As of November 6, 2026, Perma Fix Environmental Services Inc. is a publicly traded company (Nasdaq: PESI); its largest reported holder is HOLD Alapkezelo Zrt., with 15.2% on Schedule 13G/A of October 28, 2026, then MAK Capital Fund LP (5.5%) (Schedule 13G/A, October 28, 2026).
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Is Perma Fix Environmental Services Inc. a real, registered company?
- Perma Fix Environmental Services Inc files with the SEC under CIK 891532 (its SEC filings).
- Its shares are listed under the ticker PESI on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Atlanta, Georgia, 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 PERMA FIX ENVIRONMENTAL SERVICES INC in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names HOLD Alapkezelo Zrt. (filed 2026-10-28).
Who are Perma Fix Environmental Services Inc.'s owners and officers?
Perma Fix Environmental Services Inc.: incorporated in Delaware; business address in Atlanta, Georgia; industry Hazardous Waste Management (Schedule 13G/A, 2026-10-28).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-10-28 | Hold Alapkezelo Zrt. | 15.2% |
| Schedule 13G/A, 2026-08-28 | Mak Capital One LLC | 4.8% |
| Schedule 13G/A, 2026-08-27 | Hold Alapkezelo Zrt. | 10.6% |
| Schedule 13G/A, 2026-08-07 | Mak Capital Fund LP | 5.5% |
| Schedule 13G, 2026-08-06 | Mak Capital Fund LP | 5.5% |
| Schedule 13G, 2026-03-30 | Hold Alapkezelo Zrt. | 5.1% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G, 2025-10-30 | The Vanguard Group | 5.06% |
Questions about who owns Perma Fix Environmental Services Inc.
Who owns Perma Fix Environmental Services Inc.?
On this page, 2 holders' latest ownership filings report 5% or more of Perma Fix Environmental Services Inc.: Hold Alapkezelo Zrt. (15.2%, Schedule 13G/A, filed 2026-10-28) and Mak Capital Fund LP (5.5%, Schedule 13G/A, filed 2026-08-07).
Who are the largest shareholders of Perma Fix Environmental Services Inc.?
By the share each holder's latest filing reports, the largest holders of Perma Fix Environmental Services Inc. on this page are Hold Alapkezelo Zrt. (15.2%) and Mak Capital Fund LP (5.5%).
When did Hold Alapkezelo Zrt. buy into Perma Fix Environmental Services Inc.?
The filings give report dates, not purchase dates. The earliest filing from Hold Alapkezelo Zrt. on this page is the Schedule 13G, filed 2026-03-30, reporting 5.1%; its latest, Schedule 13G/A filed 2026-10-28, reports 15.2%.
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%); 8 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 Perma Fix Environmental Services Inc. covers
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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 Perma Fix Environmental Services 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 executive vice president of strategic initiatives and a director: 280,365 shares (1.3% of shares outstanding), 217,565 held directly and 62,800 indirectly (Form 4, 2026-02-10).
- , a director: 248,644 shares (1.2% of shares outstanding) (Form 4, 2026-10-02).
- , a director: 240,634 shares (1.1% of shares outstanding) (Form 4, 2026-10-02).
- , a director: 200,229 shares (0.94% of shares outstanding) (Form 4, 2026-10-02).
- , the chief executive and president: 134,556 shares (0.63% of shares outstanding) (Form 4, 2025-09-12).
Shares outstanding: 21,238,007 as of 2026-11-03, from the company's latest SEC cover page.
How much has Perma Fix Environmental Services Inc. raised?
No fundraising or offering filing from Perma Fix Environmental Services Inc. is on file with us.
Keep reading
More on Perma Fix Environmental Services Inc. and the records around it.
Perma Fix Environmental Services Inc. elsewhere on the record
- 5%+ stake filings Oct 2026
Companies that share a holder
- HOLD Alapkezelo Zrt. also filed stake reports on 2 other companies: Protalix BioTherapeutics, Inc. (Oct 2026), MediWound Ltd. (Aug 2026)
- MAK Capital Fund LP also filed stake reports on 3 other companies: STANDARD BIOTOOLS INC. (Aug 2026), ClearPoint Neuro, Inc. (Aug 2026), HEIDRICK & STRUGGLES INTERNATIONAL INC (Nov 2025)
- 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)
Related pages
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