US Antimony Bolivia Processing Facility Expands the Western Antimony Supply Chain

US Antimony, Bolivia plant

The US Antimony Bolivia processing facility could strengthen one of the West’s most constrained critical mineral chains. US Antimony said it helped develop a hydrometallurgical facility in Bolivia to refine antimony and other critical minerals at commercial scale. The company will be the sole recipient of processed antimony flake from the site. As a result, the US Antimony Bolivia processing facility may become an important upstream support point for western antimony supply.

This development matters because antimony remains strategically sensitive and commercially tight. US Antimony expects the higher-quality flake from Bolivia to raise throughput at its Thompson Falls smelter in Montana. The company plans to receive an initial 150-metric-tonne shipment in February or March. Therefore, the US Antimony Bolivia processing facility is not just a technology project. It is already linking directly to near-term metal and trioxide production.

The agreement also gives US Antimony more than supply access. The company secured the exclusive right to duplicate the Bolivian hydrometallurgical process in North America and Australia. That means the US Antimony Bolivia processing facility could serve as a template for wider regional expansion. Consequently, the project may help create a more scalable western antimony processing model.

Hydrometallurgical Antimony Processing Offers a Faster Route to Capacity Growth

Hydrometallurgical antimony processing is becoming the most important strategic feature of this deal. US Antimony said the Bolivian facility expanded output 15-fold since it began funding the site in mid-2025. That rise suggests the processing route can scale quickly when supported with capital and feedstock. As a result, hydrometallurgical antimony processing may offer a more flexible alternative to slower traditional capacity build-outs.

The feedstock base also supports the project’s commercial relevance. The facility uses stibnite concentrate or tetrahedrite concentrate to produce antimony. That flexibility matters because diversified feed options can improve plant utilisation and reduce procurement risk. Meanwhile, the company noted that similar methods and equipment could also refine other critical minerals. Therefore, the process may carry broader value beyond antimony alone.

This model fits the current strategic environment in critical minerals. Governments and processors increasingly want smaller, faster, and more adaptable refining assets. Large mining projects still matter, but midstream processing gaps often create the real bottlenecks. Consequently, hydrometallurgical antimony processing may attract stronger attention from both policymakers and investors.

Western Antimony Supply Chain Ambitions Are Moving Toward Domestic Replication

Western antimony supply chain strategy now appears to be shifting from dependence toward duplication. US Antimony said it expects to develop one or more hydrometallurgical facilities in the United States in the near future. Those sites would likely be located in the western continental US and or Alaska. Therefore, the company is clearly aiming to regionalise the process rather than rely on Bolivia alone.

Funding plans reinforce that ambition. US Antimony requested $44mn from the US Department of Energy for a US hydrometallurgical facility. It also plans to seek Department of Defense support for another location near Montana. That combination suggests the company sees antimony as both a commercial opportunity and a strategic materials priority. As a result, the western antimony supply chain could gain a stronger domestic processing base if funding is secured.

The broader implication is significant for critical minerals markets. Antimony has often been discussed as a supply risk, but less often as a processing challenge. This project changes that framing by focusing on conversion capacity and material quality. If US Antimony can replicate the Bolivian model successfully, it may move from being a niche processor to a more important builder of western antimony supply resilience.

The Metalnomist Commentary

This story matters because it is about process control as much as metal supply. US Antimony is trying to turn one successful hydrometallurgical model into a repeatable western platform. If that strategy works, antimony could become a rare example of a critical mineral chain that improves through midstream replication rather than waiting for major new mines.

US Antimony DLA contract strengthens US strategic antimony supply

US Antimony

US Antimony DLA contract marks a major step in rebuilding North America’s antimony supply chain and defense resilience. The five-year, fixed-price US Antimony DLA contract is worth up to $245mn and targets nearly 6.7mn lbs of metal. As a result, the US Antimony DLA contract positions the company as the core domestic supplier for this critical mineral.

DLA moves to secure domestic antimony for the stockpile

The US Defense Logistics Agency awarded US Antimony a contract to supply ingots for the National Defense Stockpile. Deliveries will go to the Scotia Depot in New York, with first shipments expected this week under the multi-year framework. The tender directly cited US Antimony as the only source of qualifying domestic-grade material, underscoring its unique position.

US Antimony operates the only two antimony smelters in North America, in Montana and at Madero in Mexico. The Madero smelter reopened in April, restoring additional regional capacity for processed antimony products. Together, these assets give the company integrated upstream and midstream control from ore to ingot.

Antimony’s role in defense and critical minerals strategy

Antimony is a core ingredient in many strategic and military applications, especially for alloys and flame retardants. It is used in batteries, cables and specialized defense components, making secure supply a national priority. Therefore, the contract fits into Washington’s broader push to rebuild domestic and allied capacity for critical minerals.

The DLA has expanded its National Defense Stockpile purchases across several critical minerals this year. Recent tenders and RFIs have targeted cobalt, bismuth, high-purity aluminum, scandium flake, niobium and ferro-niobium. This portfolio approach aims to reduce dependence on unstable or adversarial foreign sources.

Market implications for antimony and strategic metals

The US Antimony DLA contract sends a strong demand signal to antimony markets and potential investors. Long-term, fixed-price offtake can support capital spending, operational stability and potential future expansions. Meanwhile, the contract highlights the value of having permitted, operating smelter capacity in politically stable jurisdictions.

Global antimony supply remains concentrated, with China still dominating mine output and processing. As a result, Western buyers increasingly seek diversified supply chains, including North American and allied producers. US Antimony’s position as the only North American smelter operator makes it a central part of this shift.

