NorthWest Copper Corp. announce an updated mineral resource estimate for the Kwanika Central deposit at its 100% owned Kwanika-Stardust Project, (the ?Project?), comprising the Kwanika Central, Kwanika South, and Stardust deposits. NorthWest plans to use the updated Mineral Resource estimate to support an updated Preliminary Economic Assessment (?PEA?) targeted for completion in mid 2026.

Highlights Kwanika Central Deposit: Indicated Mineral Resource: 16.22 million tonnes (?Mt?) grading 0.63 % Cu, 0.74 g/t Au, 2.0 g/t Ag or 1.27 % CuEq, for 226.6 million lbs (?Mlbs?) of Cu, 383 thousand ounces of gold and 1,035 thousand ounces of silver. Inferred Mineral Resource: 28.97 Mt grading 0.48 % Cu, 0.63 g/t Au, 1.5 g/t Ag or 1.05 % CuEq, for 307.6 Mlbs of Cu, 589 thousand ounces of gold and 1,393 thousand ounces of silver.Open Pit Mineral Resources: Indicated Mineral Resource: 8.99 Mt grading 0.55 % Cu, 0.51 g/t Au, 1.8 g/t Ag or 0.98 % CuEq, for 109.5 Mlbs of Cu, 148 thousand ounces of gold and 512 thousand ounces of silver. Inferred Mineral Resource: 9.18 Mt grading 0.33 % Cu, 0.35 g/t Au, 1.0 g/t Ag or 0.63 % CuEq, for 66.1 Mlbs of Cu, 104 thousand ounces of gold and 300 thousand ounces of silver.

Underground Sub-Level Cave (?SLC?) Mineral Resources: Indicated Mineral Resource: 7.23 Mt grading 0.73 % Cu, 1.01 g/t Au, 2.3 g/t Ag or 1.64 % CuEq, for 117.0 Mlbs of Cu, 235 thousand ounces of gold and 523 thousand ounces of silver.Inferred Mineral Resource: 19.8 Mt grading 0.55 % Cu, 0.76 g/t Au, 1.7 g/t Ag or 1.24 % CuEq, for 241.5 Mlbs of Cu, 485 thousand ounces of gold and 1,093 thousand ounces of silver. The Mineral Resource estimate for Kwanika Central was supported by verified data, robust geological models, well-defined mineralized zones, constrained by informed open pit shells and underground sub-level cave mining shapes and optimized to support mid-size bulk mining open pit and sub-level cave mining studies. Technical sub-studies on metallurgical variability testing and power are now underway to support an updated PEA targeted for completion by mid 2026.