Arizona Sonoran Advances FS Drill Program and Updated Mineral Resource Modelling, Including Definition of a “Measured” Zone in the Parks/Salyer Starter Pit .bwlistdisc { list-style-type: disc } Arizona Sonoran Copper Company Inc. (TSX:ASCU | OTCQX:ASCUF) (“ASCU” or the “Company”) today announces the advancement of 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 “FS Drill Program”). The target of the updated model is to define Proven Mineral Reserves within the Pre-feasibility Study starter pit representing the first 2-2.5 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. See FIGURES 1-4 , TABLE 1 and TABLE 2 for drilling maps, assay results and collar locations, respectively. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260211655358/en/ George Ogilvie, Arizona Sonoran President and CEO 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% Total Copper (CuT), before an anticipated increase to 0.51% Total Copper in year three of the mine plan and an eventual estimated high of 1.03% 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% CuT over 483 ft (147 m) from 231 ft (70 m) depth (enriched) ECM-477 – 1.72% CuT over 93 ft (28 m) from 267 ft (109 m) depth (enriched) ECM-413 – 0.49% CuT over 269 ft (82 m) from 810 ft (247 m) depth (enriched) ECM-416 – 0.77% CuT over 185 ft (56 m) from 628 ft (191 m) depth (enriched) ECM-424 – 0.33% CuT over 406 ft (124 m) from 559 ft (171 m) depth (enriched) Geology and Drilling Recap The FS Drill Program is comprised of 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 Pre‑feasibility 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 Pre-feasibility 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% of the FS Drill Program completed to date, with results consistent with expectations. Overall, approximately 70% 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 re-start 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, AZ 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 #11758, who is independent of the