X0306 4 2022-09-30 0 0001422930 PubMatic, Inc. PUBM 0001833465 Pantelick Steven C/O PUBMATIC, INC. 601 MARSHALL STREET REDWOOD CITY CA 94063 0 1 0 0 Chief Financial Officer Class A Common Stock 2022-09-30 4 M 0 2261 0.00 A 26062 D Class A Common Stock 2022-10-01 4 M 0 5056 0.00 A 31118 D Restricted Stock Unit 0.00 2022-09-30 4 M 0 2261 0.00 D Class A Common Stock 2261 20348 D Restricted Stock Unit 0.00 2022-10-01 4 M 0 5056 0.00 D Class A Common Stock 5056 65734 D Class B Common Stock 0.00 Class A Common Stock 467360 467360 D Class B Common Stock 0.00 Class A Common Stock 115000 115000 I By spouse Includes 2,500 and 1,250 shares of the Issuer's Class A common stock issued to the Reporting Person pursuant to the Issuer's employee stock purchase plan on May 28, 2021 and May 31, 2022, respectively. Each restricted stock unit ("RSU") represents a right to receive one share of the Issuer's Class A Common Stock at the time of vesting for no consideration. The RSUs vested as to 1/8 of the total shares on June 30, 2021, and 1/16th of the total shares vest quarterly thereafter, subject to the Reporting Person's provision of service to the Issuer on each vesting date. RSUs do not expire; they either vest or are canceled prior to the vesting date. The RSUs vested as to 1/16th of the total shares on April 1, 2022, and 1/16th of the total shares vest quarterly thereafter, subject to the Reporting Person's provision of service to the Issuer on each vesting date. Each share of Class B common stock held by the Issuer's executive officers, directors and their respective affiliates will convert automatically into one share of Class A common stock upon any transfer, except for certain permitted transfers. /s/ Thomas Chow, Attorney-in-Fact 2022-10-04