Mukul Kumar - 01 Jan 2026 Form 4 Insider Report for PubMatic, Inc. (PUBM)

Role: PRESIDENT, ENGINEERING
Issuer symbol: PUBM
Report date: 01 Jan 2026
Net transaction value: -$48,000
Form type: 4
Accepted by SEC: 05 Jan 2026, 19:20:23 UTC
Previous filing: 03 Oct 2025
Next filing: 19 Feb 2026
SEC filing: View on sec.gov
Reporting owner signature: /s/ Andrew Woods, Attorney-in-Fact

Key filing fact

Mukul Kumar filed Form 4 for PubMatic, Inc. (PUBM) on 05 Jan 2026.

Key facts

This page summarizes Mukul Kumar's Form 4 filing for PubMatic, Inc. (PUBM).
6 reported transactions and 4 derivative rows are listed below.
Accepted by SEC: 05 Jan 2026, 19:20.

Change

Previous filing in this sequence was filed on 03 Oct 2025.
Current net transaction value: -$48,000.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

See Original Filing

Reporting Owners (1)

CIK 0001833462 Primary reporting owner

Kumar Mukul

Relationship: PRESIDENT, ENGINEERING
Address: C/O PUBMATIC, INC., 601 MARSHALL STREET, REDWOOD CITY
Signature: /s/ Andrew Woods, Attorney-in-Fact
Signature date: 05 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

PUBM transaction

Class A Common Stock

Options Exercise

Transaction value: $0
Shares: +13,862
Change %: +18%
Price: $0.000000
Shares after: 92,914
Date: 01 Jan 2026
Ownership: Direct
Footnotes: F1

PUBM transaction

Class A Common Stock

Sale

Transaction value: $48,000
Shares: -5,573
Change %: -6%
Price: $8.61
Shares after: 87,341
Date: 01 Jan 2026
Ownership: Direct
Footnotes: F2, F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

PUBM transaction Derivative

Restricted Stock Unit

Options Exercise

Transaction value: $0
Shares: -2,247
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 01 Jan 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 2,247
Exercise price: $0.000000
Footnotes: F4, F5, F6

PUBM transaction Derivative

Restricted Stock Unit

Options Exercise

Transaction value: $0
Shares: -4,280
Change %: -20%
Price: $0.000000
Shares after: 17,117
Date: 01 Jan 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 4,280
Exercise price: $0.000000
Footnotes: F4, F6, F7

PUBM transaction Derivative

Restricted Stock Unit

Options Exercise

Transaction value: $0
Shares: -4,015
Change %: -11%
Price: $0.000000
Shares after: 32,114
Date: 01 Jan 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 4,015
Exercise price: $0.000000
Footnotes: F4, F6, F8

PUBM transaction Derivative

Restricted Stock Unit

Options Exercise

Transaction value: $0
Shares: -3,320
Change %: -7.7%
Price: $0.000000
Shares after: 39,844
Date: 01 Jan 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 3,320
Exercise price: $0.000000
Footnotes: F4, F6, F9

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 9 footnotes

Footnote F1

Includes 1,067 shares of Class A common stock acquired by the Reporting Person on May 30, 2025 and 592 shares of Class A common stock acquired by the Reporting Person on November 28, 2025 pursuant to the Issuer's employee stock purchase plan.

Footnote F2

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.

Footnote F3

The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $8.44 to $8.88, 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 with regard to the block trades.

Footnote F4

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.

Footnote F5

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.

Footnote F6

RSUs do not expire; they either vest or are canceled prior to the vesting date.

Footnote F7

The RSUs vested as to 1/16th of the total award 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.

Footnote F8

The RSUs vested as to 1/16th of the total shares on April 1, 2024, 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.

Footnote F9

The RSUs vested as to 1/16th of the total shares on April 1, 2025, 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.