Hercules drills 420.62 m of 0.6% Cu at Hercules

Executive Summary

• Hercules Metals released further 2025 drilling results from its Leviathan porphyry copper discovery in Idaho, highlighting thick, continuous footwall mineralization and strong hypogene enrichment with significant copper, silver, and molybdenum grades.
• Phase II magnetotelluric (MT) and ELF geophysical surveys infilled a multikilometre anomaly, delineating up to five discrete high-conductivity centers, including a new footwall anomaly, with plans to test them during the 2026 drill season.
• The company has secured a 2026 drilling contract with Dorado Drilling USA and is initiating an order-of-magnitude study ahead of a maiden resource estimate for both near-surface silver mineralization and the Leviathan copper porphyry system.

Key Details

• HER-25-15 Intercepts: 420.62 m of 0.60% Cu, 6.0 g/t Ag, 65 ppm Mo; including 112.78 m of 1.38% Cu, 14 g/t Ag, 40 ppm Mo.
• HER-25-17 Intercepts: 46.03 m of 2.17% Cu, 16.0 g/t Ag, 44 ppm Mo; including 6.1 m of 12.52% Cu, 11.3 g/t Ag, 80 ppm Mo.
• HER-25-17 Extended Section: 585.22 m of 0.39% Cu, 2.1 g/t Ag, 49 ppm Mo; ending in 70.1 m of 0.50% Cu and 117 ppm Mo, with a final 12.19 m of 0.62% Cu and 142 ppm Mo.
• Geophysical Survey: Phase II MT+ELF survey infilled a multikilometre conductivity anomaly, delineating up to five discrete high-conductivity centers planned for 2026 testing.
• Footwall Anomaly: A new conductive center identified at the northern end of the footwall zone; HER-25-17 intersected its top, showing increasing grades away from the lower porphyry contact, potentially indicating an untested deep-seated early porphyry center.
• 2026 Drilling Plans: Contract signed with Dorado Drilling USA; operations to resume after final 2025 assays are received and an updated 3-D geological model is completed.
• Resource Estimate Preparation: Company is engaging a specialized consulting firm to conduct an order-of-magnitude study to assess drilling requirements and data gaps prior to a maiden resource estimate for near-surface silver and the Leviathan copper porphyry system.
• Assay & QA/QC Protocols: Core samples analyzed at MSA Labs (Elko, NV / Langley, BC) via IMS-230 method (ICP-MS/ES for 48 elements). High-grade samples re-analyzed via ICF-6 methods. Gold analyzed via CPA-Au1 and FAS-111. QA/QC includes blind CRMs, blanks, and duplicates.
• Qualified Person: Dillon Hume, PGeo, Vice-President, Exploration.