IMDEX LIMITED — Director's Dealing 2026

Mar 18, 2026

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

19 March 2026

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 Ms Tracey Horton, Director of IMDEX Limited.

Yours faithfully

Imdex Limited

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Michael Tomasz Company Secretary

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Appendix 3Y Change of Director’s Interest Notice

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 Tracey Horton Date of last notice 9 September 2024

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	Indirect
Nature of indirect interest(including registered holder)Note: Provide details of the circumstances giving rise to the relevantinterest.	Interest held by MR JONATHAN WILLIAMHORTON + MRS TRACEY ANN HORTON<J & T HORTON SUPER FUND A/C>
Date of change	19 March 2026
No. of securities held prior to change	15,000
Class	Ordinary
Number acquired	5,180
Number disposed	N/A
Value/ConsiderationNote: If consideration is non-cash, provide details and estimatedvaluation	$3.83 per share
No. of securities held after change	20,180
Nature of changeExample: on-market trade, off-market trade, exercise of options,issue of securities under dividend reinvestment plan, participation inbuy-back	On market trade

• See chapter 19 for defined terms.

01/01/2011 Appendix 3Y Page 1

Appendix 3Y Change of Director’s Interest Notice

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	N/A
Nature of interest	N/A
Name of registered holder(if issued securities)	N/A
Date of change	N/A
No. and class of securities to whichinterest related prior to changeNote: Details are only required for a contract inrelation to which the interest has changed	N/A
Interest acquired	N/A
Interest disposed	N/A
Value/ConsiderationNote: If consideration is non-cash, provide detailsand an estimated valuation	N/A
Interest after change	N/A

Part 3 –[+] Closed period

Part 3 –+Closed period
Were the interests in the securities or contracts detailedabove traded during a+closed period where prior writtenclearance was required?	No
If so, was prior written clearance provided to allow the tradeto proceed during this period?	N/A
If prior written clearance was provided, on what date was thisprovided?	N/A

• See chapter 19 for defined terms.

Appendix 3Y Page 2

01/01/2011