Mr. Darryl Jones reports

STAR COPPER ADVANCING CANADA'S NEXT CU-AU PORPHYRY DISCOVERY WITH COMPLETION OF THREE STEP-OUT HOLES AT STAR MAIN

Star Copper Corp. has completed three phase 2 drill holes at the Star Main target of its 100-per-cent-owned and fully permitted 6,829-hectare (approximately 16,875-acre) flagship Star project in northwestern British Columbia's Golden Triangle region.

Building toward 2026, with additional assays pending

With S-058 through S-060 complete, phase 2 drilling at Star Main continues to expand the copper footprint to the north and west while sharpening vectors to the potassic core that underpins the project's larger-scale potential. These holes, together with continuing work at the company's satellite targets, position Star Copper to deliver a steady cadence of results and to define a data-driven 2026 program focused on stepouts and deeper testing aimed at advancing Canada's next copper-gold porphyry discovery. Eleven drill holes are still pending on the 2025 campaign.

Star Copper chief executive officer Darryl Jones enthused: "For those who have been following our ongoing news, these three holes move the Star Main system forward on multiple fronts. We've extended mineralization into new panels, strengthened the link between potassic alteration and chalcopyrite at depth, and added corridors displaying significant veining density where it matters the most. With assays pending and advancements across the entire Star Main, North, East and Copper Creek targets, we are very excited by what we're seeing from our exploration campaigns this year. The holes were sited within the Star Main target area to extend mineralization north and west of recent collars and to tighten the geologic framework linking near-surface copper oxide mineralization with hypogene vein and dissemination-hosted chalcopyrite mineralization in potassic-altered intrusives and associated vein networks.

Core logging highlights include a near-surface (supergene) oxide profile in hole S-058, transitioning to chalcopyrite-bearing D-type veining at depth. Hole S-059 shows potassic (K-feldspar) alteration with sheeted quartz-pyrite-chalcopyrite veinlets, and locally abundant quartz-chalcopyrite veining with K-feldspar vein halos are visible in hole S-060.

Hole S-058 (Star Main -- northern step)

Hole S-058, drilled vertically, cut oxidized quartz monzodiorite (QMD) before transitioning into a layered volcanic sequence (plagioclase-porphyry and andesite tuffs) marked by propylitic chlorite-epidote-magnetite alteration and local vein-related potassic halos. Below approximately 130 metres, the core is densely veined by quartz-pyrite-chlorite-magnetite-chalcopyrite (D-type) veins, with chalcopyrite increasing with depth in these vein sets. This trend is consistent with the northward continuation of Star Main's hypogene system and historic mineralization to the south at S-037.

Hole S-059 (Star Main -- south-directed test across fault structures)

Drilled to 317 metres, S-059 was designed to probe steep structures and intrusive contacts in the north-central Star Main area above a prominent IP (induced polarization) chargeability high. This hole intersected fractured QMD cut by discrete clay-rich faults zones that provided fluid-abundant hydrothermal fluid pathways. Logging records are pervasive to patchy potassic (K-feldspar) alteration, magnetite accessories and sheeted quartz-pyrite-chalcopyrite veinlets with local stockwork development, features typical of the outer core of porphyry copper systems and aligned with the corridor tested to the south by S-056/S-057.

Hole S-060 (Star Main -- west-dipping test of vein corridors)

S-060 targeted the central to eastern vein networks at Star Main and encountered well-developed K-feldspar vein halos and sheeted to stockwork quartz-chalcopyrite veining, with local sulphide-cemented breccia textures. The combination of strong vein density, potassic and biotite alteration, and subordinate pyrite is consistent with proximity to the potassic core of the system.

Assay results for S-058, S-059 and S-060 will be shared as soon as they are available and reviewed under the company's quality assurance/quality control protocols.

Key take-aways:

• 11 holes still pending for assay results;
• Robust 2025 program to drive planning of 2026 campaign to unlock the true nested porphyry model;
• Mineral deposit open in multiple directions and at depth allowing for project expansion.

Marketing update

The company is pleased to announce that it has entered into an updated consulting services agreement dated effective as of Nov. 14, 2025, with Upswitch Media Corp., whereby Upswitch will continue 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 $500,000.

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 info@upswitchmedia.com. To the best of the company's knowledge, Upswitch and Mr. Gillis do not currently own securities in the capital of the company.

Quality assurance/quality control statement

Star Copper follows industry standard protocols for diamond drilling and QA/QC procedures in British Columbia. All drilling is carried out using HQ- and NQ-sized diamond drill core. Drill core is transported from the drill site to a secure core logging facility where it is logged, photographed and sampled under the supervision of geologists. Core is cut in half using a diamond saw, with one-half of the core placed in a sealed sample bag and sent for analysis, and the other half retained on site for reference and further studies.

Samples are shipped under chain-of-custody protocols to Bureau Veritas Laboratories, an ISO/IEC 17025-accredited laboratory. At Bureau Veritas, samples are dried, crushed, split and pulverized to 85 per cent passing 200 mesh. Analytical procedures include multielement ICP-ES/MS following four-acid digestion, with gold and precious metals analyzed by fire assay with an atomic absorption or ICP finish.

Star Copper implements a robust QA/QC program, including the insertion of a minimum 5-per-cent certified reference materials (standards), blanks and field duplicates at regular intervals into the sample stream to monitor analytical accuracy and precision. The performance on the blind standards, blanks and duplicates achieved high levels of accuracy and reproducibility and has been verified by Jeremy Hanson, a qualified person as defined by National Instrument 43-101.

Qualified person

Jeremy Hanson, PGeo, a qualified person as that term is defined under NI 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 100-per-cent-owned Star project in British Columbia's prolific Golden Triangle and Sheslay district. The project hosts multiple copper-gold porphyry-style targets, including Star Main, Star North and Copper Creek. Significant exploration, 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.