Announcement PDF Appendix 3B - Proposed issue of securities Appendix 3B - Proposed issue of securities 1 / 7 Announcement Summary Entity name CASTLE MINERALS LIMITED Announcement Type New announcement Date of this announcement 21/10/2026 The Proposed issue is: Total number of +securities proposed to be issued for a placement or other type of issue ASX +security code +Security description Maximum Number of +securities to be issued New class-code to be confirmed PERFORMANCE RIGHTS - CLASS E 16,700,000 New class-code to be confirmed OPTION EXPIRING 31-OCT-2028 EX $0.15 8,500,000 CDT ORDINARY FULLY PAID 2,933,333 Proposed +issue date 26/10/2026 Refer to next page for full details of the announcement A placement or other type of issue Appendix 3B - Proposed issue of securities Appendix 3B - Proposed issue of securities 2 / 7 Part 1 - Entity and announcement details 1.1 Name of +Entity CASTLE MINERALS LIMITED We (the entity named above) give ASX the following information about a proposed issue of +securities and, if ASX agrees to +quote any of the +securities (including any rights) on a +deferred settlement basis, we agree to the matters set out in Appendix 3B of the ASX Listing Rules. If the +securities are being offered under a +disclosure document or +PDS and are intended to be quoted on ASX, we also apply for quotation of all of the +securities that may be issued under the +disclosure document or +PDS on the terms set out in Appendix 2A of the ASX Listing Rules (on the understanding that once the final number of +securities issued under the +disclosure document or +PDS is known, in accordance with Listing Rule 3.10.3C, we will complete and lodge with ASX an Appendix 2A online form notifying ASX of their issue and applying for their quotation). 1.2 Registered Number Type ABN Registration Number 83116095802 1.3 ASX issuer code CDT 1.4 The announcement is 1.5 Date of this announcement 21/10/2026 1.6 The Proposed issue is: A placement or other type of issue New announcement Appendix 3B - Proposed issue of securities Appendix 3B - Proposed issue of securities 3 / 7 Part 7 - Details of proposed placement or other issue Part 7A - Conditions 7A.1 Do any external approvals need to be obtained or other conditions satisfied before the placement or other type of issue can proceed on an unconditional basis? Part 7B - Issue details Is the proposed security a 'New class' (+securities in a class that is not yet quoted or recorded by ASX) or an 'Existing class' (additional securities in a class that is already quoted or recorded by ASX)? Will the proposed issue of this +security include an offer of attaching +securities? Details of +securities proposed to be issued ASX +security code and description CDT : ORDINARY FULLY PAID Number of +securities proposed to be issued 2,933,333 Offer price details Are the +securities proposed to be issued being issued for a cash consideration? Please describe the consideration being provided for the +securities Pursuant to the notice of extraordinary general meeting dated 18 September 2026: 933,333 to John Mason for consultancy services (Resolution 12) 1,333,333 to Mohamed Niare for consultancy services (Resolution 13) 666,667 to Euroz Hartleys for success fee payable under the Corporate Advisory Engagement (Resolution 14) Please refer to the notice for further details. Please provide an estimate of the AUD equivalent of the consideration being provided for the +securities 0.075000 Will these +securities rank equally in all respects from their issue date with the existing issued +securities in that class? Is the proposed security a 'New Will the proposed issue of this Yes No No Existing class No Appendix 3B - Proposed issue of securities Appendix 3B - Proposed issue of securities 4 / 7 Is the proposed security a 'New class' (+securities in a class that is not yet quoted or recorded by ASX) or an 'Existing class' (additional securities in a class that is already quoted or recorded by ASX)? Will the proposed issue of this +security include an offer of attaching +securities? Details of +securities proposed to be issued ISIN Code (if Issuer is a foreign company and +securities do not have +CDIs issued over them) Have you received confirmation from ASX that the terms of the proposed +securities are appropriate and equitable under listing rule 6.1? Will the entity be seeking quotation of the 'new' class of +securities on ASX? ASX +security code New class-code to be confirmed +Security description PERFORMANCE RIGHTS - CLASS E +Security type Performance