The Metalnomist Commentary

This deal effectively transforms US Antimony from a niche smelter into a strategic asset for US defense planners. For the broader critical minerals sector, it signals that long-dated government offtake contracts may become a key financing tool for non-Chinese supply.

US Antimony capital raise funds growth in critical minerals

US Antimony

US Antimony capital raise plans signal an aggressive push into the US critical minerals supply chain. The company aims to secure $25mn by selling around 2.4mn shares to a mutual fund, adding to substantial capital injections in August and earlier this month. As a result, the US Antimony capital raise will underpin inventory expansion, smelting upgrades and potential acquisitions at a pivotal moment for US defence-focused metals.

US Antimony capital raise supports defence stockpile and smelter expansion

The US Antimony capital raise directly supports its five-year, fixed-price contract with the US Defense Logistics Agency. The firm plans to use proceeds to acquire additional antimony inventory and expand existing leaseholds in Alaska and Montana, reinforcing upstream security of supply. At the same time, management will expand the Madero smelter in Mexico and evaluate acquisitions of other critical minerals companies. Together, these steps align with Washington’s push to localise and friend-shore strategic metal supply chains.

Meanwhile, the latest equity deal follows roughly $18mn raised in August and nearly $26.3mn earlier this month. This rapid sequence of financings shows investors are willing to back a scale-up strategy anchored by long-term government demand. It also gives US Antimony flexibility to deploy capital across mining, processing and potential M&A rather than relying on a single asset bet.

Building a vertically aligned US antimony supply chain

US Antimony has positioned itself at the heart of efforts to rebuild a fully integrated US antimony supply chain. The DLA contract, worth up to $245mn over five years, provides predictable offtake for antimony ingots headed into the national defence stockpile. Therefore, the US Antimony capital raise can be viewed as growth equity tied to a visible revenue base rather than speculative greenfield risk.

However, execution risks remain around smelter expansion, permitting and integrating any acquired critical minerals businesses. The company must also navigate volatile antimony prices and competing capital needs across Alaska, Montana and Mexico. Even so, a reinforced balance sheet and contracted government demand leave US Antimony better placed than many peers to weather market cycles.

The Metalnomist Commentary

US Antimony’s latest capital raise underlines how defence-linked offtake can unlock substantial private funding for critical minerals. If management successfully converts this cash into reliable mine-to-ingot capacity, the company could become a cornerstone of US antimony security. For other strategic metals developers, the model highlights the value of long-dated government contracts in de-risking large equity raises.

US Antimony Processing Plant in Idaho Strengthens North American Sb Supply Chain

Americas Gold and Silver

The US antimony processing plant planned in Idaho marks a significant step for North American critical minerals security. US Antimony and Americas Gold and Silver formed a joint venture to develop a hydrometallurgical antimony facility at the Galena complex in Idaho. The project links local feedstock, processing capacity, and downstream marketing. As a result, the US antimony processing plant could strengthen domestic supply for both industry and defense.

This matters because antimony remains a strategically sensitive metal with limited western processing capacity. Americas will sell antimony feedstock from Galena to the joint venture for processing. US Antimony will then purchase the antimony produced at the plant. Therefore, the US antimony processing plant creates a more integrated domestic flow from mine to refined product.

The structure of the partnership also looks deliberate. Americas will own 51pc of the venture, while USAC will hold 49pc. Feed from the Galena site will receive priority, although the facility may also accept other sources later. Consequently, Idaho antimony processing could become a flexible platform rather than a single-mine solution.

Idaho Antimony Processing Builds on Existing USAC Expertise

Idaho antimony processing gains credibility because USAC already has operating experience in this market. The company runs the only two antimony smelters in North America, including the Thompson Falls facility in Montana. It also said earlier this year that it helped develop a hydrometallurgical antimony facility in Bolivia. As a result, the joint venture starts with more technical depth than a typical greenfield concept.

That expertise matters because hydrometallurgical processing is not just a construction task. It requires operating knowledge, feed handling discipline, and product quality control. USAC said it will contribute knowledge and technical expertise to the venture. Therefore, the project has a stronger chance of moving from concept to workable industrial asset.

North American Antimony Supply Gains a Stronger Defense Link

North American antimony supply also gains a clear defense connection through this project. USAC said it can provide the joint venture access to its marketing network, including the US government. That creates a direct link between new processing capacity and strategic buyers. Consequently, the Idaho project could matter well beyond commercial metals trade.

That defense angle is already real. USAC secured a five-year fixed-price contract worth up to $245mn to supply antimony ingots to the US Defense Logistics Agency. The new joint venture has also prepared paperwork to pursue government funding. Therefore, the US antimony processing plant fits directly into a larger effort to rebuild critical mineral capacity in North America.

The Metalnomist Commentary

This project matters because it connects mine feed, processing, and defense demand in one structure. Antimony supply security will not improve through mining alone. It needs real domestic processing, and Idaho now looks like one of the more serious new steps in that direction.

US Antimony Smelter Expansion Delay Tests Domestic Antimony Supply Strategy

USAC

US Antimony smelter expansion delays are testing the pace of America’s effort to rebuild domestic antimony processing capacity. US Antimony expects completion of the Thompson Falls smelter expansion in Montana to be delayed after supplier and third-party setbacks affected construction work.

The delay matters because Thompson Falls is the only antimony smelter in the US. It is also one of only two North American antimony smelting assets operated by the company, alongside the Madero smelter in Mexico.

US Antimony smelter expansion plans are designed to lift Thompson Falls capacity to more than 500 tonnes per month. That added capacity is central to the company’s 2026 revenue outlook and its ability to serve government and commercial contracts.

