Star Copper District-Scale Campaign Underway with Inaugural Drilling at Star East and Return to Copper Creek

Executive Summary

• Star Copper successfully completed its inaugural drill hole (SE-26-001) at the Star East target, achieving target depth with excellent core recovery and intersecting Cu-Au porphyry-style mineralization and alteration consistent with the broader district-scale Star system.
• Drilling has commenced at Copper Creek South (CC-26-03) with two additional holes planned at Copper Creek North (CC-26-02) to test high-priority IP chargeability and geochemical anomalies.
• The company is advancing a fully funded exploration campaign supported by over $12 million in flow-through financing, with 3D IP and MT surveys planned for late June to refine district-scale targeting ahead of a future maiden Mineral Resources Estimate.

Key Details

• Star East Drilling (DDH SE-26-001): Drilled to a total depth of 230.6 m (340866E, 6457751N; azimuth 100°, dip -63°). Intersected a broad sequence of plagioclase porphyry and andesite ash tuff cut by CKP (crowded pink-feldspar porphyry) intervals.
• Alteration & Mineralization: Broad propylitic to phyllic assemblages overprinting K-feldspar alteration, with stronger potassic development at ~6-23 m, 62-84.6 m, 96-171.9 m, and near the bottom of the hole. Chalcopyrite present from near surface as fine disseminations, pyrite-chalcopyrite stringers, sigmoidal veinlets, and sheeted vein sets.
• Notable Mineralized Intervals: 27.2-30.0 m, 44.4-44.5 m (narrow semi-massive sulphide band with K-feldspar halos), 84.6-88.5 m, 135.5-138.6 m, and 159.0-162.7 m. Interpretation supports Star East as a displaced/related part of the broader Star porphyry system across the Dick Creek Fault.
• Copper Creek North (CC-26-02): Designed to test a robust IP chargeability anomaly associated with coincident Cu-Au soil anomalies along interpreted structural trends within altered volcanic rocks and quartz monzodiorite dike swarms.
• Copper Creek South (CC-26-03): Will test a similar geophysical and geochemical signature approximately 500 metres to the south to evaluate the scale and continuity of the mineralized corridor.
• Historical Context: Historic hole G-2 returned 35.5 m @ 0.485% Cu with localized higher-grade Au. 2025 hole CC-25-001 drilled to 151 m, intersecting 111.0 m @ 0.348% CuEq (0.178% Cu, 0.167 g/t Au) from 40 m.
• Financing & Geophysics: Exploration campaign fully funded by over $12 million in flow-through financing. 3D IP and MT surveys planned for late June 2026.
• Future Campaign Plans: Advance drilling at Star North, return to Star East, and deploy 3D IP/MT at Star Main to refine targeting and advance toward a maiden Mineral Resources Estimate.

Notable Quotes

• CEO Darryl Jones: "We decided to move quickly to commence drilling at some of our satellite locations with the added benefit of early season helicopter while we await the larger geophysical program. With MT and IP being conducted during June 2026 testing these targets became a priority to understand the geologic landscape."
• CEO Darryl Jones: "The commencement of drilling at Copper Creek is an exciting milestone for Star Copper and marks the beginning of what we believe will be a transformational exploration season... Historic drilling, strong surface geochemistry, compelling geophysical signatures and widespread alteration all point toward the potential for a significant copper-gold system."