IsoEnergy 6-K on 2025 Athabasca Exploration

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FAQ

What does IsoEnergy Ltd. (ISOU) report in this Form 6-K?

What is the main focus of IsoEnergy’s December 3, 2025 news release?

Which project is specifically mentioned in IsoEnergy’s 2025 exploration update?

What type of issuer is IsoEnergy Ltd. (ISOU) under U.S. securities rules?

Which annual report form does IsoEnergy Ltd. file with the SEC?

Who signed IsoEnergy Ltd.’s December 2025 Form 6-K submission?

IsoEnergy Ltd. filed a Form 6-K as a foreign private issuer, mainly to furnish a news release dated December 3, 2025.

Accepted by SEC EDGAR 12/03/2025 - 07:22 AM EST

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Form Type

6-K

IsoEnergy Ltd. filed a Form 6-K as a foreign private issuer, mainly to furnish a news release dated December 3, 2025. The release provides a 2025 Athabasca Basin exploration update and notes preparations to launch winter exploration programs, including drilling at the Larocque East project.

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IsoEnergy Ltd. uses this Form 6-K to furnish a news release dated December 3, 2025. The release covers a 2025 Athabasca Basin exploration update and upcoming winter exploration programs, including drilling at Larocque East.

The news release focuses on a 2025 exploration update in the Athabasca Basin. It also highlights preparation for winter exploration programs, which will include drilling activities at the Larocque East property.

The filing notes that IsoEnergy’s winter exploration programs will include drilling at the Larocque East project. This project is referenced within the broader 2025 Athabasca Basin exploration update provided in the news release.

IsoEnergy Ltd. is identified as a foreign private issuer under U.S. securities regulations. As such, it files current information on Form 6-K, rather than on domestic forms like Form 8-K.

The document indicates that IsoEnergy Ltd. files its annual reports under cover of Form 20-F. This is the standard annual reporting form used by many foreign private issuers listed in U.S. markets.

ISOENERGY LTD.

Date: December 3, 2025

/s/ Graham du Preez

Name: Graham du Preez

Title: Chief Financial Officer

The Form 6-K was signed on behalf of IsoEnergy Ltd. by Graham du Preez. He is identified in the document as the company’s Chief Financial Officer at the time of signing.

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Form 6-K: How Foreign Companies Report to the SEC →

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of December 2025

Commission File Number 001-42611

ISOENERGY LTD.

(Exact name of Registrant as specified in its charter)

N/A

(Translation of Registrant’s name into English)

217 Queen Street West, Suite 303

Toronto, Ontario

M5V 0R2

Tel: 1-833-572-2333

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F ☐ Form 40-F ☒

EXHIBIT INDEX

Exhibit Number	Description

99.1	News Release dated December 3, 2025 - IsoEnergy Provides 2025 Athabasca Basin Exploration Update and Prepares to Launch Winter Exploration Programs Including Drilling at Larocque East

SIGNATURES

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

Source: View Original Filing on SEC EDGAR