MARIMACA COPPER CORP. — Director's Dealing 2025

Sep 22, 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 Hayden Locke

Date of last notice 12 September 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
	Indirect
Nature of indirect interest	Benson Capital Limited (Mr Locke is a
(including registered holder)	Director and Shareholder of Benson
Note: Provide details of the circumstances giving rise to the relevantinterest.	Capital Limited)
Date of change	22 September 2025

• See chapter 19 for defined terms.

01/01/2011

Appendix 3Y Page 1

Appendix 3Y Change of Director’s Interest Notice

	No. of securities held prior to	change		Direct32,900 ordinary shares
				Indirect
				73,871 CHESS Depositary Interests (CDIs)681,630 Restricted Share Units (RSUs)200,000 unquoted options exercisable atC$3.20 each on or before September 25,2025280,000 unquoted options exercisable atC$5.00 each on or before May 6, 2026450,000 unquoted options exercisable atC$3.69 each on or before December 23,2026150,000 unquoted options exercisable atC$4.00 each on or before May 19, 2028
	Class			RSUsOrdinary shares
	Number acquired			448,298 CDIs (conversion of RSUs)
	Number disposed			106,771 ordinary shares / CDIs
	Value/ConsiderationNote: If consideration is non-cash, provide details and estimatedvaluation			A$1,057,097
	No. of securities held after change			DirectNilIndirect448,298 CDIs233,332 RSUs200,000 unquoted options exercisable atC$3.20 each on or before September 25,2025280,000 unquoted options exercisable atC$5.00 each on or before May 6, 2026450,000 unquoted options exercisable atC$3.69 each on or before December 23,2026150,000 unquoted options exercisable atC$4.00 each on or before May 19, 2028
	Nature of changeExample: on-market trade, off-market trade, exercise of options, issueof securities under dividend reinvestment plan, participation in buy-back			Conversion of RSUs to ordinary sharesSale of ordinary shares to satisfy expectedtax obligations

• 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	N/A
Name of registered holder	N/A
(if issued securities)
Date of change	N/A
No. and class of securities to which	N/A
interest related prior to change
Note: Details are only required for a contract in
relation to which the interest has changed
Interest acquired	N/A
Interest disposed	N/A
Value/Consideration	N/A
Note: If consideration is non-cash, provide details
and an estimated valuation
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.

01/01/2011

Appendix 3Y Page 3