Orosur Mining Regulatory News (OMI)

Orosur Mining Inc

Total Voting Rights

London, February 27th, 2026, Orosur Mining Inc. ("Orosur" or "the Company") (AIM/TSXV: OMI), a minerals explorer and developer with projects in Colombia and Argentina, advises that during February 2026, the Company has issued 1,316,949 new common shares of no par value each ("Common Shares") for a total consideration of US$110,703 following the exercise of 1,016,949 warrants at a price of US$0.0558 and 300,000 warrants at a price of Cdn$0.25 respectively from its block listing announced January 14, 2026.

For the purposes of the Disclosure Guidance and Transparency Rules, the Company has 394,547,125 Common Shares in issue. This figure includes the 85,000 Common Shares scheduled to be admitted to trading on 2nd March, as announced on 26th February 2026. 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 Disclosure and Transparency Rules.

For further information, visit www.orosur.ca, follow on X @orosurm or please contact:

Orosur Mining Inc

Louis Castro, Chairman

Brad George, CEO

info@orosur.ca

Tel: +1 (778) 373-0100

SP Angel Corporate Finance LLP - Nomad & Joint Broker

Jeff Keating / Jen Clarke / Caroline Rowe / Devik Mehta

Tel: +44 (0) 20 3470 0470

Turner Pope Investments (TPI) Ltd - Joint Broker

Andy Thacker/Guy McDougallTel: +44 (0)20 3657 0050

Flagstaff Communications and Investor Communications

Tim ThompsonFergus Mellon

Allison Allfrey

orosur@flagstaffcomms.com

Tel: +44 (0)207 129 1474

The information contained within this announcement is deemed by the Company to constitute inside information as stipulated under the Market Abuse Regulations (EU) No. 596/2014 ('MAR') which has been incorporated into UK law by the European Union (Withdrawal) Act 2018. Upon the publication of this announcement via Regulatory Information Service ('RIS'), this inside information is now considered to be in the public domain.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.