Thompson Falls Capacity Is Critical for US Defense Supply

Antimony is a strategic mineral used in flame retardants, alloys, ammunition, defense applications, batteries, and other industrial products. The Thompson Falls expansion therefore carries national security significance beyond ordinary smelter growth.

US Antimony has secured a five-year fixed-price contract worth up to $245 million to supply antimony ingots to the US Defense Logistics Agency for the national defense stockpile. The company expects to deliver its first $75 million of antimony ingots in 2026.

The company ended 2025 with a record 465 tonnes of processed and unprocessed antimony inventory, up from 78 tonnes a year earlier. Part of that inventory will support its DLA obligations while the company works to expand processing capacity.

Imported Feedstock Still Defines Near-Term Antimony Risk

US Antimony currently sources all of its antimony from international suppliers. That dependence shows why domestic mining claims in Montana and Alaska are strategically important to the company’s long-term supply position.

The company reacquired mining claims adjacent to its Montana smelting operations in July and also acquired claims in Alaska in January 2025. However, Alaska operations have faced delays from permitting issues and weather conditions.

Revenue more than doubled to $39.3 million in 2025 from $14.9 million in 2024, but losses widened to $4.3 million. This shows that growth is accelerating, but execution costs, expansion delays, and feedstock security remain key risks.

The Metalnomist Commentary

US Antimony smelter expansion is a test case for whether the US can convert critical mineral policy into real processing capacity. The company has the contracts and strategic relevance, but execution speed and domestic feedstock development will decide how much supply security it can actually deliver.

US Antimony Revenue Doubles as Critical Mineral Demand Surges

US Antimony

US Antimony Corporation achieved remarkable financial performance in the first quarter, with revenue more than doubling to $7 million compared to the same period last year. The mining and processing company's impressive growth reflects surging antimony prices and significant operational improvements across its North American facilities.

Strong Financial Performance Driven by Strategic Market Position

Antimony sales dominated the company's revenue stream, generating $5.9 million and accounting for approximately 84% of total quarterly revenue. This substantial increase transformed the company's financial outlook dramatically. Net income reached $546,524, a striking turnaround from the $322,768 loss recorded in the first quarter of 2023.

The company's success stems from its unique market position as the operator of North America's only two antimony smelters. This exclusive status provides US Antimony with significant competitive advantages in a market where antimony serves critical applications including flame retardants, military equipment, and lead-antimony alloys for batteries and cables.

Expansion Plans Signal Continued Growth Trajectory

US Antimony expects second quarter revenue to climb further following the April restart of its Madero smelter in Mexico. Meanwhile, the company announced ambitious expansion plans for its Montana facility, targeting a six-fold capacity increase to 300 tons per month. These operational enhancements position the company to capitalize on growing demand for this critical mineral.

Therefore, the company's strategic acquisitions continue to strengthen its supply chain. US Antimony plans to begin sourcing antimony ore from Alaska in the second quarter, following its $5.25 million acquisition of additional antimony mining claims in Alaska during January. This vertical integration strategy reduces supply chain risks while expanding production capabilities.

However, the company's smaller zeolite division remains a minor revenue contributor compared to its core antimony operations. As a result, US Antimony's growth strategy focuses primarily on expanding antimony production capacity and securing additional ore sources.

The Metalnomist Commentary

US Antimony's exceptional Q1 performance underscores the critical importance of domestic mineral processing capabilities amid global supply chain uncertainties. The company's monopolistic position in North American antimony smelting, combined with strategic capacity expansions, positions it to capitalize on sustained demand for this essential defense and industrial mineral.

US Antimony Restarts Madero Smelter to Resume Antimony Processing

US Antimony

Focus Keyphrase: US Antimony Madero smelter

US Antimony Madero smelter operations have officially resumed after a year-long shutdown, signaling renewed momentum in the North American antimony supply chain. The Montana-based company began processing imported antimony ore at its facility in Coahuila, Mexico, following delays at customs.

The restarted Madero smelter received its first shipment of ore from international sources in late March. Despite a two-week customs delay, processing is now underway, with additional shipments scheduled to arrive in the coming weeks.

Restart Follows Year of Operational Suspension

US Antimony halted operations at the smelter in March 2024 due to financial and operational challenges. These included underperformance, negative cash flow, and logistical issues related to sourcing and processing ore.

The current restart suggests improved market conditions and a revised operational strategy to better align with commercial goals. This could help the company meet growing demand for antimony, a critical mineral used in flame retardants, batteries, and defense applications.

Antimony Supply Chain Gaining Renewed Focus

The US Antimony Madero smelter restart aligns with wider efforts to strengthen North American supply chains for critical minerals. Antimony, included in the U.S. critical minerals list, faces limited domestic production and high import dependence.

By reactivating its smelting capabilities, US Antimony may help diversify supply while contributing to national resource security. The next shipments and consistent throughput will be key indicators of long-term viability for the restarted facility.

The Metalnomist Commentary

The Madero smelter restart is a noteworthy move toward restoring regional refining capacity for antimony. If operational consistency is maintained, US Antimony could play a key role in mitigating reliance on foreign antimony supplies.

US Antimony Montana Smelter Expansion to Boost Domestic Critical Mineral Processing

US Antimony

Capacity to Increase Six-Fold Amid Strategic Demand for Antimony

The US Antimony Montana smelter expansion marks a significant step in strengthening America’s domestic critical mineral infrastructure. US Antimony announced plans to increase capacity six-fold to 300 tons/month, reinforcing its role as the only operational antimony smelter in the United States. The $15 million project will support growing demand across flame retardants, defense applications, and lead-alloy battery manufacturing.

