Magna Mining Inc. — Proxy Solicitation & Information Statement 2024

May 23, 2024

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Date: May 23, 2024

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

To: All Canadian Securities Regulatory Authorities

Subject: MAGNA MINING INC. (AMENDED – SEE THE HIGHLIGHTED)

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 : May 16, 2024 Record Date for Voting (if applicable) : May 16, 2024 Beneficial Ownership Determination Date : May 16, 2024 Meeting Date : June 28, 2024 Meeting Location (if available) : Sudbury, On 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 CLASS 55925F102 CA55925F1027

Sincerely,

Computershare

Agent for MAGNA MINING INC.