Mr. Matthew Fisher of La Mancha reports

LA MANCHA INVESTMENTS S. A R. L. TO FILE EARLY WARNING REPORT

La Mancha Investments SARL, a wholly owned subsidiary of La Mancha Resource Fund SCSp, advised by La Mancha Resource Capital LLP, has disposed of 8.5 million ordinary shares of Endeavour Mining PLC, representing approximately 3.5 per cent of the issued and outstanding Endeavour shares. The sale price was $71.25 per Endeavour share for total gross proceeds of approximately $605-million. The disposal was made on Jan. 8, 2026, as a bought block trade to BMO Capital Markets as principal. La Mancha made the disposal for investment management purposes.

Immediately prior to the disposal, La Mancha owned, or exercised control or direction over, 35,289,580 Endeavour shares, representing approximately 14.62 per cent of the then-issued-and-outstanding ordinary shares of Endeavour. As a result of the disposal, La Mancha now owns or exercises control or direction over an aggregate of 26,789,580 Endeavour shares, representing approximately 11.1 per cent of the issued and outstanding Endeavour shares.

Directly or indirectly, La Mancha may, from time to time, acquire additional securities of Endeavour or dispose of all or a portion of the Endeavour shares previously acquired or held, through market transactions, private agreements, treasury issuances or otherwise.

La Mancha's registered office is located at 31-33 Ave. Pasteur, L-2311 Luxembourg. Endeavour's registered office is located at 5 Young St., London, W8 5EH, United Kingdom.

La Mancha intends to file an early warning report containing additional information with respect to the foregoing matters, which will be available under Endeavour's SEDAR+ profile and may also be obtained by contacting Matthew Fisher, general counsel, La Mancha Resource Capital, at legal@lamancha.com or 44-20-3960-2020.