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

First Mining Gold Corp. announced continued drilling success at its Miroir discovery, part of the Duparquet Gold Project in Quebec. The highlight intercept from the latest batch of results is 2.01 g/t gold over a drill length of 29.8 meters in hole DUP25-078, starting near the surface at 18.0 meters. Other notable intercepts include 3.20 g/t gold over 15.75 meters in hole DUP25-077.

The results are from the completed 16,577-meter drill program for 2025. According to CEO Dan Wilton, these results extend the Miroir target up-dip in a shallow mineralization setting and demonstrate strong continuity, which adds optionality to potential development scenarios for the Duparquet project.

The news is materially positive. These results successfully build upon the September 24, 2025 announcement which featured a significant intercept of 3.23 g/t Au over 25.9 m at Miroir. While the grade in the headline hole of this release is lower, the intercept of 2.01 g/t Au over 29.8 m is still very strong, confirming both the grade and width potential of this new, near-surface discovery.

The key takeaway is the confirmation of continuity. Exploration is about building a coherent geological model and proving out a deposit's size and consistency. This release does exactly that for the Miroir zone. The shallow nature of these intercepts is particularly important as it supports the "optionality" mentioned by the CEO, likely referring to the potential for a higher-grade, near-surface starter pit that could significantly improve the economics outlined in the 2023 PEA.

From a strategic perspective, the company is executing its plan flawlessly. After securing over $36 million in financing in July/August 2025, they have aggressively drilled Duparquet and are consistently delivering positive results that expand mineralization beyond the known resource. The market has recognized this execution, with the stock price more than doubling from its post-financing levels. This news provides further validation for that rally and the company's exploration strategy. While not a "game-changer" discovery hole, it is a crucial and material step in proving up a new, valuable component of the Duparquet project.

First Mining Gold is a Canadian gold development company focused on advancing its portfolio of assets in North America. The company has two flagship projects: 1. Duparquet Gold Project: Located in the Abitibi region of Quebec, this is a PEA-stage project with a large existing resource (3.44 Moz M&I and 2.64 Moz Inferred as of the 2023 PEA). It is the subject of the recent aggressive exploration programs that are successfully identifying new zones of mineralization like Miroir, Aiguille, and Minuit. The company is systematically de-risking the project through drilling and community agreements (MOU with the City of Duparquet). 2. Springpole Gold Project: Located in Northwestern Ontario, this is one of Canada's largest undeveloped open-pit gold projects. It is more advanced than Duparquet, with a Feasibility Study underway and a Final Environmental Impact Statement (EIS) submitted in November 2024. The company has secured key agreements with local First Nations, significantly de-risking the project's path forward.