IMDEX LIMITED — Director's Dealing 2026

May 19, 2026

IMDEX

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

20 May 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 Mr Paul House, CEO and Managing Director of IMDEX Limited.

Mr House’s disposal notified in this 3Y is the first sale of shares that Mr House has undertaken since joining IMDEX in 2017. The disposal was primarily to manage Mr House’s existing personal tax obligations, including those tax liabilities arising from the vesting of granted IMDEX incentive awards. Post the disposal, Mr House retains in excess of 1.7 million ordinary shares in IMDEX.

Yours faithfully
Imdex Limited

Michael Tomasz
Company Secretary

Classification | Public

---

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	Paul House
Date of last notice	21 October 2025

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	20 May 2026
No. of securities held prior to change	2,238,935 Ordinary Shares
2,201,459 Performance Rights
Class	Ordinary
Number acquired	Nil
Number disposed	463,638
Value/Consideration
Note: If consideration is non-cash, provide details and estimated valuation	Average price of $3.97 per share, traded between 14-20 May 2026
No. of securities held after change	1,775,297 Ordinary Shares
2,201,459 Performance Rights
Nature of change
Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy-back	On-market trade

• See chapter 19 for defined terms.

01/01/2011 Appendix 3Y Page 1

Classification | Public

---

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 which interest related prior to change
Note: Details are only required for a contract in relation to which the interest has changed	N/A
Interest acquired	N/A
Interest disposed	N/A
Value/Consideration
Note: If consideration is non-cash, provide details and an estimated valuation	N/A
Interest after change	N/A

Part 3 – ${}^{+}$ Closed period

Were the interests in the securities or contracts detailed above traded during a +closed period where prior written clearance was required?	No
If so, was prior written clearance provided to allow the trade to proceed during this period?	N/A
If prior written clearance was provided, on what date was this provided?	N/A

• See chapter 19 for defined terms.

Appendix 3Y Page 2

01/01/2011

Classification | Public