options/rights Number of +securities proposed to be issued 16,700,000 Offer price details Are the +securities proposed to be issued being issued for a cash consideration? Please describe the consideration being provided for the +securities Incentive securities Please provide an estimate of the AUD equivalent of the consideration being provided for the +securities 0.072720 Will all the +securities issued in this class rank equally in all respects from their issue date? Performance options/rights details +Security currency AUD - Australian Dollar Exercise price AUD 0.0000 Expiry date 26/10/2031 Details of the type of +security that will be issued if the option is exercised CDT : ORDINARY FULLY PAID Yes No No Yes No New class Appendix 3B - Proposed issue of securities Appendix 3B - Proposed issue of securities 5 / 7 Number of securities that will be issued if the option is exercised 16,700,000 ordinary shares Please provide a URL link for a document lodged with ASX setting out the material terms of the +securities proposed to be issued or provide the information by separate announcement. Is the proposed security a 'New class' (+securities in a class that is not yet quoted or recorded by ASX) or an 'Existing class' (additional securities in a class that is already quoted or recorded by ASX)? Will the proposed issue of this +security include an offer of attaching +securities? Details of +securities proposed to be issued ISIN Code (if Issuer is a foreign company and +securities do not have +CDIs issued over them) Have you received confirmation from ASX that the terms of the proposed +securities are appropriate and equitable under listing rule 6.1? Will the entity be seeking quotation of the 'new' class of +securities on ASX? ASX +security code New class-code to be confirmed +Security description OPTION EXPIRING 31-OCT-2028 EX $0.15 +Security type Options Number of +securities proposed to be issued 8,500,000 Offer price details Are the +securities proposed to be issued being issued for a cash consideration? Please describe the consideration being provided for the +securities Incentive securities Please provide an estimate of the AUD equivalent of the consideration being provided for the +securities 0.033300 Will all the +securities issued in this class rank equally in all respects from their issue date? Yes No No Yes No New class Appendix 3B - Proposed issue of securities Appendix 3B - Proposed issue of securities 6 / 7 Options details +Security currency AUD - Australian Dollar Exercise price AUD 0.1500 Expiry date 31/10/2028 Details of the type of +security that will be issued if the option is exercised CDT : ORDINARY FULLY PAID Number of securities that will be issued if the option is exercised 8,500,000 ordinary shares Please provide a URL link for a document lodged with ASX setting out the material terms of the +securities proposed to be issued or provide the information by separate announcement. Part 7C - Timetable 7C.1 Proposed +issue date 26/10/2026 Part 7D - Listing Rule requirements 7D.1 Has the entity obtained, or is it obtaining, +security holder approval for the entire issue under listing rule 7.1? 7D.1a Date of meeting or proposed meeting to approve the issue under listing rule 7.1 19/10/2026 7D.2 Is a party referred to in listing rule 10.11 participating in the proposed issue? 7D.3 Will any of the +securities to be issued be +restricted securities for the purposes of the listing rules? 7D.4 Will any of the +securities to be issued be subject to +voluntary escrow? Part 7E - Fees and expenses 7E.1 Will there be a lead manager or broker to the proposed issue? 7E.2 Is the proposed issue to be underwritten? 7E.4 Details of any other material fees or costs to be incurred by the entity in connection with the proposed issue Registry Costs No No No No Yes Yes Appendix 3B - Proposed issue of securities Appendix 3B - Proposed issue of securities 7 / 7 Part 7F - Further Information 7F.01 The purpose(s) for which the entity is issuing the securities 1) Payment of services 2) Incentive 7F.1 Will the entity be changing its dividend/distribution policy if the proposed issue proceeds? 7F.2 Any other information the entity wishes to provide about the proposed issue 7F.3 Any on-sale of the +securities proposed to be issued within 12 months of their date of issue will comply with the secondary sale provisions in sections 707(3) and 1012C(6) of the Corporations Act by virtue of: The publication of a cleansing notice under section 708A(5), 708AA(2)(f), 1012DA(5) or 1012DAA(2)(f) No