Dr. Stephen Twyerould reports

GUNNISON COPPER ANNOUNCES UPSIZE OF THE LISTED ISSUER FINANCING EXEMPTION (LIFE) PRIVATE PLACEMENT TO UP TO C$8.745 MILLION

As a result of strong investor demand, Gunnison Copper Corp. has increased the size of its previously announced non-brokered private placement from aggregate gross proceeds of up to $5,000,010 to aggregate gross proceeds of up to $8,745,000. The upsized offering comprises the sale of up to 29.15 million units of the company at a price of 30 cents per unit. Red Cloud Securities Inc. is acting as a finder in connection with the offering.

Each unit will consist of one common share of the company and one common share purchase warrant. Each warrant will entitle the holder thereof to purchase one common share at a price of 45 cents at any time for a period of 36 months following the issue date.

The company intends to use the net proceeds from the offering to finance additional and follow on work related to the high-value-add work program at the Gunnison copper project, begin long-lead-time drilling and metallurgical testing that will be incorporated in a prefeasibility study for the Gunnison copper project, as well as finance U.S. head office general and administrative expenses (G&A) for an additional 12 months (April, 2026, to March, 2027). U.S. head office G&A for the next nine months to March, 2026, will be financed from existing working capital.

Subject to compliance with applicable regulatory requirements and in accordance with National Instrument 45-106, Prospectus Exemptions, the units will be offered for sale to purchasers in all of the provinces of Canada, except Quebec, pursuant to the listed issuer financing exemption under Part 5A of NI 45-106, as amended by Coordinated Blanket Order 45-935, Exemptions from Certain Conditions of the Listed Issuer Financing Exemption. The securities issuable pursuant to the sale of the units are expected to be immediately freely tradable under applicable Canadian securities legislation if sold to purchasers resident in Canada.

The units may also be sold to purchasers in offshore jurisdictions and in the United States on a private placement basis pursuant to one or more exemptions from the registration requirements of the U.S. Securities Act of 1933, as amended.

The offering is schedule to close on July 17, 2025, and is subject to receipt of all necessary regulatory approvals, including the Toronto Stock Exchange. Finders' fees will be payable in accordance with the policies of the TSX.

There is an amended and restated offering document related to the units being sold pursuant to the listed issuer financing exemption that can be accessed under the company's profile and on the company's website. Prospective Canadian investors purchasing under the listed issuer financing exemption should read this amended offering document before making an investment decision.

About Gunnison Copper Corp.

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

Gunnison exists to develop and operate copper mines in southern Arizona to produce fully made-in-America finished copper cathode to directly supply American energy, defence and manufacturing supply chains. Gunnison proudly hires locally, purchases locally and sells its products for use in America. Gunnison invests in its employees, their families and the communities around it. Gunnison operates safely and responsibly with a focus on technology and positive societal impact while also emphasizing long-term value creation for stakeholders.

Its flagship asset, the Gunnison copper project, has a measured and indicated mineral resource containing over 831 million tonnes with a total copper grade of 0.31 per cent (measured mineral resource of 191.3 million tonnes at 0.37 per cent and indicated mineral resource of 640.2 million tonnes at 0.29 per cent), and a PEA yielding robust economics including a net present value (discounted at 8 per cent) of $1.3-billion, an internal rate of return of 20.9 per cent and a payback period of 4.1 years. It is being developed as a conventional operation with open-pit mining, heap leach and an 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 under construction with first copper production expected in Q3 2025, is fully financed by Nuton, 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 Strong and Harris, South Star, and eight other deposits.

For additional information on the Gunnison project, including the PEA and mineral resource estimate, please refer to the company's technical report entitled "Gunnison Project NI 43-101 Technical Report Preliminary Economic Assessment," dated effective Nov. 1, 2024, and available on SEDAR+.

Dr. Stephen Twyerould, fellow of AusIMM, president and chief executive officer of the company, is a qualified person as defined by National Instrument 43-101. Dr. Twyerould has reviewed and is responsible for the technical information contained in this news release.

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