Announcement PDF 25 May 2026 Steve Zaninovich, Managing Director of Castle, commented: “The Meekasan acquisition brings with it a pipeline of high quality exploration targets supported by historical work and recent data compilation. We are excited to move quickly into the next phase of exploration across the expanded landholding at our Meeka South Gold Project, and look forward to providing shareholders an update on progress in due course.” Completion of Meekasan Acquisition Castle Minerals Limited (ASX: CDT) (“Castle” or “the Company”) refers to its announcement dated 3 March 2026 regarding the proposed acquisition of Meekasan Pty Ltd. Castle is pleased to advise that it has now completed the acquisition of 100% of the issued share capital of Meekasan Pty Ltd in accordance with the terms of the Share Purchase Agreement. The acquisition secures a significant package of exploration and prospecting tenements in the Meekatharra gold district, further strengthening Castle’s strategic landholding in this highly prospective and well-endowed gold region. The Meekasan tenure complements Castle’s existing projects in the region and provides a number of priority exploration targets, identified through historical work and recent data compilation. Castle looks forward to advancing exploration activities across the Meeka South Gold Project, with work programs to be progressed in the coming weeks. - END - This announcement was authorised for release to the ASX by the Board of Castle Minerals Limited. For further information please contact: Steve Zaninovich Managing Director enquiries@castleminerals.com Completion of Meekasan Acquisition ABOUT CASTLE MINERALS Castle Minerals Limited (ASX: CDT) is a gold exploration company with strategic tenure positions in Côte d’Ivoire, Ghana and Western Australia, encompassing some of the world’s premier gold producing regions. Castle’s projects are situated within the prolific West African Birimian gold belts, host to numerous multimillion-ounce gold deposits and operating mines across Côte d’Ivoire, Ghana and the broader region. In Côte d’Ivoire, Castle is under contract to acquire the Niellé Gold Project in the country’s highly prospective north, while also advancing the Mineralis Gold Project assets comprising seven permits (one granted and six in application) located along the Côte d’Ivoire–Ghana border. In Ghana, the Company holds the Kpali and Kandia Gold Projects in the Upper West Region, where exploration activities are focused on advancing multiple gold targets across fertile Birimian greenstone terranes. In Western Australia, Castle has established a dominant, contiguous ~184km2 landholding in the Murchison Gold District providing exposure to a proven gold province hosting multiple operating and past-producing mines. The Company’s Meeka South Gold Project boasts a strong infrastructure advantage located proximal to the Bluebird Gold Processing Mill (Westgold) and near Meeka Metals’ Murchison Gold Project, with geology comparable to established regional producers.