• Secured 532km2 of new ground in southwest Siguiri Basin
• Identified 9km-long active artisanal gold mining zone at Koba Project
• Exploring across more than 1,000km2 with BLEG, soil sampling, and infill soil sampling

During the March 2026 Quarter, DeSoto continued to consolidate its strategic ground position in the Siguiri Basin, acquiring an additional 532km2 through an agreement with United Mining SARL. This increased DeSoto's contiguous project area in the southwest to 687km2. At the Koba Project in the south-central Siguiri, initial field reconnaissance identified a significant 9km-long zone of active artisanal workings up to 1km wide. Dump sampling returned high-grade assays up to 15.2g/t Au, prompting DeSoto to complete an initial soil geochemistry program to define priority drill targets. Across DeSoto's broader south-central project grouping, the Company recommenced exploration with BLEG sampling, soil sampling and power auger drilling on 11 permits, including at the Dadjan and Tolé Projects, following up on maiden drilling that confirmed a large gold system. Systematic exploration also continued at the Timbakouna Project, where DeSoto is conducting permit-wide soil sampling on a 200m x 200m grid to generate targets. During the quarter, DeSoto maintained an active presence across its extensive portfolio to ensure good standing of its permits, with additional acquisitions and applications growing the 100%-owned project pipeline to 25 permits spanning over 1,900km2.