Announcement PDF Castle Minerals Limited ASX Announcement 8 April 2025 Castle Appoints Brian Thomas as Non-Executive Director • Highly experienced corporate executive and geologist, Brian Thomas, appointed Non-Executive Director. • Career has spanned numerous multi-commodity Australian and international project and corporate assignments, including Ghana. • As former Chairman of Azure Minerals he played key role in its growth and eventual A$1.7 billion acquisition by SQM-Hancock. • Appointment comes as Castle finalises $3 million placement to fund exploration of its fertile and under-explored tenure in Ghana’s emerging Upper West Region. • RC drilling progressing at the Kpali Gold Project with results expected to be reported mid-May. • Drilling campaign at Kandia Gold Project scheduled to commence mid-May. Commenting on the appointment, Castle Executive Chairman, Stephen Stone said; “We are delighted that highly regarded mining executive, Brian Thomas, is to join the Castle board as a Non-Executive Director at a pivotal stage in its growth. His extensive experience in leadership roles across many facets of the corporate and financial sectors, combined with his strong geological expertise and project development background, will be invaluable as we accelerate progress on our flagship Ghanaian gold projects. Brian has been instrumental in the advance of numerous projects and companies, most recently as Chairman of Azure Minerals Limited where he played a key role in its $1.7 billion takeover by an SQM-Hancock partnership. His appointment comes as Castle finalises a $3.0 million placement to fund exploration of its very fertile and under-explored tenure in Ghana’s emerging Upper West Region, West Africa. Additionally, after six years of dedicated service, Non-executive Director James Guy has decided to retire from the board. We are really appreciative of his enormous contribution to the technical and corporate development of the Company, particularly his hands-on involvement in advancing our key projects. We wish him well." Principal and Registered Office Suite 9 / 11 Ventnor Ave, West Perth, WA 6005 | Postal PO Box 437 West Perth, WA 6872 Contact admin@castleminerals.com | www.castleminerals.com | Telephone +61 8 93227018 Castle Minerals Limited (ASX: CDT) Castle Appoints Brian Thomas as Non Executive Director Castle Minerals Limited (ASX: CDT) (“Castle”, the “Company”) advises the appointment mining executive, Mr. Brian Thomas, as Non-Executive Director, effective 8 April 2025. About Brian Thomas Mr. Thomas is a very experienced resource industry focused corporate executive with considerable Australian and international managerial and executive level experience. Commencing his career as an exploration and project development geologist with companies that included Western Mining Corporation and Geopeko Limited, he then progressed to executive roles in the corporate advisory, business development, stockbroking and investment banking sectors including with Westpac Banking Corporation, Merrill Lynch and Morgan Stockbroking. He has been actively involved with a wide range of commodities including precious, base metals, battery metals and industrial minerals across many jurisdictions including West Africa and specifically Ghana. Most recently he served as Chairman of Azure Minerals Ltd where he played a key role in its $1.7 billion acquisition by SQM-Hancock. He is currently: • Non-Executive Chairman and Creasy Group nominee at Peregrine Gold Limited (ASX: PGD); and • Non-Executive Director at Lanthanein Resources Limited (ASX: LNR) Mr. Thomas holds a BSc in Geology and Mineral Economics from the University of Adelaide, an MBA from the University of Western Australia, and a Graduate Certificate in Applied Finance & Investment from the Securities Institute of Australia. He is also a Member of the Australasian Institute of Mining and Metallurgy, the Australian Institute of Company Directors and the Financial Services Institute of Australasia. Non-Executive Director James Guy retiring Long-serving non-executive director, James Guy, has decided to retire and will be stepping down from the board after six years solid and unwavering contribution to the Company, effective 8 April 2025. Board Composition & Strategic Outlook Following these changes, Castle’s Board now comprises: • Stephen Stone – Executive Chairman • Matthew Horgan – Non-Executive Director • Brian Thomas – Non-Executive Director Upon completion of its $3 million placement and 30-to-1 capital consolidation (refer ASX 3 March 2025), Castle will be well-positioned to execute aggressive drilling programmes at its flagship Kpali and Kandia gold projects and at several other high conviction targets within its extensive tenure in Ghana’s Upper West region. Drilling underway Drilling at the Company’s flagship Kpali Gold Project is underway. The 2,500m, 22-hole RC drilling campaign will: • test for extensions to high