Domestic Processing Capabilities Get a Strategic Boost

The US Antimony Montana smelter expansion is particularly timely, given rising geopolitical interest in critical mineral self-sufficiency. Antimony plays a key role in military-grade materials and energy storage, making local refining capacity strategically vital. The company also restarted its Madero smelter in Mexico earlier this month, signaling broader regional efforts to scale up antimony processing in North America.

Investment Reflects Long-Term Critical Mineral Prioritization

The Montana expansion supports U.S. government goals under the Defense Production Act and various critical minerals strategies aimed at reducing import dependence. As China dominates global antimony supply chains, initiatives like the US Antimony Montana smelter expansion enhance national resilience while meeting industrial and defense-related demand.

The Metalnomist Commentary

The US Antimony Montana smelter expansion underscores a pivotal reshoring trend in the U.S. critical minerals sector. As antimony remains essential for both civilian and military supply chains, expanding domestic smelting capacity is a strategic and economic imperative.

US Antimony to Source Ore from Alaska to Strengthen Domestic Supply Chain

US Antimony Corporation (USAC)

US Antimony’s move to tap Alaskan antimony ore marks a significant step toward reducing reliance on foreign sources.

US Antimony Corporation (USAC) is making a strategic move to strengthen its domestic supply chain by sourcing antimony ore from its Alaskan mining claims. Starting in the second quarter, USAC will supply its Montana smelter with ore extracted from its newly acquired properties in Alaska. This marks the first time the Texas-based company has utilized domestically sourced feedstock for its operations, positioning it to reduce its dependency on foreign antimony supplies.

Strategic Move to Alaska

Over the past year, USAC purchased more than 210 mining claims covering approximately 33,000 acres in Alaska. These properties are known to contain significant antimony deposits, though past mining efforts in the region have focused primarily on gold, silver, and other metals. By tapping into these lesser-exploited deposits, USAC plans to support its smelting operations, primarily at its Thompson Falls facility in Montana. The proximity of these mining sites to existing infrastructure, including active mines, will facilitate a faster and more efficient supply chain for the company.

Implications for US Supply Chain and Onshoring Efforts

This move aligns with broader efforts by the US government to reduce reliance on foreign critical minerals, particularly from China. In January, President Donald Trump signed an executive order aimed at accelerating the permitting process for mining projects in Alaska. The strategic importance of reducing dependency on foreign sources of critical minerals, such as antimony, has been underscored by recent global supply chain disruptions, including China’s decision to restrict its antimony exports.

USAC’s plan includes gradually ramping up its ore extraction, eventually reaching 1,000 metric tonnes per month. This volume would supply both the Thompson Falls smelter and the company’s Madero smelter in Mexico. However, initial shipments from Alaska are expected to be modest, with volumes ranging from 100 to 200 tonnes per month until USAC can expand its Montana smelting capacity. The company is also awaiting a grant from the Department of Defense to support this expansion.

Impact of China’s Antimony Export Restrictions

USAC’s push to source antimony ore domestically is further fueled by China’s decision to impose export bans on antimony and restrict shipments to other global markets. In 2024, China accounted for 63% of all antimony shipments to the US, as per the US Geological Survey. These restrictions have created a more favorable market for USAC and other domestic companies looking to meet the growing demand for antimony. The company anticipates that high prices for antimony will persist due to the global shortage of this critical mineral, compounded by efforts to onshore mineral supplies to the US and other Western nations.

Conclusion

USAC’s decision to source antimony ore from its Alaskan mining claims represents a critical step in securing a reliable and domestically sourced supply of this vital mineral. As the US government continues to prioritize onshoring efforts and reduce its dependence on foreign critical minerals, USAC’s move sets an important precedent for the future of the domestic antimony market. With global supply chain disruptions highlighting the need for self-sufficiency, USAC is positioning itself as a key player in the race to secure critical mineral resources.

USAC Antimony Expansion Targets July Start for US Defense Stockpile Supply

USAC Antimony

USAC antimony expansion at Thompson Falls in Montana is expected to be fully online by mid-July, strengthening US domestic supply of a critical defense metal. The company has started commissioning the smelter expansion and plans to bring operations online in phases.

USAC antimony expansion will add capacity at a time when Washington is trying to secure antimony ingots for the national defense stockpile. Antimony is used in ammunition, flame retardants, alloys and other defense-related applications.

USAC antimony expansion depends on the arrival of furnace parts expected in the last week of May. The company plans to start one to two furnaces each week until all nine furnaces are operating around mid-July.

By the end of July, US Antimony expects the expansion to produce at nearly 80% of its 230 t/month capacity. The company then plans to temporarily shut its older 75 t/month plant for four to eight weeks for maintenance and emissions upgrades.

Montana Capacity Supports Fixed-Price DLA Contract

The Thompson Falls expansion is directly tied to US Antimony’s five-year fixed-price contract with the Defense Logistics Agency. The contract covers 6.7mn lb, or 3,039t, of antimony ingots for the national defense stockpile and is worth up to $245mn.

USAC has received $12mn in DLA sales orders to date. It has also received the first two delivery notices for finished antimony ingots to the Department of Defense.

The federal contract will become a major revenue driver. USAC expects $75mn-95mn of its estimated $125mn revenue in 2026 to come from shipments to the US government.

That structure makes the Montana expansion strategically important. The project is not only a capacity increase; it is part of a government-backed supply chain for a material with limited domestic production.

USAC’s antimony inventories also increased sharply. Inventories reached $21.7mn at the end of the first quarter, up from $12mn at the end of 2025.

