Dr. Stephen Twyerould reports

GUNNISON COPPER ANNOUNCES RETIREMENT OF DIRECTOR MICHAEL HAWORTH IN CONJUNCTION WITH DIVESTMENT OF GREENSTONE SHAREHOLDINGS

Michael Haworth has retired from Gunnison Copper Corp.'s board of directors. As Mr. Haworth served on the board as a representative of Greenstone, his retirement is occurring following the previously announced distribution and secondary private placement of shares held by the Greenstone group of funds, reflecting the orderly wind-down of the Greenstone Resources II fund as it approaches the end of its investment life cycle.

Mr. Haworth has served as a director of the company since Sept. 5, 2014, and was a member of the board's audit committee and project steering committee, providing valuable financial oversight and strategic guidance during a transformative period for Gunnison as it advances its Arizona copper assets.

Dr. Stephen Twyerould, president and chief executive officer of Gunnison Copper, commented: "On behalf of the management team and knowing Michael the longest, I would like to sincerely thank Michael for his years of service and valuable contributions to Gunnison Copper. Greenstone has been a long-term and supportive partner throughout many important stages of the company's growth, and Michael's insight and guidance have been greatly appreciated. As Greenstone's fund reaches the natural end of its life cycle and completes the exit of its investment in Gunnison, we remain grateful for the role the firm played in helping advance our assets and strengthen the company. We wish Michael well in his future endeavours."

Fred DuVal, chair of the board, added, "On behalf of the board, I'd like to extend our deepest appreciation to Michael for his leadership, insight and support during his over decade tenure as a director."

The company also noted that the distribution and placement of Greenstone's shares has broadened Gunnison's institutional shareholder base as the company continues advancing its Gunnison copper project and operations at Johnson Camp mine in Arizona.

Gunnison expects to further strengthen its board of directors through the addition of new independent directors as the company continues to advance its strategy and support the next phase of growth.

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.

Its flagship asset, the Gunnison copper project, has a measured and indicated mineral resource containing over 846.1 million tons with a total copper grade of 0.33 per cent (measured mineral resource of 191.5 million tons at 0.37 per cent and indicated mineral resource of 654.5 million tons at 0.31 per cent) and a preliminary economic assessment (PEA) yielding robust economics including a net present value (discounted at 8 per cent) of $2-billion, an internal rate of return of 23 per cent and a payback period of 3.9 years. It is being developed as a conventional operation with open-pit mining, heap leach and a solvent extraction/electrowinning (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.

For more information on Gunnison, please visit the company's website. For further details regarding the PEA, please refer to the press release dated Feb. 25, 2026, and titled "Gunnison Copper Announces Updated Preliminary Economic Assessment of Its Flagship Gunnison Copper Project Reporting Post-Tax NPV8 of US$2.0 Billion," which is filed on SEDAR+.

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