Star Copper completes phase 1 work at Star

Mr. Darryl Jones reports STAR COPPER PROVIDES SUMMARY OF PHASE 1 EXPLORATION ACTIVITIES AT STAR PROJECT IN NORTHWESTERN BRITISH COLUMBIA Star Copper Corp. has completed its summer 2025 phase 1 drilling and related exploration activities at its flagship Star project in northwestern British Columbia. Phase 1 drilling was designed to test the grade/fault relationship to better target and understand the overall orientation and mineralization of the Star deposit. The company drilled the deepest hole to date at 675 metres in hole C (S-052), which notably intersected overprinted potassic mineralization. Drilling was also successful in confirming and expanding the supergene footprint by 75 metres to the southwest and the overall results were instrumental in the company's election to advance into a phase 2 drill campaign almost immediately. The fully integrated program combined a maiden drilling campaign at Star Main with systematic mapping and sampling across the broader property. The six-hole drill campaign consisted of target holes 2025 A to F (S-050, S-051, S-052, S-053B, S-054A and S-055) and totalled over 2,200 metres, which culminated with the recently completed hole S-055 (2025-F), which intersected a near-surface oxide horizon with visible malachite and azurite (see news release of Aug. 25, 2025) and transitions at depth to chalcopyrite in mineralized quartz monzodiorite, consistent with the company's oxide-to-hypogene model along major structures. The phase 1 drilling expanded the near-surface supergene footprint to the west and southwest, confirmed copper mineralization across multiple intrusive phases, and sharpened the structural and alteration framework, particularly along the Star fault and associated potassic (K-feldspar) alteration corridors. The supergene zone at Star Main is a particularly noteworthy prospect for Star Copper and a relatively rare find for this area of Canada. Supergene enrichment is a geological process where valuable metals are concentrated near the Earth's surface, producing an enhanced grade of ore deposits. Hypogene mineralization involves ascending fluids from deep within the Earth. Chalcopyrite mineralization refers to the occurrence of chalcopyrite, a copper-iron sulphide mineral (CuFeS2), within various geological formations and ore deposits. Samples from the phase 1 program have been shipped to the laboratory, and results will be reported once received and reviewed under quality assurance/quality control protocols. The second phase of drilling plans are already under way based on phase 1 results alongside concurrent widespread exploration work completed during the phase 1 campaign. Field teams advanced several previously surveyed proximal targets to build a pipeline of phase 2 opportunities. At Star North, detailed mapping plus 135 rock and 29 soil infill samples tightened structural and alteration controls; Star East saw mapping and 59 rock samples that refined interpretations of geophysical anomalies; Star West received soil-grid extensions and prospecting to broaden geochemical coverage; and, at Copper Creek, new trail access, mapping and 32 rock samples established logistically ready drill targets. Taken together, the phase 1 work now links the Star Main porphyry system to the surrounding targets and moves Star North and Copper Creek toward drill-ready status with several clearly ranked targets. Company chief executive officer Darryl Jones noted: "Our phase 1 six-hole drill program successfully confirmed copper mineralization in multiple intrusive phases, refined structural and alteration models, including potassic halos and supergene enrichment, and expanded the supergene mineralized footprint at the Star Main zone up to 250 metres by 300 metres. With momentum building, phase 2 is planned for fall 2025 and will pursue targeted stepouts and deeper tests at Star Main while adding exploratory holes at Star North and Copper Creek to expand the copper footprint and unlock new discovery potential across the property. Star Copper looks forward to sharing phase 1 results and launching the next phase of growth at our increasingly intriguing Star project." Marketing update Additionally, the company is pleased to announce that it entered into an updated consulting services agreement dated effective as of Sept. 2, 2025, with Upswitch Media Corp. to provide the company with certain marketing and investor relations services to expand awareness of the company's business and to communicate with the investment community. The services may include, among other things, engaging copywriters, designing ad content and campaigns promoting the company, providing translation services, onboarding ad campaigns with publishers, and tracking, organizing and executing the services through testing and analytic studies. The services will be provided and disseminated through a variety of news and investment community on-line communications channels and may further include print publications where applicable. Upswitch will commence providing the services immediately for an initial term of 60 days. In consideration of the services, and pursuant to the terms and conditions of the agreement, the company has agreed to pay Upswitch an aggregate fee of $1-million. Jeff Gillis, the principal of Upswitch, is located at 2709B 43rd Ave., Suite 1013, in the city of Vernon in the province of British Columbia and will act as primary representative and service co-ordinator. Mr. Gillis may be contacted at 1-604-373-5875 and [email protected]. To the best of the company's knowledge, Upswitch and Mr. Gillis do not currently own securities in the capital of the company. 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, and 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.