An anonymous director reports

MARIMACA COPPER ANNOUNCES APPOINTMENT OF NICOLE PORCILE AS INDEPENDENT DIRECTOR

Marimaca Copper Corp. has appointed Nicole Porcile as an independent non-executive director of the company.

Ms. Porcile is a Chilean national and senior executive and board director with more than 25 years of international experience across the mining, metals, energy and water sectors. She has extensive experience in governance, socioenvironmental risk management, ESG (environmental, social and governance) and responsible mining standards, regulatory engagement, community relations, human rights and indigenous peoples matters.

Ms. Porcile is the founder and managing partner of Anagea, a leading Chilean socioenvironmental advisory firm advising major mining companies on permitting, compliance and community relations. Ms. Porcile previously held the role of vice-president of corporate affairs and sustainability at Codelco (Corporacion Nacional del Cobre de Chile), the Chilean state-owned mining company and one of the world's largest copper producers, where she was a member of the senior executive team. Prior to Codelco, Ms. Porcile held various senior environmental and corporate affairs roles at Antofagasta Minerals at both the group and operational level, including at Minera Los Pelambres. Ms. Porcile played a key role in shaping the Antofagasta Group's sustainability strategy and supporting the development of its major growth projects.

Ms. Porcile holds a master of science in planning (environmental design) from Oxford Brookes University in the United Kingdom. She brings deep Chilean mining and copper-sector expertise to the board, with direct relevance to the Marimaca oxide deposit and Pampa Medina.

About Marimaca Copper Corp.

Marimaca is a Toronto Stock Exchange- (MARI) and Australian Securities Exchange (MC2)-listed copper company focused on the development of high-quality copper assets in northern Chile. The company's flagship asset is the Marimaca oxide deposit project (MOD), located in Chile's prolific Antofagasta region. It is one of the few globally significant greenfield copper discoveries made in the last decade and represents a low-risk development opportunity, given the proximity to the city of Antofagasta and port of Mejillones, with substantial exploration upside. The company also controls additional exploration properties at Pampa Medina and Madrugador within the Sierra de Medina region, located 30 kilometres from the MOD, where recent drilling has identified both oxide extensions and high-grade sulphide mineralization at depth.

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