X0508 4 2023-12-31 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 0 Class A Common Stock 2023-12-31 4 M 0 2261 0.00 A 14917 D Class A Common Stock 2024-01-01 4 M 0 14603 0.00 A 29520 D Class A Common Stock 2024-01-02 4 S 0 1181 16.0223 D 28339 D Class A Common Stock 2024-01-02 4 S 0 6152 15.9642 D 22187 D Class A Common Stock 2024-01-03 4 S 0 9531 15.5004 D 12656 D Restricted Stock Unit 0.00 2023-12-31 4 M 0 2261 0.00 D Class A Common Stock 2261 9043 D Restricted Stock Unit 0.00 2024-01-01 4 M 0 5057 0.00 D Class A Common Stock 5057 40451 D Restricted Stock Unit 0.00 2024-01-01 4 M 0 9546 0.00 D Class A Common Stock 9546 114554 D The sales reported on this line item 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 $16.00 to $16.17, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.91 to $16.04, 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. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on March 1, 2023. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.25 to $15.81, 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 settlement 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. The RSUs vested as to 1/16th of the total shares on April 1, 2023, 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 2024-01-03