Mr. Darryl Jones reports

STAR COPPER ADVANCES INTEGRATED 3D GEOLOGICAL MODELING TO POSITION 2026 DRILL SEASON AS TRANSFORMATIONAL

Star Copper Corp. has provided an update regarding the advancement of its integrated three-dimensional geological model at the company's flagship Star project in northwestern British Columbia.

The evolving 3-D model, coupled with a deep-penetrating 3-D geophysical program slated for 2026, is expected to significantly enhance drill targeting and position the coming drill season as potentially transformational for the company.

The model clearly delineates:

• A well-defined, near-surface supergene enrichment zone;
• A transition oxide zone with localized higher grades along postmineral structures;
• A broad hypogene copper sulphide system that remains open along strike and at depth, extending beyond 700 metres vertically.

The updated 3-D visualization integrates historic drilling results, 2025 drill collar data, surface mapping, structural interpretation and mineralization envelopes.

"Porphyry systems are inherently three-dimensional and vertically extensive," noted Darryl Jones, chief executive officer of Star Copper. "Our 3-D model clearly demonstrates that mineralization extends well below current drilling, and the planned 3-D geophysical survey will allow us to see even deeper into the system. The integration of these data sets positions our 2026 drill program to be a potential game-changing event for the company."

Mr. Jones continued: "The model highlights the vertical continuity of mineralization from surface through the oxide and transition zones into deeper sulphide domains, reinforcing the interpretation of a robust porphyry copper system. Importantly, deeper sulphide mineralization remains open, with limited drilling having tested the full vertical extent of the system."

The company believes that, by combining rigorous 3-D geological interpretation with deep-penetrating geophysical imaging, it is transitioning from incremental exploration toward systematic testing of a potentially large-scale copper system.

3-D modeling plus 3-d geophysics: a fully integrated approach

The company is actively refining its 3-D geological framework to better define intrusive centres, structural controls and mineralized feeder zones. This work will be directly complemented by a deep-penetrating 3-D DCIP (direct-current induced polarization) and MT (magnetotelluric) geophysical survey planned for 2026.

The 3-D geophysical survey is designed to image chargeability and resistivity to depths in excess of 750 metres, with MT resistivity capable of extending beyond 1,500 metres. When integrated into the geological model, this data set is expected to:

• Identify deep chargeability anomalies associated with sulphide mineralization;
• Map intrusive bodies and alteration shells at depth;
• Define structural corridors that may control higher-grade zones;
• Provide a big-picture view of the plumbing system beneath the currently drilled envelope.

Management believes the integration of advanced 3-D modelling with deep-penetrating 3-D geophysics will materially reduce geological risk and sharpen drill targeting ahead of the 2026 drill campaign.

2026 drill program: designed to test scale

The coming drill season is being designed to test both lateral expansion and deeper extensions of the hypogene copper sulphide system. The company expects that integrating geologic modelling and geophysical inversion results will allow for precise vectoring toward the core of the system and previously untested targets at depth.

Further updates on modeling progress and survey mobilization timelines will be provided as and when available.

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 a Canadian mineral exploration company focused on the discovery and advancement of large-scale copper-gold systems in British Columbia. The company's flagship Star project is located in British Columbia's prolific Golden Triangle and hosts multiple high-priority targets and exhibits geological characteristics consistent with significant porphyry copper deposits. The project hosts multiple copper-gold porphyry-style targets, including Star Main, Star North, East and West, Copper Creek, and Copperline. 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.