Announcement PDF 13 November 2025 Veteran Geologist & Mining Executive Andrew Grove Appointed to the Board HIGHLIGHTS • Veteran geologist and mining executive, Andrew Grove, to join the board of Castle as a non-executive director, bringing +35 years across exploration, development, operations and financing, with extensive experience across West Africa. • Former Managing Director & CEO of Chesser Resources (ASX:CHZ), where he advanced the Diamba Sud Gold Project, Senegal, culminating in its acquisition by Fortuna Silver Mines in 2023. • Former Group General Manager Business Development and Investor Relations of Perseus Mining (ASX/TSX:PRU) focusing on developing opportunities in Ghana and Côte d’Ivoire. • Most recently Managing Director & CEO of Aura Energy (ASX:AEE, AIM:AURA), advancing the Tiris Uranium Project, Mauritania. • 14 years as Division Director, Mining Finance & Risk Management at Macquarie Bank, financing numerous African mine developments. • Andrew holds a BEng (Minerals Exploration & Mining Geology) and a Masters degree in Mineral Economics, and currently serves as a Non‑Executive Director, Zenith Minerals (ASX:ZNC). • The appointment strengthens Castle’s focus across Ghana and Côte d’Ivoire, where the Company is advancing numerous gold opportunities. From Castle Executive Chairman, Steve Zaninovich: “Castle is delighted to welcome Andrew to the Board. Andrew’s, significant West African experience, geological understanding, project‑development know‑how and mine‑ finance discipline will be an asset for Castle’s ambitions and activities in its expanding footprint in Côte d’Ivoire and existing projects in Ghana. Notably, Andrew will strengthen the board’s technical oversight and decision‑making.” 13 November 2025 2 Castle Minerals Limited (“Castle”, “the Company”) (ASX:CDT) is pleased to announce the appointment of Mr Andrew Grove as Non-Executive Director effective immediately. Mr Grove is a geologist and mining executive with over three decades of extensive global industry experience across multiple commodities. He was most recently Managing Director & CEO of Aura Energy, stewarding progress at the Tiris Uranium Project in Mauritania. Previously Andrew served as Managing Director & CEO of Chesser Resources where he led the advancement of the Diamba Sud discovery in Senegal through to a successful corporate transaction, and served as Group General Manager Business Development and Investor Relations at Perseus Mining focusing on developing opportunities in Ghana, Côte d’Ivoire and throughout Africa. Earlier in his career he spent 14 years at Macquarie Bank in mining finance and held technical roles with Orano/Areva, Mines & Resources Australia and Acacia Resources. He holds BEng (Minerals Exploration & Mining Geology) from the WA School of Mines, a Master degree in Mineral Economics from Macquarie University, is a Member of the Australian Institute of Geoscientists, and is presently a Non-Executive Director of Zenith Minerals. This appointment supports Castle’s strategy to advance its Ghana assets and build optionality through its Côte d’Ivoire expansion program. From newly appointed Non-Executive Director, Andrew Grove: “I am delighted to join the board of Castle as the Company reviews its opportunities in Ghana and expands into Côte d’Ivoire, two of the best mining jurisdictions in West Africa, both underexplored with very significant discovery potential.” For further information please contact: Steven Zaninovich Chairman enquiries@castleminerals.com This announcementwas authorisedfor release to the ASX by the Board ofCastle Minerals Limited. - END - 13 November 2025 3 ABOUT CASTLE MINERALS Castle Minerals Limited (ASX: CDT) is a dedicated West African gold explorer with a commanding, 100 %-owned and extensive tenure position in northern Ghana and eastern Côte d’Ivoire, an emerging West African exploration frontier in one of the world’s premier gold regions. The Company recently contracted to earn interests in seven permits (one granted, six in application) along the Côte d’Ivoire–Ghana border. All projects are located on fertile Birimian greenstone belts, host to numerous multi-million-ounce gold mines across Ghana, Côte d’Ivoire and the broader West African region. Figure 1. Castle’s two Ghanaian gold projects and the seven permits in Côte d’Ivoire (Ebony permit granted, remaining permits in application).