Perma-Fix posts updated September investor deck

Q: What is the form type and main item used by PESI for this disclosure?

Perma-Fix Environmental Services, Inc. used a Form 8-K and reported the disclosure under Item 8.01 – Other Events, indicating the availability of an updated investor presentation.

Perma-Fix Environmental Services, Inc. released a refreshed investor presentation for September 2026 as an exhibit and on its website.

Available on EDGAR 09/22/2026 - 07:01 AM EDT Accepted by SEC EDGAR 09/22/2026 - 07:00 AM EDT

Filing Impact

(High)

Filing Sentiment

(Neutral)How Sentiment works

Sentiment and the balance of points

Rhea-AI Sentiment reads the wording of the document, how positive or negative its language is on a 1 to 5 scale. The balance of points shown with the takes weighs what the document actually discloses, so the two can disagree, for example when a trial that missed its main goal is described in upbeat language.

How Sentiment works How the balance works

Form Type

8-K

Rhea-AI Filing Summary

Perma-Fix Environmental Services, Inc. (PESI) reported that on September 22, 2026 it made available an updated investor presentation titled “Investor Presentation, September 2026.” The presentation is furnished as Exhibit 99.1 to this report and is also posted on the company’s website.

8-K Event Classification

2 items: 8.01, 9.01

2 items

Item 8.01 Other Events Other

Voluntary disclosure of events the company deems important to shareholders but not covered by other items.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, or exhibit attachments filed with this report.

Key Figures

Form date: September 22, 2026 Par value per share: $0.001 per share

2 metrics

Form date September 22, 2026 Date Perma-Fix Environmental Services, Inc. made the updated investor presentation available

Par value per share $0.001 per share Par value of Perma-Fix Environmental Services, Inc. common stock

Key Terms

Emerging growth company, Inline XBRL, Nasdaq Capital Market

3 terms

Emerging growth company regulatory

"Emerging growth company"

An emerging growth company is a recently public or smaller public firm that qualifies for temporary, lighter regulatory and disclosure rules to reduce the cost and effort of being public. For investors, it means the company may provide less historical financial detail and face fewer reporting requirements than larger firms, so it can grow more quickly but also carries higher uncertainty—like buying a promising early-stage product with fewer user reviews.

Inline XBRL technical

"Cover Page Interactive Data File (embedded within the Inline XBRL document)"

Inline XBRL is a file format for financial filings that embeds machine-readable data tags directly inside the human-readable report, so the same document can be read by people and parsed by software. For investors it makes extracting, comparing and verifying financial numbers faster and more reliable—like a grocery list where each item also has a barcode—reducing manual errors and speeding up analysis.

Nasdaq Capital Market market

"PESI | | Nasdaq Capital Market"

The Nasdaq Capital Market is a platform where smaller, emerging companies can list their shares for trading by investors. It provides these companies with access to funding and visibility, helping them grow, much like a local marketplace where new vendors can introduce their products to potential customers. For investors, it offers opportunities to discover early-stage companies with growth potential.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did PESI announce in its September 22, 2026 Form 8-K?

Perma-Fix Environmental Services, Inc. announced that it made available an updated investor presentation titled “Investor Presentation, September 2026”, which is attached as Exhibit 99.1 and posted on the company’s website.

Where can investors find PESI’s September 2026 investor presentation?

The September 2026 investor presentation for Perma-Fix Environmental Services, Inc. is included as Exhibit 99.1 to this report and is also posted on the company’s website, as stated by the company.

What is the form type and main item used by PESI for this disclosure?

Perma-Fix Environmental Services, Inc. used a Form 8-K and reported the disclosure under Item 8.01 – Other Events, indicating the availability of an updated investor presentation.

What is the trading symbol and exchange for Perma-Fix Environmental Services, Inc.?

Perma-Fix Environmental Services, Inc.’s common stock, par value $0.001 per share, trades under the symbol PESI on the Nasdaq Capital Market.

Who signed the September 22, 2026 Form 8-K for PESI?

The report was signed on behalf of Perma-Fix Environmental Services, Inc. by Ben Naccarato, who is the company’s Executive Vice President and Chief Financial Officer.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Understanding 8-K Material Events →

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported) September 22, 2026

PERMA FIX ENVIRONMENTAL SERVICES INC

PERMA-FIX ENVIRONMENTAL SERVICES, INC.

(Exact name of registrant as specified in its charter)

Delaware

1-11596

58-1954497

(State or other jurisdiction of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

8302 Dunwoody Place, Suite 250, Atlanta, Georgia		30350
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (770) 587-9898

Not applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class		Trading Symbol		Name of each exchange on which registered
Common Stock, Par Value, $.001 Per Share		PESI		Nasdaq Capital Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act ☐

Item 8.01 – Other Events.

On September 22, 2026, Perma-Fix Environmental Services, Inc. (the “Company”) made available an updated investor presentation, “Investor Presentation, September 2026,” attached to this Report as Exhibit 99.1, and incorporated herein by reference. The investor presentation is also posted to the Company’s website.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits.

Exhibit		Description
99.1		Perma-Fix Environmental Services, Inc. Investor Presentation, September 2026.
104		Cover Page Interactive Data File (embedded within the Inline XBRL document).

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: September 22, 2026