United States Antimony Corp.: United States Antimony Corporation Provides Update on Mining Activities

"The Critical Minerals and ZEO Company"

~ Antimony, Gold, Tungsten, and Zeolite ~

DALLAS, TX / ACCESS Newswire / August 5, 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, announced today a company wide update on its mining activities located in Alaska, Montana, and Canada.

ALASKA

Active Alaska mining operations include:

• Ester Dome - an exploration stage project for antimony consisting of four individual claim blocks acquired in 2025 covering over 9,000 acres and located 7 miles from the Fairbanks airport;

• Stibnite Creek - 24 state mining claims were completed in an acquisition in October 2024 covering 3,840 acres. Located 160 miles southeast of Fairbanks;

• Maclaren River Area Properties - four properties acquired by claim staking in May 2024 (69 claims in total). These claims occur on the south flank of the Alaska Range, approximately 200 miles south of Fairbanks.

• True North Claims - State mining claims staked by the Company in 2026, located 8 miles north of the Fox Logistics Center (Fairbanks) consisting of 23 state mining claims (1,349 acres);

• Dome Creek Placer - 145 acres of patented mining claims located 7 miles north of Fox Logistics Center; and

• Nolan Creek - known gold/antimony deposit acquired in Trustee's sale.

Ester Dome Project

Ester Dome is an antimony exploration project area consisting of four property claim groups that aggregate greater than 9,000 acres. The center of the property is 7 miles from the Fairbanks airport. The basis of the exploration program is to evaluate the source of high antimony in soil, rock and drill holes reported by earlier gold exploration programs. The historical soil samples (more than 12,000 samples in the database) indicate high antimony content localized in 15 areas within the claims. Government geological reports published between 1910 and 1933 disclose that stibnite was encountered in several of the underground gold mines but was ignored or discarded due to low economic conditions for antimony, except during World War I and World War II.

Exploration of the Ester Dome property began when all permits were received September 22, 2025. Historical reports indicate that stibnite was intimately associated with gold mineralization in faults and veins. Accordingly, exploration is currently being conducted with an air track (A-T) drill and by trenching with an excavator to search for high-grade stibnite associated with antimony anomalies in the soils near historically productive quartz-gold vein systems and gravity anomalies previously identified during the 2025 exploration work program. The Company to-date has only investigated three of 15 target areas identified. USAC has a drilling program planned for up to 50 holes to be drilled beginning this summer. This area of Ester Dome has a history of high grade gold production dating back over 100 years.

Map showing the distribution of mining claims controlled at Ester Dome.

Nolan Creek (Antimony & Gold)

The company acquired the Nolan Creek property through a Trustee's Sale in a public auction on January 30, 2026. The property was previously owned by a private company who conducted exploration and mining of both placer and lode targets from surface and from an underground operation more than twenty years ago. An adit, collared near the bottom of a hillside connects to the antimony/gold vein structures via horizontal headings sufficiently large to provide access for modern mobile underground equipment. A technical report by Qualified Person, Tom Bundtzen, filed with Canadian Securities Regulators, and available to the public, reports an inferred reserve of 42,412 tons grading 28% Sb and 0.408 ounces Au per ton. That yields a gross per ton value of $8900 (at $4000/ounce gold and $13/pound antimony) and total gross value (without deducting mining, processing or transportation costs) of $377 million.

During the past week the company hosted pre-bid underground site inspection tours by two internationally recognized mining contractors in preparation for their submission of tenders in mid-August, for underground development and mining of this high grade material. The raw ore would be trucked to our Radersburg Mill for gravity and flotation recovery of both the antimony and the gold. Mining operations are planned to begin late this year.

MONTANA

Montana Stibnite Hill (Antimony)

The Stibnite Hill operation was initiated after acquisitions of the patented Eliza claim and BLM administered in October and November 2025, and at that time provided 50 truckloads (approximately 800 tons) of ore averaging 10% Sb (antimony) which were trucked to the mill that was recently acquired earlier this year by USAC (the "Radersburg Mill"}. Metallurgical test work indicates that this ore can be upgraded by froth flotation with the "top cut" meeting the high quality specifications for primers for ammunition while the balance will provide smelter feed to produce antimony metal ingots meeting the quality specifications required under our contract with the Defense Logistics Agency ("DLA"). After review by the Montana DEQ this past winter, USAC was requested to implement additional safeguard procedures at the excavation site, to control possible contamination of surrounding soils. The safeguard program has been approved and the excavation and trucking of the material to Radersburg resumed in late July with another 300 tons delivered to Radersburg to-date in 2026. A program of continual exploration and mining will continue until winter freeze up expected sometime in November.

CANADA

Fostung Deposit in Ontario (Tungsten)

The company has invited qualified bidders, including First Nation corporations, to submit proposals, with pricing, for the clearing, grubbing, earth excavation and cleaning to bedrock, percussion drilling and blasting of a readily accessible portion of the Fostung Deposit. All drill cuttings will be sampled and sent to the company's Radersburg, Montana laboratory for analysis, providing speedy turnaround of assay data to determine the grade of this bulk sample.

The follow-up phase of this planned work will be the on-site crushing and screening of the material and initial upgrading using gravity or ultra-violet methods, providing a bulk sample of at least 20,000 tons for further beneficiation and sale. Metallurgical testing, including gravity and flotation studies continue at Lakefield Research in Lakefield, Ontario and at the company's laboratory located in Radersburg.

Management Comments

Commenting on these USAC owned mining properties, Mr. Joseph Bardswich, P.E., Executive Vice President and Chief Mining Engineer, stated: "All of these regions began initial operations either last year or earlier this year subsequent to their acquisition. Because of their physical location, weather has always been a factor. However, progress has been made on all three regions where we are now or soon will be, moving critical mineral material to either our own processing centers or contracted third parties. The speed of this process is quite unusual in the mining sector. From evaluation, acquisition, permitting, contracting equipment, hiring personnel, establishing a base of operations, and including actual mining of critical mineral material are accomplishments that we are all very proud of achieving in such a short period of time, especially in these remote regions. Our field operating teams have accomplished these successes with only a $2.8 Million capital expenditure spend through June 30, 2026. While the Company is continuing to use 100% of its sourced antimony material procured from foreign sources, 2026 will be the first time we begin actually utilizing our own mined antimony ore to fulfill the contracted needs of our customers. Company mined antimony provides assurance as to composition, and supply, simpler logistics and a lower cost that allows for overall improved margins. There are certain companies publicizing their antimony mining plans by sometime in year 2029, in an effort to support demand from our U.S. military. USAC has been delivering these military grade ingots since June of this year in increasing monthly amounts."

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: [e-mail]	Denver, Colorado 80202
Phone: [phone]	E-Mail: [e-mail]
	Phone: [phone]

SOURCE: United States Antimony Corp.

View the original press release on ACCESS Newswire:
https://www.accessnewswire.com/newsroom/en/metals-and-mining/united-states-antimony-corporation-provides-update-on-mining-activities-1201626