First Mining Gold Corp. — Capital/Financing Update 2020

May 7, 2020

FIRST MINING GOLD CORP.

NOTICE OF DISTRIBUTION OF COMMON SHARES PURSUANT TO AN AT-THE-MARKET OFFERING

To: British Columbia Securities Commission Ontario Securities Commission Alberta Securities Commission Financial and Consumer Affairs Authority of Saskatchewan, Securities Division The Manitoba Securities Commission Autorité des marches financiers (Québec) Financial and Consumer Services Commission (New Brunswick) Nova Scotia Securities Commission Office of the Superintendent of Securities, Prince Edward Island Office of the Superintendent of Securities, Newfoundland and Labrador

Reference is made to the decision of the British Columbia Securities Commission dated August 13, 2019, in the matter of First Mining Gold Corp. (the “ Corporation ”) and Cantor Fitzgerald Canada Corporation (the “ Agent ”) (the “ Decision ”). Reference is also made to the Corporation’s at-the-market offering (the “ ATM Offering ”) of up to $15,000,000 worth of common shares of the Corporation (the “ Common Shares ”) established by a prospectus supplement dated August 19, 2019 to the Corporation’s short form base shelf prospectus dated June 24, 2019.

In accordance with paragraph 23 of the Decision, the undersigned, being the Chief Executive Officer of the Corporation, hereby confirms, for an on behalf of the Corporation and not in his personal capacity, that the following Common Shares were distributed over the facilities of the Toronto Stock Exchange or another “marketplace” (as such term is defined in NI 21-101 Market Operations ) in Canada pursuant to the ATM Offering during the month ended April 30, 2020 (the “ Month ”).

he ATM Offering during the month ended April 30, 2020 (the “Month”).
Aggregate Number of Common Shares Distributed during the Month	532,000
Average Sale Price of Common Shares Distributed during the Month	$0.24
Gross Proceeds Realized from Sales of Common Shares during the Month	$128,866.20
Total Commission Paid in respect of Sales of Common Shares during the Month	$3,865.99
Net Proceeds Realized from Sales of Common Shares during the Month	$125,000.21

DATED this 6[th ] day of May, 2020.

FIRST MINING GOLD CORP.

By: (signed) “Daniel W. Wilton” Name: Daniel W. Wilton Title: Chief Executive Officer