Toronto, Ontario — February 17, 2026 — Leads & Copy —
IAMGOLD Corporation (NYSE: IAG) (TSX: IMG) has released its updated Mineral Resources and Mineral Reserves statement as of Dec. 31, 2025. The statement was prepared in accordance with National Instrument 43-101.
Proven and Probable Mineral Reserves total 9.9 million ounces of gold in 279.6 Mt at 1.10 g/t Au (7.5 million ounces attributable). The company said P&P Mineral Reserves decreased 7%, or 796,000 ounces, from the year prior, primarily due to depletion at Côté Gold and Essakane partially offset by an increase in Mineral Reserves at Westwood.
Measured and Indicated Mineral Resources increased 16% to 31.0 million ounces of gold in 1.0 Bt at 0.94 g/t Au (24.6 million ounces attributable). The increase was primarily associated with the conversion of Inferred Mineral Resources in the Gosselin deposit at Côté Gold and Nelligan deposit, coupled with the inclusion of the Philibert and Chevrier deposits as part of the Northern Superior transaction towards the end of the year.
Côté Gold (Côté and Gosselin) M&I Mineral Resources, inclusive of Mineral Reserves and on a 100% basis, increased 12%, or approximately 2.0 million ounces, to an estimated 18.2 million ounces (12.7 million ounces attributable) as of December 31, 2025. Inferred Mineral Resources decreased approximately 2.0 million ounces to 2.2 million ounces.
Essakane M&I Mineral Resources (excluding Gossey), inclusive of Mineral Reserves and on a 100% basis, increased 11% to an estimated 4.4 million ounces (3.8 million ounces attributable) as of December 31, 2025, with a 50% increase in tonnes (to 150 Mt) offsetting a 26% decrease in grades (to 0.91 g/t Au, including stockpiles). The increase in tonnes and ounces underscores confidence in the potential for Essakane to extend its mine life within the fence beyond current guidance.
Westwood M&I Mineral Resources, inclusive of Mineral Reserves, increased 682,000 ounces to 2.4 million ounces as of December 31, 2025, with a 79% increase in tonnes (to 11.9 Mt) offsetting a 22% decrease in average grade to 6.24 g/t Au.
Inferred Mineral Resources decreased 2% to 12.5 million ounces (11.3 million ounces attributable).
IAMGOLD President and CEO Renaud Adams said the company has 31 million ounces in Measured and Indicated Resources along with an additional 12.5 million ounces of Inferred Mineral Resources. Adams added that approximately 80% of the company’s Measured and Indicated ounces and 90% of global Inferred ounces are located in Canada.
Gold price assumptions for Mineral Reserves were updated to $2,000 per ounce for Westwood (including Grand Duc) and Essakane; and $1,700 per ounce for Côté Gold. 2025 Mineral Resources were updated using a gold price of: $2,500 per ounce for Essakane, Westwood (incl. Grand Duc), Nelligan, Monster Lake and Gossey; and $2,100/oz for Côté.
According to the release, this year all eyes will be on Côté Gold, as exploration and site teams are working towards the technical report to be delivered in the fourth quarter which will outline a mine plan incorporating a plant expansion that will leverage a larger subset of ounces from the combined Côté and Gosselin pits. At Westwood, exploration activities will be conducted to support the study of options to expand the mine in the eastern parts of Westwood underground that could be potentially amenable to bulk mining. Additional extensions to the Grand Duc pit will also be investigated this year. At Essakane, the Mineral Resource tonnes increased 50% building confidence in the potential for the project to see a mine life extension beyond the current mine plan.
IAMGOLD has outlined a budget of approximately $24 million for exploration activities within the Nelligan Mining Complex. The program will be to conduct thorough testing of Philibert, expand Nelligan and continue to test Monster Lake at depth all in support of a conceptual preliminary economic assessment in 2027. Further, the Company is eager to test high priority targets within the region.
Proven and Probable Mineral Reserves, on a 100% basis for current assets, were estimated at 9.9 million ounces of gold as of December 31, 2025, which was a 7% decrease from the year prior. At Côté Gold, Mineral Reserves decreased 301,000 ounces from the prior year period as updated estimates partially offset depletion. At Westwood, Mineral Reserves from the underground increased 125,000 ounces and 20,000 ounces from the Grand Duc open pit, more than offsetting depletion, primarily as a result of the change in resource model and increased gold price assumption and reduction in the underground cut-off grade to 6.40 g/t Au. At Essakane, Mineral Reserves decreased 640,000 ounces, primarily due to depletion and geology model adjustments as mining activities continue to progress through the mine plan.
Measured and Indicated Mineral Resources, inclusive of Mineral Reserves and on a 100% basis, for IAMGOLD’s assets increased 16% or 4.3 million ounces, for a total of 31.0 million ounces as of December 31, 2025. The increase was primarily associated with the upgrading of Mineral Resources at Côté Gold, Westwood and Nelligan, coupled with the acquisition of the Philibert and Chevrier deposits as part of the Northern Superior transaction towards the end of the year. Global Inferred Mineral Resources (on a 100% basis) decreased 2%, or 0.3 million ounces, to a total of 12.5 million ounces as of December 31, 2025.
The company assumed a gold price of $2,500 per ounce for estimating Mineral Resources as of December 31, 2025 at Essakane, Westwood Complex, Gosselin, Nelligan and Monster Lake. The gold price assumption for Côté Gold was $2,100 per ounce.
Westwood M&I Mineral Resources, inclusive of Mineral Reserves, increased 682,000 ounces to 2.4 million ounces as of December 31, 2025, with a 79% increase in tonnes offsetting a 22% decrease in average grade.
The Nelligan Mining Complex encompasses the Nelligan, Philibert, Chevrier, and Monster Lake deposits. On a consolidated basis, the Nelligan Mining Complex reported a significant increase in Indicated and Inferred Mineral Resources. Indicated Resources increased 1.1 million ounces to a total of 4.3 million ounces. Inferred ounces increased 1.9 million ounces to a total of 7.5 million ounces. The Nelligan deposit reported an increase of 575,000 ounces in Indicated Mineral Resources, to a total of 3.7 million ounces. The increase was primarily a result of the infill program conducted last year to increase the confidence in ounces from Inferred Mineral Resources.
IAMGOLD is an intermediate gold producer and developer based in Canada with operating mines in North America and West Africa, including Côté Gold (Canada), Westwood (Canada) and Essakane (Burkina Faso).
All amounts are in US dollars, unless otherwise indicated. Measured and indicated resources are quoted inclusive of proven and probable reserves for all sites.
Source: IAMGOLD
