Trinity Financing Investments Hosts Investor Dinner Featuring Gunnison Copper (TSE: GCU.TO | OTC: GCUMF)

Oct 2, 2025

5 min read

We had the pleasure of hosting Gunnison Copper for dinner in late September. Craig Hallworth, Chief Financial Officer, and Melissa Mackie, Investor Relations, outlined the company’s plan to position its Arizona assets as a reliable, low cost, and environmentally responsible source of domestic copper. The flagship Gunnison Project was designed for in situ recovery with solvent extraction and electrowinning, a method intended to minimize surface disturbance and water use, and the company has been working through optimization steps following early ramp up challenges. In parallel, Gunnison has advanced the Johnson Camp Mine where the solvent extraction and electrowinning circuit has restarted and first copper cathode production began in September 2025, supported by a technology and testing pathway with Nuton, a Rio Tinto venture. The corporate transition from Excelsior Mining to Gunnison Copper, the appointment of Mr. Hallworth as Chief Financial Officer, and the build out of a dedicated investor relations function under Ms. Mackie were also discussed. Gunnison’s near term priorities include expanding and refining wellfield development at the Gunnison Project, optimizing solvent extraction and electrowinning performance at Johnson Camp Mine, progressing staged work with Nuton that could lead to a joint venture, and amending state level permits where needed. The team emphasized a straightforward permitting path with no federal permit requirement, continued focus on balance sheet improvement, and sustained community engagement as production scales. With copper demand growing across electrification and infrastructure, and with existing infrastructure, permits, and facilities in place, Gunnison Copper is positioned to create long term value as a modern United States producer.

Gunnison Copper: Advancing Low-Cost U.S. Copper Production

Market Focus

Gunnison Copper (TSE: GCU.TO | OTC: GCUMF) is an Arizona-focused copper company advancing two cornerstone assets: the Gunnison Project and the Johnson Camp Mine. Copper is a critical mineral essential for electrification, renewable energy, and infrastructure, with demand projected to rise sharply as global energy transition accelerates. The Gunnison Project was designed as a low-cost, environmentally responsible in-situ recovery (ISR) operation, while the Johnson Camp Mine provides near-term production through a fully permitted solvent extraction and electrowinning (SX-EW) facility. Together, these assets position Gunnison Copper as a strategic U.S. producer with established infrastructure and a clear path to growth.

Platform and Strategy

Gunnison Copper’s strategy is to optimize operations and expand production across its Arizona asset base. Key elements include:

Advancing the Gunnison Project using ISR technology to minimize surface disturbance and water use while enabling scalable copper production
Restarting and optimizing the Johnson Camp Mine SX-EW plant, with first copper cathode production achieved in September 2025
Collaborating with Nuton, a Rio Tinto venture, to test and potentially deploy advanced leaching technologies that could enhance recoveries and economics
Progressing targeted permitting amendments at the state level while maintaining a straightforward regulatory path without federal permitting requirements
Strengthening the balance sheet and exploring strategic partnerships to support expansion and accelerate development

Recent Progress and Growth

Gunnison Copper enters the second half of 2025 with key milestones underway:

Successful restart of copper cathode production at Johnson Camp Mine, supported by SX-EW optimization
Appointment of Craig Hallworth as Chief Financial Officer and Melissa Mackie as Investor Relations lead, building a strengthened capital markets and communications platform
Ongoing testing and pilot work with Nuton that may unlock higher recoveries and lower costs at both Gunnison and Johnson Camp
Engagement with local stakeholders and state regulators to advance project improvements and ensure long-term environmental compliance
Corporate rebranding and transition from Excelsior Mining to Gunnison Copper, reinforcing a dedicated U.S. copper identity

Partnerships and Strategic Positioning

The Gunnison and Johnson Camp projects benefit from existing infrastructure including wells, processing facilities, road access, and grid power. Arizona’s mining-friendly jurisdiction, coupled with U.S. policy emphasis on secure domestic copper supply, provides Gunnison with a strong platform for partnerships and long-term market positioning. Collaboration with Rio Tinto’s Nuton initiative underscores the potential for technological innovation to enhance project outcomes.

Leadership and Capital Markets Strategy

Gunnison Copper is led by an experienced management team focused on financial discipline, technical execution, and stakeholder engagement. CFO Craig Hallworth brings strong financial and operational expertise, while IR lead Melissa Mackie adds depth in investor communications and outreach. The company trades publicly in Canada and the United States, providing investors exposure to a modern copper growth platform in a Tier 1 jurisdiction.

Near Term Catalysts

Expansion of ISR wellfields at the Gunnison Project
Ongoing copper cathode production ramp-up at Johnson Camp Mine
Results from Nuton technology testing and advancement of potential partnership structure
Updates on permitting amendments and community engagement initiatives
Continued balance sheet optimization and corporate growth initiatives

Conclusion

Gunnison Copper offers investors direct leverage to U.S. copper production and growth at a time of accelerating global demand. With production re-established at Johnson Camp Mine, optimization underway at the Gunnison ISR Project, and a strong platform for partnerships and technological innovation, the company is positioned to deliver both near-term cash flow and long-term value creation. Gunnison Copper represents a unique opportunity to participate in the reshaping of America’s copper supply chain from the heart of Arizona.

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For additional info or to schedule a call, feel free to reach out.

Jimmy Lederer

Vice President

Trinity Financing Investments Corporation

Phone: 347-514-0000

Email: jimmy@trinityfinancinginvestments.com

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