(Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q For the quarterly period ended June 30, 2026 PUBMATIC, INC. (Exact name of registrant as specified in its charter) or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from________to________ Commission File Number: 001-39748 Delaware (State or other jurisdiction o ...