Exercise of Warrants and Total Voting Rights

London, February 28th, 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 February , 2025, the Company has issued 9,018,250 new common shares of no par value each ("Common Shares") for a total consideration of US$ 435,894 following an exercise of 9,018,250 warrants from its block listing announced on January 8th 2025.

The Company has 18,279,550 warrants outstanding.

Following Admission, the Company's new issued share capital will comprise 275,006,522 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.