Mr. Darryl Jones reports

STAR COPPER ADVANCES TO SECOND DRILL TARGET IN BC'S GOLDEN TRIANGLE

Star Copper Corp. has provided the latest update from the 2025 drill program at its 100-per-cent-owned 6,829-hectare (approximately 16,875-acre) flagship Star project in the Golden Triangle of British Columbia. The fully financed campaign focus is on expanding the existing discovery at the Star project, by increasing its knowledge regarding the Star Main, Star North and Star East prospects as the results from continuing fieldwork become available.

Campaign strategy

The 2025 plan targets both the near-surface oxide zones, deep porphyry-style mineralization, and structures associated with the Star fault and Dick Creek fault with up to 4,000 metres amongst six primary drill holes (holes A to F).

The Star Main discovery contains an extensive, near-surface, supergene zone, and the summer drill campaign, as described in a company news release on May 27, 2025, is designed to test both the lateral and vertical continuity of mineralized zones previously identified from over $10-million in prior drilling and exploration campaigns. Star Copper aims to investigate beyond previously drilled depths where mineralization was present, but drill rig capacity was not, in addition to examining newly modelled magnetic and chargeability anomalies.

Operations

Star Copper drill hole A (S_050), collared on the Star Main target, intersected a sequence of classic cal-alkalic porphyry mineralization that has been encountered in previous drilling. Porphyritic volcanic rocks were intersected by a quartz diorite intrusion between 43 metres and 85 metres. With an extensive database of historic drilling and understanding of this zone, drill hole A (S_050) has given the company confirmation that it is in the right spot. The upper 56 metres of the hole define a well-developed supergene enrichment zone, characterized by pervasive copper oxide mineralization, including malachite and azurite. Notably, a nine-metre fault gouge interval at the base of this zone returned elevated copper values based on portable XRF (X-ray fluorescence) readings.

A determination to complete hole A was made upon reaching a depth of 101 metres after encountering a swelling clay gouge within the Star fault, which made further drilling untenable at this location. The interpretation of alteration and mineralization indicates hole A (S_050) sits on the shoulder of a larger potassic core and successfully extends the supergene envelope at Star Main, providing a clear vector for deeper follow-up drilling.

Darryl Jones, Star Copper's chief executive officer, noted: "Based on field measurements and observations, we believe we are drilling a very high-quality copper deposit. The field samples have been prepped for shipment to the lab, and we look forward to reviewing the results, which will be announced as soon as they are available."

Star copper drill hole B (S_051) activities were subsequently prioritized, approved and implemented. The drill contractor undertook to relocate to the second drill pad to commence operations at hole B (S_051). The site is approximately 50 metres west of hole A and, by the end of the week, has already reached depths in excess of hole A and is proceeding as planned. Hole B targets supergene copper and gold mineralization of the Star fault and the goal is twofold: (1) to confirm historic drilling undertaken by the previous operators; and (2) test the western extent of mineralization beneath the Star fault at depth, with an approximately 40-metre step east from the end of the previously drilled S_040 hole, which ended in 120 metres at 0.36 per cent copper and 0.13 gram per tonne gold.

The overall conditions remain excellent, and the outlook ahead is outstanding," added Mr. Jones. "So far, the drill campaign has demonstrated collaborative, real-time decision making as the whole team has thoughtfully and professionally advanced our project through technical and operational decisions in a timely manner without any negative impacts on momentum or budget over the past few days. We are very pleased that our ongoing efforts continue to produce intriguing data every day, which bodes well for the rest of the program ahead."

Marketing update

Additionally, the company is pleased to announce that it entered into an updated consulting services agreement dated effective as of June 16, 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. Either party may terminate the agreement at any time upon providing 30 days of written notice to the other party. The agreement may also be terminated by either party immediately in the event the other party is in material breach of the agreement. 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. 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 adviser to 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, as well as 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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