Peter Garner-Winship

Peter Garner-Winship was promoted to Chief Financial Officer of Marimaca Copper to strengthen financial leadership as the company advances its Chilean Marimaca Oxide Deposit toward construction and production. He is a senior mining finance executive with over 20 years of experience spanning capital allocation, project development, corporate finance, financial reporting and operational readiness in the mining sector. Garner-Winship holds a First Class degree in Music from the University of Oxford and is fluent in Spanish.

He joined Marimaca as Vice President of Finance in March 2026 after 17 years at Anglo American, where he held senior roles in corporate finance, strategic planning and project development. Most recently at Anglo American, he served as Head of Integrated Planning and previously as Head of Capital Management, leading group-wide capital allocation processes, enterprise valuation and portfolio analysis, and supporting strategic transactions and executive decision-making at executive and board level. His experience includes serving as Financial Controller for the US$5.5 billion Quellaveco copper project in Peru, where he helped build the project organisation and finance function through construction and the transition into operations.

Garner-Winship began his career with Deloitte in London and is a Fellow of the Institute of Chartered Accountants in England and Wales.

Career history

• Chief Financial Officer, Marimaca Copper Corp. (2026–present)
• Vice President, Finance, Marimaca Copper Corp. (March 2026)
• Head of Integrated Planning, Anglo American plc (2024–2025)
• Head of Capital Management, Anglo American plc (2022–2024)
• Financial Controller, Quellaveco Copper Project, Anglo American (2018–2022)
• Various senior finance roles, Anglo American plc (2008–2018)
• Auditor, Deloitte, London

What Peter Garner-Winship could bring to Chief Financial Officer at Marimaca Copper: Drawing on nearly two decades at a top-tier global mining house and hands-on experience scaling the finance function through construction of a multi-billion-dollar copper project, Garner-Winship is well-positioned to build robust financial controls, capital allocation discipline and operational reporting systems as Marimaca transitions the Oxide Deposit from development into construction and production. His portfolio management and enterprise valuation expertise at the Anglo American corporate centre, combined with project-delivery experience at Quellaveco, positions him to balance capital efficiency with de-risking during a critical growth phase.