Orestone Mining — Proxy Solicitation & Information Statement 2023

Feb 28, 2023

==> picture [98 x 20] intentionally omitted <==

February 28, 2023 AMENDED - SEE HIGHLIGHTED

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

To: All Canadian Securities Regulatory Authorities Subject: ORESTONE MINING CORP

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 : March 21, 2023 Record Date for Voting (if applicable) : March 21, 2023 Beneficial Ownership Determination Date : March 21, 2023 Meeting Date : April 27, 2023 Meeting Location (if available) : Vancouver, BC 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 NAA for Registered Holders

Voting Security Details:

Description CUSIP Number ISIN COMMON SHARES 686154303 CA6861543032

Sincerely,

Computershare

Agent for ORESTONE MINING CORP