Who signed the ASP Isotopes Inc. (ASPI) Form 8-K related to the shareholder letter?

The Form 8-K was signed on behalf of ASP Isotopes Inc. by Donald G. Ainscow, Executive Vice President, General Counsel and Secretary.

ASP Isotopes posts shareholder letter on Sept. 2

ASP Isotopes Inc. filed a current report to disclose that it issued a letter to shareholders dated September 2, 2025.

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.

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Form Type

8-K

Rhea-AI Filing Summary

ASP Isotopes Inc. filed a current report to disclose that it issued a letter to shareholders dated September 2, 2025. The company is furnishing this shareholder letter as Exhibit 99.1 under a Regulation FD disclosure item, meaning it is intended to provide broadly available information to the market. The filing specifies that the information in Item 7.01 and Exhibit 99.1 is being furnished, not filed, so it is not subject to certain Exchange Act liabilities and will only be incorporated into other SEC documents if specifically referenced.

8-K Event Classification

2 items: 7.01, 9.01

2 items

Item 7.01 Regulation FD Disclosure Disclosure

Material non-public information disclosed under Regulation Fair Disclosure, often investor presentations or guidance.

Item 9.01 Financial Statements and Exhibits Exhibits

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

FAQ

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

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

ASP Isotopes Inc. reported that it issued a shareholder letter dated September 2, 2025 and furnished it as Exhibit 99.1 under a Regulation FD disclosure item.

What is Exhibit 99.1 in ASP Isotopes Inc. (ASPI)'s Form 8-K?

Exhibit 99.1 is the ASP Isotopes Inc. letter to shareholders dated September 2, 2025, which is incorporated by reference into the Form 8-K as a furnished exhibit.

Is the ASP Isotopes Inc. (ASPI) shareholder letter considered 'filed' with the SEC?

No. The company states that the information in Item 7.01 and Exhibit 99.1 is being furnished, not filed, and is not subject to Section 18 of the Exchange Act.

Does this ASP Isotopes Inc. (ASPI) Form 8-K include financial statements?

Under Item 9.01, the Form 8-K lists only Exhibit 99.1, the shareholder letter, and Exhibit 104, the cover page interactive data file; no separate financial statements are listed.

Which Nasdaq-listed security of ASP Isotopes Inc. (ASPI) is referenced in the filing?

The filing lists ASP Isotopes Inc.'s common stock, par value $0.01 per share, traded on The Nasdaq Stock Market LLC under the symbol ASPI.

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

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Accepted by SEC EDGAR 09/02/2025 - 09:34 AM

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 2, 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 September 2, 2025, ASP Isotopes Inc. (the “Company”) issued a letter to shareholders. A copy of the press release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Item 7.01, including Exhibit 99.1, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01. Financial Statements and Exhibits.

Exhibit No.		Description
99.1		ASP Isotopes Inc. Letter to Shareholders, dated September 2, 2025.
104		Cover Page Interactive Date 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.

	ASP ISOTOPES INC.

Date: September 2, 2025	By:	/s/ Donald G. Ainscow
	Name:	Donald G. Ainscow
	Title:	Executive Vice President, General Counsel and Secretary

Source: View Original Filing on SEC EDGAR