Mr. Louis Castro reports

OROSUR MINING INC ANNOUNCES TOTAL VOTING RIGHTS

During May, 2026, Orosur Mining Inc. issued 2.85 million new common shares of no par value each following the exercise of 2.85 million restricted stock units (as announced on May 19, 2026) and 2,206,000 common shares for a total consideration of $551,500 following the exercise of 2,206,000 warrants at a price of 25 cents from its block listing announced on Jan. 14, 2026.

For the purposes of the disclosure guidance and transparency rules, the company has 401,005,074 common shares in issue. Shareholders may use this figure as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change in their interest in, the share capital of the company under the FCA's (Financial Conduct Authority) Disclosure and Transparency Rules.