Announcement PDF Western Mines Group Ltd www.westernmines.com.au Western Mines Group Ltd ACN 640 738 834 Unit 10, 448 Roberts Road Subiaco WA 6008 18 May 2026 ASX Announcement (ASX: WMG) ISSUE OF QUARTERLY WEBINAR SLIDES On 5 May 2026, Western Mines Group Ltd (“WMG” or “Company”) conducted a Quarterly Webinar through its InvestorHub. The Managing Director presented brief introductory slides containing previously released information and images from the Quarterly Report (ASX, March 2026 Quarterly Activities and Cashflow Reports, 30 April 2026) before taking Q&A. The Company has realised it did not issue the introductory slides to the ASX platform and attaches them to this notice. The Company, as at the date of this notice, has complied with ASX Listing Rule 3.1 and Section 674 and 674A of the Corporations Act. - END - This announcement has been authorised for release by the Board of Western Mines Group Ltd. For further information please contact: Dr Caedmon Marriott Managing Director Tel: +61 475 116 798 Email: contact@westernmines.com.au ASX: WMG www.westernmines.com.au @westernmines Western Mines Group WESTERN MINES GROUP SHAREHOLDER QUARTERLY WEBINAR MARCH 2026 TUESDAY 5 MAY ASX:WMG Western Mines Group Company Presentation, May 2026 DISCLAIMER 2 NATURE OF THIS DOCUMENT This presentation has been prepared by Western Mines Group Ltd ACN 640 738 834 (Company). The information is based on publicly available information, internally developed data and other sources. By receiving this presentation, you acknowledge and represent to the Company that you have read, understood and accepted the terms of this disclaimer. It is the responsibility of all recipients of this presentation to obtain all necessary approvals to receive this presentation and receipt of this presentation will be taken by the Company to constitute a representation and warranty that all relevant approvals have been obtained. This presentation is a visual aid and is not intended to be read as a stand-alone document. The material contains selected and abbreviated summary information about the Company and its activities current as at the date of this presentation. The material is of general background and does not purport to be complete. The Company is not responsible for providing updated information and assumes no responsibility to do so. NOT AN OFFER This presentation is for information purposes only and does not purport to be all inclusive or to contain all information about the Company or any of the assets, current or future, of the Company. This presentation does not comprise a prospectus, product disclosure statement or other offering document under Australian law (and will not be lodged with ASIC) or any other law. This presentation also does not constitute or form part of any invitation, offer for sale or subscription or any solicitation for any offer to buy or subscribe for any securities in any jurisdiction nor shall they or any part of them form the basis of or be relied upon in connection therewith or act as any inducement to enter into any contract or commitment with respect to securities. This presentation does not constitute an offer to sell, or a solicitation of an offer to buy, any securities in the United States. This presentation and its contents must not be distributed, transmitted or viewed by any person in the United States or any jurisdiction where the distribution, transmission or viewing of this document would be unlawful under the securities or other laws of that or any other jurisdiction. NOT INVESTMENT ADVICE To the maximum extend permitted by law, the information contained in this presentation is given without any liability whatsoever being accepted by the Company or any of its related bodies corporate or their respective directors, officers, partners, employees, advisors and agents. This presentation is not investment or financial product advice (nor tax, accounting or legal advice) and its contents are not intended to be used for the basis of making an investment decision. No representation or warranty, express or implied, is made as to the accuracy, completeness or thoroughness of the information, whether as to the past or future. Recipients of this presentation should carefully consider whether the company is an appropriate investment for them in light of their personal circumstances, including their financial and taxation position. This presentation does not take into account the individual investment objectives, financial situation and particular needs of each recipient of this presentation. Therefore, recipients of this presentation may wish to seek independent financial and taxation advice before making any decision in respect of this presentation. Neither the Company nor any of its related bodies corporate is licensed to provide financial product advice in respect of the Company’s securities or any other financial products. FORWARD LOOKING STATEMENTS Statements and material contained in this presentation, particularly those regarding possible or assumed future performance, production levels or rates, commodity prices, resources or potential growth of the Company, industry growth or other trend projects are, or may be, forward looking statements. Such statements relate to future events and expectations and, as such, involve known and unknown risks and uncertainties and are based