ASPI files Form 8-K with Third Quarter 2025 update deck

Rhea-AI Filing Summary

ASP Isotopes Inc. filed a Form 8-K to furnish an investor presentation connected to its previously announced quarterly business update conference. On November 21, 2025, the company released a "Third Quarter Update Call" presentation, dated as of November 2025, which is attached as Exhibit 99.1. The information in the presentation is provided as of November 2025, and the company states it does not assume any obligation to update it. The material is furnished under Regulation FD and is expressly not deemed "filed" for purposes of certain liability provisions of the federal securities laws.

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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): November 21, 2025

ASP Isotopes Inc.

(Exact name of registrant as specified in its charter)

Delaware		001-41555		87-2618235
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

601 Pennsylvania Avenue NW, South Building, Suite 900 Washington, DC		20004
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (202) 756-2245

 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 (17 CFR 230.425)

☐  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.01		ASPI		The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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 7.01. Regulation FD Disclosure.

On November 21, 2025, ASP Isotopes Inc. (the “Company”) released a presentation in connection with its previously announced quarterly business update conference, which is attached hereto as Exhibit 99.1 and is incorporated by reference herein. All of the information in the attached presentation is presented as of November 2025, and the Company does not assume any obligation to update such information in the future.

The information in this Item 7.01 and in the Company presentation furnished as Exhibit 99.1 to this Current Report on Form 8-K shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended, and shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

The Company’s Company presentation furnished as Exhibit 99.1 to this Current Report on Form 8-K includes “safe harbor” language pursuant to the Private Securities Litigation Reform Act of 1995, as amended, indicating that certain statements contained therein are “forward-looking” rather than historical.

Item 9.01. Financial Statements and Exhibits.

Exhibit No.		Description
99.1		ASP Isotopes Inc. Third Quarter Update Call presentation dated as of November 2025.
104		Cover Page Interactive Date File (embedded within the Inline XBRL document)

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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.

	ASP ISOTOPES INC.
Date: November 21, 2025	By:	/s/ Donald G. Ainscow
	Name:	Donald G. Ainscow
	Title:	Executive Vice President, General Counsel and Secretary

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FAQ

What did ASP Isotopes Inc. (ASPI) announce in this Form 8-K?

ASP Isotopes Inc. reported that on November 21, 2025 it released a presentation for its previously announced quarterly business update conference, which is furnished as Exhibit 99.1 to the Form 8-K.

What is included in Exhibit 99.1 of ASPI’s Form 8-K?

Exhibit 99.1 is titled "ASP Isotopes Inc. Third Quarter Update Call presentation" and is dated as of November 2025.

Under which item of Form 8-K did ASP Isotopes provide the presentation?

The presentation is furnished under Item 7.01, Regulation FD Disclosure, which covers information shared to ensure broad, non-selective disclosure to the market.

Is the ASPI Third Quarter Update Call presentation considered "filed" with the SEC?

No. The company states that the information in Item 7.01 and Exhibit 99.1 is furnished, not "filed," and therefore is not subject to liability under Section 18 of the Exchange Act or Sections 11 and 12(a)(2) of the Securities Act.

Does ASP Isotopes plan to update the information in the November 2025 presentation?

The company states that all information in the presentation is provided as of November 2025 and that it does not assume any obligation to update such information in the future.

Does the ASPI presentation include forward-looking statements?

Yes. The company notes that the presentation furnished as Exhibit 99.1 includes "safe harbor" language under the Private Securities Litigation Reform Act of 1995, indicating that certain statements are forward-looking rather than historical.