Mr. Melissa Mackie reports

GUNNISON COPPER TO COMMENCE TRADING ON NYSE AMERICAN OCTOBER 26, 2026, UNDER TICKER SYMBOL "GUNN"

Gunnison Copper Corp.'s American depositary receipts (ADRs) are expected to commence trading on the NYSE American under the ticker symbol GUNN, effective at the opening of trading on or about Monday, Oct. 26, 2026, subject to the effectiveness of the company's registration statement with the U.S. Securities and Exchange Commission (SEC) and final exchange approvals. Each ADR will represent 30 common shares of the company. Please see additional details below for investors interested in converting Gunnison common shares into ADRs.

The NYSE American listing marks a significant milestone for Gunnison, providing broader access for United States institutional and retail investors to an American copper producer with a major growth project located in Arizona, supplying finished domestic copper to the defence and technology sectors. The listing is expected to enhance the company's visibility in U.S. capital markets and support its strategy to continue expanding domestic copper production at a time when securing critical mineral supply chains has become a national priority.

"Trading on the NYSE American under the symbol GUNN is an exciting next step for our company and an important opportunity to bring Gunnison's story to a broader U.S. investment audience," said Craig Hallworth, president and chief executive officer of Gunnison Copper. "Our country needs more Pure American Copper to support its defence capabilities, energy infrastructure, advanced manufacturing and rapidly expanding technology sector. At Gunnison, we are producing finished copper at our Arizona operation, supplying the U.S. defense sector and Amazon Web Services today, and advancing our nationally significant flagship Gunnison copper project."

"Our NYSE American listing aligns our capital markets presence with where we operate, where our copper is produced and where we see a significant opportunity for future growth. We look forward to welcoming new U.S. shareholders as we continue building a leading American copper company."

Strengthening America's domestic copper supply chain

American-made copper: from mine to finished product

Gunnison's Johnson camp mine is producing finished copper cathode through its on-site SX/EW facility. Copper is mined, processed and refined on-site, eliminating the need for overseas smelting or refining.

Supplying America's defence and technology sectors

Gunnison is supplying copper to the U.S. defence sector and Amazon Web Services, supporting domestic supply chains for national security, artificial intelligence infrastructure and advanced manufacturing.

Proven execution and permitting record

Gunnison advanced Johnson Camp from construction decision to production in less than 18 months. Its established infrastructure, Arizona permitting experience provide a strong foundation for future development.

Significant American copper growth potential

Gunnison is advancing its flagship Gunnison copper project, located approximately 1.5 miles from Johnson Camp, with the potential to substantially expand U.S. copper production and strengthen America's long-term copper supply security.

NYSE American listing and ADR program

The Gunnison Copper ADR ratio is set at 30 Gunnison Copper common shares for each one Gunnison Copper ADR.

Effective Oct. 26, 2026, Gunnison Copper Level II ADRs are expected to commence trading on the NYSE American under the ticker symbol GUNN, subject to the effectiveness of the company's registration statement with the United States Securities and Exchange Commission (SEC) and final exchange approvals.

The Gunnison Copper Level II ADR listing on the NYSE American under ticker symbol GUNN is complementary to the company's other stock exchange listings and does not affect the company's currently listed common shares on the Toronto Stock Exchange (TSX) under the symbol GCU or on the Frankfurt Stock Exchange (FSE) under the symbol 3XS0.

Commencing on Oct. 23, 2026, United States shareholders may convert Gunnison Copper common shares into ADRs through The Bank of New York Mellon (BNY), the depositary bank for the Gunnison Copper ADR program, subject to applicable fees and the terms of the deposit agreement. For details on how to complete the conversion process please refer to the FAQ (frequently asked questions) available on the company's website.

BNY facilitates the issuance and cancellation of Gunnison Copper ADRs in accordance with instructions received from market participants. The Gunnison Copper ADR program will operate in accordance with a deposit agreement filed with the SEC. Investors wishing to convert Gunnison Copper common shares into ADRs may instruct their broker or custodian to arrange delivery of the common shares to BNY's designated custodian in accordance with the applicable conversion procedures. For questions regarding the issuance and cancellation of ADRs, shareholders may contact BNY at canadadrconversions@bny.com.

Conversion is optional, and existing shareholders are not required to take any action in connection with the NYSE American listing. Shareholders who wish to continue holding their Gunnison Copper common shares on the TSX may do so without any change to their holdings.

The Gunnison Copper Level II ADR program does not constitute a new offering of securities and, therefore, no additional common shares are being issued nor is any capital being raised in connection with the listing of Gunnison Copper ADRs on the NYSE American. Moreover, nothing herein shall be deemed to constitute an offer to sell or a solicitation of an offer to buy securities.

ADRs are negotiable U.S. securities that represent a non-U.S. company's equity. ADRs trade in U.S. dollars and facilitate cross-border trading.

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 (net present value) 8 per cent 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.