Investor Presentaiton

DUPARQUET PEA CASH FLOW PROFILE Strong free cash flow generation at US$1,800/oz Au Over C$1.1 billion net free cash flow generated during LOM Cash Flow (C$M) $300 $200 $100 $0 ($100) ($200) Duparquet Cash Flow Profile G FIRST MINING GOLD $220 $203 $102 $114 $117 $152 $150 $167 $163 $184 $57 $85 ($99) ($490) ($300) ($400) ($500) -1 -2 1 2 3 4 5 6 7 8 9 10 11 12 Production Year Note: Further details can be found in the technical report titled "NI 43-101 Technical Report: Preliminary Economic Assessment, Duparquet Project, Quebec, Canada", dated October 20, 2023, as filed on SEDAR+ and on www.firstmininggold.com TSX: FF | OTCQX: FFMGF | FRANKFURT: FMG | www.firstmininggold.com | 49

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