As of November 10, 2026, Plug Power Inc. is a publicly traded company (Nasdaq: PLUG); its largest reported holder is BlackRock, with 12.8% on Schedule 13G/A of July 29, 2026, then Vanguard (5.23%). The largest insider holding is Paul B. Middleton, the chief financial officer and executive vice president, with 3,011,661 shares (0.22% of shares outstanding), per Form 4 of June 29, 2026 (Schedule 13G/A, July 29, 2026).
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Is Plug Power Inc. a real, registered company?
- Plug Power Inc files with the SEC under CIK 1093691 (its SEC filings).
- Its shares are listed under the ticker PLUG on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Slingerlands, New York, 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 PLUG POWER INC in our court records and SEC 8-K records (as of 2026-11-10).
- Layoffs: 3 state WARN notices (latest 2025-03-25, Clifton Park NY, 2 employees).
- Leadership changes: the latest reported is Dean C. Fullerton, Chief Operating Officer (Form 8-K filed 2026-09-23). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names BlackRock (filed 2026-07-29).
Who are Plug Power Inc.'s owners and officers?
Plug Power Inc.: incorporated in Delaware; business address in Slingerlands, New York; industry Electrical Industrial Apparatus (Form D, 2026-09-23).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-07-29 | Blackrock, Inc. | 12.8% |
| Schedule 13G, 2026-04-30 | Vanguard Capital Management | 5.23% |
| Schedule 13G/A, 2026-04-07 | Blackrock, Inc. | 10.5% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2025-10-17 | Blackrock, Inc. | 8.3% |
| Schedule 13G/A, 2025-07-24 | Norges Bank | 0.4% |
| Schedule 13G/A, 2025-07-17 | Blackrock, Inc. | 7.2% |
Questions about who owns Plug Power Inc.
Who owns Plug Power Inc.?
On this page, 2 holders' latest ownership filings report 5% or more of Plug Power Inc.: Blackrock, Inc. (12.8%, Schedule 13G/A, filed 2026-07-29) and Vanguard Capital Management (5.23%, Schedule 13G, filed 2026-04-30).
Who are the largest shareholders of Plug Power Inc.?
By the share each holder's latest filing reports, the largest holders of Plug Power Inc. on this page are Blackrock, Inc. (12.8%) and Vanguard Capital Management (5.23%).
When did Blackrock, Inc. buy into Plug Power Inc.?
The filings give report dates, not purchase dates. The earliest filing from Blackrock, Inc. on this page is the Schedule 13G/A, filed 2025-07-17, reporting 7.2%; its latest, Schedule 13G/A filed 2026-07-29, reports 12.8%. 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%); 7 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, 2026-09-23 | Dean C. Fullerton | Chief Operating Officer | departed | 2026-10-23 |
| Form 8-K, 2026-06-04 | Kavita Mahtani | Director | departed | 2026-06-11 |
Which insiders own Plug Power 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 financial officer and executive vice president: 3,011,661 shares (0.22% of shares outstanding), 2,947,169 held directly and 64,492 indirectly (Form 4, 2026-06-29).
- , a director: 1,173,282 shares (0.08% of shares outstanding), 873,282 held directly and 300,000 indirectly (Form 4, 2026-06-16).
- , a director: 975,256 shares (0.07% of shares outstanding), 853,378 held directly and 121,878 indirectly (Form 4, 2026-04-10).
- , a director: 730,107 shares (0.05% of shares outstanding) (Form 4, 2026-06-16).
- , a director: 520,340 shares (0.04% of shares outstanding) (Form 4, 2026-10-02).
Shares outstanding: 1,398,871,823 as of 2026-11-04, from the company's latest SEC cover page.
How much has Plug Power Inc. raised?
No fundraising or offering filing from Plug Power Inc. is on file with us.
Keep reading
More on Plug Power Inc. and the records around it.
Plug Power Inc. elsewhere on the record
- Leadership changes Sep 2026
Companies that share a holder
- Norges Bank also filed stake reports on 36 other companies: Atour Lifestyle Holdings Ltd (Aug 2026), BXP, Inc. (Aug 2026), Cabaletta Bio, Inc. (Aug 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)
- BlackRock, Inc. also filed stake reports on 1596 other companies: AvePoint, Inc. (Nov 2026), BIOMARIN PHARMACEUTICAL INC (Nov 2026), MSG RANGERS CORP (Nov 2026)
Related pages
LayoffsLeadership changes5%+ holders
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