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Vancouver, BC – July 21, 2026 - TheNewswire – Copper One Resources Corp. (“Copper One”) (CSE: CEXY | OTCID: CEXYF | FSE: IW8 | WKN: A42AGR) (the “ Company ”) is pleased to announce the mobilization of its fully funded 2026 diamond drill program at its 100%-owned Redonda Copper-Molybdenum Project  ( “Redonda” or the  “Property ”)  located on West Redonda Island, in the Vancouver Mining Division of British Columbia.

Redonda hosts a large, underexplored porphyry copper-molybdenum system within British Columbia's Coast Suture Zone, a prolific geological belt known for significant porphyry copper deposits. Building upon historical drilling, trenching, airborne geophysical surveys, and recent field mapping, the fully funded 2026 drill program has been designed to target the southern extension of the known mineralized system and further define its geometry and continuity.

The Company has finalized drill planning and logistics, with four initial drill sites now surveyed and marked in preparation for drilling. The 2026 program is designed to complete approximately 2,400 metres (7,874 Feet) of fully funded diamond drilling , with the potential for additional drill holes depending on results.

To execute the 2026 drill program, Copper One has engaged Paradigm Drilling Ltd. ( "Paradigm Drilling" ), which will deploy a Boyles T-75 hydraulic, track-mounted diamond drill equipped with NQ tooling and capable of testing targets to depths exceeding 600 metres (1,969 feet). The drill rig is scheduled to be transported to the project on the July 28 th  marine barge, with arrival at Redonda Bay expected on July 31 st , and drilling is expected to commence immediately upon mobilization.

The 2026 exploration strategy is based on the Technical Report on the Redonda Property prepared by W.B. Lennan, P.Geo. Mr. Lennan has reviewed the planned drill program and concurs with its objectives, drill targets, and design.
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Figure 1 : Location of the Planned 2026 Drill Sites at the Redonda Copper-Molybdenum Project, West Redonda Island, British Columbia.

The Redonda Copper-Molybdenum Project comprises nine mineral claims covering approximately 2,746 hectares (6,786 acres) on West Redonda Island in British Columbia's Vancouver Mining Division. The property hosts a large porphyry copper-molybdenum system that has been explored intermittently since the late 1960s through geological mapping, geochemical sampling, geophysical surveys, trenching and diamond drilling. Historical exploration by Teck Resources Ltd. (formerly Teck Corp.) in 1979 included nine NQ diamond drill holes totaling 1,681 metres (5,515 feet), while subsequent operators completed additional drilling, trenching and airborne geophysical surveys that further advanced the understanding of the mineralized system. Historical exploration has identified multiple copper and molybdenum mineralized zones that remain open along strike and at depth, providing the basis for the 2026 drill program. The Company's NI 43-101 Technical Report, filed in March 2026, incorporates historical exploration data, recent drilling results and updated geophysical information that have been used in planning the 2026 drill program.

Figure 2 : Molybdenite (MoS₂) observed in tourmaline-breccia drill core from the 2025 Redonda drill program .

The 2026 drill program has been designed to build upon the extensive historical exploration completed on the property, including previous diamond drilling, trenching and airborne geophysical surveys. The program will test the southern extension of the known copper-molybdenum mineralized system while refining the orientation, geometry and continuity of the porphyry-related mineralization. The Company believes these targets represent a logical next step in evaluating the property's district-scale exploration potential.

The primary objectives of the 2026 drill campaign include:

• Complete approximately 2,400 metres (7,874 feet) of diamond drilling.  

• Test four initial drill platforms, with flexibility to add additional holes where warranted.  

• Follow the known copper-molybdenum mineralization to the south using integrated airborne geophysical data, historical trenching and previous shallow drilling.  

• Expand the currently recognized strike length of the mineralized system to more than one kilometre (0.62 mile) .  

• Better define the orientation, geometry and continuity of the mineralized system to support future step-out drilling .  

Figure 3 : Reduced-to-Pole Airborne Magnetic Survey Showing Historical Drill Collars and Planned 2026 Drill Sites at the Redonda Project.

