ETHERSTACK PLC — Director's Dealing 2026

Apr 12, 2026

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 Etherstack plc ARBN 156 640 532

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	David Deacon
Date of last notice	9 December 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	Indirect
Nature of indirect interest	Injinup Pty Ltd
(including registered holder)
Note: Provide details of the circumstances giving rise to the relevant
interest.
Date of change	8 April 2026
No. of securities held prior to change	Direct
	47,711,850 fully paid Ordinary Shares
	Indirect
	850,000 fully paid Ordinary Shares held
	through Injinup Pty Ltd
Class	Ordinary Shares

• See chapter 19 for defined terms.

01/01/2011 Appendix 3Y Page 1

Appendix 3Y Change of Director’s Interest Notice

Number acquired	10,000 units
Number disposed	Nil
Value/ConsiderationNote: If consideration is non-cash, provide details and estimatedvaluation	$6,400.00
No. of securities held after change	Direct47,711,850 fully paid Ordinary SharesIndirect860,000 fully paid Ordinary Shares heldthrough Injinup Pty Ltd
Nature of changeExample: on-market trade, off-market trade, exercise of options,issue of securities under dividend reinvestment plan, participation inbuy-back	On market purchase

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	Not applicable
Nature of interest	Not applicable
Name of registered holder(if issued securities)	Not applicable
Date of change	Not applicable

• See chapter 19 for defined terms.

Appendix 3Y Page 2

01/01/2011

Appendix 3Y Change of Director’s Interest Notice

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	Not applicable
Interest acquired	Not applicable
Interest disposed	Not applicable
Value/ConsiderationNote: If consideration is non-cash, provide detailsand an estimated valuation	Not applicable
Interest after change	Not applicable

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?	Not applicable
If prior written clearance was provided, on what date was thisprovided?	Not applicable

• See chapter 19 for defined terms.

01/01/2011 Appendix 3Y Page 3