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Orosur files 43-101 technical report for its Anza Project in Colombia London

Resource Estimates Technical Reports (NI 43-101)

Orosur Mining Inc.

Orosur files 43-101 technical report for its Anza Project in Colombia

London March 26 th 2026 : Orosur Mining Inc. (“Orosur” or the “ Company”)

(TSXV/AIM:OMI), is pleased to announce the filing of a National Instrument 43-101 -

Standards of Disclosure for Mineral Projects - compliant technical report in support of

the Company’s 100%-owned Anza Project in Colombia including its maiden Mineral

Resource Estimate for the Pepas deposit. Effective date of the report is 16 th January

2026, and issue date is 25 th March 2026. The report supports the disclosures made

by the Company in its announcement of February 10th, 2026.

The technical report can be found on the Company’s website at www.orosur.ca and

by reviewing its profile on SEDAR+ at www.sedarplus.ca.

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

Orosur Mining Inc

Louis Castro, Chairman,

Brad George, CEO

[email protected]

Tel: +1 (778) 373-0100

SP Angel Corporate Finance LLP – Nomad & Joint Broker

Jeff Keating / Jen Clarke / Devik Mehta

Tel: +44 (0) 20 3470 0470

Turner Pope Investments (TPI) Ltd – Joint Broker

Andy Thacker/Guy McDougall

Tel: +44 (0)20 3657 0050

Flagstaff Communications and Investor Communications

Tim Thompson

Mark Edwards

[email protected]

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 (Withdrawa l) 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: OMI; AIM: OMI) is a minerals explorer and developer currently operating in Colombia

and Argentina.