Welcome to our dedicated page for Gunnison Copper news (Ticker: GCUMF), a resource for investors and traders seeking the latest updates and insights on Gunnison Copper stock.
The news feed for Gunnison Copper Corp. (GCUMF) highlights the company’s evolution as a multi-asset copper developer and producer in the Southern Arizona Copper Belt. Recent announcements emphasize operational milestones at the Johnson Camp Mine, technical progress at the Gunnison Copper Project, district-scale exploration initiatives and key financing and corporate developments.
News releases describe Johnson Camp’s transition from care-and-maintenance to a fully operational mine, including first copper production and the first sales of pure copper cathode from southeast Arizona. Gunnison reports that Johnson Camp has a production capacity of up to 25 million pounds of finished copper cathode annually and that copper revenues from Johnson Camp initially accrue to Nuton LLC, a Rio Tinto venture, until Nuton has received payback of its funding for the asset.
Coverage also focuses on the deployment of Rio Tinto’s Nuton bioleaching technology at Johnson Camp and its role in producing 99.99% pure copper cathode at the mine gate without traditional concentrators, smelters and refineries. A collaboration between Nuton and Amazon Web Services is highlighted, under which AWS uses the first Nuton copper produced at Johnson Camp in components of its U.S. data centres and provides cloud-based data and analytics support to optimise Nuton’s technology.
Additional Gunnison Copper news includes updates on the Gunnison Project’s High-Value-Add Work Program, such as limestone evaluation for potential industrial by-products, preliminary economic impact findings from a University of Arizona study, a non-binding Letter of Intent with Lunasonde to test airborne subsurface imaging across the Cochise Mining District, balance sheet developments involving the Nebari credit facility, private placement financing plans, and corporate announcements regarding board and management changes.
Investors and observers can use this news stream to follow operational performance at Johnson Camp, technical and economic studies at the Gunnison Project, district-scale exploration partnerships and the company’s financing and corporate strategy.
Gunnison Copper (OTCQB: GCUMF) said Rio Tinto and Amazon Web Services will collaborate to bring the first Nuton™ copper produced at Gunnison's Johnson Camp mine into AWS U.S. data centers after a first industrial-scale deployment in December 2025. AWS will also provide cloud data and analytics to optimise Nuton's modular bioleaching system, which Produces 99.99% pure copper cathode at the mine gate and aims to avoid concentrators, smelters and refineries. The company says Nuton is projected to use substantially less water and have lower carbon emissions versus conventional processing and to recover value from material previously classed as waste.
Gunnison Copper (OTCQB: GCUMF) entered a Collaboration Framework Agreement with Lunasonde to deploy airborne Georadiotomography (aGRT) for an initial high-resolution subsurface survey over part of Gunnison's Cochise Mining District in southern Arizona.
The program includes test and calibration flights, data processing and 3D subsurface imaging of anomalies that may host critical minerals. Gunnison said results will be assessed with existing technical data to consider future use of aGRT.
Separately, Nebari converted US$500,000 of convertible principal at US$0.2097 per share, resulting in issuance of 2,384,358 common shares, reducing the Second ARCA principal and potentially enabling full repayment if proceeds from previously announced 48C tax credits are realized.
Gunnison Copper (OTCQB: GCUMF) announced that Rio Tinto's Nuton Technology produced first copper cathode at the Johnson Camp mine, marking the start of a four-year demonstration targeting approximately 30,000 tonnes of refined copper.
Nuton uses on-site microorganisms and modular bioreactors to leach primary sulphide ore, claiming up to 85% recovery, 80% less water use, and 60% lower carbon emissions versus conventional concentrator routes. Johnson Camp aims for a mine-to-metal carbon footprint of 0.82 kg CO2e/kg and 71 L/kg water intensity, supported by 134,000 Green-e renewable energy certificates.
Next steps include multi-year testing, independent third-party verification, and Rio Tinto internal review to validate long-term technical and environmental performance.
