Announcement PDF Form 605 Corporations Act 2001 Section 671B Notice of ceasing to be a substantial holder To Company Name/Scheme Hillgrove Resources Limited (ASX:HGO) ACN/ARSN 004 297 116 1. Details of substantial holder Name The companies and partnerships listed in Annexure “A” (“Substantial Holder Group”) ACN/ARSN (if applicable) The holder ceased to be a substantial holder on 04/05/2026 The previous notice was given to the company on 22/04/2026 The previous notice was dated 22/04/2026 2. Changes in relevant interests Particulars of each change in, or change in the nature of, a relevant interest of the substantial holder or an associate in voting securities of the company or scheme, since the substantial holder was last required to give a substantial holding notice to the company or scheme are as follows: See Annexure B 3. Changes in association The persons who have become associates of, ceased to be associates of, or have changed the nature of their association with, the substantial holder in relation to voting interests in the company or scheme are as follows: Name and ACN/ARSN (if applicable) Nature of association 4. Addresses The addresses of persons named in this form are as follows: Name Address Ariadne Australia Limited Level 19, 2 Chifley Square, Sydney NSW 2000 Ariadne Holdings Pty Limited Level 19, 2 Chifley Square, Sydney NSW 2000 Portfolio Services Pty Limited Level 19, 2 Chifley Square, Sydney NSW 2000 Signature print name Natt McMahon capacity Company Secretary – Ariadne Australia Limited ______________________________________________________________________________________ sign here date 06/05/2026 _______________________________________________________ Annexure A to form 605 This is Annexure A of 1 page referred to in ASIC form 605 (Notice of ceasing to be a substantial holder), for Hillgrove Resources Limited ACN 004 297 116 Sign here: _________________________ Print name: Natt McMahon Date: 06/05/2026 Ariadne Australia Limited, ACN 010 474 067 Ariadne Holdings Pty Limited, ACN 008 460 357 Portfolio Services Pty Limited, ACN 010 565 670 Annexure B to form 605 This is Annexure B of 1 page referred to in ASIC form 605 (Notice of change of ceasing to be a substantial holder), for Hillgrove Resources Limited ACN 004 297 116 Sign here: _________________________ Print name: Natt McMahon Date: 06/05/2026 Holder of Relevant Interest Transaction Type Date No. Shares Consideration Portfolio Services Pty Ltd Sale on market 04/05/2026 40,000,000 $1,600,000