 VANCOUVER, BC, Sept. 3, 2021 PRNewswire - First Mining Gold Corp. First Mining or the Company TSX: FF OTCQX: FFMGF FRANKFURT: FMG announces that it has filed a preliminary short form base shelf prospectus the Preliminary Shelf Prospectus with the securities commissions in each of the provinces of Canada, and a corresponding registration statement on Form F-10 the Registration Statement with the United States Securities and Exchange Commission the SEC under the U.S.Canada Multijurisdictional Disclosure System. 