High-Grade Drill Intercepts at Minto North West Zone and Ridgetop Zone Confirm the Potential of the Minto Copper-Gold-Silver System

Executive Summary

• Selkirk Copper reported high‑grade intercepts from its 2025 drill program, notably 4.96% Cu / 0.85 g/t Au / 18.67 g/t Ag over 9.9 m in the Minto North west zone and multiple >1% Cu intervals in the Ridgetop zone.
• The drill program is 64% complete (32,026 m of 50,000 m planned) across 121 holes; drilling will resume mid‑January 2026.
• Preliminary metallurgical testwork shows promising improvements to copper recovery and potential for gravity‑based gold/silver recovery; engineering trade‑off study continues with Hatch Ltd. and SRK Consulting.

Key Details

• Minto North west zone: 4.96% Cu, 0.85 g/t Au, 18.67 g/t Ag over 9.9 m (hole 25SCM009, from 225.1 m); broader zone 2.34% Cu, 0.43 g/t Au, 8.69 g/t Ag over 24.0 m.
• Ridgetop zone:
• Hole 25SCM006 – 1.46% Cu, 0.47 g/t Au, 4.04 g/t Ag over 14.7 m (90.3‑105 m).
• Hole 25SCM004 – 2.20% Cu, 0.80 g/t Au, 4.52 g/t Ag over 7.0 m (115‑122 m).
• Program Progress: 32,026 m drilled (64% of target), 121 holes completed; zone breakdown: Minto North 28 holes/8,979 m, Ridgetop 58/11,911 m, Minto East 15/5,406 m, Copper Keel 7/1,990 m, Area 118 13/3,740 m.
• Future Drilling: Remaining focus on Ridgetop, Copper Keel, Minto East, Minto North, plus greenfield targets and the “Inferno” zone; resume mid‑Jan 2026.
• Metallurgical Testwork (Phase 1): Conducted at Blue Coast Research Ltd.; early results indicate:
• Coarser primary grind size maintains high Cu recovery while reducing mill power consumption.
• Flotation tests improve Cu recovery from partially oxidized material, potentially converting waste to minable resource.
• Gravity‑assisted Au/Ag recovery under investigation.
• Trade‑Off Study: Ongoing engineering design (mine planning, processing, tailings, water management) with Hatch Ltd., SRK Consulting, and Selkirk First Nation consultants.
• QA/QC: NQ core drilling; 15% insertion rate for QA/QC standards; samples processed by ALS labs (ISO/IEC 17025 accredited); no significant analytical issues reported.
• Mineral Resource Update (effective 2025‑04‑07):
• Indicated resources: 12,588 kt at $138.08/tonne NSR, 1.203% Cu, 0.461 g/t Au, 4.3 g/t Ag.
• Inferred resources: 23,658 kt at $123.48/tonne NSR, 1.048% Cu, 0.387 g/t Au, 3.9 g/t Ag.
• Annual General & Special Meeting (Dec 17 2025): Shareholders approved directors, auditor appointment, stock option plan, and articles amendment; 65,827,507 shares (~52% of outstanding) voted.

Notable Quotes

“I am extremely pleased with results at the Minto North west zone which confirms our view that this zone has significant growth potential… I am particularly encouraged by initial results from the Ridgetop geometallurgical testwork which is showing potential for significant improvements in copper recovery…” – M. Colin Joudrie, President & CEO

All material figures are taken directly from the release; forward‑looking statements are subject to the usual risk factors.