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) April 10, 2026

Registrant’s telephone number, including area code: (406) 606-4117

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:

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 April 10, 2026, United States Antimony Corporation (the “Company”) provided an operational update on the Fostung Project, an intermediate-stage tungsten exploration asset located in Foster Township, Sudbury District, Ontario, approximately 8 kilometers (km) southeast of Espanola and approximately 70 km west-southwest of Sudbury, by making available its Technical Report Summary (“TRS”) on its Fostung Tungsten Property located in Ontario, Canada, with an effective date of January 31, 2026, which had been recently been prepared and completed in accordance with the requirements of subpart 1300 of Regulation S-K.  The TRS was completed by SRK Consulting (Canada), Inc., who is a “Qualified Person” as such term is defined in subpart 1300 of Regulation S-K. The Fostung project comprises 50 contiguous single-cell mining claims covering 1,109 hectares (ha) and hosts a skarn-type tungsten deposit (scheelite) with associated molybdenum, copper, and silver mineralization.

The Fostung Project is directly owned by UAMY Cobalt Corporation (“UAMY Cobalt”). UAMY Cobalt is a wholly owned subsidiary of the Company.

For a complete description of the Fostung Project, see the TRS, which is filed as Exhibit 99 to this Current Report on Form 8-K and is incorporated herein by reference.

Cautionary Note Regarding Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking statements. Forward-looking statements reflect management’s current knowledge, assumptions, judgment, and expectations regarding future performance or events. Although management believes that the expectations reflected in such statements are reasonable, they give no assurance that such expectations will prove to be correct, and you should be aware that actual events or results may differ materially from those contained in the forward- looking statements. Words such as "will," "expect," "intend," "plan," "potential," "possible," "goals," "accelerate," "continue," and similar expressions identify forward-looking statements.

Forward-looking statements are subject to a number of risks and uncertainties including, but not limited to, those described in the Company’s filings on Form 10-K, Form 10-Q, and Form 8-K with the United States Securities and Exchange Commission.

All forward-looking statements are expressly qualified in their entirety by this cautionary notice. You should not rely upon any forward-looking statements as predictions of future events. The Company undertakes no obligation to revise or update any forward-looking statements made in this Current Report on Form 8-K to reflect events or circumstances after the date hereof, to reflect new information or the occurrence of unanticipated events, to update the reasons why actual results could differ materially from those anticipated in the forward-looking statements, in each case, except as required by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

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.