However, execution has not been smooth. The expansion was initially expected to be completed in January but was delayed by supplier and third-party issues involving concrete pads, building construction and heat exchangers.

Federal Funding Pushes US Antimony Beyond Thompson Falls

The Department of Defense awarded USAC $27mn in Defense Production Act Title III funds in February to expand antimony production and refining capacity in Montana and Alaska. The company received $12.8mn of that grant in April.

This funding shows that US antimony supply is now a defense industrial priority. China’s dominant role in antimony processing has made domestic and allied capacity more strategically valuable.

USAC is also pursuing a larger hydrometallurgical processing project in Idaho with Canadian miner Americas Gold and Silver. The joint venture was established in February.

The partners expect to complete construction of the Idaho facility in 2028. The project is targeting capacity of up to 1,000 t/month of 99.9% pure antimony.

USAC has applied for more than $274mn in federal grants across several projects. These include the hydromet facility and tungsten exploration at the Fostung site in Canada.

The company’s financial results still show the strain of expansion. USAC reported an $11.3mn first-quarter loss, compared with a $0.5mn profit a year earlier, while revenue fell by 3% to $6.8mn.

The near-term challenge is therefore operational execution. USAC must bring the Montana furnaces online, meet emissions requirements, deliver to the DLA and convert federal support into reliable production.

The Metalnomist Commentary

USAC’s Montana expansion shows how the US is trying to rebuild antimony capacity through defense contracts, stockpiles and public funding. The strategic risk is execution: domestic supply security depends on furnaces actually running, not only grants and offtake contracts.

US antimony supply chain strengthened by $43mn Nova funding

Alaska Range Resources

The US antimony supply chain is taking a strategic step forward with new defense-backed funding for production in Alaska. The US antimony supply chain has long depended on imports, but Nova Minerals’ subsidiary Alaska Range Resources (ARR) now plans domestic mining and refining at the Estelle project. The US Department of Defense has awarded $43.4mn to ARR, targeting military-grade antimony trisulfide and reinforcing the US antimony supply chain for critical applications.

DoD-backed investment targets military-grade antimony trisulfide

The new funding will help ARR develop antimony trisulfide production from stibnite ore at Estelle, creating an integrated mine-to-product operation. This integrated flow from ore to antimony trisulfide is designed to meet stringent military specifications for ammunition, pyrotechnics, and specialized defense systems. As a result, the project moves the US beyond basic concentrate supply and into value-added processing.

Antimony trisulfide is essential for ammunition, flame retardants and certain semiconductor applications, linking this project directly to both defence and advanced manufacturing demand. Meanwhile, the initiative aligns with broader US efforts to rebuild critical minerals capacity onshore, especially for materials that have faced supply disruptions and geopolitical risks. By backing a specific site with targeted capital, the DoD is signalling that antimony security is now a strategic priority alongside other defence-linked minerals.

From zero output to a domestic antimony production base

The US produced no antimony at commercial scale in 2024, underscoring how exposed domestic industries are to foreign supply. This new project therefore acts as a potential anchor asset for a future US production base. If Estelle reaches commercial scale, it could support downstream processors and catalyst, alloy and chemicals producers that currently depend on imported antimony feedstock.

At the same time, integrated mine and refining capacity in Alaska could stimulate associated infrastructure, from logistics to environmental technologies, creating a broader critical minerals hub. However, project execution, permitting, and ESG performance will determine whether the investment translates into reliable long-term volumes. Market participants will watch closely how quickly ARR can move from funding to sustained output, and how its costs compare with established suppliers.

The Metalnomist Commentary

This funding marks a meaningful, though early-stage, pivot from import dependence toward strategic domestic capacity in antimony. If Estelle delivers on its integrated vision, it could become a template for how defence funding accelerates critical mineral projects in North America. Yet the project must still prove it can compete on costs and sustainability in a market historically dominated by overseas producers.

Perpetua Resources Advances Plans for US Antimony Supply Chain Amid Rising Geopolitical Tensions

Perpetua Resources

Perpetua Resources is forging partnerships and conducting feasibility testing to establish a domestic antimony supply chain in the US, as China's export suspension amplifies the need for local sourcing.

Developing a US-Based Antimony Supply Chain

Idaho-based Perpetua Resources is taking significant steps to establish a domestic antimony supply chain by partnering with Sunshine Silver Mining and Refining and conducting metallurgical testing with US Antimony (USAC). The move comes at a critical time as the US grapples with the implications of China’s suspension of antimony exports, which began on December 3, 2024.

Antimony, a critical mineral essential for flame retardants, batteries, and defense applications, has seen rising demand amidst global supply chain vulnerabilities. Perpetua’s efforts are centered on its Stibnite Gold Project in Idaho, the only domestic reserve of antimony in the US, containing an estimated 148 million pounds (67,130 tonnes). During its first six years of operation, the project is expected to meet approximately 35% of US antimony demand.

Testing Partnerships for Processing Feasibility

To advance its vision, Perpetua has initiated:

• Feasibility testing with Sunshine Silver Mining and Refining at the Sunshine Mine Complex, also located in Idaho. Third-party engineers are developing a flowsheet to optimize the processing and refining of antimony from various ore types.

• Metallurgical testing with Montana-based USAC, where Perpetua is providing antimony concentrate samples from Stibnite to determine the specifications needed for commercially viable antimony products.

These partnerships are key to ensuring that the Stibnite Gold Project can support a fully domestic supply chain for antimony, reducing reliance on foreign imports.

Geopolitical Drivers and Market Implications

The urgency for a domestic supply chain has intensified following China’s decision to halt antimony exports to the US. Between January 2022 and October 2024, the US imported:

• 15,665 tonnes of antimony metal from China, representing 22% of total imports.

