Osisko Intersects 748 Metres Averaging 0.27% Cu at GaspéSouthern Extension hole cuts 163.5 metres averaging 0.47% Cu MONTREAL, Jan. 15, 2026 (GLOBE NEWSWIRE) -- Osisko Metals Incorporated (the "Company" or "Osisko Metals") (TSX: OM; OTCQX: OMZNF; FRANKFURT: 0B51) is pleased to announce new drill results from the Gaspé Copper Project, located in the Gaspé Peninsula of Eastern Québec. New analytical results are presented below (see Table 1), including 35 mineralized intercepts from ten new drill holes. Infill intercepts are located inside the 2024 MRE model (see November 14, 2024 news release), and are focused on upgrading inferred mineral resources to measured or indicated categories, as applicable. Expansion intercepts are located outside the 2024 MRE model and may potentially lead to additional resources that will be classified appropriately within the next MRE update. Some of the reported intercepts have contiguous shallower infill as well as deeper expansion (noted on Table 1 below as “Both”). Maps showing hole locations are available at www.osiskometals.com. Highlights: Drill hole 30-1144 748.0 metres averaging 0.27% Cu (0.37% CuEq – infill and expansion) Drill hole 30-1146 729.0 metres averaging 0.21% Cu (0.29% CuEq – infill and expansion) Drill hole 30-1142 585.0 metres averaging 0.24% Cu (0.31% CuEq – infill and expansion)245.0 metres averaging 0.55% Cu (0.70% CuEq – expansion) Drill hole 30-1143 (Southern Extension) 163.5 metres averaging 0.47% Cu (0.50% CuEq – expansion) Drill hole 30-1141 171.5 metres averaging 0.42% Cu (0.46% CuEq – infill) Drill hole 30-0881 (historical re-assay) 62.5 metres averaging 0.29% Cu (0.38% CuEq – expansion)421.8 metres averaging 0.28% Cu (0.39% CuEq – expansion) Drill hole 30-1135 201.0 metres averaging 0.20% Cu (0.31% CuEq – expansion) Table 1: Infill and Expansion Drilling Results DDH No.From (m)To (m)Length (m)Cu %Ag g/tMo %CuEq* %Type**30-88113.776.262.50.292.200.0200.38ExpansionAnd546.7592.145.40.201.670.21ExpansionAnd622.71044.5421.80.281.240.0260.39Expansion30-1132304.8320.115.30.662.520.0160.73ExpansionAnd640.5694.554.00.281.870.0050.31ExpansionAnd735.0783.448.40.321.910.0110.37Expansion30-11357.033.026.00.311.540.32InfillAnd148.5201.052.50.191.560.20InfillAnd231.0296.565.50.282.430.0050.31InfillAnd329.9495165.10.282.170.0510.48InfillAnd528.0729.0201.00.201.590.0260.31Expansion30-1137113.0166.553.50.191.820.21InfillAnd311.4345.834.40.272.510.0070.31ExpansionAnd424.9449.524.60.161.340.0210.24InfillAnd496.5585.488.90.332.270.0150.40ExpansionAnd726.2851.4125.20.201.250.0090.23Expansion30-114194.0265.5171.50.423.120.0070.46InfillAnd507.0535.528.50.182.090.19Infill30-114275.0660.0585.00.240.960.0170.31Both(including)75.0576.5501.50.260.990.0170.32Infill(including)576.5660.083.50.120.830.0180.19ExpansionAnd761.51006.5245.00.552.250.0350.70Expansion30-114321.0184.5163.50.473.410.50ExpansionAnd265.5313.548.00.676.150.71ExpansionAnd490.5517.527.00.373.630.39Expansion30-114422.062.040.00.231.700.24InfillAnd227.0975.0748.00.271.840.0230.37Both(including)227.0789.4562.40.271.740.0180.34Infill(including)789.4975.0185.60.292.150.0390.44Expansion30-114516.052.136.10.141.750.15InfillAnd151.5208.657.10.232.400.25InfillAnd257.3285.027.70.131.500.15InfillAnd334.5374.039.50.241.950.0070.28InfillAnd415.3462.547.20.181.470.0090.23InfillAnd477.7627.0149.30.151.110.0160.22ExpansionAnd717.7770.052.30.181.240.0240.28Expansion30-114612.0204.0192.00.312.360.32InfillAnd264.0399.0135.00.131.020.0140.19InfillAnd423.01152.0729.00.211.480.0190.29Both(including)423.0713.5290.50.211.370.0180.28Infill(including)713.51152.0438.50.211.550.0200.29Expansion * See explanatory notes below on copper equivalent values and Quality Assurance/Quality Controls.** “Both” indicates drill holes that have contiguous shallower infill as well as deeper expansion intercepts. Discussion Drill hole 30-0881, located on the western margin of the Copper Mountain pit, was a historical hole that was re-analyzed from available core to include sections that had not been previously assayed. New results added three new significant mineralized intervals (expansion) including 62.5 metres averaging 0.29% Cu, 2.20 g/t Ag and 0.020% Mo, followed by 45.4 metres averaging 0.20% Cu and 1.67 g/t Ag and an additional 421.8 metres averaging 0.28% Cu, 1.24 g/t Ag and 0.026% Mo. The last portion of 144.4 metres of the latter intersection confirmed previously reported results, and this historical hole will now constitute a depth expansion in the upcoming MRE update. Drill holes 30-1132 and 30-1137, located near the eastern margin of the 2024 MRE model, cut multiple intersections of mineralization, 15 to 125 metres thick and distributed in “layer cake” fashion from surface, including 125.2 metres averaging 0.20% Cu, 1.25 g/t Ag and 0.009% Mo (expansion in 30-1137), extending mineralization in this area to vertical depths of 783 and 851 metres, respectively. Drill hole 30-1135, located in the south-central portion of the 2024 MRE model, cut