ATEX Completes Phase V Program Ending in High-Grade B2B Mineralization - Strategic Objectives Achieved with Resource Update Expected in 2H 2025

About this update from Anterix Inc.

Phase VI to Target New High-Grade Breccia and Regional Targets Toronto, Ontario--(Newsfile Corp. - July 30, 2025) - ATEX Resources Inc. ( TSXV: ATX ) (" ATEX " or the " Company ") is pleased to announce assay results for ATXD25C, ATXD27B and ATXD28, representing the final three drill holes in the Phase V drill program, concluding the most successful campaign at the Valeriano Copper-Gold Project (" Valeriano " or the " Project "), located in the Atacama Region, Chile. ATEX plans to begin its Phase VI drill program as early as September with more details to be provided closer to program commencement. "The results from our Phase V drill program represent the best we've ever seen at Valeriano, delivering exceptional copper and gold grades and confirming the scale and continuity of the system," Ben Pullinger, President and CEO, commented. "These results not only validate and improve our geological model but also set a strong foundation for the upcoming Phase VI program, which is currently in progress with an expected start in September allowing for an extended drill season and increased metres completion. A key priority will be defining the geometry and understanding the structural controls of the high-grade breccias, while also stepping out to test new, high-potential targets supported by our evolving geological model. We plan to release an updated Mineral Resource Estimate later this year which will encompass drilling from Phase IV (totaling ~12,000m) and Phase V (totaling ~16,600m) which delivered stronger results than the previous drill campaigns. The update will also incorporate improved metallurgical recoveries as outlined in our second metallurgical program i . ATEX is well positioned to build on the Phase V momentum and unlock further upside as we continue to advance and de-risk the project." Highlights include: Phase V Achieves Stated Objectives: Outlook - Phase VI Drill Program to Commence Shortly with Updated MRE in 2H 2025 Figure 1. 2023 Geological Model supporting MRE vs. End of Phase V Model To view an enhanced version of this graphic, please visit: https://images.newsfilecorp.com/files/6303/260612_12910038e4383a76_001full.jpg Figure 2. Plan Map of High-Grade Porphyry Trend, B2B Breccia & Phase VI Targets To view an enhanced version of this graphic, please visit: https://images.newsfilecorp.com/files/6303/260612_12910038e4383a76_002full.jpg Table 1 - Summary Results for ATXD25C & ATXD27B and ATXD28A   Phase V Drill Results - Final Three Assays A discussion of holes ATXD27B, ATXD25C, and ATXD28A is provided below along with an overview of completed drill holes, as well as those being drilled up until the Phase V demobilization. B2B Zone Exploration Valeriano Porphyry Exploration Phase V - The Largest and Most Successful Exploration Program at Valeriano to Date The Program completed approximately 16,600 metres of directional diamond drilling compared to approximately 12,000m achieved in Phase IV, an increase of about 4,600m. Using directional drilling techniques, ATEX has saved approximately 9,200m of drilling compared to conventional drilling methods enhancing the overall effectiveness of the program. The recently completed drill program deployed five rigs, an increase from the three utilized during Phase IV. Phase V confirmed and significantly expanded the high-grade B2B Zone, which was previously identified from a single intercept in the final hole of Phase IV. The B2B Zone now extends over a strike length of roughly 500m and has been delineated approximately 200m closer to surface, with its upper contact positioned at a depth of 400m below the valley floor. Additionally, the high-grade porphyry trend, defined by intervals grading greater than 0.8% CuEq within the Valeriano Porphyry, was extended by more than 200m and now spans approximately one kilometre in length. This mineralized corridor remains open along strike to the north-northwest and southeast. Nine holes were completed in Phase V (ATXD16B, 22C, 23A, 23B, 25A, 25B, 27A, 28, and 28A) and four partial holes (ATXD22D, 25C, 27B, and 29A) will be completed as part of the Phase VI program. ATEX's exploration objectives for Phase V were focused on three priorities: The Phase V drill campaign yielded the most significant intercepts in ATEX's exploration history, providing a robust foundation for targeted follow-up drilling in the upcoming Phase VI program. Standout drill holes included the following (additional details provided in Table 2): Table 2 - Detailed Results with Metallurgical Recoveries for all Phase V Drill Holes   Table 3 - Phase V Drill Hole Summary   Outlook - Phase VI Planning Underway Following the record setting results achieved in Phase V on the Valeriano Project, Phase VI is anticipated to commence in September. This program will aim to focus on further delineation and growth of the high-grade B2B Zone; explore for and test other high-grade breccia targets to the north, and new regional targets; continue expanding the Valeriano Porphyry system where system limits are still unknown; and continue project derisking through ongoing baseline environmental studies and monitoring, early stage engineering studies, including hydrogeology and geotechnical scopes and advancing permitting for future drill campaigns (see Figure 1). Additional information will be provided closer to commencement of the drilling campaign. Quality Control & Quality Assurance Drill holes are collared with a PQ drill bit, reduced to HQ and, sequentially, to NQ as the drill holes progressed deeper. Drill core produced by the drill rigs was extracted from the core tubes by the drill contractor under the supervision of ATEX employees, marked for consistent orientation and placed in core boxes with appropriate depth markers added. Full core boxes were then sealed before being transported by ATEX personnel to the Valeriano field camp. Core at the field camp is processed, quick logged, checked for recovery, photographed, and marked for specific gravity, geotechnical studies and for assays. From camp, the core is transferred to a secure