Copper One Resources Corp. Completes Third Drill Hole of 2026 Phase 2 Program at Majuba Hill Project

Vancouver, BC – November 13, 2026 – Leads & Copy – Copper One Resources Corp. has completed drill hole MHB-41, the third hole of its 2026 Phase 2 diamond drilling program at its Majuba Hill Copper-Silver-Gold Project in Pershing County, Nevada. The hole reached a final downhole depth of 1,850 feet (564 metres) and preliminary geological core logging identified pervasive silicification with fine-grained pyrite and chalcopyrite, tourmaline breccia at multiple depths, and fracture coatings of hematite and tenorite.

These observations offer additional geological information to support the Company’s ongoing evaluation of alteration and mineralization at Majuba Hill. MHB-41 was drilled on a grid azimuth of 075° at an inclination of −50°.

The core exhibited pervasive silicification with fine-grained pyrite and chalcopyrite from approximately 580–581 feet. Tourmaline breccia was observed within core-box intervals of 808.0–817.6 feet and 1,066.7–1,076.3 feet, characterized by angular, pale-coloured clasts within a dark matrix. At 1,261 feet (384 metres) downhole, core displayed fracture coatings of hematite and tenorite.

Holes MHB-39, MHB-40, and MHB-41 collectively account for 4,925 feet (1,501 metres) of completed diamond drilling in Phase 2 to date. All reported depths are downhole. The intervals cited for the tourmaline breccia photographs represent full core-box intervals and do not establish continuous mineralized widths. These mineral identifications are preliminary field observations and do not determine metal grades or establish economic mineralization, nor should they be considered a substitute for laboratory assay results.

Copper One is not reporting laboratory assay results from MHB-41 in this news release. Any material analytical results will be disclosed following receipt, quality assurance/quality control review, and evaluation by the Company's Qualified Person.

David Greenway, President and Chief Executive Officer of Copper One, stated that the completion of MHB-41 is an important step in the 2026 Phase 2 drilling program. He noted that the preliminary geological observations provide additional information as the technical team continues to evaluate the project's geological characteristics. Greenway emphasized that Majuba Hill remains central to the Company's North American copper exploration strategy, with a focus on systematic drilling, disciplined geological interpretation, and advancing the understanding of the mineralized system. Laboratory assays and further technical evaluation will be essential in determining the significance of these observations and guiding future exploration.

The expanded Phase 2 diamond core drilling program comprises up to 10,000 feet (3,048 metres) of HQ/PQ diamond core drilling. The program is intended to accelerate systematic testing of priority targets at Majuba Hill and support the Company’s objective of advancing the Project toward an inaugural mineral resource estimate prepared in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects. To date, more than 95,000 feet (28,956 metres) have been drilled at Majuba Hill across more than 100 drill holes.

The Phase 2 Program includes an initial drilling scope of approximately 5,000 feet (1,524 metres) contracted to Evolve, utilizing one portable HQ/PQ core drill. Continuous, two-shift drilling operations are planned 24 hours a day, seven days a week. The maximum planned hole depth under the initial scope is approximately 1,850 feet (564 metres), with final collar locations, azimuths, inclinations, and depths to be determined by the Company’s technical team. The program will feature real-time operational visibility through Evolve’s EVX Connect platform.

Copper One engaged Evolve Exploration Nevada, LLC (“Evolve”) to undertake the Phase 2 diamond core drilling. Evolve drill rigs operate on EVX Connect, Evolve’s real-time operational platform, through which Copper One expects to receive live drilling metrics, digital Progressive Logs of Drilling (PLOD), drill-hole coordinate tracking, streamlined invoicing, and high-quality photographs of drill core as it is recovered. Information will be accessible through web and mobile interfaces, providing the Company’s technical and management teams with timely visibility into drilling progress and field operations.

Majuba Hill is Copper One Resources Corp.’s flagship copper-silver-gold exploration project, located in Pershing County, Nevada, USA. Nevada ranked first globally on the Investment Attractiveness Index in the Fraser Institute’s Annual Survey of Mining Companies 2025. The property covers approximately 9,684 acres (3,919 hectares) and is situated approximately 70 miles (113 road kilometres) southwest of Winnemucca and 156 miles (251 kilometres) northeast of Reno. The project benefits from excellent infrastructure, including year-round road access, nearby electrical power and water, and access to a skilled mining workforce. Majuba Hill is a past-producing copper mine with an extensive exploration database, including records from historical and recent drilling programs, providing a strong technical foundation for ongoing exploration aimed at further defining the extent and economic potential of the mineralized system.

Exploration has outlined a large copper-silver-gold hydrothermal mineralized system that remains open for expansion. Current exploration is focused on advancing the Company's geological model through systematic drilling, geological mapping, geochemical sampling, and structural interpretation to evaluate the scale, continuity, and significance of mineralization. Additional drilling and technical studies will be required to further define the extent and economic potential of the mineralized system.

The Company maintains geological logging, core photography, and drill-record procedures for its Phase 2 drilling program at Majuba Hill. Mineral identifications reported for drill hole MHB-41 are based on preliminary visual field observations and geological interpretations. These observations do not establish metal grades, mineralized widths, or economic significance and should not be considered a substitute for laboratory assay results.

The scientific and technical information in this news release has been reviewed and approved by Larry Segerstrom, M.Sc. (Geology), CPG, a non-independent consulting geologist to the Company and a Qualified Person as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects.

Copper One Resources Corp. is focused on identifying, acquiring, and advancing high-potential copper, copper-silver-gold, and copper-molybdenum projects to help meet global demand for critical metals used in electrification, AI infrastructure and data centres, renewable energy, defence, and power system modernization. The Company's flagship asset is the Majuba Hill Copper-Silver-Gold District in Nevada. Copper One also owns a 100% interest in the Redonda Copper-Molybdenum Project in British Columbia, holds an option to earn up to a 100% interest in the Redhill Property in British Columbia, and owns a 100% interest in the Sport Project in Utah through its subsidiary, Rooinek Mining Corp.

Copper One is advancing its portfolio through systematic exploration, modern geological modelling, and disciplined technical evaluation, remaining committed to responsible exploration practices, technical transparency, and the disciplined advancement of critical-metals projects across North America. Stakeholders are encouraged to follow the Company on LinkedIn and X.com and subscribe for updates at https://copperone.com/.

Source: Copper One Resources Corp.