MARIMACA COPPER CORP. — Director's Dealing 2026

Apr 1, 2026

Appendix 3Z Final Director’s Interest Notice

Rule 3.19A.3

Appendix 3Z

Final 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 30/9/2001.

Name of entity Marimaca Copper Corp ARBN 683 017 094

We (the entity) give ASX the following information under listing rule 3.19A.3 and as agent for the director for the purposes of section 205G of the Corporations Act.

Name of director	Alan Stephens
Date of last notice	2 October 2025
Date that director ceased to be director	27 March 2026

Part 1 – Director’s relevant interests in securities of which the director is the registered holder

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.

Number & class of securities 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

• See chapter 19 for defined terms.

Appendix 3Z Page 1

11/3/2002

Appendix 3Z Final Director’s Interest Notice

Part 2 – Director’s relevant interests in securities of which the director is not the registered holder

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.

In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust

Name of holder & nature of interestNote: Provide details of the circumstances giving riseto the relevant interestN/a	Number & class of securitiesN/a

Part 3 – Director’s interests in contracts

Detail of contract	N/a
Nature of interest	N/a
Name of registered holder(if issued securities)	N/a
No. and class of securities to whichinterest relates	N/a

• See chapter 19 for defined terms.

Appendix 3Z Page 2

11/3/2002