Mr. Louis Castro reports

OROSUR MINING INC. DIRECTOR PURCHASE OF SHARES

On Wednesday, Nov. 4, 2026, Louis Castro, executive chairman of Orosur Mining Inc., acquired 100,000 common shares of no par value in the company at an average price of 9.46 pence per share and Nick von Schirnding, independent non-executive director of the company, acquired 106,894 common shares at an average price of 9.3 pence per share.

Following these transactions, Mr. Castro has a total beneficial interest in 305,000 common shares, representing 0.07 per cent of the company's issued share capital and Mr. von Schirnding has a total beneficial interest in 770,864 common shares, representing 0.17 per cent of the company's issued share capital.

Details of the director dealings are set out in the table at the end of the announcement, which has been provided in accordance with the requirements of the United Kingdom Market Abuse Regulation.

About Orosur Mining Inc.

Orosur Mining is a minerals explorer and developer currently operating in Colombia and Argentina.