core-cutting facility in Vallenar, operated by IMG, a third-party consultant. Here, the core trays are weighed before being cut using a diamond saw under ATEX personnel oversight. ATEX geologists working at this facility double-check the selected two-metre sample intervals, placing the samples in seal bags and ensuring that the same side of the core is consistently sampled. Reference numbers are assigned to each sample and each sample is weighed. The core trays with the remaining half-core are weighed and photographed. Additionally, core logs are updated, and specific gravity and geotechnical samples are collected. The remaining core is stored in racks at the Company's secure facility in Vallenar. From Vallenar samples are sent to an ALS preparation facility in Copiapo. ALS is an accredited laboratory which is independent of the Company. The prepared samples were sent to the ALS assay laboratories in either Santiago, Chile and Lima, Peru for gold (Au-AA24), copper (Cu-AA62), molybdenum (Mo-AA62) and silver (Ag-AA62) assays as well as and multi-element ICP (ME-MS61) analysis. No data quality problems were indicated by the QA/QC program. Qualified Person Mr. Ben Pullinger, P.Geo., registered with the Professional Geoscientists Ontario, is the Qualified Person, as defined by National Instrument 43-101 - Standards for Disclosure for Mineral Projects, for the Valeriano Copper Gold Porphyry Project. Mr. Pullinger is not considered independent under NI 43-101 as he is President and CEO of ATEX. He has reviewed and approved the disclosure of the scientific and technical information contained in this press release. About ATEX ATEX is exploring the Valeriano Copper-Gold Project which is located within the emerging copper gold porphyry mineral belt linking the prolific El Indio High-Sulphidation Belt to the south with the Maricunga Gold Porphyry Belt to the north, located in the Atacama Region, Chile. This emerging belt, informally referred to as the Link Belt, hosts several copper gold porphyry deposits at various stages of development including, Filo del Sol (Lundin Mining/BHP), Josemaria (Lundin Mining/BHP), Lunahausi (NGEx Minerals), La Fortuna (Teck Resources/Newmont) and El Encierro (Antofagasta/Barrick). The Valeriano Project hosts a large copper gold porphyry mineral resource: 1.41 billion inferred tonnes at 0.67% CuEq (0.50% Cu, 0.20 g/t Au, 0.96 g/t Ag and 63.80 g/t Mo), which includes a higher-grade core totaling 200 million tonnes at 0.84% CuEq (0.62% Cu, 0.29 g/t Au 1.25 g/t Ag and 55.7 g/t Mo), as reported by ATEX on September 12, 2023 iii . For further information, please contact: Ben Pullinger, President and CEO Email: [email protected] Aman Atwal, Vice President, Business Development and Investor Relations Email: [email protected] 1-647-398-9405 or visit ATEX's website at www.atexresources.com . CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS: This news release contains forward-looking statements, including predictions, projections, and forecasts. Often, but not always, forward-looking statements can be identified by the use of words such as "plans", "planning", "expects" or "does not expect", "continues", "scheduled", "estimates", "forecasts", "intends", "potential", "anticipates", "does not anticipate", or describes a "goal", or variation of such words and phrases or state that certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved. Forward-looking statements involve known and unknown risks, future events, conditions, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from any future results, prediction, projection, forecast, performance or achievements expressed or implied by the forward-looking statements. Such forward-looking statements include, among others: statements regarding plans for the evaluation of exploration properties including the Valeriano Copper Gold Project; the success of evaluation plans; the success of exploration activities especially to the significant expansion of the high-grade corridor; mine development prospects; potential for future metals production; changes in economic parameters and assumptions; all aspects related to the timing and extent of exploration activities, including the Phase V and Phase VI programs contemplated in this press release; timing of receipt of exploration results; the interpretation and actual results of current exploration activities and mineralization; changes in project parameters as plans continue to be refined; the results of regulatory and permitting processes; future metals price; possible variations in grade or recovery rates; failure of equipment or processes to operate as anticipated; labour disputes and other risks of the mining industry; the results of economic and technical studies; delays in obtaining governmental and local approvals or financing or in the completion of exploration; timing of assay results; as well as those factors disclosed in ATEX's publicly filed documents. Although ATEX 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. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements. Neither the TSX Venture Exchange nor its regulation services provider has reviewed or accepts responsibility for the adequacy or accuracy of the content of this news release. ________________________ i See news release titled: "ATEX Announces Results of Second Metallurgical Program Further Demonstrating Outstanding Recoveries for Copper and Gold at Valeriano, Phase V Drill Program Underway with Fourth Rig Being Mobilized" reported on December 11, 2024. ii See news release dated May 15, 2024, titled "ATEX Discovers New High-Grade Mineralization at Valeriano Intersecting 68 Metres of 2.02% CuEq Within a Broader Intercept of 356 Metres of 0.98% CuEq". iii See NI 43-101 technical report titled "Independent Technical Report for the Valeriano Copper-Gold Project, Atacama Region, Chile" by Joled Nur, CCCRRM-Chile, and David Hopper, CGeol, with an effective date of September 1, 2023, filed at www.sedarplus.ca on October 25, 2023, for additional details on the 2023 Mineral Resource Estimate for the Valeriano project. To view the source version of this press release, please visit https://www.newsfilecorp.com/release/260612

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