Mr. Darryl Jones reports

STAR COPPER ANNOUNCES EARLY SEASON MOBILIZATION AND DRILL PROGRAM UPDATE AT STAR PROJECT

Star Copper Corp. has provided an early season exploration and mobilization update for its fully financed 2026 exploration program at its flagship Star project in northwestern British Columbia.

The company has now completed drill pad construction across multiple satellite targets, including Star North, Star East and Copper Creek. This marks a major milestone ahead of the commencement of exploration drilling designed to test the broader district-scale porphyry potential of the overall Star project.

Highlights:

• Drill pads are constructed at Star North, Star East and Copper Creek targets;
• Early season drilling aims to test satellite targets and evaluate a district-scale porphyry model;
• Camp refurbishment and infrastructure expansion completed to support larger 2026 program;
• Initial drilling to be followed by 3-D IP (induced polarization) and MT (magnetotelluric) geophysical surveys;
• Follow-up drilling after IP will allow for additional and deeper targeted drill testing;
• Second drill rig and crew scheduled to arrive in early June.

The 2026 program represents the largest and most comprehensive exploration campaign completed on the property to date and is designed to systematically evaluate multiple targets that exhibit geological, geochemical and geophysical signatures analogous to Star Main.

Company chief executive officer Darryl Jones noted, "Completing drill pad construction across four priority targets is an important operational milestone as we move into what we believe will be a transformational season for the Star project."

At Star East, the company is preparing to conduct the first meaningful drilling of a large (approximately one kilometre by one kilometre) coincident geophysical and geochemical anomaly located roughly 500 metres east of Star Main. Star East is by far the largest footprint of the five porphyry targets but is largely covered with outcrops so no exposed mineralization has been uncovered. The target shares several characteristics with Star Main and is considered a priority discovery target for the 2026 season.

Meanwhile, drill pads at Star East have been strategically positioned to test interpreted structural corridors and potential parallel or offset porphyry centres within the broader Star system.

Initial drilling is expected to focus on Copper Creek and Star North, where previous exploration confirmed copper-gold mineralization associated with coincident chargeability highs and elevated copper-in-soil anomalies. Copper Creek drilling in 2025 focused on outcropping of chalcopyrite veins and historic drilling, which confirmed the existence of a mineralized system. Drilling in 2026 will focus on the geophysical feature roughly 500 metres to the northwest. This is the first modern drilling done over the larger target area at Copper Creek.

"Our technical team has done an excellent job preparing the project for a much larger and more systematic exploration campaign," Mr. Jones continued. "With multiple targets now drill ready, a second drill rig arriving in early June, and with advanced 3-D geophysics planned to refine deeper targets at Star Main, we believe the company is uniquely positioned to evaluate the broader district-scale potential of the system while continuing to advance toward a maiden resource."

The company has also completed substantial upgrades and refurbishment work regarding camp infrastructure to support expanded operations, including accommodations, logistics staging, fuel storage and drill support capacity required for the multirig program.

Following completion of the initial drill phase, Star Copper intends to deploy advanced 3-D induced polarization (IP) and magnetotelluric (MT) geophysical surveys to refine the geological and structural model at depth beneath Star Main. The geophysical data are expected to play a key role in targeting deeper porphyry mineralization and guiding follow-up drilling later in the season. The geophysical team is scheduled to arrive by June 7 to complete detailed 3-D IP and MT surveys expediting detailed imaging of the structures below the currently available IP threshold.

The company remains fully financed for the planned 2026 program through previously completed flow-through financings totalling more than $12-million.

Further updates, including drilling progress, geophysical survey deployment and assay results, will be provided as exploration activities advance throughout the season.

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.

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