MARIMACA COPPER CORP. — Share Issue/Capital Change 2026

May 14, 2026

marimaca COPPER CORK

News Release

Shares issued pursuant to Conversion of Options Notice under section 708A(5)(e) of the Corporations Act

This notice is given by Marimaca Copper Corp. (TSX: MARI) (ASX: MC2) ("Marimaca" or the "Company") under section 708A(5)(e) of the Corporations Act 2001 (Cth) (Corporations Act).

The Company issued 198,710 common shares (Shares) on 6 May 2026 on the conversion of Company Options exercisable at C$5.00.

The Company advises that:

1. the Shares were issued without disclosure to investors under Part 6D.2 of the Corporations Act;
2. this notice is being given under section 708A(5)(e) of the Corporations Act;
3. as a disclosing entity, the Company is subject to regular reporting and disclosure obligations;
4. as at the date of this notice, the Company has complied with:
   a. the provisions of Chapter 2M of the Corporations Act as they apply to the Issuer; and
   b. sections 674 and 674A of the Corporations Act; and
5. as at the date of this notice, there is no information that is "excluded information" within the meanings of sections 708A(7) and 708A(8) of the Corporations Act, other than drill results from a recent drilling program at the Company's Pampa Medina project which were recently returned to the Company and are in the process of being interpreted. The interpretation of the drill results by the Company is ongoing, incomplete and confidential.

This news release is authorized for release by the Board of Directors of Marimaca.

Contact Information

For further information please visit www.marimaca.com or contact:

Tavistock
+44 (0) 207 920 3150
Emily Moss / Ruairi Millar
marimaca@tavistock.co.uk

None of the TSX, ASX or the Canadian Investment Regulatory Organization accepts responsibility for the adequacy or accuracy of this release.