MARIMACA COPPER CORP. — Director's Dealing 2025

Sep 15, 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 20 May 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 (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest.	Benson Capital Limited (Mr Locke is Director and Shareholder of Benson Capital Limited)
Date of change	12 September 2025

• See chapter 19 for defined terms.

01/01/2011

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Appendix 3Y Change of Director’s Interest Notice

No. of securities held prior to change		Direct 32,900 ordinary shares Indirect 755,501 unquoted restricted share units (RSUs) 200,000 unquoted options exercisable at C$3.20 each on or before September 25, 2025 280,000 unquoted options exercisable at C$5.00 each on or before May 6, 2026 450,000 unquoted options exercisable at C$3.69 each on or before December 23, 2026 150,000 unquoted options exercisable at C$4.00 each on or before May 19, 2028
Class		RSUs
Number acquired		73,871 CHESS Depositary Interests (CDIs)
Number disposed		Conversion of 73,871 RSUs to CDIs
Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation		Nil
No. of securities held after change		Direct 32,900 ordinary shares Indirect 73,871 CDIs 681,630 RSUs 200,000 unquoted options exercisable at C$3.20 each on or before September 25, 2025 280,000 unquoted options exercisable at C$5.00 each on or before May 6, 2026 450,000 unquoted options exercisable at C$3.69 each on or before December 23, 2026 150,000 unquoted options exercisable at C$4.00 each on or before May 19, 2028
Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buy- back		Conversion of RSUs to CDIs

• See chapter 19 for defined terms.

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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 (if issued securities)	N/A
Date of change	N/A
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	N/A
Interest acquired	N/A
Interest disposed	N/A
Value/Consideration Note: If consideration is non-cash, provide details and an estimated valuation	N/A
Interest after change	N/A

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?	N/A
If prior written clearance was provided, on what date was this provided?	N/A

• See chapter 19 for defined terms.

01/01/2011

Appendix 3Y Page 3

Legal/91217008_1