Hudbay Minerals Inc.

For the period ended Mar 3, 2026. Filed Mar 5, 2026.

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Mar 3, 2026 · Filed Mar 5, 2026

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

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Contents

EXPLANATORY NOTE

On March 3, 2026, Hudbay Minerals Inc. (“Hudbay”) filed on the Canadian Securities Administrators’ System for Electronic Document Analysis and Retrieval (SEDAR) website at www.sedarplus.ca the following document: (1) Early Warning Report.

Copies of the filing are attached to this Form 6-K and incorporated herein by reference, as follows:

Exhibit 99.1 — Early Warning Report

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