ETHERSTACK PLC — Director's Dealing 2026

May 21, 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

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	Peter Stephens
Date of last notice	15 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 (including registered holder)
Note: Provide details of the circumstances giving rise to the relevant interest.	Citicorp Nominees Pty Limited
Date of change	19 May 2026 and 21 May 2026

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Appendix 3Y

Change of Director's Interest Notice

| No. of securities held prior to change | Direct
1,290,323 fully paid ordinary shares

Indirect
3,179,409 CDIs over fully paid ordinary shares held through HSBC Nominees
6,200,000 CDIs over fully paid ordinary shares held through Citicorp Nominees
52,106 CDIs over fully paid ordinary shares held through ESK Directors’ Holdings |
| --- | --- |
| Class | Ordinary shares |
| Number acquired | 65,000 |
| Number disposed | Nil |
| Value/Consideration
Note: If consideration is non-cash, provide details and estimated valuation | $35,750.00 |
| No. of securities held after change | Direct
1,290,323 fully paid ordinary shares

Indirect
3,179,409 CDIs over fully paid ordinary shares held through HSBC Nominees
6,265,000 CDIs over fully paid ordinary shares held through Citicorp Nominees
52,106 CDIs over fully paid ordinary shares held through ESK Directors’ Holdings |
| 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 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.

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Appendix 3Y

Change of Director's Interest Notice

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