• 55,506 tonnes of antimony trioxide, accounting for 69% of total imports.

China's export suspension highlights the strategic importance of Perpetua’s efforts, as the US seeks to secure access to critical materials amid escalating geopolitical tensions.

Conclusion

Perpetua Resources’ initiatives, supported by partnerships with Sunshine Silver and USAC, position the company as a cornerstone of America’s critical mineral strategy. With the Stibnite Gold Project poised to reduce the nation’s dependency on foreign antimony, Perpetua is aligning itself with the growing demand for supply chain security in the face of global uncertainties.

US Antimony tungsten project in Canada advances with Fostung acquisition

Transition Metals

US Antimony tungsten project in Canada gains momentum with the Fostung purchase. The company expands into tungsten amid tightening supply. This US Antimony tungsten project in Canada targets quick, cost-effective development using existing mills.

Deal terms and resource details

US Antimony acquired the Fostung properties in Ontario for $5mn in cash. Sellers retain a combined 1pc net smelter return royalty, plus a prior 1pc NSR. The project hosts 12.4mn t at 0.213pc tungsten trioxide, inferred category. The company expects rapid, inexpensive development using Canadian infrastructure.

North American tungsten supply implications

No commercial tungsten production operates today in the US or Canada. However, the US Antimony tungsten project in Canada could narrow the regional gap. China produced 83pc of global tungsten in 2024 under export controls. As a result, diversified North American supply becomes strategically important.

The company sees demand from machining, mill products, and furnace components. Meanwhile, the Fostung resource offers grade and scale for early optionality. Therefore, US Antimony plans to process ore through established Canadian milling capacity. This approach lowers capex and accelerates time to market.

US Antimony tungsten project in Canada aligns with reshoring trends. Transition Metals and 1930153 ON keep royalties, aligning long-term interests. The company has not disclosed a start date, preserving flexibility as studies advance.

The Metalnomist Commentary

Fostung gives US Antimony leverage in a constrained tungsten market. If processing routes lock in, this project could become a key North American swing supplier as policy and pricing evolve.

Perpetua antimony mine development wins US approval and financing support

Perpetua antimony mining

Perpetua antimony mine development at the Stibnite Gold project has cleared a major US regulatory hurdle. The US Forest Service has granted conditional approval to begin mine construction after eight years of permitting review. As a result, Perpetua Resources can now advance early works, subject to securing full project financing.

US backs Perpetua antimony mine development with blended public and private finance

Perpetua antimony mine development is now underpinned by a substantial mix of equity, grants and planned debt. The company raised $425mn in June through a $325mn public share offering and a $100mn private placement. Meanwhile, Perpetua expects to secure up to $2bn in debt financing from the US Export-Import Bank, significantly derisking the project’s capital stack.

In parallel, the US Department of Defense has already provided more than $80mn, including $6.9mn from the US Army in May. This direct support confirms antimony’s status as a strategic material for defense and national security. Therefore the Stibnite Gold development sits squarely within Washington’s broader push to localise critical mineral supply chains.

Perpetua antimony mine development targets China-dependent supply gap

The Perpetua antimony mine development comes as the US confronts a complete lack of commercial-scale domestic antimony production. According to the US Geological Survey, the country currently produces no primary antimony at scale. However, demand remains robust for military uses, flame retardants and antimony–lead alloys in batteries and cables.

China’s December ban on antimony exports to the US has sharpened urgency around diversification. As a result, US policymakers view Stibnite Gold as a flagship project for rebuilding secure supply outside Chinese control. If executed on time and budget, the mine could reduce exposure to geopolitical shocks in a tight global antimony market.

The Metalnomist Commentary

Perpetua’s progress illustrates how quickly critical mineral projects can move once policy, capital and security interests align. The decisive test will be execution: any delays or cost overruns could reopen the US antimony gap and reinforce China’s leverage in this niche but vital market.

US Antimony Q2 Revenue Nearly Triples as Smelter Ramp Advances

US Antimony

US Antimony Q2 revenue nearly tripled to $10.5mn, but profit slipped 11%. The company cited higher sales and ramp costs. US Antimony Q2 revenue included $9.66mn from antimony product sales. Management accelerated feedstock diversification and smelter utilization. US Antimony Q2 revenue growth contrasts with margin compression from operating frictions.

Smelter ramp and sourcing reshape operational risk

The firm pushes both smelters toward capacity this year. Thompson Falls expansion should finish before year-end. Madero in Mexico restarted during the quarter. New domestic claims support longer-term ore security. However, permit delays persist in Alaska. The company sources smaller lots from multiple countries. New feedstock will ship from Bolivia, Chad, and Peru. That strategy spreads supply risk but raises logistics complexity.

Regulatory and quality challenges pressured near-term margins. Chinese customs blocked a 50t stibnite cargo for 82 days. Authorities returned the shipment to Australia. Material from Mandalay carried high arsenic and iron impurities. The company may not process that source going forward. These events raised costs and strained cash flow. Management still explores a third smelter but has no firm plan.

The Metalnomist Commentary

US Antimony pairs growth with tougher execution realities. Ramping smelters without stable, clean feedstock caps profitability. Watch Thompson Falls completion, Madero throughput, and impurity management for margin recovery.

Larvotto rejects USAC acquisition offer in strategic antimony move

Larvotto Resources

Larvotto rejects USAC acquisition offer as its board unanimously concludes the proposal undervalues the company’s future potential. The indicative bid from US Antimony (USAC), lodged on 17 October, offered six USAC shares for every 100 Larvotto shares. However, Larvotto rejects USAC acquisition offer terms that do not reflect the embedded value of its Hillgrove antimony-gold project in New South Wales. The Australian producer also signals confidence in its standalone growth pathway as Hillgrove advances toward first production in 2026. As a result, existing shareholders are being encouraged to back management’s independent strategy rather than tender into USAC’s stock-based bid.

