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IAMGOLD has consolidated the Côté and Gosselin zones at its Côté Gold mine in Ontario into a single resource framework, taking the operation's measured and indicated resources to roughly 20.3 million ounces of gold and inferred resources to about 3.5 million ounces.
Within the consolidated model, the Côté zone holds 12.7 million ounces of measured and indicated resources on a 100% basis (inclusive of mineral reserves), up 1.5 million ounces, or 13%, from the previous estimate dated December 31, 2025. The neighbouring Gosselin zone holds 7.4 million indicated ounces, up 0.6 million ounces or 8%. The newly integrated saddle area between the two zones contributes an additional 0.2 million indicated ounces.
The inferred category also moved meaningfully. Côté inferred resources rose to 2.0 million ounces, up 0.8 million ounces or 63%, while Gosselin inferred resources slipped slightly to 0.9 million ounces, down 0.1 million ounces. The consolidated model also added 0.6 million new inferred ounces in the saddle area.
"This updated mineral resource estimate combines the Côté and Gosselin zones within a single geological framework, an important technical milestone as we move toward the expansion study and updated mine plan expected in the fourth quarter," said president and CEO Renaud Adams. "Our teams have done an excellent job building confidence in the resource through the 2025 drilling programs, and we are encouraged with the continued growth and conversion of ounces. As previously communicated to the market, the year-end technical report and mine plan will assess an expansion of the Côté Gold mine that brings the consolidated Côté and Gosselin zones into an integrated mine plan."
The updated estimate uses a gold price of US$2,500 per ounce — up from US$2,100 for Côté and unchanged from US$2,500 for Gosselin in the previous statement — and a consolidated cut-off grade of 0.25 g/t gold, down from 0.30 g/t previously. Resources are constrained within an optimized open-pit shell.
The new figures will feed into the Côté Gold Technical Report and mine plan, still on track for release in the fourth quarter of 2026. That work is expected to evaluate a plant expansion and a larger-scale mining scenario that integrates both zones. IAMGOLD has also planned a 30,000-metre diamond drilling program at Côté Gold for 2026, aimed at infilling and continuing to test the mineralized envelope for further updates in 2027.
The estimate was prepared by SLR Consulting (Canada) Ltd. under NI 43-101.