Shelagh Glaser - 29 May 2026 Form 4 Insider Report for PubMatic, Inc. (PUBM)

Reporting relationship: Director
Issuer ticker: PUBM
Reported as of: 29 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 02 Jun 2026, 18:09:06 UTC
Prior SEC filing: 16 Mar 2026
Next SEC filing: 15 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Andrew Woods, Attorney-in-Fact

Key filing fact

Shelagh Glaser filed Form 4 for PubMatic, Inc. (PUBM) on 02 Jun 2026.

Key facts

This page summarizes Shelagh Glaser's Form 4 filing for PubMatic, Inc. (PUBM).
4 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 02 Jun 2026, 18:09.

Change

Previous filing in this sequence was filed on 16 Mar 2026.
Current net transaction value: $0.

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.

View source filing

Reporting Owners (1)

CIK 0001865504 Primary reporting owner

Glaser Shelagh

Relationship: Director
Address: C/O PUBMATIC, INC., 601 MARSHALL STREET, REDWOOD CITY
Signature: /s/ Andrew Woods, Attorney-in-Fact
Signature date: 02 Jun 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
Shares: +13,437
Change %: +167%
Price: $0.000000^*
Shares after: 21,502
Date: 31 May 2026
Ownership: Direct

Reported derivative securities

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

PUBM transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +15,839
Change %
Price: $0.000000^*
Shares after: 15,839
Date: 29 May 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 15,839
Exercise price
Footnotes: F1, F2, F3

PUBM transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -9,971
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 31 May 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 9,971
Exercise price
Footnotes: F1, F3, F4

PUBM transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -3,466
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 31 May 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 3,466
Exercise price
Footnotes: F1, F3, F5

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Class A Common Stock upon settlement.

Footnote F2

The RSUs vest in full on the earliest to occur of (a) the first anniversary of the grant date, (b) immediately prior to the Company's annual meeting of stockholders in 2027, (c) the Reporting Person's death or disability, and (d) a change in control of the Issuer. Shares of the Issuer's Class A Common Stock will be delivered to the Reporting Person upon settlement of the RSUs.

Footnote F3

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

Footnote F4

The RSUs vest in full on the earliest to occur of (a) the first anniversary of the grant date, (b) immediately prior to the Company's annual meeting of stockholders in 2024, (c) the Reporting Person's death or disability, and (d) a change in control of the Issuer. The Reporting Person has elected to defer settlement of the RSUs until the earliest to occur of (i) the third anniversary of the grant date, (ii) the Reporting Person's death or disability, (iii) a change in control of the Issuer, and (iv) the Reporting Person's separation of service from the Issuer. Shares of the Issuer's Class A Common Stock will be delivered to the Reporting Person upon settlement of the RSUs.

Footnote F5

Represents RSUs payable in lieu of annual cash fees for Board of Directors and committee service pursuant to the Reporting Person's election under the Issuer's non-employee director compensation policy. The RSUs vested in full on December 31, 2023. The Reporting Person elected to defer settlement of the RSUs until the earliest to occur of (a) the third anniversary of the Grant Date, (b) the Reporting Person's separation from service from the Issuer, and (c) a change in control of the Issuer. Shares of the Issuer's Class A Common Stock will be delivered to the Reporting Person upon settlement of the RSUs.