Gunnison Copper Corp
Multi-asset pure-play copper developer and producer controlling the Cochise Mining District in Southern Arizona
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Investor Insight
Why this opportunity matters now
Gunnison Copper Corp. (TSX: GCU | OTCQB: GCUMF | FSE: 3XS0) is America's newest copper producer, operating the Johnson Camp Mine (JCM) in Cochise County, Arizona and advancing its flagship Gunnison Copper Project — one of the most substantial open-pit copper development assets in the United States. With a 2026 PEA reporting an after-tax NPV8% of approximately US$2.0 billion and an IRR of 22.5%, the Gunnison Project is positioned as a key domestic solution to the global copper supply deficit.
Gunnison controls the Cochise Mining District, encompassing 12 known copper deposits within an 8 km economic radius in the Southern Arizona Copper Belt. The company's Johnson Camp Mine reached first commercial copper cathode sales in 2025 and operates in partnership with Nuton LLC, a Rio Tinto venture deploying advanced bio-leaching technology to expand production and unlock the district's sulfide potential. Gunnison fully eliminated its Nebari secured debt in early 2026, entering a debt-free position as it advances financing for the Gunnison open-pit project. The company's 100% Made-in-America copper cathode is targeted directly at U.S. energy, defense, data center, and manufacturing supply chains — markets facing a structural domestic copper shortage.
Company Overview
Who Gunnison Copper Corp is and what they do
Gunnison Copper Corp. is a multi-asset pure-play copper developer and producer headquartered in Phoenix, Arizona. Formerly known as Excelsior Mining Corp., the company rebranded in November 2024 and trades on the TSX (GCU), OTCQB (GCUMF), and Frankfurt Stock Exchange (3XS0). Gunnison develops and operates copper mines in Southern Arizona to produce fully Made-in-America finished copper cathode, supplying domestic energy, defense, and manufacturing supply chains.
The company controls the Cochise Mining District in southeastern Arizona, comprising 12 known copper deposits within an 8 km economic radius. Its operating asset, the Johnson Camp Mine (JCM), is now producing 99.999% pure copper cathode in partnership with Nuton LLC (a Rio Tinto venture), which is deploying proprietary bio-leaching technologies to expand production capacity to up to 25 million pounds of finished copper cathode annually. Gunnison's flagship development asset, the Gunnison Copper Project, is located approximately 65 miles east of Tucson on the southeastern flank of the Little Dragoon Mountains and is designed as a conventional open-pit, heap leach, SX/EW operation with a direct rail link, producing finished copper cathode on-site. The company prides itself on hiring locally, purchasing locally, and selling its products domestically.
Company Highlights
Key competitive advantages at a glance
Key Assets
The flagship project driving value
Gunnison Copper Project
The Gunnison Copper Project is located approximately 65 miles east of Tucson, Arizona, within the Cochise Mining District on the southeastern flank of the Little Dragoon Mountains. The 2026 PEA, completed by M3 Engineering & Technology Corporation and effective February 22, 2026, outlines a conventional open-pit, heap leach, SX/EW operation with a 21-year mine life producing 99.999% pure LME Grade A copper cathode on-site. The mine plan is primarily focused on oxide copper mineralization with 541 million tons of material expected to be placed on the leach pad at an average grade of 0.43% total copper. The project benefits from a direct rail link for copper cathode delivery, a cement co-product strategy, and incorporation of the nearby Strong & Harris satellite deposit. The Gunnison open pit has 100% private and State land ownership with no federal permitting nexus, supporting a streamlined path to development approval.
Management Team
Experienced leadership driving results
Gunnison Copper is led by an experienced team with deep expertise in copper mine development, operations, and capital markets
Dr. Stephen Twyerould
Dr. Twyerould has over 35 years of experience in the mining industry spanning executive, operations, projects and technical roles, with a focus on copper, gold and nickel. He holds a doctorate in Geology and Geochemistry from the University of Oregon (1997) and a BSc (Hons) in Geology from the University of Melbourne (1984). He is a Fellow of AusIMM and a Qualified Person under NI 43-101.
ProfileRobert Winton, P.Eng
Mr. Winton brings over 20 years of mining management experience to Gunnison. He led the transformation of Johnson Camp Mine from care-and-maintenance to first commercial copper cathode production in 2025. Previously President and GM of Nyrstar Clarksville Inc. and VP Manitoba Business Unit at Hudbay Minerals. Registered Professional Engineer with a BSc in Chemical Engineering from the University of Saskatchewan.
ProfileCraig Hallworth
Mr. Hallworth is the former CFO of the Arizona Business Unit at Hudbay Minerals, where he spent 13 years in finance leadership including work on the Copper World mega-project. Prior to Hudbay, he was a manager at Ernst & Young LLP servicing copper and gold mining clients. He is a CPA and CFA Charterholder and holds an Honours Bachelor of Commerce from Ryerson University.
ProfileDr. Roland Goodgame
Dr. Goodgame has over 30 years of mining industry experience in senior roles at Anglo American PLC (Senior Geologist, Asia/Pacific nickel and copper, 2002–2007) and 14 years at WMC Resources Ltd. He holds a doctorate in Geology and Geochemical Modeling from the University of Oregon and a BSc in Geological Engineering from the Colorado School of Mines.
ProfileMelissa Mackie
Ms. Mackie has extensive experience in investor relations, communications, and stakeholder engagement within the mining sector. She previously held senior roles in capital markets and communications across the resource industry and leads Gunnison's investor relations strategy and corporate communications.
ProfileLatest News
Recent coverage and market updates
Gunnison Copper: A New U.S. Copper Producer at a Time When Supply Matters More Than Ever
Gunnison Copper Corp. (TSX: GCU) Expands Private Placement to C$8.745 Million Amid Demand
Gunnison Copper Corp. Increases Private Placement to C$8.745 Million to Support Growth Initiatives
Gunnison Copper Corp. Seeks C$5 Million for Growth Initiatives in Arizona Copper Projects
Gunnison Copper Corp. Secures C$5 Million Funding for Project Advancements and Growth
Gunnison Copper Corp. Raises C$5M for Project Development and Strategic Advancements
Gunnison Copper Corp. Strengthens Governance and Shareholder Engagement at AGM
