American Tungsten Intersects Hubnerite-Scheelite Mineralization in Initial Drillhole at IMA Mine ProjectVancouver, British Columbia--(Newsfile Corp. - December 18, 2025) - American Tungsten Corp. (CSE: TUNG) (OTCQB: TUNGF) (FSE: RK90) ("American Tungsten" or the "Company) announced that it has completed the initial drillhole at the Company's IMA mine project and reports presence of hubnerite and scheelite tungsten mineralization over multiple core intercepts.The Phase 1 drilling program, as described in the Company's press release on December 02, 2025, is focused on five priority exploration targets consisting of the No. 5 and No. 7 Vein systems, the IMA West Vein, the Eastern Vein, and the Main IMA Vein. The program was designed to systematically test multiple sheeted tungsten veins up-dip and along strike of historical resources defined on the "D-Level" of the IMA mine. The objective of the Company's Phase 1 program is to further delineate these historically identified tungsten vein systems and address compelling low-risk targeted areas for expansion of known mineralization by the end of Q1 2026"The initial drillholes at the IMA project are highly promising for American Tungsten. While assay results are still pending, this early success is a testament to the expertise and dedication of our technical team. Their work is laying the groundwork to validate historical reserves and unlock new opportunities for growth. We are confident this momentum will continue to expand the project's potential and deliver lasting value for our shareholders," said Ali Haji, CEO of American Tungsten Corp.Drill Program HighlightsThe first drillholes were collared from a new crosscut in the footwall of the D Level vein system. AT25-01was oriented on a 280 azimuth with a +40 inclination; AT25-02 was oriented on a 225 azimuth with a +45 inclination. AT25-01 was completed at 373 feet on December 12, 2025;Drillhole AT25-02 is ongoing as part of the Company's planned 10,000 ft, phase 1 program. The drilling contractor is initiating double-shifts to increase productivity;AT25-01 intersected the No. 5 vein over 12.7 ft from 95 to 107.7 ft, and the No. 7 vein over 14.1 ft from 240.2 to 254.3 ft. AT25-02 is currently drilled to a depth of approximately 150 ft and intersected the No.5 vein over 11.5 ft from 93 to 104.5 ft.; Hubnerite (MnWO4) was observed as 0.5-10mm reddish-brown to black striated prismatic crystals occurring within discrete vein horizons distributed throughout significant widths of the No. 5 quartz vein. Scheelite (CaWO4) was observed under shortwave UV light as blue fluorescent diffuse masses, sometimes rimming hubnerite crystals within coarse milky quartz over four feet of the vein.;In the No. 7 vein, hubnerite was observed as 0.5 to 5mm crystals occurring in discrete vein horizons within sheeted or milky quartz vein phases, locally partially oxidized. Accessory minerals observed in both the No. 5 and No. 7 veins include tetrahedrite, chalcopyrite, galena, molybdenum, pyrite and fluorite; Wall rock in AT25-01 was generally unmineralized to weakly mineralized, except where additional pyrite-calcopyrite +/- molybdenum veins were intersected outboard of the primary veins. True width of the veins is estimated to be approximately 80% of intercept width, based on projected geometry and vein contact-core axis angles. Core recovery is greater than 90% within vein material. Assay results have not been received for AT25-01 or AT25-02.AT25-01 88 ft to 115 ft showing No.5 quartz-hubnerite-tetrahedrite-pyrite-calcopyrite vein intercept.To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/11701/278474_d4356630f4af0a43_002full.jpgAT25-01 96.8 ft. Hubnerite masses in coarse milky quartz. Core diameter is 2 inches.To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/11701/278474_d4356630f4af0a43_003full.jpgAT25-01 105 ft. Hubnerite laths and partially oxidized masses in coarse milky quartz. Core diameter is 2 inches.To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/11701/278474_d4356630f4af0a43_004full.jpgAT25-01 99.5 and 103.5 ft. Scheelite (blue fluorescence) visible under shortwave UV in coarse milky quartz. Core diameter is 2 inches.To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/11701/278474_d4356630f4af0a43_005full.jpgAT25-01 265 ft. Hubnerite in quartz vein adjacent to sericite altered quartzite. Core diameter is 2 inches.To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/11701/278474_d4356630f4af0a43_006full.jpgAT25-01 240.2 - 247.3 ft - banded quartz of No. 7 vein with pyrite, tetrahedrite, local hubnerite. Core diameter is 2 inches.To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/11701/278474_d4356630f4af0a43_007full.jpgThe next drillholes from the first drill