NYSE American debut expands access to U.S. investors as Gunnison advances its position as a growing American copper producer

Gunnison Copper Corp. (NYSE American: GUNN) (TSX: GCU) (OTCQB: GCUMF) (FSE: 3XS0) an American copper company headquartered in Phoenix, Arizona, is pleased to announce that its American Depositary Receipts have commenced trading today on the NYSE American under the ticker symbol “GUNN”, marking a significant milestone in the Company’s growth and capital markets development.

The NYSE American listing opens a new chapter for Gunnison, expanding access to U.S. institutional and retail investors at a time when American-made copper has become increasingly important to national security, defense readiness, Super Intelligence, advanced manufacturing and the nation’s industrial future.

With production ramping up toward full capacity at its Johnson Camp Mine and significant growth potential at its flagship Gunnison Copper Project, Gunnison offers investors exposure to a growing American copper producer with assets located entirely in Arizona and the ability to produce finished copper cathode on-site.

“Today is a defining moment for Gunnison Copper and an exciting milestone for our shareholders, employees and the future of American copper production,” said Craig Hallworth, President and Chief Executive Officer of Gunnison Copper. “Our NYSE American debut brings our story directly to the U.S. investment community, aligning our capital markets presence with where we operate, where we produce copper and where we see tremendous opportunity for growth.”

NYSE American Listing and ADR Investor Information

Gunnison’s Level II ADRs are now trading on the NYSE American under GUNN, with each ADR representing 30 Gunnison Copper common shares. The Bank of New York Mellon (“BNY”) serves as depositary bank.

Shareholders interested in purchasing GUNN ADRs or converting existing Gunnison common shares are encouraged to review the Company’s comprehensive ADR FAQ:

GUNNISON COPPER – ADR INVESTOR FAQ & CONVERSION INSTRUCTIONS

Key details include:

• NYSE American: GUNN — trading in U.S. dollars.
• ADR Ratio: One ADR represents 30 Gunnison common shares.
• Existing Listings: (TSX: GCU) (OTCQB: GCUMF) (FSE: 3XS0).
• Conversion: Eligible U.S. shareholders may convert existing common shares into ADRs through their broker or custodian, subject to applicable requirements.
• Fee Waiver: ADR issuance fees are waived through January 23, 2027.

The ADR listing does not constitute a new offering of securities. No additional common shares are being issued and no capital is being raised in connection with the listing.

For conversion assistance, shareholders may contact BNY at canadadrconversions@bny.com.

Strengthening America’s Defense and Critical Mineral Supply Chains

Gunnison’s NYSE American debut comes amid increasing U.S. government focus on securing domestic critical mineral production and reducing reliance on foreign supply chains.

Last week, Gunnison welcomed U.S. Secretary of the Interior Doug Burgum and Congressman Juan Ciscomani to its producing Johnson Camp Mine in Cochise County, Arizona, highlighting the strategic importance of American copper production to national security, industrial competitiveness and the nation’s economic future.

The visit underscored the growing alignment between Gunnison’s mission and federal priorities to strengthen domestic mineral production, support American manufacturing and secure critical supply chains. At Johnson Camp, Gunnison mines, processes and produces finished copper cathode on-site, eliminating the need for overseas smelting or refining.

A Significant American Copper Growth Opportunity

Beyond current production, Gunnison is advancing its flagship Gunnison Copper Project, located approximately 1.5 miles from Johnson Camp.

The Company’s March 2026 Preliminary Economic Assessment outlined:

• ~175 million pounds of average annual copper production over a 21 year mine life.
• More than 3.2 billion pounds of copper production over the life of mine.
• US$2.0 billion after-tax NPV (8%), with a 22.5% IRR and 3.9-year payback, based on US$4.60/lb copper.

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.

The flagship Gunnison Project represent a significant opportunity to expand American copper production and strengthen long-term domestic supply security.

“America’s future depends on securing the critical minerals needed to power our economy, defend our nation and support the next generation of technology,” concluded Hallworth. “Gunnison is proud to be part of that future. With our NYSE American listing, we are opening the door to a broader U.S. investor base as we continue building a leading American copper company.”

ABOUT GUNNISON COPPER

Gunnison Copper Corp. is a multi-asset pure-play copper developer and producer that controls the Cochise Mining District (the district), containing 12 known deposits within an 8 km 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% containing 5.19 billion pounds of copper (Measured Mineral Resource of 192 million tons at 0.37% containing 1.42 billion pounds of copper and Indicated Mineral Resource of 655 million tons at 0.31% containing 3.77 billion pounds of copper).

The Strong & 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% total copper (0.32% CuOx) at a 0.07% cutoff, 0.56% zinc and 0.12 oz/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 was completed in March 2026 for the Gunnison Project yielding robust economics including an NPV8% of $2 billion, IRR of 22.5%, 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 funded by Nuton LLC, a Rio Tinto Venture, with a production capacity of up to 25 million lbs 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.

For more information on the Company, please visit our website at www.GunnisonCopper.com.

For additional information on the Gunnison Project please refer to the technical report titled “Gunnison Project NI 43-101 Technical Report, Preliminary Economic Assessment, Cochise County, Arizona, USA” with an effective date of March 18, 2026 filed on SEDAR+ at www.sedarplus.ca.

For additional information on the Johnson Camp Mine please refer to the technical report titled “Johnson Camp Mine NI 43-101 Technical Report, Cochise County, Arizona, USA” with an effective date of March 18, 2026 filed on SEDAR+ at www.sedarplus.ca.

Dr. Roland Goodgame, Senior VP of Project Development of the Company is a Qualified Person as defined by NI 43-101. Dr. Goodgame has reviewed and approved the technical information contained in this news release.