Gunnison Copper Stock Price, News & Analysis

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.

Gunnison Copper (OTCQB: GCUMF) has signed a non-binding Letter of Intent with Lunasonde Inc., a defense technology start-up, to test innovative airborne subsurface imaging technology for mineral exploration. The partnership will focus on exploring Gunnison's district-scale land package in southeastern Arizona's Cochise Mining District for copper, critical minerals, and rare earth elements.

The collaboration aims to leverage Lunasonde's experimental Airborne Georadiotomography (aGRT) technology to identify new mineral targets beneath thick alluvial cover. The parties plan to seek funding through the U.S. Department of Energy's ROCKS Program. The district is known to potentially host at least 12 critical minerals important to the US supply chain.