American Tungsten & Antimony Ltd Acquires Nevada Del Sol Refinery to Boost U.S. Critical Metals Supply

Del Sol Refinery Acquisition: Transformative Step for AT4

American Tungsten & Antimony Ltd has finalized a Share Sale and Purchase Agreement to acquire 100% ownership of the Del Sol Refinery in Nevada, along with the White Spar Antimony Mine in Arizona. This acquisition is a significant milestone, as the Del Sol Refinery is fully constructed and permitted to produce electrolytic antimony flake. The operational refinery provides AT4 with immediate access to the U.S. critical metals market, a sector vital to national security.

The Del Sol facility currently holds permits to process up to 18,500 tons of feed annually, with strategic plans to expand this capacity substantially. The company intends to diversify production into higher-value antimony products such as ammonium paratungstate (APT), crucial for industrial uses in defense and semiconductor industries. This acquisition supports AT4’s objective of creating a vertically integrated critical minerals supply chain within the United States.

Strategic Role of Antimony and Tungsten in U.S. Defense

Antimony and tungsten are essential materials extensively utilized in the U.S. defense sector. Antimony trisulfide is a key ingredient in ammunition, while tungsten is critical for armor-piercing munitions and aerospace components. Despite their strategic importance, domestic production in the U.S. is limited, with heavy reliance on imports, predominantly from China. This dependence presents significant national security risks amid escalating geopolitical tensions.

By acquiring the Del Sol Refinery, AT4 aims to reduce these vulnerabilities by establishing a domestic supply chain for these vital metals. Producing antimony products entirely on U.S. soil enhances supply reliability for defense contractors and other industries reliant on these materials. As the U.S. government intensifies efforts to lessen dependence on foreign sources, AT4’s operations could become increasingly critical.

Expansion Strategy: Scaling Capacity and Product Offerings

Post-acquisition, AT4 plans to initiate efforts to increase antimony flake production capacity promptly. The company is also exploring facility expansion to include ammonium paratungstate (APT) production, a key intermediate for tungsten metal powders and tungsten carbide used in military-grade materials.

To facilitate this, AT4 has solicited proposals from top international engineering firms to assess costs for establishing a U.S.-based tungsten APT refinery. Leveraging Del Sol’s existing hydrometallurgical infrastructure, the company aims to enhance production capabilities and meet rising demand for critical minerals in the U.S. market.

Financial Strength: Robust Cash Position to Support Growth

AT4 is financially well-equipped to back its growth plans, reporting a pro forma cash balance of $26.5 million. This includes proceeds from exercised options and a capital raise completed in May 2026. The strong cash position enables the company to pursue non-dilutive U.S. debt and government funding to finance expansion, aligning with the growing emphasis on domestic critical mineral production.

Financial resources will be pivotal in advancing operational enhancements at the Del Sol Refinery. With U.S. government initiatives promoting domestic supply chains for critical materials, AT4’s fiscal health positions it to capitalize on funding opportunities and grants supporting local production.

Regulatory Progress: Upcoming Key Meeting

As part of the acquisition process, CEO Casper Adson is scheduled to meet with the Nevada Division of Environmental Protection (NDEP) on July 29, 2026. This meeting is crucial for advancing approvals related to increasing the refinery’s permitted feed capacity to approximately 100,000 tons per year. Obtaining these approvals is essential for AT4 to realize its expansion goals and satisfy growing market demand.

The discussion will also cover the proposed permit expansion for tungsten refining, a core element of AT4’s strategic vision. While regulatory approvals can be complex and lengthy, a positive outcome could accelerate the company’s growth and strengthen its competitive position in the U.S. critical metals market.

Market Context: Tackling Supply Chain Risks

Current market conditions for critical minerals like antimony and tungsten are heavily shaped by geopolitical challenges. The U.S. has emphasized securing domestic sources amid China’s export controls and rising global tensions. Government policies increasingly focus on reducing foreign dependency by boosting domestic production capabilities.

AT4’s acquisition of the Del Sol Refinery is a timely strategic response to these dynamics. By establishing a domestic supply chain, the company aims to become a key player in the U.S. critical minerals sector. The defense-related importance of antimony and tungsten further highlights AT4’s potential to meet growing demand as the U.S. government strengthens its domestic production efforts.

Outlook: Nasdaq Listing Planned for Q4 2026

Looking forward, AT4 targets a Nasdaq listing in the fourth quarter of 2026. This move reflects the company’s ambition to increase visibility and access capital markets to support its growth initiatives. A successful listing could provide additional resources to accelerate expansion and reinforce AT4’s position in the critical metals industry.

The Nasdaq listing aligns with AT4’s strategic objective to become a leading U.S. supplier of antimony and tungsten products. Enhancing its profile among investors and stakeholders will help attract further investment and partnerships to drive growth and operational improvements in the coming years.