MARIMACA COPPER CORP. — Share Issue/Capital Change 2026

Feb 26, 2026

Appendix 3B - Proposed issue of securities

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Announcement Summary

Entity name

MARIMACA COPPER CORP.

Announcement Type

New announcement

Date of this announcement

27/2/2026

The Proposed issue is:

A placement or other type of issue

Total number of +securities proposed to be issued for a placement or other type of issue

		Maximum Number of
ASX +security code	+Security description	+securities to be issued
MC2AA	COMMON SHARES	527,537

Proposed +issue date

10/4/2026

Refer to next page for full details of the announcement

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Appendix 3B - Proposed issue of securities

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Part 1 - Entity and announcement details

1.1 Name of +Entity

MARIMACA COPPER CORP.

We (the entity named above) give ASX the following information about a proposed issue of +securities and, if ASX agrees to +quote any of the +securities (including any rights) on a +deferred settlement basis, we agree to the matters set out in Appendix 3B of the ASX Listing Rules.

If the +securities are being offered under a +disclosure document or +PDS and are intended to be quoted on ASX, we also apply for quotation of all of the +securities that may be issued under the +disclosure document or +PDS on the terms set out in Appendix 2A of the ASX Listing Rules (on the understanding that once the final number of +securities issued under the +disclosure document or +PDS is known, in accordance with Listing Rule 3.10.3C, we will complete and lodge with ASX an Appendix 2A online form notifying ASX of their issue and applying for their quotation).

1.2 Registered Number Type

ARBN

Registration Number

683017094

1.3 ASX issuer code

MC2

1.4 The announcement is

New announcement

1.5 Date of this announcement

27/2/2026

1.6 The Proposed issue is:

A placement or other type of issue

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Appendix 3B - Proposed issue of securities

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Part 7 - Details of proposed placement or other issue

Part 7A - Conditions

7A.1 Do any external approvals need to be obtained or other conditions satisfied before the placement or other type of issue can proceed on an unconditional basis? Yes 7A.1a Conditions

Approval/Condition Other (please specify in comment section)

Date for determination Is the date estimated or ** Approval actual? received/condition met? 6/4/2026 Estimated No

Comments

Completion of the Placement is subject to certain closing conditions, including but not limited to the receipt of all necessary regulatory and other approvals, including the approval of the Toronto Stock Exchange.

Part 7B - Issue details

Is the proposed security a 'New class' (+securities in a class that is not yet quoted or recorded by ASX) or an 'Existing class' (additional securities in a class that is already quoted or recorded by ASX)? Existing class

Will the proposed issue of this +security include an offer of attaching +securities? No

Details of +securities proposed to be issued

ASX +security code and description MC2AA : COMMON SHARES

Number of +securities proposed to be issued

527,537

Offer price details

Are the +securities proposed to be issued being issued for a cash consideration? Yes

In what currency is the cash What is the issue price per consideration being paid? +security? CAD - Canadian Dollar CAD 10.00000

AUD equivalent to issue price amount per +security

10.350000

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Appendix 3B - Proposed issue of securities

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FX rate (in format AUD 1.00 / primary FX rate (in format AUD rate/primary currency rate): currency rate) Primary Currency rate CAD 0.96610000 AUD 1.00

Will these +securities rank equally in all respects from their issue date with the existing issued +securities in that class? Yes

Part 7C - Timetable

7C.1 Proposed +issue date 10/4/2026

Part 7D - Listing Rule requirements

7D.1 Has the entity obtained, or is it obtaining, +security holder approval for the entire issue under listing rule 7.1? No

7D.1b Are any of the +securities proposed to be issued without +security holder approval using the entity's 15% placement capacity under listing rule 7.1? No

7D.1c Are any of the +securities proposed to be issued without +security holder approval using the entity's additional 10% placement capacity under listing rule 7.1A (if applicable)? No 7D.2 Is a party referred to in listing rule 10.11 participating in the proposed issue? No 7D.3 Will any of the +securities to be issued be +restricted securities for the purposes of the listing rules? No 7D.4 Will any of the +securities to be issued be subject to +voluntary escrow? No

Part 7E - Fees and expenses

7E.1 Will there be a lead manager or broker to the proposed issue? No 7E.2 Is the proposed issue to be underwritten? No

7E.4 Details of any other material fees or costs to be incurred by the entity in connection with the proposed issue

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Appendix 3B - Proposed issue of securities

Part 7F - Further Information

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7F.01 The purpose(s) for which the entity is issuing the securities

Pursuant to an existing agreement between the Company & Mitsubishi Corporation, the Company has provided Mitsubishi with a notice to purchase additional Shares in order to maintain its pro rata shareholdings following the recent Canadian Treasury Offering.

7F.1 Will the entity be changing its dividend/distribution policy if the proposed issue proceeds? No

7F.2 Any other information the entity wishes to provide about the proposed issue

The participation right is exercisable by Mitsubishi for a period of 30 business days following the closing of the Canadian Treasury Offering, and if exercised will be completed by way of private placement and subject to approval by the TSX.

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