Orosur Mining Inc - Notification of Investor Q&A Session

Orosur Mining Inc. -Notice of Annual and Special Meeting

LONDON, November 21, 2025 - Orosur Mining Inc. ("Orosur" or "the Company") (TSX-V:OMI)(AIM:OMI) the minerals explorer and developer currently operating in Colombia and Argentina announces that copies of the Company's Notice of Annual and Special Meeting ("AGM"), including the Management Information Circular and proxy forms have been posted to shareholders. Copies are also available on the website at: https://www.orosur.ca

A link to the PDF version of the Notice of AGM is also available here: http://www.rns-pdf.londonstockexchange.com/rns/4570I_1-2025-11-20.pdf

The AGM will be held on 17 ^th December 2025 at 12.30pm GMT (UK local time) at the offices of SP Angel Corporate Finance LLP, Prince Frederick House, 35-39 Maddox Street, London, W1S 2PP, England. Shareholders are strongly encouraged by the Board to vote by proxy by completing their form of proxy in accordance with the instructions on the proxy form.

Notification of Investor Q&A Session

Orosur is also pleased to announce that the day following the AGM, 18 ^th December 2025, Louis Castro, Executive Chairman, and Brad George, the Company's CEO, will be holding a live Investor Q&A session via the Investor Meet Company platform at 5.30pm GMT.

The presentation is open to all existing and potential shareholders. Questions can be submitted pre-event via your Investor Meet Company dashboard up until 1pm GMT the day before Investor Q&A session (17 ^th December) or at any time during the live presentation.

Investors can sign up to Investor Meet Company for free and add to meet the Company via:

https://www.investormeetcompany.com/orosur-mining-inc/register-investor

Investors who already follow Orosur on the Investor Meet Company platform will automatically be invited.

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/James Pope
Tel: +44 (0)20 3657 0050

Flagstaff Communications and Investor Communications

Tim Thompson
Mark Edwards
Fergus 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.

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