IAMGOLD Corporation (NYSE: IAG)b announced an updated mineral resource estimate for its Côté Gold Mine in Ontario, Canada, showing a consolidated total of 20.3 million ounces of gold in measured and indicated categories, representing a 12% increase from its December 31, 2025 statement.

The updated estimate, effective March 31, 2026, integrates the Côté and Gosselin zones into a consolidated block model. The Côté zone contains 12.7 million ounces in measured and indicated resources, up 13% from the prior estimate, while the Gosselin zone holds 7.4 million ounces, an 8% increase.

Inferred mineral resources totaled 3.5 million ounces, representing a 61% increase from the previous statement. The Côté zone contributed 2.0 million ounces of inferred resources, up 63%, while Gosselin added 0.9 million ounces, down 7%.

The estimate incorporates updated economic assumptions including a gold price of $2,500 per ounce, up from $2,100 per ounce for Côté in the previous statement, and a cut-off grade of 0.25 grams per tonne gold, down from 0.30 grams per tonne previously.

The consolidation allowed for increased delineation of the saddle area between the two zones, adding 0.2 million ounces of indicated resources and 0.6 million ounces of inferred resources in this connecting area.

IAMGOLD operates Côté Gold in a 70-30 joint venture with Sumitomo Metal Mining Co. Ltd. The company's attributable share of the measured and indicated resources is 14.24 million ounces.

The updated estimate will inform an upcoming technical report and mine plan expected in the fourth quarter of 2026, which will evaluate a plant expansion and larger-scale mining scenario targeting the consolidated resource model.

IAMGOLD plans an additional 30,000-meter diamond drilling program for 2026, aimed at infilling and testing the potential to expand the mineralized envelope for 2027.