First Mining Reports Continued Drilling Success at its Miroir Discovery with 2.01 g/t Au over 29.8 m

Core Viewpoint - First Mining Gold Corp. announced positive results from its 2025 exploration drilling program at the Duparquet Gold Project in Quebec, Canada, indicating significant gold grades in the drill results [1] Summary by Relevant Sections Exploration Results - Drill hole DUP25-077 returned 3.20 g/t Au over 15.75 m, with notable intervals of 5.21 g/t Au over 8.65 m and 22.50 g/t Au over 0.7 m [1] - Drill hole DUP25-078 returned 2.01 g/t Au over 29.80 m, including significant grades of 15.70 g/t Au over 0.75 m and 18.20 g/t Au over 1.0 m [1] Drilling Program Details - The 2025 drilling program at the Duparquet Project was completed in October, totaling 16,577 m of drilling [1]