IMDEX LIMITED DISCLOSUREInsider Transactions (Form 3/4/5)

Change of Director's Interest Notice

Company Announcements Office ASX Limited Exchange Centre 20 Bridge Street SYDNEY NSW 2001 Dear Sir / Madam, APPENDIX 3Y – CHANGE IN DIRECTOR’S INTEREST NOTICE Please find attached Appendix 3Y notice in respect of Mr Paul House, CEO and Managing Director of IMDEX Limited. 21 August 2026 IMDEX Limited ACN 008 947 813 (IMDEX or Company) advises that on 21 August 2026 the Company issued shares to Mr Paul House subject to the terms and conditions of the Company's Employee Rights Plan (ERP) approved by shareholders on 7 October 2021. Yours faithfully Imdex Limited Michael Tomasz Company Secretary IMDEX LIMITED | ABN 78 008 947 813 216 Balcatta Rd, Balcatta WA 6021 Australia PO Box 1262, Osborne Park WA 6916 Australia +61 8 9445 4010 imdexlimited.com For personal use only 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. Introduced 30/09/01 Amended 01/01/11 Name of entity: Imdex Limited ABN: 78 008 947 813 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 Paul House Date of last notice 1 July 2026 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 Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest. N/A Date of change 21 August 2026 No. of securities held prior to change Class Ordinary Number acquired 1,067,922 Number disposed N/A Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation No. of securities held after change Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend