HOCHSCHILD MINING PLC — AGM Information 2022

Mar 4, 2022

4 March 2022

Dear Shareholder,

HOCHSCHILD MINING PLC (the "COMPANY")

NOTICE OF EXTRAORDINARY GENERAL MEETING ("EGM")

Please accept this letter as notification that a Notice of EGM has been published on the Company's website at www.hochschildmining.com/en/investors/shareholder_information/share_price/Amarillo_acquisition and is enclosed for shareholders who have elected to receive hard copies.

The EGM will be held at 2 p.m. on Tuesday 22 March 2022 at the offices of Linklaters LLP, One Silk Street, London, EC2Y 8HQ, United Kingdom.

EGM Arrangements

For the safety of others, those wishing to attend the EGM are required to comply with the entry requirements set out in Note 20 to the Notice of EGM. In addition, shareholders are requested to register their intention to attend by contacting info@hocplc.com by no later than 2 p.m. on Friday 18 March 2022.

As an alternative to attending the EGM in person, shareholders are encouraged to complete and return a hard copy form of proxy to the Company's registrars, or to submit their proxies online, and to appoint the Chairman as proxy. Full details on how to submit proxy votes and the deadline to do so can be found in Note 3 to the Notice of EGM.

In the event circumstances change before the time of the EGM, we will notify shareholders of any change to the arrangements through announcements via the London Stock Exchange and by publishing details on the Company's website.

This letter does not contain the full details of the resolution under consideration at the EGM. This is contained in the Notice of EGM and should be read before you vote or submit your proxy. The Directors consider that the proposed resolution contained in the Notice of EGM is in the best interests of the Company and shareholders as a whole and unanimously recommend that you vote in favour of it, as they intend to do in respect of their own shareholdings.

Proxy voting

You will not receive a hard copy form of proxy for the EGM in the post automatically. Instead, you will be able to vote electronically using the link www.signalshares.com. You will need to log in to your Signal Shares account, or register if you have not previously done so. To register, you will need your Investor Code which is detailed on your share certificate or available from the Company's registrars, Link Group.

You may request a hard copy form of proxy from the Company's registrar, Link Group, by: (i) sending a letter addressed to Link Group at 10th Floor, Central Square, 29 Wellington Street, Leeds, LS1 4DL, United Kingdom; or (ii) contacting Link Group on +44 (0) 371 664 0300 (calls are charged at the standard geographic rate and will vary by provider. Calls outside the United Kingdom will be charged at the applicable international rate. Lines are open between 9:00 a.m. and 5:30 p.m., Monday to Friday excluding public holidays in England and Wales. Please note that the helpline operators cannot provide advice on the merits of the transaction being considered at the EGM or give any financial, legal or tax advice).

Voting by proxy prior to the EGM does not affect your right to attend the EGM and vote in person should you so wish. Proxy votes must be received no later than by 2 p.m. on Friday 18 March 2022.

If you need help with voting online, please contact the Company's registrars, Link Group, using the contact details provided above.

Thank you for your continued support.

Yours sincerely,

Raj Bhasin Company Secretary

Hochschild Mining PLC 17 Cavendish Square London W1G 0PH United Kingdom +44 (0) 20 3709 3260 www.hocplc.com

Incorporated and registered in England and Wales No. 05777693. Registered office as above