Orosur Mining Regulatory News (OMI)

Orosur Mining Inc

Appointment of New Auditor

London, May 23rd 2023: Orosur Mining Inc. (the "Company" or "Orosur") (AIM/TSX-V:OMI) the minerals explorer and developer, is pleased to announce that the Company, on the recommendation of its audit committee, has appointed Baker Tilly WM LLP, as the Company's and Group's auditor.

Executive Chairman, Louis Castro, commented: "We are pleased to appoint Baker Tilly as our auditor. Their size, industry experience and international network aligns well with the Company's activities and cross-border projects.

We would like to thank PwC for the excellent and professional services they have provided to the Company."

For further information, visit www.orosur.ca , follow on twitter @orosurm or 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 / Kasia Brzozowska

Tel: +44 (0) 20 3 470 0470

Turner Pope Investments (TPI) Ltd - Joint Broker

Andy Thacker/James PopeTel: +44 (0)20 3657 0050

Flagstaff Communications and Investor Communications

Tim ThompsonMark EdwardsFergus Mellon

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.

About Orosur Mining Inc.

Orosur Mining Inc. (TSXV / AIM: OMI) is a minerals explorer and developer focused on identifying and advancing projects in South America. The Company operates in Colombia, Argentina and Brazil and has discontinued operations in Uruguay.