Sterling Expands High-Grade Copper Mineralization East at MEPS Intersecting 203 Metres at 0.51% CuEq: Includes 16.25 Metres at 2.31% CuEq and 9.50 Metres at 2.34% CuEq within 445 Metres at 0.40% CuEq

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TORONTO, ON / ACCESS Newswire / August 10, 2026 / Sterling Metals Corp. (TSXV:SAG)(OTCQB:SAGGF) ("Sterling" or the "Company") is pleased to report assay results from drill hole SC-26-13 at the MEPS Zone ("MEPS"), part of the Company's ongoing 20,000m drill program at the Soo Copper Project ("Soo Copper" or the "Project"), near Batchewana Bay, Ontario. Drilled approximately 140 metres east of SC-26-10 (reported in a press release on July 29, 2026) the hole intersected 445.0m grading 0.40% copper equivalent ("CuEq") (0.24% Cu, 172 ppm Mo, 0.05 g/t Au, 2.09 g/t Ag), including 203.10m grading 0.51% CuEq (0.38% Cu, 43.4 ppm Mo, 0.09 g/t Au, 2.99 g/t Ag) and higher-grade intervals of 16.25m grading 2.31% CuEq (1.90% Cu, 127.6 ppm Mo, 0.226 g/t Au, 12.09 g/t Ag) and 9.50m grading 2.34% CuEq (1.29% Cu, 63.6 ppm Mo, 0.88 g/t Au, 20.72 g/t Ag). Highlights: Jeremy Niemi, P.Geo., Senior Vice President, Exploration and Evaluation, commented, "SC-26-13 is an outstanding result that combines nearly 450 metres of continuous mineralization with significant higher-grade copper intervals associated with GFP porphyry sills. The hole extends to the east, high grade copper mineralization intersected in hole SC-26-10 and strengthens our interpretation that this higher-grade mineralization is horizontally continuous and predictable. We are particularly encouraged by the intensity and diversity of the mineralization in SC-26-13. High-grade chalcopyrite-bornite quartz ribbon veins, copper-magnetite veins and a newly recognized chalcopyrite rich quartz breccia. This all points to a large and robust copper rich hydrothermal system at MEPS, the extent of which we are only beginning to realize as we continue to drill." Technical Discussion The MEPS porphyry copper system is characterized by broad, near-surface copper mineralization hosted predominantly in altered Neoarchean mafic volcanic rocks intruded by multiple phases of Mesoproterozoic felsic porphyry. Previous drilling has demonstrated that the strongest copper grades commonly occur adjacent to early "GFP" felsic dykes and sills and associated magnetite-rich veining, which appear to have focused copper-rich hydrothermal fluids into favourable, permeable host rocks. Within the shallow part of the broadly copper-mineralized MEPS system are two shallow dipping, laterally extensive felsic GFP sills, representing the earliest of the ...

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