IONEER LTD — Director's Dealing 2025

Jul 1, 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	James Derrick Calaway
Date of last notice	19 November 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		Direct and indirect
Nature of indirect interest(including registered holder)Note: Provide details of the circumstances giving rise to the relevantinterest.		Lithium Investors Americas LLC which iscontrolled by James
Date of change		1 July 2025
No. of securities held prior to change		Lithium Investors Americas LLC56,268,106 fully paid ordinary sharesJames Derrick Calaway326,323 unlisted options, exercise price of$0.1846 per option, exercisable on or after 16November2021andexpiringon16November 20255,939,542 performance rights2,727,004 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	Class	Class		Issue of ordinary shares on vesting ofperformance rights and lapse of performance	Issue of ordinary shares on vesting ofperformance rights and lapse of performance	Issue of ordinary shares on vesting ofperformance rights and lapse of performance	Issue of ordinary shares on vesting ofperformance rights and lapse of performance
					rights
	Num	ber acquired			2619126 full aid ord	inar shares
					,, y p	y
	N	b did
	um	er spose			2,954,766 performance	ights
	ValuNote:	e/ConsiderationIf consideration is non-cash roide details and estimated	alation		Nil, performance right	s issued under the
		, pv	u		Ioneer Employee Incent	ve Plan.
	No.	of securities held after change			Lithium Investors Amer	icas LLC
					56268106 fll id	i h
					,, uy pa or	nary sares
					James Derrick Calaway
					326323 unlisted optio	s exercise price of
					,$0.1846 per option, exer	,cisable on or after 16
					November2021andexpiringon16
					November 20252,984,776 performance rights5,346,130 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 2,619,126 performance rights andissue of 2,619,126 fully paid ordinary shares.Lapse of 335,640 performance rights.

• See chapter 19 for defined terms.

Appendix 3Y Page 2

01/01/2011

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

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.

01/01/2011 Appendix 3Y Page 3