Particular emphasis will be placed on the southern extension of the system, where recent field observations have identified what may represent a previously unrecognized mineralized zone exposed along a historic logging road east of the main trend. This newly exposed mineralized zone will be systematically mapped and sampled during the field program and may become an additional drill target, subject to analytical results.

To support the program, Copper One has engaged experienced porphyry copper geologist B. Augsten, P.Geo., who will oversee the majority of geological logging during the campaign.

2025 Exploration Program

During the 2025 exploration program, Copper One completed diamond drilling, geological mapping, and surface sampling that further confirmed the presence of porphyry-style copper-molybdenum mineralization associated with tourmaline breccias and intrusive rocks. The program, together with historical drilling, trenching, and airborne geophysical surveys, enhanced the Company's understanding of the geometry and controls of the mineralized system and provided the technical basis for planning the 2026 drill campaign.

The 2026 program has been designed to follow up on these results by testing the southern extension of the known mineralized system, refining its orientation and continuity, and evaluating newly identified targets generated through the integration of historical exploration, recent drilling, field mapping, and geophysical data.

David Greenway, Chief Executive Officer of Copper One Resources, commented: "With Majuba Hill advancing in Nevada, Redonda represents another important growth opportunity within our portfolio of copper assets. The logistics are now in place, and our technical team has designed a focused drill program to extend the known copper-molybdenum system while improving our understanding of its geometry and continuity. Historical drilling, geophysical data, and recent field observations all suggest there is significant potential to expand the mineralized footprint. With drilling scheduled to commence immediately following mobilization at the end of July, we look forward to testing the southern extension of the system and continuing to build long-term value for our shareholders."

Klahoose First Nation

The Company further announces that it has made it a priority to work in close collaboration with the Klahoose First Nation ( "Klahoose" ) throughout the 2026 exploration campaign. Copper One is committed to prioritizing local employment, training opportunities, and the engagement of Klahoose-owned and affiliated businesses wherever practicable. As part of this commitment, the Company has engaged a Klahoose member to perform core splitting and will utilize the Klahoose crew boat for marine transportation during the program.

Throughout the campaign, the Company will maintain ongoing engagement with Klahoose through regular communication on exploration activities, work schedules, and project milestones, while incorporating community feedback into field operations where appropriate. All exploration activities will be conducted in accordance with cultural heritage protocols, environmental best practices, and the Company's commitment to responsible mineral exploration within Klahoose Traditional Territory.

The Company will continue to coordinate site access, health and safety, and environmental monitoring in collaboration with Klahoose representatives and explore additional opportunities to support long-term capacity building, skills development, and meaningful economic participation as exploration advances.

Efficient Field Operations

The program will also benefit from the use of a nearby 40-person floating logging camp, eliminating the need to establish a dedicated exploration camp and significantly improving operational efficiency while reducing mobilization costs and logistical complexity. The exploration program was designed in consultation with W.B. Lennan, P.Geo.

About Redonda

The Redonda Copper-Molybdenum Project is a district-scale porphyry copper-molybdenum exploration project located on West Redonda Island in British Columbia's Vancouver Mining Division. The project comprises nine mineral claims covering approximately 2,746 hectares (6,786 acres) and is situated within the highly prospective Coast Suture Zone, a geological belt known for significant porphyry copper and skarn mineralization.

Redonda lies within the Coast Suture Zone between the Wrangellia Terrane and the Coast Plutonic Complex. Early Cretaceous dioritic intrusions of the Coast Plutonic Complex are cut by at least three later intrusive phases: (i) a quartz plug; (ii) a wide, hornblende-rich dike locally brecciated over approximately 600 metres (1,969 feet) of exposed length; and (iii) several smaller feldspar dikes near the southwestern margin of the hornblende body. Copper-molybdenum mineralization is most concentrated along the hornblende dike, particularly within brecciated zones. The geological setting shares several characteristics with nearby porphyry systems, including the OKover copper-molybdenum deposit located approximately 34 km (21 miles) to the southeast (north of Powell River) and the Gambier Copper deposit in Howe Sound.

Qualified Person

The scientific and technical information contained 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.

About Copper One Resources Corp.

