Cosa Resources reports promising uranium drilling results at Darby project in Athabasca Basin

Cosa Resources Corp. announced positive drilling results at its Darby uranium project in Saskatchewan's Athabasca Basin, a joint venture with Denison Mines. The winter 2026 drilling program revealed highly anomalous uranium in sandstone and weak basement mineralization, significantly upgrading multiple exploration trends, especially at the Charlie and Gamma trends. The Gamma trend showed a wide graphitic structural corridor with strong sandstone alteration, making it a high priority for further exploration. Assays from the Murphy Lake North drill program remain pending, with plans for a significant summer drilling campaign at both Murphy Lake North and Darby expected to start after June. These results enhance Cosa's uranium exploration potential in a prolific mining region.