on the assumptions, estimates, analysis and opinions of management made in light of its experience and its perception of trends, current conditions and expected developments, as well as other factors that management of the Company believes to be relevant. Although management believes that the assumptions made by the Company and the expectations represented by such information are reasonable, there can be no assurance that the forward-looking information will prove to be accurate. Forward-looking information involves known and unknown risks, uncertainties, and other factors which may cause the actual results, performance or achievements of the Company to be materially different from any anticipated future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, the actual market price of commodities, the actual results of current exploration, the actual results of future exploration, changes in project parameters as plans continue to be evaluated, as well as those factors disclosed in the Company's publicly filed documents. Readers should not place undue reliance on forward-looking information. The Company does not undertake to update any forward-looking information, except in accordance with applicable securities laws. DISCLAIMER No representation or warranty, express or implied, is made by the Company that the material contained in this presentation will be achieved or prove to be correct. Except for statutory liability which cannot be excluded, each of the Company, its directors, officers, employees, advisers and agents expressly disclaims any responsibility for the accuracy, fairness, sufficiency or completeness of the material contained in this presentation, or any opinions or beliefs contained in this presentation, and excludes all liability whatsoever (including in negligence) for any loss or damage which may be suffered by any person as a consequence of any information in this presentation or any error or omission there from. To the maximum extent permitted by the law, the Company disclaims any obligation to update or keep current the information contained in this presentation or to correct any inaccuracy or omission which may become apparent, or to furnish any person with any further information. Any opinions expressed in the presentation are subject to change without notice. COMPETENT PERSON STATEMENT The information in this announcement that relates to exploration results and the Mineral Resource Estimate for the Mulga Tank Project complies with the 2012 Edition of the Joint Ore Reserves Committee (JORC) Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code) and has been compiled and assessed under the supervision of Dr Caedmon Marriott, Managing Director of Western Mines Group Ltd. Caedmon is a member of the Australian Institute of Geoscientists and the Society of Economic Geologists. Caedmon has sufficient experience that is relevant to the styles of mineralisation and types of deposit under consideration, and to the activity being undertaken, 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’. Caedmon consents to the inclusion in this presentation of the matters based on his information in the form and context in which it appears. MONETARY VALUES Unless otherwise stated, all dollar values are in Australian Dollars (A$). The information in this presentation remains subject to change without notice. ASX:WMG 3 QUARTERLY ACTIVITIES REPORT MARCH 2026 Western Mines Group Company Presentation, May 2026 CONTINUED PROGRESS ON MULTIPLE FRONTS Ongoing exploration drilling at Mulga Tank during March quarter Ø Completion Phase 4 and commencing Phase 5 Ø Drilled MTRC009 (EIS9), MTRC068 to MTRC072 and MTD031 Ø Issues with road access and fuel hampered progress MTRC011 assay results Ø Repeating basal signature with two enriched horizons Ø Upper Zone 128m at 0.39% Ni from 490m inc. 36m at 0.50% Ni from 494m Ø Continuing tracing up-dip MTRC068, MTRC069 and MTRC071 assay results Ø Another high-grade intersection in MTRC069 of 27m at 0.61% Ni from 273m inc. 4m at 2.17% Ni from 289m with 1m at 4.35% Ni, 0.17% Co, 0.19% Cu, 0.29g/t Pt+Pd from 289m Magnesite supply MoU Ø Looking to commercialised the magnesite cap overburden transforming economics of project EIS grants Ø Received $250,000 EIS award for seismic survey ASX:WMG 4 DRILLING TO DATE AND PLANNED PHASE 5 Western Mines Group Company Presentation, May 2026 ASX:WMG 5 PHASE 5 HIGH-GRADE FOLLOW-UP Western Mines Group Company Presentation, May 2026 ASX:WMG 6 TWO HIGHLY PROSPECTIVE BASAL ZONES BEGINNING TO BE MAPPED CHASING BASAL ZONES UP DIP +100M AT +0.40% NI = STARTER PIT Western Mines Group Company Presentation, May 2026 ASX:WMG 7 MAGNESITE MOU Western Mines Group Company Presentation, May 2026 • Signed MoU with Magnium Australia to investigate supply of magnesite from Mulga Tank • Extensive magnesite cap formed above Mulga Tank high MgO dunite body • Semi-quantitative XRD shows up to 48% magnesite in OX zone • Potential feedstock for Magnium’s MagsonicTM process ASX:WMG 8 EIS GEOPHYSICS AWARD Western Mines Group Company Presentation, May 2026 • Won $250,000 EIS award for active seismic survey • 35km2 ~100 line km survey planned • Visualise the 3D architecture of the Complex and map basal contact • Target high-grade Perseverance-style deposits ASX:WMG 9 QUESTIONS Western Mines Group Company Presentation, May 2026 QUESTIONS?