Further re Change of Auditor.

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8 April 2026

Further re Change of Auditor

Further to the announcement of 5 November 2024 on the selection of Deloitte LLP ("Deloitte") as external auditor of Hochschild Mining PLC (the "Company") and its subsidiaries (collectively, the "Group"), the Company confirms that it has received notification from Ernst & Young LLP ("EY") of its resignation following the completion of the audit for the year ended 31 December 2025.

EY makes the following statement in its notice of resignation:

 "In accordance with section 519(1) of the [Companies Act 2006], we are ceasing to hold office in accordance with mandatory rotation requirements after being your auditors for 20 years."

A resolution to approve the appointment of Deloitte as external auditor for the year ending 31 December 2026 will be proposed at the Company's Annual General Meeting to be held on 9 June 2026, details of which will be confirmed in due course.

The Company wishes to thank EY for their services over the years.  As required by section 520(2) of the Companies Act 2006, the Company will send a copy of EY's notification and section 519(1) statement to all shareholders for information only.

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Enquiries:

Hochschild Mining PLC

Raj Bhasin                                                                                                                                                                                 +44 (0)7825 533495

Company Secretary

Hudson Sandler

Charlie Jack                                                                                                                                                                                 +44 (0)20 7796 4133

Public Relations

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About Hochschild Mining PLC

Hochschild Mining PLC is a leading precious metals company listed on the London Stock Exchange (HOCM.L / HOC LN) and crosstrades on the OTCQX Best Market in the U.S. (HCHDF), with a primary focus on the exploration, mining, processing and sale of silver and gold. Hochschild has over fifty years' experience in the mining of precious metal epithermal vein deposits and operates two underground epithermal vein mines: Inmaculada, located in southern Peru; and San Jose in southern Argentina, and an open pit gold mine, Mara Rosa, located in the state of Goiás, Brazil.  Hochschild also has numerous long-term projects throughout the Americas.

LEI: 549300JK10TVQ3CCJQ89