As of November 10, 2026, Formfactor Inc. is a publicly traded company (Nasdaq: FORM); its largest reported holder is BlackRock, with 12.4% on Schedule 13G/A of July 28, 2026, then Vanguard (7.61%). The largest insider holding is Mike Slessor, the chief executive and a director, with 460,909 shares (0.59% of shares outstanding), per Form 4 of November 9, 2026 (Schedule 13G/A, July 28, 2026).
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Is Formfactor Inc. a real, registered company?
- Formfactor Inc files with the SEC under CIK 1039399 (its SEC filings).
- Its shares are listed under the ticker FORM on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Livermore, California, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court record: 10 federal cases name Formfactor Inc. under its legal name in its state, 1 still open on the docket; the latest is Technoprobe S.p.A. v. FormFactor, Inc., filed 2024-05-31.
- Bankruptcy: no bankruptcy or receivership report found under FORMFACTOR INC in our SEC 8-K records (as of 2026-11-10).
- Layoffs: 1 exit or restructuring plan reported on Form 8-K, Item 2.05 (latest filed 2026-01-09, about 300 jobs).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names BlackRock (filed 2026-07-28).
Who are Formfactor Inc.'s owners and officers?
Formfactor Inc.: incorporated in Delaware; business address in Livermore, California; industry Semiconductors & Related Devices (Form D, 2026-10-20).
Officers and directors, each with the role and the filing that names them:
- : Executive Officer, Director (Form D, 2026-10-20)
- : Executive Officer (Form D, 2026-10-20)
- : Director (Form D, 2026-10-20)
- : Director (Form D, 2026-10-20)
- : Director (Form D, 2026-10-20)
- : Director (Form D, 2026-10-20)
- : Director (Form D, 2026-10-20)
- : Director (Form D, 2026-10-20)
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-08-14 | Earnest Partners LLC | 4.8% |
| Schedule 13G/A, 2026-07-28 | Blackrock, Inc. | 12.4% |
| Schedule 13G/A, 2026-05-15 | Earnest Partners LLC | 6.3% |
| Schedule 13G, 2026-04-29 | Vanguard Capital Management | 5.21% |
| Schedule 13G, 2026-04-29 | Vanguard Portfolio Management | 7.61% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
Questions about who owns Formfactor Inc.
Who owns Formfactor Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Formfactor Inc.: Blackrock, Inc. (12.4%, Schedule 13G/A, filed 2026-07-28), Vanguard Portfolio Management (7.61%, Schedule 13G, filed 2026-04-29) and Vanguard Capital Management (5.21%, Schedule 13G, filed 2026-04-29).
Who are the largest shareholders of Formfactor Inc.?
By the share each holder's latest filing reports, the largest holders of Formfactor Inc. on this page are Blackrock, Inc. (12.4%), Vanguard Portfolio Management (7.61%) and Vanguard Capital Management (5.21%).
When did Blackrock, Inc. buy into Formfactor Inc.?
The filings give report dates, not purchase dates. The earliest filing from Blackrock, Inc. on this page is the Schedule 13G/A, filed 2026-07-28, reporting 12.4%. 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%); 6 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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What the Full Report on Formfactor Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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Which insiders own Formfactor 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 chief executive and a director: 460,909 shares (0.59% of shares outstanding) (Form 4, 2026-11-09).
- , the chief financial officer and senior vice president global finance: 55,968 shares (0.07% of shares outstanding) (Form 4, 2025-08-08).
- , a director: 28,333 shares (0.04% of shares outstanding) (Form 4, 2026-06-16).
- , a director: 24,426 shares (0.03% of shares outstanding) (Form 4, 2026-09-04).
- , the chief financial officer and senior vice president global finance: 15,485 shares (0.02% of shares outstanding) (Form 4, 2026-11-09).
Shares outstanding: 78,403,115 as of 2026-10-28, from the company's latest SEC cover page.
How much has Formfactor Inc. raised?
| Filed | Sold | Offered |
|---|---|---|
| Form D, 2026-10-20 | $300M | $300M |
| Form D, 2025-01-17 | $15M | $15M |
What is Formfactor Inc.'s court and legal record?
| Case | Court | Filed | Status |
|---|---|---|---|
| Technoprobe S.p.A. v. FormFactor, Inc. | District Court, D. Delaware | 2024-05-31 | open |
| Technoprobe S.p.A. v. FormFactor, Inc. | District Court, D. Delaware | 2023-08-04 | closed 2025-06-05 |
| Feinmetall GmbH v. FormFactor, Inc. | District Court, D. Delaware | 2018-07-17 | closed 2020-04-16 |
| Formfactor, Inc. -v- Martek, Inc. | District Court, N.D. California | 2014-03-10 | closed 2015-07-17 |
| Formfactor, Inc. v. Mr. Prober Technology Inc. | District Court, N.D. California | 2013-08-08 | closed 2015-05-29 |
| Formfactor, Inc. v. EG Systems, LLC | District Court, N.D. California | 2013-08-01 | closed 2013-10-29 |
| FormFactor Inc v. Micro-Probe Incorporated | District Court, C.D. California | 2011-06-15 | closed 2012-05-17 |
| Formfactor, Inc. v. Micro-Probe Inc. | District Court, N.D. California | 2010-07-14 | closed 2012-11-21 |
| Albertazzi v. Formfactor, Inc. | District Court, N.D. California | 2007-12-03 | closed 2009-07-14 |
| Lui v. Formfactor, Inc. | District Court, N.D. California | 2007-11-20 | closed 2009-07-14 |
A docket records that a case was brought, not that anything in it is true.
Red flags found
1 open federal case (latest Technoprobe S.p.A. v. FormFactor, Inc.); 1 exit or restructuring plan on Form 8-K (latest Form 8-K, 2026-01-09).
Keep reading
More on Formfactor Inc. and the records around it.
Formfactor Inc. elsewhere on the record
- Company profile and every filing Oct 2026
- Form D filing Oct 2026
- 5%+ stake filings Aug 2026
- Layoff notices Jan 2026
Companies that share a holder
- EARNEST PARTNERS LLC also filed stake reports on 18 other companies: PAPA JOHNS INTERNATIONAL INC (Aug 2026), Sabre Corp (Aug 2026), WOLVERINE WORLD WIDE INC /DE/ (Aug 2026)
- Vanguard Portfolio Management also filed stake reports on 941 other companies: Newmark Group Inc (Nov 2026), A10 Networks Inc (Oct 2026), ADT Inc (Oct 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
Related pages
Funding and filing historyLayoffs5%+ holdersCourt record
Filings, cases and notices link to their records. A not-found line names the records searched; it is not proof of absence.
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