Announcement PDF Appendix 3H - Notification of cessation of securities Appendix 3H - Notification of cessation of securities 1 / 4 Announcement Summary Entity name CASTLE MINERALS LIMITED Announcement Type New announcement Date of this announcement Friday October 16, 2026 Details of +securities that have ceased ASX +security code Security description Number of +securities that have ceased The +securities have ceased due to Date of cessation CDTAN OPTION EXPIRING 31-OCT-2026 EX $0.54 1,299,997 Expiry of option or other convertible security without exercise or conversion 31/10/2026 Refer to next page for full details of the announcement Appendix 3H - Notification of cessation of securities Appendix 3H - Notification of cessation of securities 2 / 4 Part 1 - Announcement Details 1.1 Name of +Entity CASTLE MINERALS LIMITED We (the entity named above) provide the following information about our issued capital. 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 16/10/2026 New announcement Appendix 3H - Notification of cessation of securities Appendix 3H - Notification of cessation of securities 3 / 4 Part 2 - Details of +equity securities or +debt securities that have ceased ASX +Security Code and Description CDTAN : OPTION EXPIRING 31-OCT-2026 EX $0.54 Unquoted +equity securities that have ceased Number of securities that have ceased 1,299,997 Reason for cessation Expiry of option or other convertible security without exercise or conversion Date of cessation 31/10/2026 Is the entity paying any consideration for the cessation? Any other information the entity wishes to notify to ASX about the cessation? No Appendix 3H - Notification of cessation of securities Appendix 3H - Notification of cessation of securities 4 / 4 Part 3 - Issued capital following changes Following the cessation of the +securities the subject of this notification, the issued capital of the entity will comprise: The figures in parts 3.1 and 3.2 below are automatically generated and may not reflect the entity's current issued capital if other Appendix 2A, Appendix 3G or Appendix 3H forms are currently with ASX for processing. 3.1 Quoted +equity securities and +debt securities (total number of each +class of +securities quoted on ASX) ASX +security code and description Total number of +securities on issue CDT : ORDINARY FULLY PAID 215,345,535 3.2 Unquoted +equity securities (total number of each +class of +equity securities issued but not quoted on ASX) ASX +security code and description Total number of +securities on issue CDTAE : OPTION EXPIRING 22-DEC-2026 EX $0.15 12,699,985 CDTAF : OPTION EXPIRING 31-MAY-2028 EX $0.12 97,277,257 CDTAN : OPTION EXPIRING 31-OCT-2026 EX $0.54 0 CDTAG : PERFORMANCE RIGHTS 22,566,667 Note: the figures stated in the tables above are used to calculate the total market capitalisation of the entity published by ASX from time to time. The table will not include those classes of +securities that have ceased or lapsed in their entirety in ASX records before the announcement date described in Q1.5, even if the entity has advised ASX of a change to that class of +security in Part 2 of this form.