Rio Silver Inc. — Proxy Solicitation & Information Statement 2022

Jul 14, 2022

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

July 14, 2022

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To: All Canadian Securities Regulatory Authorities

Subject: RIO SILVER 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 : July 27, 2022 Record Date for Voting (if applicable) : July 27, 2022 Beneficial Ownership Determination Date : July 27, 2022 Meeting Date : August 29, 2022 Meeting Location (if available) : Vancouver, BC Issuer sending proxy related materials directly to NOBO: No 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 SHARES 76721A204 CA76721A2048

Sincerely,

Computershare Agent for RIO SILVER INC.