Ero Copper Corp.

For the period ended Dec 31, 2025. Filed Mar 30, 2026.

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The yearly report of certain Canadian companies, filed under a joint US and Canadian system. It is the main yearly account these companies give US investors, largely as filed in Canada.

FY2025 · Filed Mar 30, 2026

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ERO$28.86+2.7%Stored close · as of Nov 6, 2026

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Contents

CODE OF CONDUCT

The Company has adopted a Code of Business Conduct and Ethics (the "Code of Ethics") that applies to its officers and employees, including the CEO, CFO, principal accounting officer or controller and persons performing similar functions. A copy of the Code of Ethics is available on the Company’s website at www.ero.com.

During the financial year ended December 31, 2025, no waivers of the Code of Ethics were granted and the Company did not make any amendments to its Code of Ethics. All amendments to the Code of Ethics, and all waivers of the Code of Ethics with respect to any of the officers covered by it, will be posted on the Company’s website at www.ero.com.

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