&#34;The Critical Minerals and ZEO Company&#34;~ Antimony, Gold, Tungsten, and Zeolite ~ DALLAS, TX / ACCESS Newswire / August 25, 2026 / United States Antimony Corporation (&#34;USAC,&#34; &#34;US Antimony,&#34; or the

<p><i><strong>"The Critical Minerals and ZEO Company"</strong></i></p><p><i><strong>~ Antimony, Gold, Tungsten, and Zeolite ~</strong></i></p> <p><strong id="dateline">DALLAS, TX / <a href='https://www.accessnewswire.com/'>ACCESS Newswire</a> / August 25, 2026 / </strong>United States Antimony Corporation ("USAC," "US Antimony," or the "Company"), (NYSE:<a class="ticker" href="https://www.benzinga.com/quote/UAMY">UAMY</a>)(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.</p><p>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.</p><p>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.</p><p>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.</p><p>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.</p><p>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."</p><a href="https://app.accessnewswire.com/imagelibrary/f9323486-d5dc-45a1-88c4-654aa42fd661/1211665/stibnitehillvein.jpg" rel="nofollow"><img style="width:481px;text-align:center;margin:0.9em auto;" src="https://app.accessnewswire.com/imagelibrary/f9323486-d5dc-45a1-88c4-654aa42fd661/1211665/stibnitehillvein.jpg"></a><figcaption><i>Caption: An exposed stibnite vein under excavation at USAC's Stibnite Hill mine near Thompson Falls, Montana.</i></figcaption><div> </div><p><strong>About USAC:</strong></p><p>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.</p><p>Learn more about United States Antimony Corporation at <a rel="nofollow" href="https://pr.report/phok">www.usantimony.com</a>.</p><p><strong>Forward-Looking Statements:</strong></p><p>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.</p><p>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.</p><p>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.</p><p><strong>Investor Relations Contact:</strong></p><p>Jonathan Miller, VP, Investor Relations<br/>United States Antimony Corporation<br/>4438 W. Lovers Lane, Unit 100<br/>Dallas, Texas 75209<br/>Phone: 406-606-4117<br/>Email: <a rel="nofollow" href="mailto:Jmiller@usantimony.com">Jmiller@usantimony.com</a></p><p><strong>Media Relations Contact:</strong></p><p>Anthony D. Andora<br/>Edge Consulting, Inc.<br/>1560 Market Street, Ste. 701<br/>Denver, Colorado 80202<br/>Phone: 720-317-8927<br/>Email: <a rel="nofollow" href="mailto:Anthony@EdgeConsultingSolutions.com">Anthony@EdgeConsultingSolutions.com</a></p><p><strong>SOURCE: </strong>United States Antimony Corporation</p><br/><br/>View the original <a href='https://www.accessnewswire.com/newsroom/en/metals-and-mining/united-states-antimony-provides-update-on-mining-success-at-stibnite-hill-montana-1211665'>press release</a> on ACCESS Newswire<br/><br/>
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UAMY

United States Antimony Provides Update on Mining Success at Stibnite Hill, Montana

USAC's Stibnite Hill ramp accelerates 2026 domestic antimony supply expansion

<section class="insight" data-version="1">
  <section data-block="information">
    <h3>Information</h3>
    <p>&amp;#34;The Critical Minerals and ZEO Company&amp;#34;~ Antimony, Gold, Tungsten, and Zeolite ~ DALLAS, TX / ACCESS Newswire / August 25, 2026 / United States Antimony Corporation (&amp;#34;USAC,&amp;#34; &amp;#34;US Antimony,&amp;#34; or the</p>
  </section>

  <section data-block="ai-summary-paragraph">
    <h3>AI Summary</h3>
    <p>USAC reported continued mining at Stibnite Hill in Montana with a 2026 pace well ahead of 2025, moving about 576 tons from 42 truckloads so far. The ramp supports its strategy to expand domestically sourced antimony feedstock and cut third-party purchases, potentially boosting near-term production and margins as ore is processed locally and shipped to Thompson Falls or Madero. Positive near-term implications could arise for USAC&#039;s supply chain resilience and sales trajectory in 2026.</p>
  </section>

  <section data-block="ai-summary-bullets">
    <h3>Key Points</h3>
    <ul><li>USAC continues mining at Stibnite Hill; 2026 pace up vs 2025.</li><li>To date in 2026, 42 truckloads transported. ~576 tons total.</li><li>Mining rate ~3 truckloads daily (42 tons). Over twofold last year&#039;s daily rate.</li><li>Ore processed at Radersburg mill; concentrates sent to Thompson Falls or Madero for finish.</li><li>Strategy: expand domestically sourced feedstock; reduce reliance on third-party ore.</li></ul>
  </section>

  <section data-block="companies-mentioned">
    <h3>Companies Mentioned</h3>
    <ul><li><strong>United States Antimony Corporation (UAMY)</strong>: Primary focus; 2026 Stibnite Hill ramp supports domestic feedstock expansion and potential margin uplift.</li><li><strong>Thompson Falls Smelter (N/A)</strong>: Receives USAC concentrate; capacity and pricing dynamics could influence realized antimony revenue.</li><li><strong>Madero Smelter (N/A)</strong>: Mexico-based processing option for finished antimony products; volume throughput affects cash flow.</li><li><strong>Bear River Zeolite Facility (N/A)</strong>: Idaho facility part of product mix; diversification may impact revenue mix.</li></ul>
  </section>

