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Hudbay Minerals Inc.

For the period ended Sep 30, 2026. Filed Oct 23, 2026.

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Sep 30, 2026 · Filed Oct 23, 2026

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HBM$20.91+1.6%Stored close · as of Nov 6, 2026
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Contents

EX-99.1 · 11 SAMPLE PREPARATION, ANALYSES & SECURITY

11 SAMPLE PREPARATION, ANALYSES & SECURITY

Sample preparation, analysis, and security procedures were reviewed by the Qualified Person, Olivier Tavchandjian, P. Geo., Hudbay's Senior Vice President, Exploration and Technical Services. The sampling methodology, analyses and security measures used by the previous owners were reviewed and documented in detail in the 2017 Technical Report. The following section provides a summary of the material information related to the sampling work performed prior to 2017 and describes in more detail the methods and processes used for the sampling and analysis during the more recent drilling campaigns performed by Hudbay since 2020.

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