IONEER LTD — Director's Dealing 2025

Nov 6, 2025

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 Ioneer Ltd ABN 76 098 564 606

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	Margaret R. Walker
Date of last notice	17 July 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 relevantinterest.	N/A
Date of change	5 November 2025
No. of securities held prior to change	132,190 performance rights8,828 ADRs. Each ADR accounts for 40Fully Paid Ordinary Shares. The ADRs areissued by The Bank of New York Mellon andthe custodian is HSBC Bank AustraliaLimited.670,070 fully paid ordinary shares

• See chapter 19 for defined terms.

01/01/2011 Appendix 3Y Page 1

Appendix 3Y Change of Director’s Interest Notice

Class	Performance Rights & Ordinary Shares
Number acquired	188,083 Performance Rights132,190 Ordinary Shares
Number disposed	132,190 Performance Rights
Value/ConsiderationNote: If consideration is non-cash, provide details and estimated valuation	Nil - performance rights in lieu of directorfees
No. of securities held after change	188,083 performance rights8,828 ADRs. Each ADR accounts for 40Fully Paid Ordinary Shares. The ADRs areissued by The Bank of New York Mellon andthe custodian is HSBC Bank AustraliaLimited.802,260 fully paid ordinary shares
Nature of changeExample: on-market trade, off-market trade, exercise of options, issue ofsecurities under dividend reinvestment plan, participation in buy-back	Vesting of performance Rights into ordinaryshares.Issue of unlisted performance rights pursuantto remuneration package with the Companyas approved by shareholders on 31 October2025

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
Name of registered holder(if issued securities)
Date of change

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

Part 3 –[+] Closed period

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

• See chapter 19 for defined terms.

01/01/2011 Appendix 3Y Page 3