Announcement • Sep 17

Metalsource Mining Reports Additional Assay Results from Ongoing Drill Program At Silver Hill

Metalsource Mining announced additional assay results from its ongoing drill program at Silver Hill, where deep drilling continues to improve management's understanding of the high grade polymetallic system. Hole SH26-22 returned 7.32 metres grading 261 g/t silver equivalent ("AgEq"), including 1.37 metres grading 930 g/t AgEq from 245.67m. Hole SH26-23 returned 12.31 metres grading 140 g/t AgEq, including 1.86 metres grading 833 g/t AgEq from 246.8m. These two holes continue to demonstrate mineralization at depth, with reliable widths and high grades. SH26-06 returned minimal base metals, but identified multiple mineralized intervals containing gold (Au), including 0.4m of 3.1 g/t Au from 119.30m. Both holes intersected higher grade mineralization within broader mineralized horizons at depth, providing additional geological information as Metalsource continues step out drilling and prepares to significantly expand exploration along strike. Ongoing drilling is currently stepping out from the known Silver Hill mineralization to test its continuation into previously untested ground. Building on this work, Metalsource is preparing a subsequent phase of significantly larger step outs to the north and south designed to test the broader strike potential of the mineralization. In parallel, expanded drilling capacity will allow the Company to begin testing priority IP anomalies beyond the historic mine footprint, several of which exhibit geophysical characteristics similar to those associated with Silver Hill proper. Drill Hole ID From (m) To (m) Length (m) Au (g/t) Ag (g/t) Pb (%) Zn (%) Cu (%) AgEq (g/t) SH26-22 245.67 252.98 7.32 1.4 33.7 3.7 5.4 0.1 261 Including 251.61 252.98 1.37 3.0 157.6 17.1 23.6 0.4 930 SH26-23 246.80 259.11 12.31 0.9 12.0 1.0 3.3 0.0 140 Including 257.25 259.11 1.86 5.7 70.3 5.7 18.2 0.1 833 SH26-06 119.30 119.69 0.40 3.1 2.6 0.0 0.0 0.0 236. Table 1: Composite assay results with widths reported as core length. Additional data is needed to estimate the true width of intercepts at this stage of the project. Details on AgEq calculations below. Drillhole SH26-25 was drilled toward the WSW, and was designed to test the developing structural model of the project while investigating alteration assemblages on trend to the south of Silver Hill, and west of SH26-27. Although no mineralization was anticipated, SH26-25 provided valuable information about alteration intensity in hanging wall stratigraphy above the interpreted deep extension of Silver Hill mineralization. Strong quartz-sericite-pyrite + albite alteration was observed in the hanging wall rocks, stratigraphically above the down plunge projection of SH26-27. These results provide justification for deep exploration below SH26-27 and represent a potential for significant growth opportunity at Silver Hill. Ongoing Step Out Drilling: Metalsource is actively stepping out from the known Silver Hill mineralization, testing its continuation along strike and into previously untested ground. Preparing for Larger Strike Expansion: Building on the current step out program, Metalsource is planning significantly larger step outs to the north and south designed to test the broader strike potential beyond the currently drilled footprint. Testing New IP Targets: The second drill provides the capacity to begin testing completely untested priority IP anomalies beyond the historic mine footprint, several of which exhibit geophysical characteristics similar to those associated with Silver Hill proper. Continued Silver Hill Expansion: Drilling will continue along strike and at depth while new assays, alteration data, structural interpretation and geophysics are incorporated into the evolving geological model to guide subsequent drilling. Multiple Assays Pending: Results remain outstanding from several completed holes, providing a continued pipeline of technical information as the expanded exploration program advances. SH26-22 and SH26-23 provide additional evidence supporting the continuity of the Silver Hill mineralization at depth, with both holes returning higher grade intervals within broader mineralized horizons. Together with the alteration observed farther south, the results continue to strengthen the Company’s geological understanding as drilling expands beyond the historically mined area. The opportunity now extends well beyond the currently drilled footprint. Metalsource is actively stepping out from the known system and preparing significantly larger step outs to the north and south to test the broader strike potential across largely untested ground. At the same time, the second drill provides the capacity to begin testing priority IP anomalies beyond Silver Hill proper, several of which exhibit geophysical characteristics similar to the known mineralization but remain completely untested by drilling. The exploration results described herein are preliminary in nature and are insufficient to define a mineral resource. Further drilling is required to determine the continuity, geometry, and grade distribution of mineralization. At the time of this release analytical results remain pending. Metal values used in AgEq calculations are from the 200-day moving average values from 2/6/2026, and all values are in USD. PAu= $124.5/g, PAg= $1.58/g, PCu= $4.9/lb, PPb=$0.90/lbs, PZn=$1.11/lb, 0.00220462262 = grams-to-pounds conversion factor, 22.0462262 = pounds per tonne for 1% metal. Metal recoveries used in the AgEq calculation are Au: 95.5%, Ag: 92.9%, Pb: 89.2%, Zn: 93.8% and Cu 90.8%. These recovery values are derived from batch metallurgical testing used to estimate recoveries of Silver Hill ores, completed in 1988. Individual metal values in the results table are composited values and not factored by recovery. Metal recoveries are applied to their respective component of the AgEq calculation only.

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