X0306 4 2023-02-15 0 0001422930 PubMatic, Inc. PUBM 0001844595 van der Zweep Michael C/O PUBMATIC, INC. 601 MARSHALL STREET REDWOOD CITY CA 94063 0 1 0 0 Controller Class A Common Stock 2023-02-15 4 M 0 502 0.00 A 1592 D Class A Common Stock 2023-02-16 4 S 0 219 16.9495 D 1373 D Restricted Stock Unit 2023-02-15 4 M 0 69 0.00 D Class A Common Stock 69 621 D Restricted Stock Unit 2023-02-15 4 M 0 433 0.00 D Class A Common Stock 433 5200 D The sales reported on this Form 4 represent shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units ("RSUs"). The sales were to satisfy tax withholding obligations to be funded by a "sell to cover" transaction. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.70 to $17.09, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein. Each RSU represents a right to receive one share of the Issuer's Class A Common Stock at the time of vesting for no consideration. Unless otherwise provided, on each vesting date shares of common stock will automatically be sold to satisfy the Reporting Person's tax withholding obligations. The RSUs vest as to 1/16th of the total shares quarterly, beginning on August 15, 2021, 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 vest as to 1/16th of the total shares on May 15, 2022, and 1/16th of the total shares will vest quarterly thereafter, subject to the Reporting Person's provision of service to the Issuer on each vesting date. /s/ Andrew Woods, Attorney-in-Fact 2023-02-17