Cosa Returns to Darby With a Fully Funded 2,500-Metre Uranium Drill Program

Darby is back in the active drill queue

Cosa Resources has started drilling at the Darby uranium project in Saskatchewan’s eastern Athabasca Basin, bringing another joint-venture program with Denison Mines into active testing. Cosa operates Darby with a 70% interest, while Denison holds 30%.

The summer plan calls for up to 2,500 metres of drilling across the Gamma and Bravo trends. Cosa says the work is fully funded, giving the team room to follow the geological plan without needing to pause the current campaign for financing.

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Gamma and Bravo enter the program with different evidence

At Gamma, the new holes are designed to build on Cosa’s winter 2026 drilling, where the company reported a broad structural corridor, significant unconformity relief, alteration and elevated uranium geochemistry. Those features give the summer program a defined vector to follow rather than simply repeating regional reconnaissance.

Bravo brings a separate body of evidence. Historical drilling intersected structure, alteration and uranium mineralization, and Cosa interprets the trend within a magnetic low that extends toward the Cigar Lake area. The summer campaign can therefore test two target corridors that were upgraded for different reasons, improving the amount of geological information generated by the same program.

The Denison relationship adds continuity to the exploration strategy

Darby is one part of a broader relationship between Cosa and Denison. Cosa’s 2026 work has also included drilling at the Murphy Lake North joint venture, and management has described both projects as core priorities for the remainder of the year.

That structure gives Cosa a concentrated exploration story in one of the world’s best-known uranium districts. Instead of spreading the season across unrelated jurisdictions, the company is applying its technical team to multiple targets inside the Athabasca Basin and carrying information from one campaign into the next.

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A strong treasury gives the next drilling decisions more flexibility

Cosa reported approximately C$16 million in treasury alongside the Darby update and said it is funded for the summer campaign and follow-up work in 2027. That financial position is useful in exploration because encouraging technical results can be acted on more quickly when capital for additional work is already available.

For Darby, the immediate focus is simple: test the upgraded Gamma and Bravo trends and see whether the structural, alteration and geochemical indicators strengthen with drilling. The program now underway gives Cosa another chance to convert a large regional opportunity into specific subsurface evidence.