Orosur Mining Inc — AGM Information 2024

Oct 1, 2024

October 01, 2024

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510 Burrard St, 3rd Floor Vancouver BC, V6C 3B9 www.computershare.com

To: All Canadian Securities Regulatory Authorities

Subject: Orosur Mining Inc.

Dear Sir/Madam:

We advise of the following with respect to the upcoming Meeting of Security Holders for the subject Issuer:

Meeting Type : Annual General and Special Meeting Record Date for Notice of Meeting : October 15, 2024 Record Date for Voting (if applicable) : October 15, 2024 Beneficial Ownership Determination Date : October 15, 2024 Meeting Date : November 21, 2024 Meeting Location (if available) : London, UK Issuer sending proxy related materials directly to NOBO: Yes Issuer paying for delivery to OBO: No

Notice and Access (NAA) Requirements:

NAA for Beneficial Holders No NAA for Registered Holders No

Voting Security Details:

Description CUSIP Number ISIN COMMON 687196105 CA6871961059

Sincerely,

Computershare

Agent for Orosur Mining Inc.