lAMGOLD Reports Mineral Resources and Reserves for the Year Ended 2025

Core Viewpoint - IAMGOLD Corporation has released its updated Mineral Resources and Mineral Reserves statement as of December 31, 2025, highlighting significant growth in Measured and Indicated Resources and ongoing exploration efforts across its projects, particularly in Canada [1][3]. Mineral Resources - IAMGOLD's Measured and Indicated Mineral Resources increased by 16% to 31 million ounces, with 24.6 million ounces attributable [8][10]. - The increase was primarily due to the conversion of Inferred Mineral Resources at the Gosselin and Nelligan deposits, along with the inclusion of Philibert and Chevrier deposits from the Northern Superior transaction [10][12]. - Global Inferred Mineral Resources decreased by 2% to 12.5 million ounces [10][12]. Mineral Reserves - Proven and Probable Mineral Reserves totaled 9.9 million ounces, a decrease of 7% from the previous year, mainly due to depletion at Côté Gold and Essakane [8][9]. - Côté Gold's Mineral Reserves decreased by 301,000 ounces, while Westwood's reserves increased due to a change in resource model and higher gold price assumptions [9][10]. - The total Proven and Probable Mineral Reserves were estimated at 279.6 million tonnes at an average grade of 1.10 g/t Au [8][21]. Project Highlights - Côté Gold is a focal point for IAMGOLD, with plans for a technical report in Q4 2026 that will outline a mine plan incorporating both Côté and Gosselin pits [3][13]. - At Westwood, exploration activities are aimed at expanding the mine in the eastern parts, while Essakane's Mineral Resource tonnes increased by 50%, indicating potential for mine life extension [3][14]. - The Nelligan Mining Complex is set for a $24 million exploration budget to expand mineralized footprints and test high-priority targets [20][19]. Financial Assumptions - The gold price assumptions for estimating Mineral Reserves were updated to $2,000 per ounce for Westwood and Essakane, and $1,700 per ounce for Côté Gold [5][11]. - For Mineral Resources, the gold price was set at $2,500 per ounce for several projects, reflecting an increase from previous estimates [11][22].