which will be eligible for sale by such equity holders pursuant to Rule 144 immediately following the distribution. Number of Shares or Other Units Outstanding: Reflects DoubleVerify Holdings, Inc. (DV) closing price on NYSE as of 9/9/2025. Amount of Securities Acquired: Reflects conversion of Series A Preferred Stock into Common Stock and the Issuer's 1-for-3 reverse stock split on March 29, 2021. 09/09/2025 /s/ Sarah Conde as GC of Providence Equity VIIA International Ltd, GP of Providence Equity GP VIIA LP, GP of Providence Butternut Co-Investment LP