Hillgrove antimony-gold project underpins Larvotto valuation

Larvotto rejects USAC acquisition offer primarily because Hillgrove anchors a strong medium-term antimony growth story. The project is expected to start production in the second quarter of 2026, reinforcing Larvotto’s transformation from developer to producer. Hillgrove could deliver about 5,700 t/yr of antimony during its first five years, positioning Larvotto as a significant non-Chinese supplier. Therefore Larvotto rejects USAC acquisition offer terms that, in its view, fail to price in this production profile and commodity exposure. The company sees rising strategic value in antimony, which is used in flame retardants, alloys and defense-related applications. In that context, management appears unwilling to surrender full control ahead of key de-risking milestones.

US Antimony’s strategic ambitions face a setback

Larvotto rejects USAC acquisition offer at a time when US Antimony is trying to secure more upstream supply. USAC already owns around 10pc of Larvotto, or about 51.7mn shares, giving it a meaningful toehold. However, the rejection leaves USAC without a clear path to full ownership of Hillgrove’s future antimony output. The company did not respond to requests for comment, leaving its next steps unclear. It could revisit the proposal with improved terms, maintain its minority stake, or eventually exit if strategic alignment fades. Meanwhile, the failed approach highlights intense competition for antimony assets as Western buyers seek to diversify supply away from traditional producers.

The Metalnomist Commentary

Larvotto’s decision to reject USAC’s stock-based proposal underscores how developers now price in a strategic premium on critical mineral assets. In the antimony space, projects like Hillgrove can rapidly gain importance for supply diversification, making lowball bids increasingly hard to justify. For US Antimony, securing material through offtake stakes or joint ventures may prove more achievable than outright control in a market where geology and geopolitics are converging.

Perpetua Antimony Loan Moves Stibnite Toward US Critical Minerals Production

Perpetua Resources

Perpetua antimony loan approval from the US Export-Import Bank gives Perpetua Resources a major financing route for its Stibnite Gold antimony-gold project in Idaho. The $2.9bn loan is intended to support full construction of one of the most strategically important US antimony projects.

Perpetua antimony loan support reflects Washington’s growing willingness to finance domestic critical minerals projects tied to defence, industrial security and supply-chain resilience. Antimony is used in military applications, flame retardants and lead alloys for batteries and cables.

Perpetua antimony loan funding is expected to become available in the second half of 2026, after standard requirements and documentation are completed. The company plans to cover full construction costs using the loan and its own funds.

The 13-year loan includes $2.4bn in upfront EXIM funding and a further $500mn to cover interest and fees during construction. Repayments are expected to begin in 2030.

EXIM Financing Strengthens Stibnite’s Construction Path

The EXIM approval is a major step for Perpetua because critical minerals projects often struggle to move from permitting to construction without large-scale financing. The Stibnite project now has a clearer path toward development.

The loan decision follows EXIM’s move to notify Congress of the proposed financing on 31 March. Perpetua had received a preliminary non-binding term sheet from EXIM in September 2025.

This timeline shows how strategic minerals financing is becoming more formalised. US agencies are not only identifying supply-chain gaps; they are using public financing tools to help build domestic capacity.

For Perpetua, the loan reduces one of the largest development risks. Construction funding can now be aligned with permitting, engineering, procurement and site preparation.

The project had already received its final federal permit in May 2025. That approval followed its selection for a federal expedited permitting initiative one month earlier.

Together, the permit and loan approval move Stibnite closer to becoming an operating domestic source of antimony, rather than only a strategic mineral proposal.

Antimony Reserves Carry Defense and Industrial Value

Perpetua estimates that the Stibnite Gold project contains 148.7mn lb of contained antimony reserves. That resource base gives the project clear strategic value for the US.

Antimony is a small-volume metal, but its applications are highly sensitive. Defence, batteries, cables and flame retardants all depend on reliable material availability.

The Stibnite project also includes gold, which can support project economics alongside antimony. This is important because many critical minerals projects need by-product value or multi-metal revenue to improve bankability.

The loan highlights a wider change in US minerals policy. Washington is increasingly treating domestic production, processing and financing as part of national security strategy.

For downstream buyers, the key question will be timing. The loan may be available in late 2026, but construction, commissioning and qualification will determine when material can actually enter the supply chain.

If developed successfully, Stibnite could reduce US exposure to external antimony supply risks and strengthen domestic access to a material used across defence and industrial applications.

The Metalnomist Commentary

Perpetua’s EXIM loan shows that the US is now willing to put serious capital behind critical minerals security. Antimony may be a niche market, but Stibnite proves that small-volume metals can carry large strategic value.

Idaho Antimony Project Receives Final Federal Permit for 148 Million Pound Reserve

Idaho Antimony Project

Idaho antimony project development reached a critical milestone as Perpetua Resources secured final federal permits for the Stibnite Gold project. The Idaho antimony project contains estimated reserves of 148 million pounds of antimony, addressing critical supply chain vulnerabilities as the US produced no marketable antimony in 2024 according to the US Geological Survey, making the Idaho antimony project essential for domestic critical minerals security.

Critical Minerals Initiative Accelerates Strategic Project Development

Idaho antimony project advancement benefits from federal critical minerals initiatives designed to strengthen domestic supply chains. The Stibnite project was selected in the first wave of a federal initiative launched in April to expedite permitting for critical mineral projects. This selection demonstrates government recognition of antimony's strategic importance for flame retardants, military applications, and lead-antimony alloys used in batteries and cables.

