First Mining Gold Corp. — Regulatory Filings 2021

Apr 15, 2021

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April 15, 2021

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

To: All Canadian Securities Regulatory Authorities

Subject: FIRST MINING GOLD 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 : May 03, 2021 Record Date for Voting (if applicable) : May 03, 2021 Beneficial Ownership Determination Date : May 03, 2021 Meeting Date : June 22, 2021 Meeting Location (if available) : VIRTUAL MEETING Issuer sending proxy related materials directly to NOBO: No Issuer paying for delivery to OBO: Yes

Notice and Access (NAA) Requirements:

NAA for Beneficial Holders Yes Beneficial Holders Stratification Criteria: Not Applicable NAA for Registered Holders Yes Registered Holders Stratification Criteria: Not Applicable

Voting Security Details:

Description

COMMON SHARES

CUSIP Number ISIN 320890106 CA3208901064

Sincerely,

Computershare

Agent for FIRST MINING GOLD CORP.