United States Antimony (UAMY) moves 576 tons of 10% ore at over 2x 2025 pace
Rhea-AI Filing Summary
United States Antimony Corporation (UAMY) reported an operational update on its Stibnite Hill, Montana mine. Since restarting mining in April 2026, the company has transported 42 truckloads of stibnite ore, averaging about 14 tons per truck with approximately 10% antimony content, totaling roughly 576 tons of high-grade ore in the 2026 campaign.
Current operations are running at about three truckloads per operating day, or roughly 42 tons of ore per day, which the company states is more than two times faster than its 2025 campaign, when about 800 tons were moved over 45 days. Ore from Stibnite Hill is processed at the Radersburg, Montana flotation mill and then smelted in Montana or Mexico into finished antimony products. Management characterizes this progress as part of a strategy to expand domestically sourced antimony feedstock and reduce reliance on third-party and foreign ore purchases.
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Filing Explained
The August 25 Form 8-K furnishes the mining update under Item 7.01; the company states that the report and its press-release exhibit are not deemed filed for Section 18 purposes or incorporated by reference into other filings, except where expressly stated.
8-K Event Classification
Key Figures
Key Terms
stibnite ore technical
flotation mill technical
antimony oxide technical
antimony trisulfide technical
zeolite technical
forward-looking statements regulatory
FAQ
What did UAMY announce about its Stibnite Hill, Montana mining operations?
How does UAMY’s 2026 Stibnite Hill mining rate compare with 2025?
How much ore has UAMY moved from Stibnite Hill in 2026 so far?
What is the antimony grade of UAMY’s 2026 Stibnite Hill ore?
Where does UAMY process ore from Stibnite Hill?
What strategic goal does UAMY link to the Stibnite Hill operations?
When did UAMY restart mining at Stibnite Hill for the 2026 campaign?
AI-generated analysis. How Rhea-AI works. Not financial advice.
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM
CURRENT REPORT
Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934
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Item 7.01 Regulation FD Disclosure.
On August 25, 2026, United States Antimony Corporation (“USAC”, “US Antimony”, or the “Company”) issued a press release reporting an update on the Company’s mining results at its Stibnite Hill, Montana location. This press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.
The foregoing disclosure is qualified in its entirety by the full text of the Press Release.
A copy of the Press Release is attached as Exhibit 99.1 and is hereby incorporated by reference into this Item 7.01. The information contained in this Current Report on Form 8-K, including Exhibit 99.1 furnished herewith, is being furnished and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section and shall not be deemed incorporated by reference into any filing under the Exchange Act or the Securities Act of 1933, as amended, regardless of any general incorporation language in such filing, except to the extent expressly stated in such filing.
Cautionary Note Regarding Forward-Looking Statements
This Current Report on Form 8-K, including the Press Release furnished as Exhibit 99.1 to 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.
| Exhibit No. | Description | |
| 99.1 | Press Release issued by United States Antimony Corporation dated August 25, 2026 | |
| 104 | Cover Page Interactive Data File (embedded with 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.
| UNITED STATES ANTIMONY CORPORATION | ||||
| Dated: | August 25, 2026 | By: | /s/ Shawn P. Winkler | |
| Shawn P. Winkler | ||||
| Interim Chief Financial Officer | ||||
Exhibit 99.1
United States Antimony Provides Update on
Mining Success at Stibnite Hill, Montana
“The Critical Minerals and ZEO Company”
~ Antimony, Gold, Tungsten, and Zeolite ~
DALLAS, TX / ACCESS Newswire / August 25, 2026 / United States Antimony Corporation (“USAC,” “US Antimony,” or the “Company”), (NYSE: UAMY) (NYSE Texas: UAMY), a leading producer and processor of antimony, zeolite, and other critical minerals, and the only fully integrated antimony company in the world outside of China and Russia, is pleased to announce the successful continuation of mining operations at its Stibnite Hill property in Thompson Falls, Montana.
Since resuming mining operations this past spring in April, USAC has continued to advance its domestic antimony mining program at Stibnite Hill in Montana. To-date in 2026, the Company has transported 42 truckloads of stibnite ore from the mine, averaging approximately 14 tons per truck and approximately 10% antimony content. This represents approximately 576 tons of high-grade stibnite ore transported from Stibnite Hill during the current 2026 mining campaign.
Mining and haulage operations are currently progressing at a rate of approximately three truckloads per operating day, or approximately 42 tons of ore per day. The current pace represents a significant increase compared with the Company's 2025 mining campaign, when USAC transported approximately 800 tons of antimony ore over a 45-day period. At its present operating rate, the 2026 campaign is moving ore down the mountain at over two times faster than last year's daily rate.
