Prismo Metals Receives High Ag and Cu Samples at Silver King with Multiple Overlimit Assays Pending.

Executive Summary

• Prismo Metals Inc. reports preliminary assay results from 23 samples taken at its Silver King project in Arizona, confirming exploration potential and identifying three distinct types of mineralization: new polymetallic veins, copper veins, and stratigraphically controlled replacement mineralization.
• Several samples returned high-grade silver values (>200 g/t) and significant copper and gold values, with some assays exceeding detection limits and requiring re-analysis via different methods.
• The company is currently in the permitting stage for an initial drill program of at least 1,000 meters, with a permit expected by the end of October, aimed at testing the pipelike Silver King mineralized body and new vein targets.

Key Details

• Sample Overview: Preliminary results from 23 samples were released, highlighting mineralization types previously identified in August and September 2025 releases.
• Overlimit Assays: Several samples exceeded detection limits for silver, copper, lead, and zinc. Re-analysis is underway, with results expected within approximately two weeks.
• New Mineralized Veins:
  • Polymetallic Vein: Sample 544510 returned >200 g/t Ag, >1.0% Cu, >1.0% Pb, and >1.0% Zn. Sample 544509 returned 26 g/t Ag.
  • Copper Vein: Sample 544553 returned 183 g/t Ag and 0.31% Cu. Sample 544554 returned 198 g/t Ag and 0.29% Cu.
• Stratigraphically Controlled Replacement Mineralization:
  • Located along a northeast-dipping limestone horizon near the contact with a quartz diorite intrusion, similar to the nearby Magma mine.
  • Sample 544507 returned 2.26 g/t Au, 25 g/t Ag, and >1.0% Cu.
  • Sample 544508 returned 0.73 g/t Au, 12 g/t Ag, and >1.0% Cu.
  • Sample 544502 returned 0.47 g/t Au and >1.0% Cu.
  • Sample 544552 returned 35 g/t Ag, 0.14% Cu, >1.0% Pb, and >1.0% Zn.
• Silver King Mine Dump Samples:
  • Sample 544514 (quartz vein material) returned >200 g/t Ag, 1.07 g/t Au, 0.59% Cu, 0.44% Pb, and 0.63% Zn.
  • Sample 544517 (stockwork veins and breccia) returned >200 g/t Ag, 0.04 g/t Au, 0.09% Cu, 0.26% Pb, and 0.43% Zn.
• Drilling Plans:
  • A plan of operations has been submitted to the Forest Service.
  • Drill permit expected by the end of October 2025.
  • Initial drill program planned for a minimum of 1,000 meters.
  • Objectives include testing the upper half of the steeply dipping pipelike Silver King mineralized body and adjacent stockwork mineralization.
  • Future drilling may expand to test new targets, including the polymetallic veins and porphyry-style mineralization.
• QA/QC: Samples analyzed by SGS (preparation in Tempe, AZ; analysis in Burnaby, BC). Controls include standard pulps, coarse blanks, and lab internal controls.
• Project Context: The Silver King project is located 3 km from the Resolution Copper project (Rio Tinto/BHP) and is fully surrounded by Resolution Copper’s claim block. Historic production yielded nearly 6 million ounces of silver.

Notable Quotes

• “These assay results confirm the exploration potential at the Silver King project. Three samples with silver values reported as greater than 200 g/t were taken from the Silver King mine dump and from the new polymetallic vein recognized in our recent exploration program.” – Dr. Craig Gibson, Chief Exploration Officer
• “Much of the focus of the exploration program to date has consisted of a property wide survey of historic mines and prospects surrounding the direct Silver King workings... This work has expanded our geological thinking and resulted in the recognition of several new types of mineralization at the project, providing additional targets for exploration.” – Gordon Aldcorn, President