The PEA was completed by M3 Engineering & Technology Corporation ("M3") of Tucson, AZ and is effective as of February 22, 2026. The Technical Report (the "Report") summarizing the results of the

PEA and prepared in accordance with National Instrument ("NI") 43-101, will be filed on SEDAR+ and GCC's website within 45 days of this news release.

Read the full release here

For further details regarding the PEA, please refer to the press release dated February 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+ at www.sedarplus.ca.

3D View of Gunnison Project Infrastructure