Announcement PDF ASX: RMX investorhub.redmountainmining.com.au info@redmountainmining.com.au Red Mountain Mining Ltd ACN 119 568 106 ASX ANNOUNCEMENT 28 September 2026 CHANGE OF DIRECTORS’ INTEREST NOTICE Red Mountain Mining Limited advises that the attached Appendix 3Y relates to the lapse of RMXOK options held by a Director of the Company. Due to an administrative oversight, the Appendix 3Y was not lodged within five business days of the lapse of the RMXOK options, as required by ASX Listing Rule 3.19A. The Company confirms that formal arrangements are in place with each Director, as contemplated by ASX Listing Rule 3.19B, requiring Directors to notify the Company of any changes to their notifiable interests within the timeframes necessary to enable the Company to comply with ASX Listing Rule 3.19A. These requirements are also reflected in the Company’s Securities Trading Policy. The Company considers that its existing arrangements are adequate to ensure future compliance with ASX Listing Rules 3.19A and 3.19B and that the late lodgement on this occasion was an isolated administrative oversight. Authorised by the Board, Mauro Piccini Company Secretary JOIN THE RED MOUNTAIN MINING INVESTOR HUB Visit https://investorhub.redmountainmining.com.au for access to the Investor Hub 2 Appendix 3Y Change of Director’s Interest Notice + See chapter 19 for defined terms. 01/01/2011 Appendix 3Y Page 1 Rule 3.19A.2 Appendix 3Y Change of Director’s Interest Notice Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX’s property and may be made public. Introduced 30/09/01 Amended 01/01/11 Name of entity Red Mountain Mining Ltd ABN 40 119 568 106 We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act. Name of Director Robert Norman Parton Date of last notice 10 February 2025 Part 1 - Change of director’s relevant interests in securities In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust Note: In the case of a company, interests which come within paragraph (i) of the definition of “notifiable interest of a director” should be disclosed in this part. Direct or indirect interest Indirect Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest. The securities are held by TPG Australasia Pty Ltd. Mr Parton is a of director TPG Australasia Pty Ltd. Date of change 14 September 2026 No. of securities held prior to change Indirect • 300,000 RMXOK Quoted options ($0.08, expiring 14 September 2026) Class Quoted options ($0.08, expiring 14 September 2026) Number acquired Nil Number disposed 300,000 Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation Nil Appendix 3Y Change of Director’s Interest Notice + See chapter 19 for defined terms. Appendix 3Y Page 2 01/01/2011 No. of securities held after change Nil Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back options lapsed Part 2 – Change of director’s interests in contracts Note: In the case of a company, interests which come within paragraph (ii) of the definition of “notifiable interest of a director” should be disclosed in this part. Detail of contract N/A Nature of interest N/A Name of registered holder (if issued securities) N/A Date of change N/A No. and class of securities to which interest related prior to change Note: Details are only required for a contract in relation to which the interest has changed N/A Interest acquired N/A Interest disposed N/A Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation N/A Interest after change N/A Part 3 – +Closed period Were the interests in the securities or contracts detailed above traded during a +closed period where prior written clearance was required? No If so, was prior written clearance provided to allow the trade to proceed during this period? N/A If prior written clearance was provided, on what date was this provided? N/A