MARIMACA COPPER CORP. — Director's Dealing 2025

Oct 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	Marimaca Copper Corp.
ARBN	683 017 094

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	Name of Director	Name of Director	Alan Stephens	Alan Stephens	Alan Stephens	Alan Stephens	Alan Stephens
	Date	of last notice		20 May 2025
Part 1		- Change of director’s relevan	t interests in securit		ies

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 or indirect interest	Direct	Direct	Direct	Direct
	Nature(includ	of indirect interesting registered holder)
	Note: Prol i	vide details of the circumstances giving rise to the
	reevant	nterest.
	Date o	f change	25 – 2	9 September 2025
	No. of	securities held prior to change	1999	93 common shares
			,1701	91 Restricted Share	Units (RSUs)
			,2000	00 unquoted opti	ons exercisable at
			,C$3.2	0 each on or before	September 25, 2025
			280,0	00 unquoted opti	ons exercisable at
			C$5.0	0 each on or before	May 6, 2026
	Class		RSUs
	Number acquired		132,203 RSUs
	Number disposed		200,000 unquoted options exercisable atC$3.20 each on or before September 25,2025

• See chapter 19 for defined terms.

01/01/2011

Appendix 3Y Page 1

Appendix 3Y Change of Director’s Interest Notice

Value/Consideration Nil Note: If consideration is non-cash, provide details and estimated valuation

No. of securities held after change 199,993 common shares 302,394 Restricted Share Units (RSUs) 280,000 unquoted options exercisable at C$5.00 each on or before May 6, 2026 Nature of change Award of RSUs Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, Lapse of unquoted options participation in buy-back

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 whichinterest related prior to changeNote: Details are only required for a contract inrelation to which the interest has changed	N/A
Interest acquired	N/A
Interest disposed	N/A
Value/ConsiderationNote: If consideration is non-cash, provide detailsand an estimated valuation	N/A
Interest after change	N/A

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 N/A trade to proceed during this period? If prior written clearance was provided, on what date was N/A this provided?

• See chapter 19 for defined terms.

Appendix 3Y Page 2

01/01/2011