For a description of the key assumptions, parameters and methods used to estimate mineral reserves and resources, as well as data verification procedures and a general discussion of the extent to which the estimates may be affected by any known environmental, permitting, legal title, taxation, sociopolitical, marketing or other relevant factors, please see the most recent technical report for Copper Mountain titled “NI 43-101 Technical Report, Updated Mineral Resources and Mineral Reserves Estimate, Copper Mountain Mine”, effective as of December 1, 2023, a copy of which is available under Hudbay’s profile on SEDAR+ at www.sedarplus.ca and on EDGAR at www.sec.gov.