Exercise of Warrants and Total Voting Rights

London, January 31st, 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, since January 6th, 2025, the Company has issued 4,550,420 new common shares of no par value each ("Common Shares") for a total consideration of US$ 243,231 following an exercise of 2,881,356 warrants at an exercise price of US$0.0588 each (approximately 4.429p); and, an exercise of 1,669,064 warrants at an exercise price of US$ 0.0494 each (approximately 3.921p) from its block listing as announced on January 8th 2025.

The Company has 27,297,800 warrants outstanding.

Following Admission, the Company's new issued share capital will comprise 265,821,606 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.