Exercise of Warrants and Total Voting Rights

London, April 30th, 2025, Orosur Mining Inc. ("Orosur" or "the Company") (AIM/TSXV: OMI), a minerals explorer and developer with projects in Colombia, Argentina and Nigeria, advises that, during April, 2025, the Company has issued 1,025,501 new common shares of no par value each ("Common Shares") for a total consideration of US$ 56,138 following an exercise of 1,020,501 warrants from its block listing announced on January 8th 2025.

The Company has 34,789,560 warrants outstanding which includes 19,586,444 new warrants issued as part of the Company's Brokered private placement announced 27 March 2025.

Following Admission, the Company's new issued share capital will comprise 313,543,738 Common Shares. When calculating voting rights, shareholders should 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 Disclosure and Transparency Rules.