ASPI subsidiary starts early U.K. nuclear regulatory engagement

Rhea-AI Filing Summary

ASP Isotopes Inc. (ASPI) reported a corporate update. The company announced that its U.K. subsidiary, Quantum Leap Energy Ltd., has commenced early engagement for regulatory pathways with U.K. nuclear regulators.

The announcement was made via a press release, which is furnished as Exhibit 99.1 and incorporated by reference in this report, other than the fourth and eighth paragraphs of that press release.

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, and exhibit attachments filed with this report.

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): November 5, 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 8.01. Other Events.

On November 5, 2025, ASP Isotopes Inc. (the “Company”) issued a press release announcing that the Company’s U.K. subsidiary, Quantum Leap Energy Ltd. has commenced early engagement for regulatory pathways with U.K. nuclear regulators.  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, other than the fourth and eighth paragraphs of the press release.

Item 9.01. Financial Statements and Exhibits.

Exhibit No.		Description
99.1		Press Release, dated November 5, 2025, of ASP Isotopes Inc. announcing Quantum Leap Energy Ltd. has commenced early engagement for regulatory pathways with U.K. nuclear regulators.
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 5, 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 (ASPI) announce in its Form 8-K?

The company said its U.K. subsidiary, Quantum Leap Energy Ltd., has begun early engagement for regulatory pathways with U.K. nuclear regulators.

Which subsidiary of ASPI is involved in the U.K. regulatory engagement?

Quantum Leap Energy Ltd., the company’s U.K. subsidiary.

How was the ASPI update communicated to investors?

Through a press release furnished as Exhibit 99.1 to the Form 8-K.

Are all parts of the press release incorporated by reference?

All except the fourth and eighth paragraphs are incorporated by reference.

What is the trading symbol and exchange for ASP Isotopes?

ASPI on The Nasdaq Stock Market LLC.

When was the event reported by ASP Isotopes?

On November 5, 2025.