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PROJECT ECONOMICS OFFERS SIGNIFINCANT LEVERAGE TO GOLD PRICE Unparalleled fundamental value leverage to an increasing gold price G FIRST MINING GOLD SPRINGPOLE DUPARQUET Economic Sensitivity to Gold Price based on PFS Economic Sensitivity to Gold Price based on PEA Pre-Tax Pre-Tax After-Tax Gold Price NPV 5% IRR NPV 5% After-Tax IRR Pre-Tax Pre-Tax After-Tax After-Tax Gold Price NPV 5% IRR NPV 5% IRR US$/oz US$mm % US$mm % US$/oz C$mm % C$mm % $1,400 $1,042 28.9% $690 23.3% $1,600 $621 17.1% $310 12.1% $1,600 $1,482 36.4% $995 29.4% $1,800 $1,070 24.9% $588 18.0% $1,800 $1,921 43.2% $1,297 35.0% $2,000 $1,530 32.0% $859 23.2% $2,000 $2,361 49.5% $1,599 40.1% $2,200 $1,980 38.6% $1,120 28.0% Each US$100/oz movement in gold price adds US$250M in fundamental net asset value to our projects! Source: Springpole 2021 PFS and Duparquet 2023 PEA TSX: FF | OTCQX: FFMGF | FRANKFURT: FMG | www.firstmininggold.com | 12

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