Mr. Darryl Jones reports

STAR COPPER REPORTS "DRILL IS TURNING" AT COPPER CREEK TARGET IN GOLDEN TRIANGLE OF BC

Star Copper Corp. has commenced first-pass drilling at the Copper Creek satellite target, located approximately 2.2 kilometres southeast of Star Main within the company's flagship Star project in northwestern British Columbia. This campaign follows several weeks of target refinement, drill pad construction and mobilization, advancing Copper Creek from a drill-ready concept to active testing.

"Having the drill start turning at Copper Creek marks an exciting milestone as we broaden our exploration footprint beyond our Star Main project area," stated Darryl Jones, chief executive officer of Star Copper. "The integration of modern geophysics, soil analysis and detailed mapping delivered clear targets for exploration. With the drill pads completed and the first of two planned [approximately] 400-metre holes under way, we are eager to test this structurally focused copper-gold system and report results as they become available."

Copper Creek target overview

Copper Creek comprises two copper-in-soil and gold-in-soil trends that coincide with IP chargeability and magnetic highs. Field crews have mapped widespread copper at surface, notably chalcopyrite with malachite and azurite, across both the upper and lower gullies. In the upper gully, mapping and sampling were complemented by soil infill grids over the strongest chargeability response. In the lower gully, which hosts the bulk of historical work, detailed mapping, sampling and structural analysis confirm a complex, broadly east-west structural corridor that focuses mineralization. These observations align with the project's geologic framework and prior public description of the target area.

Historic and recent work

Historic programs at Copper Creek include prospecting, trenching, limited 1970 drilling, and 2013 geophysical and geochemical surveys. These data sets were recently reinterpreted with 3-D inversion and Leapfrog modelling, integrating historic drill and soil results to refine collar positions and priority trends. The 2025 field season built on this work with new geological traverses through the gully system, ground truthing of historic sites and expanded geochemical coverage to tighten structural controls and advance target ranking ahead of drilling.

Planned drill program

With pads established and equipment on site, the company has initiated a two-hole, approximately 400-metre first-pass program designed to:

• Confirm historic mineralized intervals from earlier drilling;
• Test high copper-gold soil and rock XRF (X-ray fluorescence) anomalies coincident with strong IP (induced polarization) chargeability across the east-west structural corridor in the lower gully.

This initial program is intended to validate the structural-geochemical model at Copper Creek and provide vectors for follow-up stepouts. Drilling updates will be provided as the program advances and once assays are received and reviewed under the company's quality assurance/quality control procedures.

QA/QC 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.

XRF is a portable analytical tool used to obtain rapid, on-site estimates of metal content in rock samples during early-stage exploration. The readings reflect only a very small portion of the analyzed rock surface and are not necessarily representative of overall grades or assay results.

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, 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.

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