As of November 6, 2026, PubMatic, Inc. is a publicly traded company (Nasdaq: PUBM); its largest reported holder is Graham Holdings Company, with 8.9% on Schedule 13G/A of May 15, 2026, then BlackRock (7.1%). The largest insider holding is Mukul Kumar, the president and engineering, with 117,041 shares, per Form 4 of October 19, 2026 (Schedule 13G/A, May 15, 2026).
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Is PubMatic, Inc. a real, registered company?
- PubMatic, Inc. files with the SEC under CIK 1422930 (its SEC filings).
- Its shares are listed under the ticker PUBM on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Redwood City, California, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under PubMatic, Inc. in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Paulina Klimenko (Form 8-K filed 2026-04-22). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Graham Holdings Company (filed 2026-05-15).
Who are PubMatic, Inc.'s owners and officers?
PubMatic, Inc.: incorporated in Delaware; business address in Redwood City, California; industry Services-Computer Programming, Data Processing, Etc. (Schedule 13G/A, 2026-05-15).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-05-15 | Graham Holdings Company | 8.9% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-01-21 | Blackrock, Inc. | 7.1% |
| Schedule 13G/A, 2025-07-29 | The Vanguard Group | 6.48% |
Questions about who owns PubMatic, Inc.
Who owns PubMatic, Inc.?
On this page, 2 holders' latest ownership filings report 5% or more of PubMatic, Inc.: Graham Holdings Company (8.9%, Schedule 13G/A, filed 2026-05-15) and Blackrock, Inc. (7.1%, Schedule 13G/A, filed 2026-01-21).
Who are the largest shareholders of PubMatic, Inc.?
By the share each holder's latest filing reports, the largest holders of PubMatic, Inc. on this page are Graham Holdings Company (8.9%) and Blackrock, Inc. (7.1%).
When did Graham Holdings Company buy into PubMatic, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Graham Holdings Company on this page is the Schedule 13G/A, filed 2026-05-15, reporting 8.9%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 4 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-04-22 | Paulina Klimenko | departed |
Which insiders own PubMatic, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the president and engineering: 117,041 shares (Form 4, 2026-10-19).
- , the chief growth officer: 71,044 shares (Form 4, 2026-07-06).
- , the general counsel and amp: 39,761 shares (Form 4, 2026-10-06).
- , the chairman and chief innovation officer: 35,580 shares (Form 4, 2026-10-06).
- , the chief executive and a director: 31,774 shares (Form 4, 2026-10-23).
Shares only: the company's cover page does not give one share count for a single class, so no percentage is worked out.
How much has PubMatic, Inc. raised?
No fundraising or offering filing from PubMatic, Inc. is on file with us.
Keep reading
More on PubMatic, Inc. and the records around it.
PubMatic, Inc. elsewhere on the record
- Leadership changes Aug 2026
Companies that share a holder
- BlackRock, Inc. also filed stake reports on 1596 other companies: AvePoint, Inc. (Nov 2026), BIOMARIN PHARMACEUTICAL INC (Nov 2026), MSG RANGERS CORP (Nov 2026)
- The Vanguard Group also filed stake reports on 2384 other companies: BellRing Brands, Inc. (Sep 2026), CAL-MAINE FOODS INC (Sep 2026), FTAI Aviation Ltd. (Sep 2026)
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