Orosur Mining Inc. Announces 43-101 Technical Report for its Anza Project

Rhea-AI Summary

Orosur Mining (TSXV:OROXF) filed a National Instrument 43-101 technical report for its 100%‑owned Anza Project in Colombia, including a maiden Mineral Resource Estimate for the Pepas deposit.

The report has an effective date of 16 January 2026 and an issue date of 25 March 2026, and supports prior disclosures of 10 February 2026.

Positive

• Filed NI 43-101 technical report with effective date 16 January 2026
• Completed maiden Mineral Resource Estimate for the Pepas deposit at Anza Project

Negative

• None.

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

LONDON, UK / ACCESS Newswire / March 26, 2026 / Orosur Mining Inc. (" Orosur " or the " Company ") (TSXV:OMI)(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 10 ^th , 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
info@orosur.ca
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

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:OMI)(AIM:OMI) is a minerals explorer and developer currently operating in Colombia and Argentina.

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.

SOURCE: Orosur Mining Inc

View the original press release on ACCESS Newswire

FAQ

What did OROXF announce about the Anza Project on March 26, 2026?

Orosur announced it filed a NI 43-101 technical report for Anza Project on March 26, 2026. According to the company, the report includes a maiden Mineral Resource Estimate for the Pepas deposit and has an effective date of 16 January 2026.

Does the OROXF 43-101 report include a maiden Mineral Resource Estimate for Pepas?

Yes, the 43-101 report includes a maiden Mineral Resource Estimate for the Pepas deposit. According to the company, the estimate is contained within the technical report filed with an issue date of 25 March 2026.

Where can investors access the OROXF Anza Project 43-101 technical report?

Investors can access the technical report on the company website and SEDAR+. According to the company, the report is available at www.orosur.ca and via its SEDAR+ profile for review and download.

What are the important dates in OROXF's Anza Project 43-101 filing?

Key dates are effective date 16 January 2026 and issue date 25 March 2026. According to the company, the filing supports disclosures previously made on 10 February 2026.

How does the OROXF 43-101 filing affect Anza Project disclosure for shareholders?

The filing formalizes technical disclosure with a NI 43-101 compliant report, improving transparency for shareholders. According to the company, the report documents the Pepas maiden resource and supports prior public disclosures about Anza Project.

Will the OROXF 43-101 report change trading or regulatory status immediately?

The filing itself does not automatically change trading status or listings. According to the company, it constitutes public technical disclosure under NI 43-101 and makes inside information available through RIS and SEDAR+.