Gunnison Copper (OTCQB: GCUMF) announced on December 1, 2025 that it has fully repaid the US$7.3 million non-convertible principal portion of the Second Amended and Restated Credit Agreement (Second ARCA) with Nebari Natural Resources Credit Fund I LP.
Following the repayment, the only remaining balance under the Second ARCA is a $5.25 million convertible principal amount that Nebari retains the right to convert to equity under previously announced terms. Management said the repayment advances its goal of strengthening the balance sheet, improving financial flexibility, and moving toward fully retiring the remaining Nebari secured debt.
Gunnison Copper (OTCQB: GCUMF) announced the sudden passing of Director Colin Kinley on November 7, 2025. Colin had served on the Board since 2010 and was Chair of the Compensation Committee.
Board leaders described him as an internationally respected explorationist and mining subject matter expert whose contributions and friendship will be greatly missed. The company said Colin's seat will remain vacant until a new director is proposed and confirmed at the next annual shareholders meeting.
Gunnison Copper (OTCQB: GCUMF) reported that a limestone evaluation from historical drill holes found ~96% of 883 ft of analyzed core meets indicative thresholds for cement and agricultural lime, averaging >96% calcite and >55% CaO. About 21% met thresholds for premium paper filler/paint applications (avg >97% calcite, ~56% CaO).
The company notes ~224 million tons of limestone are scheduled as waste over a 16-year mine life and intends to expand testing and incorporate results into an updated PEA in Q1 2026 with PFS work ongoing.
Gunnison Copper (TSX: GCU; OTCQB: GCUMF) announced a non-brokered private placement to raise up to C$15.0 million by issuing up to 33,333,333 Units at C$0.45 per Unit. Each Unit includes one common share and one-half warrant; each full warrant is exercisable at C$0.65 for 36 months. Net proceeds are allocated to drilling, metallurgical testing, permitting for a pre-feasibility study, US head office G&A, partial repayment of debt to Nebari, and working capital. Closings are expected on or around October 29, 2025, subject to TSX and regulatory approvals. Up to 24,858,878 Units will be offered as "LIFE Units" and are expected to be immediately freely tradeable in Canada; remaining Units are subject to a four-month hold in Canada.
Gunnison Copper (OTCQB: GCUMF, TSX: GCU) promoted Robert Winton to Chief Operating Officer effective October 9, 2025. Winton, with more than 25 years of mining experience, guided the Johnson Camp Mine restart from care-and-maintenance to first copper production and commercial sales in 2025.
As COO he will oversee site operations, project development, and upcoming work programs, and continue coordination with Nuton LLC (a Rio Tinto venture) where first copper via advanced bio-leaching is expected later in 2025. The promotion follows Johnson Camp reaching production within one year of breaking ground.
Gunnison Copper (OTCQB: GCUMF) released preliminary results of a University of Arizona economic impact study dated October 8, 2025, estimating a $14.6 billion cumulative present‑value output across the U.S. over the life of the Gunnison Project. The study forecasts 53,521 job‑years and $2.07 billion in labor income nationally, with $10.01 billion output in Arizona and $9.02 billion in District 6 (including Cochise County).
The release notes average annual direct revenue of $625 million and combined national annual output of $1.43 billion. The company cautions these are forecasted impacts contingent on feasibility, financing and permitting. The company also announced an initial $500,000 Nebari conversion at US$0.2097, issuing 2,384,358 common shares and reducing the Second ARCA principal.
Gunnison Copper Corp. (OTCQB: GCUMF) has achieved a significant milestone with its first copper sales from the Johnson Camp Mine (JCM) in Arizona. The company sold 225,371 pounds of copper cathode at US$4.64 per pound, generating gross proceeds of US$1,046,194.
The mine, which began production in late August 2025, has a nameplate capacity of 25 million pounds of copper cathode annually. The facility will implement Nuton's bio-leaching technology later this year, marking the first large-scale deployment of this innovative Rio Tinto venture. JCM's production contributes to domestic supply chains, supporting American energy independence and manufacturing sectors.
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