Announcement PDF 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. Name of entity CASTLE MINERALS LIMITED ACN 116 095 802 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 Matthew Horgan Date of last notice 5 November 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 Direct (1) Indirect (2) Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest. MOA Super Pty Ltd ATF MOA Superannuation Fund A/C (director of trustee and beneficiary) Date of change 21 & 22 May 2026 No. of securities held prior to change (1) 557,777 ordinary shares (1) 388,888 unlisted options exercisable at $0.225, expiring 20 July 2026 (1) 33,333 unlisted options exercisable at $0.15, expiring 22 December 2026 (1) 267,592 unlisted options exercisable at $0.12, expiring 31 May 2028 (1) 1,000,000 performance rights expiring 31/10/2028 Class Ordinary shares Number acquired 350,000 Number disposed n/a Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation $23,756.49 Appendix 3Y Change of Director’s Interest Notice + See chapter 19 for defined terms. Appendix 3Y Page 2 No. of securities held after change (1) 557,777 ordinary shares (2) 350,000 ordinary shares (1) 388,888 unlisted options exercisable at $0.225, expiring 20 July 2026 (1) 33,333 unlisted options exercisable at $0.15, expiring 22 December 2026 (1) 267,592 unlisted options exercisable at $0.12, expiring 31 May 2028 (1) 1,000,000 performance rights expiring 31/10/2028 Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back On-market purchase 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? If prior written clearance was provided, on what date was this provided?