American Tungsten Files the IMA Technical Report

American Tungsten Corp. has filed a National Instrument 43-101 Technical Report for its IMA Project in Idaho. The filing contains an updated Mineral Reserve and Mineral Resource estimate effective June 6, 2025, which was revised on May 27, 2026.

The Mineral Resource Estimate for the IMA Mine includes 316,000 tonnes of Indicated Resources grading 0.55% WO₃ (1,747 tonnes WO₃) and 2,178,000 tonnes of Inferred Resources grading 0.55% WO₃ (11,933 tonnes WO₃). Additionally, the Surface Tailings Resource comprises 267,000 tonnes of Indicated Mineral Resources grading 0.15% WO₃ (413 tonnes WO₃).

The company outlines a phased development strategy. Phase I focuses on evaluating and processing existing surface tailings for a lower-capital, near-term production pathway. Phase II targets the rehabilitation and restart of the historic underground mine.

The report was prepared by B. LeBlanc, P.Eng. of A-Z Mining Professionals. Current activities include an ongoing exploration drill program, engineering studies, and an assessment of the underground mining restart.

American Tungsten Corp (TUNG) filed a NI 43-101 Technical Report, a standard milestone for a pre-revenue exploration company advancing toward a Preliminary Economic Assessment or feasibility study. The resource numbers are consistent with previous announcements made on August 20, 2026, and reflect more than 30,000 feet of drilling completed since December 2025.

The company’s phased development strategy, which prioritizes tailings before underground operations, aligns with prior management commentary and reduces near-term capital expenditure risk. This news is incremental and confirms the technical foundation for future economic studies, without introducing unexpected catalysts or altering the company's strategic trajectory.

American Tungsten Corp. (TUNG) is a pre-revenue exploration and development company focused on the IMA Mine in Lemhi County, Idaho. The IMA Mine is a historic underground tungsten producer that generated approximately 199,449 MTUs of WO₃ between 1945 and 1957. The company holds an exclusive option to acquire full ownership of the property, subject to a 2% royalty, and has expanded its land position with 113 additional federal claims totaling approximately 2,000 acres.

The strategic focus is on revitalizing domestic U.S. tungsten production to address supply chain vulnerabilities, particularly given China's dominance in global tungsten supply and recent export controls. The project benefits from existing infrastructure, including a past-producing mill site, underground access, and patented land.