Star Copper drilling final phase 1 hole at Star

Mr. Darryl Jones reports STAR COPPER NEARS COMPLETION OF PHASE 1 DRILLING AT STAR PROJECT WITH STRONG STRUCTURAL AND MINERALIZATION INSIGHTS Star Copper Corp. has completed hole E (S-054A) and made progress on the final phase 1 drill hole F (S-055) at its flagship Star project in northwestern British Columbia. Phase 1 drilling comprised six drill holes, which have successfully expanded the known mineralized supergene footprint while refining geological and structural controls on copper mineralization. Hole E: structural zoning confirmed in chargeability high Hole S-054A was collared at the eastern margin of the Star Main system to test a coincident magnetic and IP (induced polarization) chargeability high, with the objective of confirming mineralization continuity from historical hole S-025. The hole intersected a sequence of Late Triassic Stuhini Group volcanic and epiclastic rocks, overprinted by phyllic alteration with local potassic zones. Chalcopyrite mineralization was observed primarily as fine disseminations and in quartz sulphide veinlets, often accompanied by pyrite. Multiple fault zones and breccias intersected throughout the hole helped map the structural framework guiding mineralization. The hole achieved its objective of clarifying alteration zonation and mineral controls across the geophysical anomaly, offering critical guidance for future stepout drilling. For added clarity, supergene enrichment, also known as secondary enrichment, is a geological process where valuable metals are concentrated near the Earth's surface, enhancing the grade of existing mineralized deposits. Chalcopyrite mineralization refers to the occurrence of chalcopyrite, a copper iron sulphide mineral (CuFeS2), within various geological formations and mineralized deposits. Company chief executive officer Darryl Jones notes: "With the confirmation and extension of the supergene zone, we continue to develop an increasingly clear picture of a very exciting near-surface supergene copper zone rarely seen in these parts. Our 2025 phase 1 drill campaign was focused on testing and confirming the evidence to our satisfaction. As a result, we are excited to move forward with identifying the high-grade extension and then pushing to build out the Star target at depth along with new exploration at the proximal Star North and Copper Creek targets." Hole F: advancing through oxide and hypogene copper zones The drilling at the sixth and final hole of the phase 1 program, hole F (S-055), is currently under way, having reached a depth of 188 metres, and is designed to test the southern margin of the previously identified IP anomaly. Located near historical holes S-017 and S-019, which intersected near-surface supergene copper, hole F is targeting mineralized quartz monzodiorite (QMD) and probing deeper into a magnetic high. Early observations confirm malachite and azurite in the oxide zone, while deeper sections are expected to intersect hypogene copper mineralization. Since hypogene mineralization involves ascending fluids from deep within the Earth, this hole is intended to test the extent of the copper footprint to the south and refine the understanding of vertical and lateral mineral zonation. Phase 1 program highlights and next steps Upon the completion of hole F (S-055), Star Copper's phase 1 six-hole drill program has successfully accomplished several important tasks, which include: Confirmation of copper mineralization in multiple intrusive phases; Refined structural and alteration models, including potassic halos and supergene enrichment; Expanded the supergene mineralized footprint at the Star Main zone up to 250 metres by 300 metres. The technical team is now incorporating these results into a refined 3-D model to guide a follow-up phase 2 drill program slated for the fall season of 2025. This next phase will prioritize stepouts into newly defined targets and further test structural and geochemical continuity across the broader Star property. Qualified person Jeremy Hanson, PGeo, a qualified person as that term is defined under National Instrument 43-101, is an independent contractor of the company, and has reviewed and approved the technical aspects of this news release. About Star Copper Corp. Star Copper is an exploration and development company focused on developing high-potential copper projects in mining-friendly jurisdictions. The company aims to advance its British Columbian flagship Star project, where significant exploration work, including historical drilling, has confirmed open mineralization at depth and in all directions. Star Copper's strategic plans include geological mapping and geophysical surveys to refine existing targets,diamond drilling programs to test high-priority zones, environmental baseline studies and permitting groundwork, alongside data analysis and resource modelling, to support a future resource estimate prepared in accordance with NI 43-101. The company further plans to advance its Indata project with follow-up drilling to expand on previous high-grade copper and gold intercepts, trenching and surface sampling to delineate mineralized zones, and infrastructure improvements for site accessibility and operations. With a commitment to sustainable development and value creation, Star Copper aims to position itself to support surging industrial demand to meet growing global electrification needs. We seek Safe Harbor.