Meanwhile, the project began its permitting journey in 2016, reflecting the complex regulatory environment surrounding large-scale mining operations. The eight-year federal permitting timeline highlights challenges facing domestic critical minerals development despite government support for supply chain resilience. Idaho Governor Brad Little signed an executive order in January aimed at simplifying state-level mining permit processes.

State Permits and Financing Requirements Remain Outstanding

However, construction cannot commence until state permitting completion and additional financing arrangements. Idaho's regulatory approval remains pending despite the federal permit milestone, creating continued uncertainty for project timelines. The dual permitting structure demonstrates coordination challenges between federal and state authorities for critical minerals projects.

Therefore, Perpetua requires substantial additional financing beyond current funding commitments to begin construction activities. The company secured approximately $75 million from the US Department of Defense, $12.5 million in equity financing, and $8.5 million from silver production royalties. The US Export-Import Bank indicated potential provision of up to $1.8 billion in debt financing, representing the largest component of the financing package.

Domestic Supply Chain Partnerships Support Project Viability

Furthermore, Perpetua established strategic partnerships to develop comprehensive antimony processing capabilities within the United States. The company signed initial agreements with Sunshine Silver Mining and Refining and US Antimony in December to explore processing and testing opportunities. These partnerships address downstream processing requirements essential for complete supply chain integration.

As a result, the domestic partnership approach creates vertically integrated antimony production capabilities from mining through refining. This comprehensive strategy aligns with government objectives to reduce dependence on foreign antimony sources while supporting defense and industrial applications requiring reliable domestic supply. The partnerships also provide technical expertise and market access for Perpetua's antimony concentrate production.

The Metalnomist Commentary

The Idaho antimony project's federal permit approval represents a crucial step toward establishing domestic antimony production capability, addressing a critical gap in US strategic minerals supply where the nation currently produces zero marketable antimony despite significant defense and industrial demand. While state permits and financing challenges remain, the project's advancement through federal critical minerals initiatives demonstrates how government support can accelerate strategic resource development for national security priorities.

US Antimony feedstock sourcing expands to secure smelter supply

US Antimony feedstock

US Antimony feedstock sourcing broadened across the US and overseas to stabilize operations. The company moved to secure inputs for its Montana and Mexico smelters. As a result, it advanced domestic mining claims and lined up new international suppliers. However, it also flagged issues with Australian material quality and logistics.

Domestic expansion: Alaska and Montana

US Antimony feedstock sourcing grew with new Alaska claims, including a 150-acre site near Fairbanks. The firm expects faster permitting since the land is neither federal nor state. Meanwhile, reacquired claims beside its Montana smelter should deliver stibnite within months. Therefore, domestic ore should lower supply risk and trucking distances.

International diversification: Bolivia and Chad

Bolivia will supply up to 150 t/month of antimony flake starting in early 2026. A 10 t pilot shipment arrives at the Montana smelter in August. Additionally, two sources in Chad will feed the Madero smelter, starting with 80 t. Subsequent deliveries should reach 100 t/month to support steady throughput. Canada also lifted feedstock to 857 t year-to-date, up 121 percent.

Australian sourcing faces setbacks following a 50 t shipment held 82 days by Chinese customs. Concurrently, incoming ore showed elevated arsenic and iron, pressuring processing costs. However, broader sourcing and scrap blending can offset penalties and maintain recoveries. Therefore, the portfolio approach underpins more reliable antimony supply for strategic markets.

The Metalnomist Commentary

Diversification is the right hedge as geopolitics and impurities raise feedstock risk. Watch ramp discipline in Bolivia and Chad and impurity management in Montana. If logistics hold, US Antimony can claw back margin despite uneven market conditions.

Korea Zinc Ships First Antimony Supply to US

Korea Zinc

Korea Zinc Expands Antimony Exports to Strengthen US Supply

Korea Zinc has shipped antimony supply directly to the United States for the first time, marking a major milestone in diversifying global supply chains. The South Korean metals processor expects to deliver up to 100 tonnes of antimony to the US this year, rising to 240 tonnes in 2026. The first 20-tonne shipment departed Busan and is scheduled to arrive at the Port of Baltimore, Maryland, next month.

The exported antimony will be supplied to around 10 defense companies, with applications ranging from munitions alloys to semiconductor production, aerospace equipment, and electronic soldering materials. Korea Zinc produced 3,500 tonnes of antimony in 2024 and plans to sign long-term contracts in the next fiscal year to secure steady offtake agreements.

Strategic Context: US Supply and China’s Export Restrictions

The US faces growing antimony supply challenges, making Korea Zinc’s exports strategically significant. The United States produced no marketable antimony in 2024, according to the US Geological Survey, leaving the country highly dependent on imports. China, which dominates global production, suspended exports of antimony to the US in December, further tightening availability.

As a result, Korea Zinc’s shipments provide a timely alternative for US industries. Defense companies are particularly reliant on antimony for its critical role in flame retardants, lead alloys for batteries, and advanced aerospace alloys. By securing South Korean supply, the US is working to mitigate risks linked to geopolitical tensions and trade restrictions with China.

The Metalnomist Commentary

Korea Zinc’s first direct antimony shipment to the US highlights shifting trade dynamics in critical minerals. With China restricting exports, South Korea is emerging as a reliable partner for US defense and technology supply chains. If long-term contracts materialize, Korea Zinc could position itself as a key supplier in the US market, reinforcing supply security in one of the most geopolitically sensitive critical minerals.