First Mining Gold Corp.

First Mining Gold Added to VanEck Junior Gold Miners GDXJ Index

Vancouver – September 17, 2026 -- First Mining Gold Corp. (TSX: FF; OTCQX: FFMGF; FRANKFURT: FMG) will join the MVIS Global Junior Gold Miners Index (MVGDXJ), the benchmark tracked by the VanEck Junior Gold Miners ETF (GDXJ), effective at the close of trading on September 18, 2026.

Index inclusion follows semi-annual GDXJ rebalancing

The addition comes through the MVGDXJ's scheduled semi-annual review, placing First Mining among the most liquid small-cap gold and silver mining, development and exploration companies tracked globally. The MVGDXJ is a modified market-cap-weighted index restricted to companies generating at least 50% of revenue from gold or silver, or holding at least 50% of mineral resources in those metals.

First Mining Reports High-Grade Gold Hits at Duparquet's Miroir Zone

Vancouver – September 15, 2026 -- First Mining Gold Corp. (TSX: FF; OTCQX: FFMGF; FRANKFURT: FMG) has reported new high-grade gold intercepts from its 2026 drilling program at the Miroir target within the Duparquet Gold Project in Quebec's Abitibi region, extending the known mineralized strike length to approximately 220 metres from 150 metres in 2025.

Drill hole DUP26-093 returns 5.26 g/t gold over 19.55 metres

The intercept, from 182.0 m to 201.55 m depth, included 7.58 g/t Au over 12.95 m and a higher-grade section of 21.80 g/t Au over 1.0 m. Drill hole DUP26-096 returned 3.43 g/t Au over 28.0 m from 234.35 m to 262.35 m, including 10.36 g/t Au over 7.2 m, plus a secondary zone of 2.99 g/t Au over 4.6 m and 4.90 g/t Au over 2.7 m.