MARIMACA COPPER CORP. — Board/Management Information 2025

Nov 9, 2025

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News Release

Resignation of Company Secretary

Vancouver, British Columbia, November 10, 2025 – Marimaca Copper Corp. (“Marimaca Copper” or the “Company”)

(TSX:MARI, ASX:MC2) announces the resignation of its General Counsel and Company Secretary, Solange González.

The Board thanks Ms González for her contribution to the Company and wishes her all the best for the future.

This news release is authorised 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