First Copper Production From Johnson Camp Mine

PHOENIX, AZ – Gunnison Copper Corp. announceD the first production of pure copper cathode from its fully-operational Johnson Camp Mine (JCM) in southeast Arizona commenced in the last week of August 2025, establishing Gunnison as the newest American Copper Producer. Following the successful start-up of the solvent extraction (SX) and electrowinning (EW) circuit, copper cathode is now officially in production from run-of-mine (ROM) ore. Gunnison has achieved this critical milestone ahead of schedule, producing Made-in-America copper for domestic sales.
“This is an incredible moment for Gunnison and for U.S. copper supply. To bring Johnson Camp into production ahead of schedule and with an excellent health and safety record is an achievement we’re extremely proud of,” said Stephen Twyerould, Chief Executive Officer and President. “Even more exciting is that we are now producing 100% American-made copper at a time when our nation needs it most. We extend our gratitude to our dedicated team, valued stakeholders, and especially Nuton LLC, a Rio Tinto venture, whose critical support made this possible.”