First Mining Gold Corp. — Capital/Financing Update 2026

Jan 28, 2026

BC Securities Commission
Invest Right
1200-701 West Georgia Street
Vancouver, BC V7Y 1L2
www.bcsc.bc.ca
Phone 604 899 6500
Toll-free 1 800 373 6393
inquiries@bcsc.bc.ca

RECEIPT

First Mining Gold Corp.

This is the receipt of the British Columbia Securities Commission for the Preliminary Short Form Base Shelf Prospectus of the above Issuer dated January 27, 2026 (the preliminary prospectus).

This receipt also evidences that the Ontario Securities Commission has issued a receipt for the preliminary prospectus.

The preliminary prospectus has been filed under Multilateral Instrument 11-102 Passport System in Alberta, Saskatchewan, Manitoba, Quebec, New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland and Labrador, Yukon, Nunavut and Northwest Territories. A receipt for the preliminary prospectus is deemed to be issued by the regulator in each of those jurisdictions, if the conditions of the Instrument have been satisfied.

January 27, 2026

Larissa M. Streu
Larissa M. Streu
Manager, Corporate Disclosure
Corporate Finance

SEDAR+ Filing Number 6388441