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 Steven Zaninovich Date of last notice 4 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 & Indirect Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest. (A) Direct (B) Jack Zaninovich (associate) (C) Zivvo Pty Ltd ATF Stella Trust (director of trustee and beneficiary) Date of change 20 May 2026 No. of securities held prior to change (B) 1,166,667 Ordinary Shares (B) 2,000,000 unlisted options exercisable $0.12, expiring 31/05/2028 (B) 1,250,000 Performance Rights A expiring 28/10/2030 (B) 2,083,333 Performance Rights B expiring 28/10/2030 (A) 1,400,000 Performance Rights C expiring 31/10/2028 Class & Number acquired 750,000 Ordinary Shares Number disposed n/a Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation $50,585.90 Appendix 3Y Change of Director’s Interest Notice + See chapter 19 for defined terms. Appendix 3Y Page 2 No. of securities held after change (B) 1,166,667 Ordinary Shares (C) 750,000 Ordinary Shares (B) 2,000,000 unlisted options exercisable $0.12, expiring 31/05/2028 (B) 1,250,000 Performance Rights A expiring 28/10/2030 (B) 2,083,333 Performance Rights B expiring 28/10/2030 (A) 1,400,000 Performance Rights C 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 trade. 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 Pursuant to an Executive Services Agreement, Zivvo Pty Ltd ATF Stella Trust has a contractual entitlement, subject to shareholder approval, to 10,000,000 Performance Rights in five equal tranches. Performance Rights (each tranche 2,000,000 rights, 5-year expiry): • Tranche A – Vest upon the Company achieving a 20-day VWAP of $0.12 or greater within three years of issue. • Tranche B – Vest upon the Company achieving a 20-day VWAP of $0.24 or greater within three years of issue. • Tranche C – Vest upon announcement of a JORC (2012) Inferred Mineral Resource of at least 250,000oz Au Eq at ≥1.0g/t Au Eq across any Company tenement. • Tranche D – Vest upon announcement of a JORC (2012) Inferred Mineral Resource of at least 500,000oz Au Eq at ≥1.0g/t Au Eq. • Tranche E – Vest upon announcement of a JORC (2012) Inferred Mineral Resource of at least 1,000,000oz Au Eq at ≥1.0g/t Au Eq (together “10,000,000 Performance Rights”) Nature of interest Indirect interest through Zivvo Pty Ltd ATF Stella Trust pursuant to Executive Services Agreement. Name of registered holder (if issued securities) Zivvo Pty Ltd ATF Stella Trust Date of change 3 March 2026 Appendix 3Y Change of Director’s Interest Notice + See chapter 19 for defined terms. 01/01/2011 Appendix 3Y Page 3 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 Contractual entitlement to 10,000,000 Performance Rights subject to shareholder approval. Interest disposed n/a Value/Consideration Note: If consideration is non- cash, provide details and an estimated valuation n/a Interest after change Indirect contractual interest in 10,000,000 Performance Rights subject to shareholder approval. 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?