Announcement PDF 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 30/9/2001. Name of entity Horizon Minerals Limited ABN 88 007 761 186 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 Warren Hallam Date of last notice 26 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 Direct or indirect interest Indirect Nature of indirect interest (including registered holder) Hallam Superannuation Fund (Beneficiary) Date of change 17 July 2025 No. of securities held prior to change 1. 1,265,244 Fully Paid Ordinary Shares 2. 12,845 Unlisted Options expiring 3 Sep 2026 @ $0.0519 Class Fully Paid Ordinary Shares Number acquired 465,117 Number disposed - Note: Provide details of the circumstances giving rise to the relevant interest. Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation $20,000 No. of securities held after change 1. 1,730,361 Fully Paid Ordinary Shares 2. 12,845 Unlisted Options expiring 3 Sep 2026 @ $0.0519 Nature of change Participation in the Tranche 2 Placement as approved by shareholders at the Company’s General Meeting held on 10 July 2025. Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back + See chapter 19 for defined terms. 17/072025 BT Appendix 3Y Page 1 Part 2 – Change of director’s interests in contracts N/A Part 3 – Closed period 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. 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 + See chapter 19 for defined terms. 17/072025 BT Appendix 3Y Page 2