Mr. George Ogilvie reports

ARIZONA SONORAN ADVANCES FS DRILL PROGRAM AND UPDATED MINERAL RESOURCE MODELLING, INCLUDING DEFINITION OF A "MEASURED" ZONE IN THE PARKS/SALYER STARTER PIT

Arizona Sonoran Copper Company Inc. has advanced an updated mineral resource model on the Parks/Salyer deposit, reflecting partial results from the completed first phase of the planned feasibility study infill drilling program. The target of the updated model is to define proven mineral reserves within the prefeasibility study starter pit representing the first two to 2.5 years of planned copper cathode production. Based on returned drill assays and initial modelling to date, the company expects modelling results to be consistent with those reflected in the project's currently defined mineral resource and mineral reserve estimates in the same southern zone of Parks/Salyer. The mineral resource model will be further updated with additional infill drill holes at Parks/Salyer following condemnation drilling planned for Q1 2026.

George Ogilvie, Arizona Sonoran president and chief executive officer, commented: "The initial update to our internal model is demonstrating a high mineral resource conversion rate at the Cactus project with the tighter space drilling, providing a basis for the targeted declaration of proven mineral reserves within the Parks/Salyer starter pit to be defined in the upcoming feasibility study. As a result, we anticipate a further derisking of the project for potential project financiers in our continuing debt project financing process. Parks/Salyer grades in the starter pit are expected to remain consistent, at approximately 0.3 per cent total copper (CuT), before an anticipated increase to 0.51 per cent total copper in year three of the mine plan and an eventual estimated high of 1.03 per cent total copper in year 12 in the deeper higher-grade zones. Following the completion of the FS drill program and an updated mineral resource model for the pending feasibility study, we are eager to have the geology team transition to preparations for operational readiness later this year."

Parks/Salyer starter-pit drill highlights

• ECM-480 -- 0.55 per cent CuT over 483 feet (147 metres) from 231 ft (70 m) depth (enriched);
• ECM-477 -- 1.72 per cent CuT over 93 ft (28 m) from 267 ft (109 m) depth (enriched);
• ECM-413 -- 0.49 per cent CuT over 269 ft (82 m) from 810 ft (247 m) depth (enriched);
• ECM-416 -- 0.77 per cent CuT over 185 ft (56 m) from 628 ft (191 m) depth (enriched);
• ECM-424 -- 0.33 per cent CuT over 406 ft (124 m) from 559 ft (171 m) depth (enriched).

Geology and drilling recap

The FS drill program comprises approximately 92,000 ft (28,000 m) over the southern Parks/Salyer starter pit zone, at 125 ft (38 m) drill spacing. With tighter drill spacing, drilling is expected to upgrade the starter pit mineralized zone to the measured mineral resource category based on the mine plan phases as outlined in the prefeasibility study (see technical study). As such, drill holes terminate at predetermined depths to only target mineralization within the first two pit phases of the mine plan as contemplated in the prefeasibility study. Mineralized zones within which holes were terminated are planned for infill drilling at a later date from within the pit, in line with the eventual mine plan schedule defined by the feasibility study.

Drill assay results have been received from approximately 62 per cent of the FS drill program completed to date, with results consistent with expectations. Over all, approximately 70 per cent of the FS drill program has been completed, with the focus now on condemnation drilling. The remainder of the FS drill program is planned to restart upon completion of the condemnation drilling and will further support an updated mineral resource model, in addition to future production geology planning, for the pending feasibility study. Following the recommendations from the prefeasibility study, geotechnical and hydrogeological drilling for the feasibility study have also been initiated and are advancing as per schedule.

Quality assurance/quality control

Drilling completed between 2020 and 2026 was supervised by on-site Cactus project personnel who prepared core samples for assay and implemented a full QA/QC program using blanks, standards and duplicates to monitor analytical accuracy and precision. The samples were sealed on site and shipped to Skyline Laboratories in Tucson, Ariz., for analysis. Skyline's sample prep, analytical methodologies and quality control system complies with global certifications for quality ISO9001:2008.

The scientific and technical information in this press release has been reviewed and verified by Allan Schappert -- CPG No. 11758, who is independent of the company and a qualified person as defined by National Instrument 43-101 -- Standards of Disclosure for Mineral Projects of the Canadian Securities Administrators.

About Arizona Sonoran Copper Company Inc.

Arizona Sonoran is a copper exploration and development company with a 100-per-cent interest in the brownfield Cactus project. The project, on privately held land, contains a large-scale porphyry copper resource and a recent 2025 PFS proposes a generational open pit copper mine with robust economic returns. Cactus is a lower-risk copper developer benefitting from a state-led permitting process, in-place infrastructure, highways, and rail lines at its doorstep and on-site permitted water access. The company's objective is to develop Cactus and become a mid-tier copper producer with low operating costs, that could generate robust returns and provide a long-term sustainable and responsible operation for the community, investors and all stakeholders. The company is led by an executive management team and board, which have a long-standing record of successful project delivery in North America complemented by global capital markets expertise.

We seek Safe Harbor.