Mr. Craig Hallworth reports

GUNNISON COPPER ACHIEVES COMMERCIAL PRODUCTION AT JOHNSON CAMP MINE

Gunnison Copper Corp.'s Johnson Camp mine (JCM) in Cochise county, Arizona, achieved commercial production in September, 2026, following record monthly copper production in August and continued production above the required operating threshold through the first half of September.

Johnson Camp produced 1,304,448 pounds of copper cathode in August, 2026, representing the highest monthly production since operations restarted. production continued at strong levels in September, with 894,767 pounds of copper cathode produced through Sept. 17, 2026. The sustained operating performance achieved during September supports the company's determination that Johnson Camp has reached commercial production.

Production highlights

• August, 2026, copper cathode production: 1,304,448 pounds;
• Sept. 1 to Sept. 17, 2026, copper cathode production: 894,767 lb;
• Commercial production achieved: September, 2026;
• Johnson Camp has a nameplate production capacity of up to 25 million pounds of copper cathode per year, which the company is ramping up to.

Craig Hallworth, president and chief executive officer of Gunnison Copper, commented:

"Achieving commercial production at Johnson Camp is an important milestone for Gunnison and reflects the tremendous effort of our team and our partners at Nuton. Following record production of more than 1.3 million pounds of copper in August, the continued operating performance through September demonstrates the progress we have made in establishing sustained operations at Johnson Camp.

"More importantly, Johnson Camp is delivering on Gunnison's mission to produce and reliably supply Pure American Copper from Southern Arizona. Our copper is mined and converted into finished copper cathode at site, providing domestically produced metal to support America's defence, energy and technology supply chains. We are proud of what the team has accomplished and look forward to continuing the ramp-up toward Johnson Camp's full production capacity."

Pure American copper

Johnson Camp produces 99.999 per cent pure copper cathode directly from American ore in Arizona, providing a domestic source of finished copper metal without the need for offshore smelting and refining.

Achieving commercial production at Johnson Camp represents another significant milestone for Gunnison, as the company continues to ramp-up operations toward its nameplate capacity of up to 25 million pounds of copper cathode annually, while advancing its flagship Gunnison project toward development.

About Gunnison Copper Corp.

Gunnison Copper is a multiasset pure-play copper developer and producer that controls the Cochise mining district (the district), containing 12 known deposits within an eight-kilometre economic radius, in the Southern Arizona copper belt.

Its flagship asset, the Gunnison copper project, has a main pit measured and indicated mineral resource containing over 846 million tons with a total copper grade of 0.33 per cent containing 5.19 billion pounds of copper (measured mineral resource of 192 million tons at 0.37 per cent containing 1.42 billion pounds of copper and indicated mineral resource of 655 million tons at 0.31 per cent containing 3.77 billion pounds of copper).

The Strong and Harris satellite deposit, located approximately 1.9 miles from the Gunnison processing facilities, is also included in the mine plan and hosts an inferred mineral resource of 76 million tons grading 0.49 per cent total copper (0.32 per cent CuOx) at a 0.07 per cent cut-off, 0.56 per cent zinc and 0.12 ounce/ton silver, containing approximately 740 million pounds of copper, including 483 million pounds of oxide copper, as well as zinc (856 million pounds) and silver (9.0 million ounces).

A preliminary economic assessment (PEA) was completed in March, 2026, for the Gunnison project yielding robust economics including an NPV 8 per cent (net present value, 8-per-cent discount rate) of $2-billion, IRR (internal rate of return) of 23 per cent and payback period of 3.9 years. It is being developed as a conventional operation with open pit mining, heap leach and SX/EW refinery to produce finished copper cathode on site with direct rail link. The PEA is preliminary in nature and includes inferred mineral resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves. There is no certainty that the conclusions reached in the PEA will be realized. Mineral resources that are not mineral reserves do not have demonstrated economic viability.

In addition, Gunnison's Johnson Camp asset, which is now in production, is fully financed by Nuton LLC, a Rio Tinto Venture, with a production capacity of up to 25 million pounds of finished copper cathode annually.

Other significant deposits controlled by Gunnison in the district, with potential to be economic satellite feeder deposits for Gunnison project infrastructure, include South Star, and eight other deposits.

Dr. Roland Goodgame, senior vice-president of project development of the company, is a qualified person as defined by National Instrument 43-101. Dr. Goodgame has reviewed and approved the technical information contained in this news release.

We seek Safe Harbor.