X0202 SCHEDULE 13G/A 0000104889-25-000038 0000104889 XXXXXXXX LIVE 2 Class A Common Stock, par value $0.0001 per share 03/31/2026 0001422930 PubMatic, Inc. 74467Q103 601 Marshall Street Redwood City CA 94063 Rule 13d-1(c) Graham Holdings Company DE 3398904.00 0.00 3398904.00 0.00 3398904.00 N 8.9 CO In reference to #11, the percentage ownership is calculated based upon an aggregate of 38,180,751 shares of Class A common stock outstanding as of April 30, 2026, as reported in PubMatic, Inc.'s Form 10-Q filed on May 7, 2026. PubMatic, Inc. 601 Marshall Street, Redwood City, California, 94063 Graham Holdings Company 1812 North Moore Street, Suite 2100, Arlington, VA 22209 Graham Holdings Company is incorporated in the State of Delaware. Y 3,398,904 8.9% 3,398,904 0 3,398,904 0 Y N Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Graham Holdings Company /s/ Nicole Maddrey Nicole Maddrey, Senior Vice President, Secretary, General Counsel 05/15/2026