First Mining reports New High-Grade Gold Drill Intercepts from North Zone, South Zone, and Minuit Targets at its Duparquet Project

First Mining Gold Corp. is pleased to announce final results from the 2025 exploration drilling program at its Duparquet Gold Project located in the Abitibi region of Quebec, Canada. The results reported herein are from the newly discovered Minuit zone, as well as the North Zone and South Zone targets located along the margins of the Beattie syenite intrusion (Figure 1). Collectively, the recent drilling continues to demonstrate higher-grade gold mineralisation across multiple targets at the Duparquet Project, both along strike and at depth, supported by a geoscience-driven exploration strategy focused on delineating mineralisation along the main mineral resource contact zones.

Assay results from the North Zone drilling are highlighted by drill hole DUP25-056 which returned 15.14 g/t Au over 5.0 m, including 73.40 g/t Au over 1.0 m from 64.0 m to 69.0 m, within the existing resource, and 1.88 g/t Au over 16.9 m from 738.2 m to 755.10 m, as well as drill hole DUP25-063 which returned 1.51 g/t Au over 29.0 m from 279.0 m to 308.0 m and 2.97 g/t Au over 11.5 m from 639.5 m to 651.0 m. Assay highlights from the South Zone target include drill hole DUP25-061 returning 6.18 g/t Au over 2.95 m from 649.85 m to 652.8 m. Drill results from the Minuit Zone are highlighted by drill hole DUP25-070, which returned 9.87 g/t Au over 2.75 m from 513.7 m to 516.45 m, as well as drill hole DUP25-076, which returned 5.53 g/t Au over 5.3 m from 632.7 m to 638.0 m, including 19.6 g/t Au over 0.5 m from 632.7 m to 637.5 m.

“The results from our 2025 drilling program at the Duparquet Project continue to refine and strengthen our understanding of the mineralized system across the North Zone, South Zone and newly identified Minuit Zone targets,” stated Dan Wilton, CEO of First Mining. “These results continue to demonstrate strong resource growth potential and exploration opportunities along the syenite-mafic volcanic contact, which remain open along strike and at depth. We are very encouraged by our 2025 drilling program and look forward to announcing our follow-up plans in our 2026 program.”

The latest reported assays represent 4,329 m of drilling across 12 drill holes from a total of 16,577 m of drilling completed during the 2025 campaign. These holes were focused on demonstrating continuity along strike, identifying mineralisation controls, and extending target depths. Assay highlights are provided in Table 1, with a full list of assay results presented in Table 2. Drill collar details are provided in Table 3. All assay results from the 2025 drilling campaign have now been disclosed.

The Duparquet Project is situated in the southern part of the Abitibi Greenstone Belt and is geographically located approximately 50 km northwest of the city of Rouyn-Noranda. The Project benefits from easy access and proximity to an existing workforce and infrastructure, including road, rail and hydroelectric grid power. The Duparquet Project currently hosts an NI 43-101 compliant gold resource of 3.44 million ounces in the Measured & Indicated category, grading 1.55 g/t Au, and an additional 2.64 million ounces in the Inferred category, grading 1.62 g/t Au. First Mining completed a Preliminary Economic Assessment on the Project in 2023.

The Duparquet Project totals approximately 5,800 hectares focused on an area of 19 km of strike length along the prolific Destor-Porcupine Fault Zone, along with numerous mineralised splays and influential secondary lineaments. The Duparquet Project includes the past-producing Beattie, Donchester and Duquesne mines as well as the Central Duparquet, Dumico and Pitt Gold deposits.