  <section data-block="category">
    <h3>Corporate Developments</h3>
    <p>Category: Corporate Developments. The memo centers on operational progress and strategic shift to domestic feedstock, which could influence costs, production yields, and future earnings visibility rather than an immediate earnings surprise.</p>
  </section>

  <section data-block="market-moving">
    <h3>Market-Moving</h3>
    <ul><li>Domestic feedstock expansion could lower input costs and improve margins if sustained.</li><li>Faster mining rate may lift near-term ore shipments and revenue riffing on processing capacity.</li><li>Potential Alaska activity hints at longer-term production growth and optionality.</li></ul>
  </section>

  <section data-block="key-facts">
    <h3>Key Facts</h3>
    <ul><li>42 truckloads of stibnite ore moved in 2026; ~14 tons per truck; ~10% antimony content.</li><li>Total ~576 tons of high-grade ore moved so far in 2026.</li><li>Current pace ~3 truckloads per day (~42 tons/day).</li><li>2025 campaign moved ~800 tons over 45 days; 2026 pace &gt;2x last year&#039;s daily rate.</li><li>Ore processed at Radersburg flotation mill; concentrate sent to Thompson Falls or Madero smelters.</li></ul>
  </section>

  <section data-block="trading-thesis">
    <h3>Trading Thesis</h3>
    <p>Near-term upside for UAMY on faster ore extraction and domestic supply expansion, likely within 3–6 months.</p>
  </section>
</section>


<p><i><strong>"The Critical Minerals and ZEO Company"</strong></i></p><p><i><strong>~ Antimony, Gold, Tungsten, and Zeolite ~</strong></i></p> <p><strong id="dateline">DALLAS, TX / <a href='https://www.accessnewswire.com/'>ACCESS Newswire</a> / August 25, 2026 / </strong>United States Antimony Corporation ("USAC," "US Antimony," or the "Company"), (NYSE:<a class="ticker" href="https://www.benzinga.com/quote/UAMY">UAMY</a>)(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.</p><p>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.</p><p>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.</p><p>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.</p><p>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.</p><p>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."</p><a href="https://app.accessnewswire.com/imagelibrary/f9323486-d5dc-45a1-88c4-654aa42fd661/1211665/stibnitehillvein.jpg" rel="nofollow"><img style="width:481px;text-align:center;margin:0.9em auto;" src="https://app.accessnewswire.com/imagelibrary/f9323486-d5dc-45a1-88c4-654aa42fd661/1211665/stibnitehillvein.jpg"></a><figcaption><i>Caption: An exposed stibnite vein under excavation at USAC's Stibnite Hill mine near Thompson Falls, Montana.</i></figcaption><div> </div><p><strong>About USAC:</strong></p><p>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.</p><p>Learn more about United States Antimony Corporation at <a rel="nofollow" href="https://pr.report/phok">www.usantimony.com</a>.</p><p><strong>Forward-Looking Statements:</strong></p><p>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.</p><p>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.</p><p>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.</p><p><strong>Investor Relations Contact:</strong></p><p>Jonathan Miller, VP, Investor Relations<br/>United States Antimony Corporation<br/>4438 W. Lovers Lane, Unit 100<br/>Dallas, Texas 75209<br/>Phone: 406-606-4117<br/>Email: <a rel="nofollow" href="mailto:Jmiller@usantimony.com">Jmiller@usantimony.com</a></p><p><strong>Media Relations Contact:</strong></p><p>Anthony D. Andora<br/>Edge Consulting, Inc.<br/>1560 Market Street, Ste. 701<br/>Denver, Colorado 80202<br/>Phone: 720-317-8927<br/>Email: <a rel="nofollow" href="mailto:Anthony@EdgeConsultingSolutions.com">Anthony@EdgeConsultingSolutions.com</a></p><p><strong>SOURCE: </strong>United States Antimony Corporation</p><br/><br/>View the original <a href='https://www.accessnewswire.com/newsroom/en/metals-and-mining/united-states-antimony-provides-update-on-mining-success-at-stibnite-hill-montana-1211665'>press release</a> on ACCESS Newswire<br/><br/>
      <img src="https://app.accessnewswire.com/img.ashx?id=1211665" width="0" height="0"/>

USAC reported continued mining at Stibnite Hill in Montana with a 2026 pace well ahead of 2025, moving about 576 tons from 42 truckloads so far. The ramp supports its strategy to expand domestically sourced antimony feedstock and cut third-party purchases, potentially boosting near-term production and margins as ore is processed locally and shipped to Thompson Falls or Madero. Positive near-term implications could arise for USAC's supply chain resilience and sales trajectory in 2026.

News insight

United States Antimony Provides Update on Mining Success at Stibnite Hill, Montana

AI summary

Sentiment rationale

Key facts

Corporate Developments