grade zones at the Kpali and nearby Bundi prospects; • investigate possible distal mineralisation associated with the main host shear structure; and • evaluate artisanal miner workings that recently appeared 1.5km south of the Kpali prospect on the same north-south structural trend. Assay results are expected to be reported in mid-May 2025 (refer ASX 24 March 2025). A second drilling campaign is being designed to follow-up recent high grade intercepts obtained at the separate Kandia Gold Project. This is likely to commence early to mid-May 2025 subject to rig availability. Page 2 of 4 Castle Minerals Limited (ASX: CDT) Castle Appoints Brian Thomas as Non Executive Director Authorised for release to ASX by the Board of Castle Minerals Limited: Stephen Stone Executive Chairman stone@castleminerals.com +61 (0)418 804 564 COMPETENT PERSON COMPLIANCE STATEMENT The Company is not aware of any new information or data that materially affects the information included in the relevant historical market announcements referenced herein. ABOUT CASTLE MINERALS Castle Minerals Limited is an Australian Securities Exchange (ASX: CDT) listed and Perth, Western Australia headquartered company with interests in several projects in Ghana and Western Australia that are prospective for gold, graphite and base metals. In Ghana, West Africa, Castle’s 100% owned Ghanaian subsidiary, Carlie Mining Ltd, owns the Kpali Gold Project in the Upper West Region which comprises the Kpali, Kpali East and Bundi gold prospects. The Kandia Gold Project, is a separately located standalone discovery. All occur in highly prospective Birimian geological terrane, the host to many of West Africa’s and Ghana’s multi-million-ounce gold mines. The 100% owned Kambale Graphite Project is also located in Ghana’s Upper West Region. It is being progressed through technical and commercial evaluation for the production of battery grade material to be used in lithium-ion battery manufacture. Farm-outs or sales have been or are being sought for the Company’s West Australian projects: The Polelle Project, 7km southeast of the operating Bluebird gold mine near Meekatharra, hosts a mainly obscured and minimally explored greenstone belt prospective for gold and possibly base metals. The Wanganui Project is prospective for down-plunge high-grade gold shoots. Both have been optioned for purchase to Great Boulder Resources Limited (ASX: GBR) for possible incorporation into its emerging Side Well project. The Terra Rossa copper-zinc project is located on the western edge of the Earaheedy Basin. It is adjacent to the evolving World-Class Chinook-Magazine zinc-lead project of Rumble Resources Ltd (ASX: RTR). The Beasley Creek Project is prospective for gold and lithium and lies on the northern flanks of the Rocklea Dome in the southern Pilbara. OTHER COMPLIANCE STATEMENTS Competent Persons Statement – Kpali Gold Project Exploration Results The scientific and technical information in this announcement that relates to the geology of the deposits and exploration results is based on information compiled by Mr Stephen Stone, who is Executive Chairman of Castle Minerals Limited. Mr Stone is a Member of the Australian Institute of Mining and Metallurgy and has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Stone is the Qualified Person overseeing Castle’s exploration projects and has reviewed and consented to the disclosure of all scientific or technical information contained in this announcement that relates to the geology of the deposits and exploration. Page 3 of 4 Castle Minerals Limited (ASX: CDT) Castle Appoints Brian Thomas as Non Executive Director Cautionary Statement – Australian Projects All of Castle’s projects in Australia are considered to be of grass roots or of relatively early-stage exploration status. There has been insufficient exploration to define a Mineral Resource. No Competent Person has done sufficient work in accordance with JORC Code 2012 to conclusively determine or to estimate in what quantities gold or other minerals are present. It is possible that following further evaluation and/or exploration work that the confidence in the information used to identify areas of interest may be reduced when reported under JORC Code (2012). Forward Looking Statement Statements regarding Castle’s plans, forecasts and projections with respect to its mineral properties and programmes are forward-looking statements. There can be no assurance that Castle’s plans for development of its mineral properties will proceed. There can be no assurance that Castle will be able to confirm the presence of Mineral Resources or Ore Reserves, that any mineralisation will prove to be economic or that a mine will be successfully developed on any of Castle’s mineral properties. The performance of Castle may be influenced by a number of factors which are outside the control of the Company, its Directors, staff or contractors. Page 4 of 4