Midnight Sun drills 14.86 m of 7.39% Cu at Kazhiba Main

Executive Summary

• Midnight Sun Mining Corp. released initial assay results from eight diamond drill holes at the Kazhiba Main target, highlighting high-grade oxide copper mineralization.
• The most significant intercept was 7.39% Cu over 14.86m, including a high-grade interval of 16.9% Cu over 4m.
• The 2025 resource edge definition campaign at Kazhiba Main is complete (163 holes, 5,243m), with assays from the RC program pending for a maiden NI 43-101 resource estimate expected in Q4 2025.

Key Details

• Significant Intercepts (Kazhiba Main):
  • Hole MSZ-25-029E: 7.39% Cu over 14.86m, including 16.9% Cu over 4m (from 17m to 31.86m depth).
• 2025 Drilling Campaign Status:
  • Kazhiba Main resource edge definition campaign is complete with 163 holes totaling 5,243m.
  • Diamond drilling at Kazhiba Main is expected to continue through the end of November 2025.
  • Assays for the 2025 Reverse Circulation (RC) program are pending and will be incorporated into the maiden NI 43-101 resource estimate.
• Kazhiba East Program:
  • RC drilling program is now underway to test three partial ionic leach soil sample copper anomalies.
  • Planned for 100 RC drill holes to test for expansion potential of near-surface oxide resources.
• Due Diligence Redrilling (Kazhiba Main):
  • 41 holes are being redrilled using diamond methods to verify intervals previously misidentified as subsurface cavities due to technical issues with wet soils during the 2024 RC program.
  • Early observations suggest the voids do not exist and may represent significant copper intercepts.
  • Redrilling is being conducted at the driller's cost.
• Historical High-Grade Intervals (2024 RC Program):
  • Hole MSZ22-028: 10.69% Cu over 21.0m.
  • Hole MSZ22-020: 5.60% Cu over 26.0m.
  • Hole MSZ22-012: 3.01% Cu over 15.0m.
  • Hole MSZ22-030: 4.66% Cu over 7.0m.
• QA/QC Protocols:
  • Samples analyzed at SGS Labs in Kalulushi, Zambia.
  • Processing: Dried, crushed, pulverized (SGS code PRP90), single-acid digest with AAS finish (SGS code AAS72C).
  • Copper detection range: 0.01 to 20%.
  • Overlimit samples rerun via Electrogravimetric method (SGS procedure ELC13GD).
  • In-house QA/QC includes random insertion of blanks, duplicates, and certified reference materials every 10th sample.

Notable Quotes

• Al Fabbro, President and CEO: "We are quickly and systematically marching Kazhiba toward a maiden resource, due before the end of the year. Kazhiba Main is an extraordinary, high-grade, near-surface opportunity, and our team has taken all the right steps to properly define this unique, highly variable, oxide copper deposit."