Copper One Resources Corp. is focused on identifying, acquiring, and advancing high-potential copper, copper-silver-gold, and copper-molybdenum projects to help meet the growing global demand for critical metals required for electrification, AI infrastructure and data centres, renewable energy, defence, and the modernization of power systems.

The Company’s flagship asset is the Majuba Hill Copper-Silver-Gold District, located approximately 156 miles (251 kilometres) from Reno, Nevada. Majuba Hill is an exploration-stage porphyry copper project situated in a premier mining jurisdiction with excellent infrastructure, where ongoing exploration is focused on evaluating the scale and continuity of a large copper-silver-gold mineralized system.

Copper One also owns a 100% interest in the Redonda Copper-Molybdenum Project, located northeast of Campbell River in British Columbia’s Vancouver Mining Division. The district-scale project comprises approximately 2,746.46 hectares (6,786 acres) across nine mineral claims and hosts a porphyry-style copper-molybdenum system within the highly prospective Coast Suture Zone, a geological belt known for significant porphyry copper and skarn mineralization. The Company believes Redonda has the potential to become a significant long-term exploration asset as systematic exploration continues to evaluate the scale and continuity of the mineralized system.

In addition, Copper One holds an option to earn up to a 100% interest in the Redhill Property, located south of Ashcroft, British Columbia, adjacent to the Trans-Canada Highway. The 4,736-hectare (11,704-acre) property hosts volcanogenic massive sulphide (VMS) mineralization prospective for copper, zinc, silver and gold, while also demonstrating potential for epithermal gold mineralization.

Subject to completion of the Proposed Transaction, Copper One will also own the Sport Project in Utah, expanding the Company's portfolio of North American copper exploration assets.

Copper One is advancing its portfolio through systematic exploration, modern geological modelling, and disciplined technical evaluation. The Company remains committed to responsible exploration practices, technical transparency, and creating long-term shareholder value through disciplined exploration and the advancement of critical metals projects across North America.

All stakeholders are encouraged to follow the Company on its social media profiles on  LinkedIn  and  X.com , and to subscribe for updates at  https://copperone.com/ .

Neither the Canadian Securities Exchange nor its Market Regulator (as that term is defined in the policies of the Canadian Securities Exchange) accepts responsibility for the adequacy or accuracy of this release.

On Behalf of the Copper One Resources Corp. Board of Directors:

“David Greenway"  David C. Greenway

President & CEO

For further information, please contact:

Brent Rusin

Corporate Communications

E: info@copperone.com

P: 1 (236) 788-0643

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www.copperone.com

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Forward-Looking Information

This news release contains certain forward-looking statements and forward-looking information (collectively, “Forward-Looking Statements”) within the meaning of applicable Canadian securities laws. Forward-Looking Statements are frequently identified by such words as “anticipates,” “believes,” “expects,” “intends,” “plans,” “projects,” “targets,” “may,” “will,” or similar expressions.

Forward-Looking Statements in this news release include, but are not limited to, statements regarding the Company’s plans and objectives, including its strategy to enhance market awareness, expand its shareholder base, and advance its mineral projects.

These Forward-Looking Statements are based on reasonable assumptions and estimates of management at the date of this news release, including, without limitation, that the Company will be able to execute its business plans as currently contemplated, that general market conditions will remain stable, and that the Company will have access to sufficient capital to support its activities.

Forward-Looking Statements involve known and unknown risks, uncertainties, and other factors which may cause the actual results, performance, or achievements of the Company to differ materially from any future results, performance, or achievements expressed or implied by such Forward-Looking Statements. Such factors include, among others, risks related to general market and economic conditions, fluctuations in commodity prices, including copper, risks inherent in mineral exploration and development, the Company’s ability to obtain financing on acceptable terms or at all, and changes in applicable laws and regulations. Additional risk factors are discussed in the Company’s continuous disclosure filings available under the Company’s profile on SEDAR+ at www.sedarplus.ca .

Although the Company has attempted to identify important factors that could cause actual actions, events, or results to differ materially from those described in Forward-Looking Statements, there may be other factors that cause actions, events, or results not to be as anticipated, estimated, or intended. Accordingly, readers should not place undue reliance on Forward-Looking Statements. The Company undertakes no obligation to update any Forward-Looking Statements except in accordance with applicable securities laws.

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