Coast Copper completes historical compiling work at CK

Executive Summary

• Coast Copper completed a historical data compilation and field work on its 100 %‑owned Copper Kettle property and expanded the land base by acquiring an additional 267 ha, bringing total acreage to 2,849 ha.
• The newly defined Northwest (NW) zone is part of a >10 km Island Copper porphyry Cu‑Mo cluster; historic drilling shows significant mineralization (e.g., 277.4 m @ 0.20 % Cu & 0.018 % Mo).
• Recent surface sampling identified high‑grade copper and multi‑element skarn targets up to 5.5 km from the NW zone, including rock grabs >2 % Cu and a skarn sample with 0.46 % Cu, 0.66 g/t Au, 55 g/t Ag, 7.53 % Pb and 5.96 % Zn.

Key Details

• Property Expansion: Acquired 100 % interest in an adjacent 267‑ha parcel, increasing total Copper Kettle area to 2,849 ha.
• NW Zone Geology: Part of a >10 km Island Copper cluster; historic BHP drilling (31 diamond holes, 9,072 m and 10 percussion holes, 789.5 m) intersected a porphyry Cu‑Mo system over a 1,800 m strike length with a strong magnetic anomaly.
• Historic Drill Highlights:
• Hole E‑64 – 277.4 m @ 0.20 % Cu & 0.018 % Mo
• Hole E‑69 – 91.5 m @ 0.57 % Cu & 0.017 % Mo (upper skarn band up to 2.93 % Cu over 3 m)
• Hole W‑6 – 88.4 m @ 0.38 % Cu & 0.029 % Mo
• 9 of 17 highlighted historic holes terminated in copper mineralization.
• Soil & Rock Sampling (June Field Program): 29 rock samples collected; notable assays: CK25R14 – 2.21 % Cu, CK25R15 – 2.09 % Cu, CK25R22 – 1.86 % Cu, CK25R18 – 1.81 % Cu, CK25R29 – 1.80 % Cu.
• July Field Program: 39 soil samples + 6 rock samples; key results:
• Skarn target (CK25R34) – 0.46 % Cu, 0.66 g/t Au, 55 g/t Ag, 7.53 % Pb, 5.96 % Zn.
• Soil CK25030 – 2,842 ppm Cu; Soil CK25031 – 1,255 ppm Cu & 4,583 ppm Zn; additional high‑lead and zinc anomalies reported.
• Anomaly Extent: 2025 soil program confirmed a copper anomaly north of the NW zone measuring ~800 m × 400 m at ≥200 ppm Cu cutoff; not yet drill tested.
• Potential for Expansion: Compilation indicates mineralization could extend both deeper and laterally onto ground previously unowned by BHP, with glacial till masking underlying ore zones.
• Qualified Person: Technical information reviewed and approved by Wade Barnes, P.Geo., qualified under NI 43‑101.

Notable Quotes

“Our strategy of acquiring exploration projects is starting to pay dividends… the significance of the NW zone has been documented in a paper authored by distinguished BHP geologists…” – Adam Travis, CEO, Coast Copper Corp.

All forward‑looking statements are subject to risks and uncertainties; readers should refer to the company’s full disclosures.