Endeavour Mining PLC — Proxy Solicitation & Information Statement 2026

Apr 7, 2026

ENDEAVOUR
MINING
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Notice of Availability of Proxy Materials for ENDEAVOUR MINING PLC Annual General Meeting

Meeting Date and Location:

When: May 21, 2026
2:00 pm (London Time)

Where: Linklaters LLP, 20 Ropemaker Street, London EC2Y 9AR United Kingdom and online at meetnow.global/EDMAGM2026

You are receiving this notice to advise that the proxy materials for the above noted security holders' meeting are available on the Internet. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We remind you to access and review all of the important information contained in the information circular and other proxy materials before voting.

The information circular and other relevant materials are available at:

https://www.endeavourmining.com/investors/shareholder-information/agm-and-special-meetings/

OR

www.sedarplus.ca

How to Obtain Paper Copies of the Proxy Materials

Security holders may request to receive paper copies of the current meeting materials by mail at no cost. Requests for paper copies may be made using your Control Number as it appears on your enclosed Voting Instruction Form or Proxy. To ensure you receive the materials in advance of the voting deadline and meeting date, all requests must be received no later than May 11, 2026. If you do request the current materials, please note that another Voting Instruction Form/Proxy will not be sent; please retain your current one for voting purposes.

For Holders with a 15 digit Control Number:

Request materials by calling Toll Free, within North America - 1-866-962-0498 or direct, from Outside of North America - (514) 982-8716 and entering your control number as indicated on your Voting Instruction Form or Proxy.

To obtain paper copies of the materials after the meeting date, please contact 1-800-564-6253.

For Holders with a 16 digit Control Number:

Request materials by calling Toll Free, within North America - 1-877-907-7643 or direct, from Outside of North America - 1-303-562-9305 and entering your control number as indicated on your Voting Instruction Form.

To obtain paper copies of the materials after the meeting date, please contact 1-800-564-6253.

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Security holder Meeting Notice

The resolutions to be voted on at the meeting are listed below along with the Sections within the Information Circular where disclosure regarding the matter can be found.

1. To receive the Company's accounts and the reports of the Directors and Auditors for the year ended 31 December 2025.
2. To re-elect Alison Baker as a Director.
3. To re-elect Catherine Lawson-Hall as a Director.
4. To re-elect Ian Cockerill as Director.
5. To re-elect John Munro as a Director.
6. To re-elect Naguib Sawiris as a Director.
7. To re-elect Patrick Bouisset as a Director.
8. To re-elect Sakhila Mirza as a Director.
9. To re-elect Srinivasan Venkatakrishnan as a Director.
10. To elect Alison Henwood as a Director.
11. To reappoint BDO LLP as auditors of the Company to hold office until the conclusion of the next general meeting at which accounts are laid before the Company.
12. To authorise the Audit and Risk Committee to fix the remuneration of the auditors of the Company.
13. To approve the Directors' Remuneration Report set out on pages 90 to 107 of the 2025 Annual Report.
14. Authority to allot shares or grant rights to subscribe for or to convert any securities into shares.
15. Authority to disapply pre-emption rights.
16. Additional authority to disapply pre-emption rights.
17. Authority to purchase own ordinary shares.
18. That a general meeting other than an Annual General Meeting may be called on not less than 14 clear days' notice.

Voting

PLEASE NOTE - YOU CANNOT VOTE BY RETURNING THIS NOTICE. To vote your securities you must vote using the methods reflected on your enclosed Voting Instruction Form or Proxy.

PLEASE VIEW THE INFORMATION CIRCULAR PRIOR TO VOTING

Annual Reports are available online:
https://www.endeavourmining.com/investors/results-and-reporting/

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