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Cosa Resources – Winter Drilling Has Commenced At Darby Project, With Murphy Lake North To Follow

The KE Report Feb 3, 2026

Summary

Cosa Resources has begun ~2,500m of winter drilling at its Darby uranium project in the Athabasca Basin, a 70/30 JV with Denison Mines.

Four priority targets came out of relogging historic core, chasing sandstone-alteration signatures near graphitic basement faults.

Murphy Lake North drilling (~1,200m) follows in March, filling a 1,200m gap along the Cyclone trend from 2025.

Targets sit at 500-650m depth near Cigar Lake; management argues Cosa tight share structure could amplify a discovery re-rate.