Material mined at Stibnite Hill is transported for processing to the Company's Radersburg, Montana flotation mill, with the resulting antimony concentrate then being shipped to either USAC's Thompson Falls smelter or the Madero smelter located in Mexico for conversion into finished antimony products, including mill spec material.
The continued progress at Stibnite Hill represents another important step in USAC's previously announced strategy to expand its access to domestically sourced antimony feedstock and begin reducing its reliance on third-party and foreign ore purchases. The Company restarted mining operations at Stibnite Hill in April 2026 after winter weather brought the previous year's campaign to a close in November 2025.
Commenting on the current mining operations at Stibnite Hill, Montana, Mr. Joseph Bardswich, P.E., Executive Vice President and Chief Mining Engineer, stated “We continue to improve our operations on Stibnite Hill by moving rock off the mountain over twice as fast as we did last year. Our contractors are becoming more efficient and we are fortunate to be able to continue mining antimony within the vein systems we have been excavating. We anticipate accomplishing similar results soon in Alaska.”
About USAC:
United States Antimony Corporation and its subsidiaries in the U.S., Mexico, and Canada ("USAC," “U.S. Antimony,” the "Company," "Our," "Us," or "We") sell antimony, zeolite, and precious metals primarily in the U.S., Mexico, and Canada. The Company mines, purchases, and processes ore primarily into antimony oxide, antimony metal, antimony trisulfide, and precious metals at its facilities located in Montana and Mexico. Antimony oxide is used to form a flame-retardant system for plastics, rubber, fiberglass, textile goods, paints, coatings, and paper, as a color fastener in paint, and as a phosphorescent agent in fluorescent light bulbs. Antimony metal is used in bearings, storage batteries, and ordnance. Antimony trisulfide is used as a primer in ammunition. The Company also recovers precious metals, primarily gold and silver, at its Montana facility from third party ore. At its Bear River Zeolite (“BRZ”) facility located in Idaho, the Company mines and processes zeolite, a group of industrial minerals used in water filtration, sewage treatment, nuclear waste and other environmental cleanup, odor control, gas separation, animal nutrition, soil amendment and fertilizer, and other miscellaneous applications. Beginning in 2024 and continuing in 2025, the Company acquired mining claims, real properties (patented claims) and leases located in Alaska, Montana, and Ontario, Canada in an effort to reduce the cost of third-party antimony ore purchases and to expand its product offerings.
Learn more about United States Antimony Corporation at www.usantimony.com.
Forward-Looking Statements:
This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including, without limitation, statements regarding the Company’s future operations, production levels, financial performance, business strategy, market conditions, demand for antimony, zeolite, other critical minerals, and precious metals, expected costs, and other statements that are not historical facts. These statements are based on current expectations, estimates, forecasts, and projections about the industries in which the Company operates, as well as management’s beliefs and assumptions. Words such as “anticipates,” “expects,” “intends,” “plans,” “believes,” “seeks,” “estimates,” “may,” “will,” “should,” “could,” and variations of these words or similar expressions are intended to identify such forward-looking statements.
Forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those indicated in such statements, including, but not limited to: fluctuations in the market prices and demand for antimony and zeolite; changes in domestic and global economic conditions; operational risks inherent in mining and mineral processing; geological or metallurgical conditions; availability and cost of energy, equipment, transportation, and labor; the Company’s ability to maintain or obtain permits, licenses, and regulatory approvals; changes in environmental and mining laws or regulations; competitive factors; the impact of geopolitical developments; and the effects of weather, natural disasters, or health pandemics on operations and supply chains. Additional information regarding risk factors that could cause actual results to differ materially is included in the Company’s filings with the U.S. Securities and Exchange Commission, including its Annual Report on Form 10-K and Quarterly Reports on Form 10-Q.
The Company undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by law. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof.
| Investor Relations Contact: | Media Relations Contact: |
| Jonathan Miller, VP, Investor Relations | Anthony D. Andora |
| 4438 W. Lovers Lane, Unit 100 | Edge Consulting, Inc. |
| Dallas, Texas 75209 | 1560 Market Street, Ste. 701 |
| E-Mail: Jmiller@usantimony.com | Denver, Colorado 80202 |
| Phone: 406-606-4117 | E-Mail: Anthony@EdgeConsultingSolutions.com |
| Phone: 720-317-8927 |