First Mining Announces Updated Pre-Feasibility Study for the Springpole Gold Project, Ontario, Canada

First Mining Gold announced the results of an updated Pre-Feasibility Study (PFS) for its 100%-owned Springpole Gold Project in Ontario, Canada on November 18, 2025. The study outlines a 30,000 tonnes-per-day open-pit mining operation.

Key economic highlights from the PFS, based on a gold price of US$3,100/oz and a silver price of US$35/oz, include: - After-Tax Net Present Value (NPV) at a 5% discount rate of US$2.1 billion. - After-Tax Internal Rate of Return (IRR) of 41%. - Initial Capital Cost (CAPEX) of US$1.104 billion. - Average annual gold production of 330,000 ounces over the first five years. - Life of Mine (LOM) of 9.4 years. - All-In Sustaining Costs (AISC) of US$877/oz over the first five years. - Probable Mineral Reserves of 3.1 million ounces of gold.

The updated PFS incorporates significant engineering and design changes since the 2021 PFS, including an advanced tailings and mine rock management strategy, which the company has carried through the Environmental Assessment process.

The updated PFS for the Springpole project is a material and positive development, representing a significant de-risking milestone. The study presents robust project economics with a high NPV and IRR, reinforcing Springpole's status as a large, undeveloped gold project in a top-tier jurisdiction. Reviewing the historical news, this PFS is the culmination of years of work on permitting, exploration, and community agreements, such as the Long Term Relationship Agreement with Mishkeegogamang First Nation announced in July 2025.

However, a critical assessment reveals two substantial risks that temper the headline numbers:

1. Aggressive Gold Price Assumption: The base case uses a US$3,100/oz gold price. This is significantly above current and historical gold prices and presents the project in the most favourable light possible. While gold prices have been strong, relying on such a high price for a base case is a major red flag. The project's sensitivity to lower, more realistic gold prices will be the true test of its economic viability. Without that sensitivity analysis provided, the headline NPV and IRR figures should be viewed with extreme caution.

2. Unfunded CAPEX: The initial capital cost of US$1.104 billion is a massive hurdle for a company with a market capitalization of under CAD$500 million and a cash position of CAD$37.6 million (as of Sept 30, 2025). The company has no clear path to financing this amount. Funding will likely require a combination of a joint venture partner, significant debt, and substantial equity issuance, leading to massive shareholder dilution.

The market appears to have anticipated this positive news, with the stock price rallying from CAD$0.17 in mid-July to a high of CAD$0.38 just before the announcement. This run-up was supported by a series of positive drill results from the company's other key asset, the Duparquet Gold Project, and the successful completion of a CAD$36.4 million financing in July and August 2025.

In conclusion, while the PFS improves the technical and economic profile of Springpole, the aggressive commodity price assumptions and the enormous, unfunded CAPEX remain critical risks. The news confirms the project's potential but also highlights the long and difficult road ahead to financing and construction.

First Mining Gold Corp. is a Canadian gold development company focused on advancing its portfolio of assets in North America. The company's flagship asset is the Springpole Gold Project in northwestern Ontario. Springpole is one of Canada's largest undeveloped open-pit gold projects. The most recent PFS (Nov 2025) outlines a 9.4-year mine life with average annual production of 330,000 ounces of gold for the first five years. The company is currently advancing the project through the environmental assessment and permitting process while working towards a Feasibility Study. Its secondary key asset is the Duparquet Gold Project in Quebec, a PEA-stage project where the company is actively exploring to expand the existing large resource.