FIRST MNG GOLD CORP.

Toronto, Ontario--(Newsfile Corp. - July 16, 2025) - CEO.CA ("CEO.CA"), the leading investor social network in venture stocks, shares exclusive updates with CEOs and executives from around the globe. Founded in 2012, CEO.CA, a wholly owned subsidiary of EarthLabs, Inc. , is one of the most popular free financial websites and apps in Canada and for investors globally – with industry leading audience engagement and mobile functionality.» Mehr auf newsfilecorp.com

NOT FOR DISTRIBUTION TO UNITED STATES NEWS WIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES Base Shelf Prospectus Accessible and Prospectus Supplement to be Accessible on SEDAR+ VANCOUVER, British Columbia, July 14, 2025 (GLOBE NEWSWIRE) -- First Mining Gold Corp. (“First Mining” or the “Company”) (TSX: FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce that it has entered into an agreement with Haywood Securities Inc., on behalf of a syndicate of agents (collectively, the "Agents"), in connection with a commercially reasonable efforts, public offering of up to 27,800,000 units of the Company (the “Units”) at a price of $0.18 per Unit (the “Unit Offering Price”) for aggregate gross proceeds to the Company of up to $5,004,000 (the “Public Offering”). Each Unit will consist of one common share of the Company (a “Unit Share”) and one-half of one common share purchase warrant (each whole common share purchase warrant, a “Warrant”).» Mehr auf globenewswire.com

Minuit Discovery – A Newly Discovered Gold Zone located 75 m north of historical Donchester Mine DUP25-059 returns 2.25 g/t Au over 12.8 m, including 4.08 g/t Au over 4.0 m Zone 3 Exploration Update – Drilling continues to confirm the main Duparquet resource DUP25-059 intersects 1.21 g/t Au over 60.2 m including 4.1 g/t Au over 4.3 m VANCOUVER, BC , July 14, 2025 /PRNewswire/ - First Mining Gold Corp. ("First Mining" or the "Company") (TSX: FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce additional drilling results from the 2025 drilling program at its Duparquet Gold Project ("Duparquet Project" or the "Project") located in the Abitibi region of Quebec, Canada. The Company has been actively drilling with two drill rigs on the Duparquet Project since March 2025 as part of an estimated 18,000 m of drilling this year.» Mehr auf prnewswire.com