Northwire Canada EditionThursday, October 15, 2026
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GOLD 4107.90 −1.7% SILVER 55.88 −6.1% COPPER 6.62 −1.6% OIL 95.09 +1.0% PALLADIUM 1096.50 −2.7% CIA 2.64 −0.4% BTO 7.09 −4.3% MCI 0.155 +0.0% CAN 0.065 +0.0% BLDS 0.335 +8.1% SAO 0.050 +0.0% SF 0.315 +0.0% BEA 0.055 −15.4% BMM 3.90 +11.1% AUGC 0.295 −13.2% MFG 3.34 −3.8% CDE 21.33 −7.7% CYG 0.160 −5.9% RSMX 0.100 −4.8% TUF 0.830 −5.7% GPG 0.285 −3.4% GOLD 4107.90 −1.7% SILVER 55.88 −6.1% COPPER 6.62 −1.6% OIL 95.09 +1.0% PALLADIUM 1096.50 −2.7% CIA 2.64 −0.4% BTO 7.09 −4.3% MCI 0.155 +0.0% CAN 0.065 +0.0% BLDS 0.335 +8.1% SAO 0.050 +0.0% SF 0.315 +0.0% BEA 0.055 −15.4% BMM 3.90 +11.1% AUGC 0.295 −13.2% MFG 3.34 −3.8% CDE 21.33 −7.7% CYG 0.160 −5.9% RSMX 0.100 −4.8% TUF 0.830 −5.7% GPG 0.285 −3.4%
Drill Results Neutral

Cosa Announces Commencement of Summer Drilling Program at the Darby Uranium Joint Venture with Denison Mines

Denison reports grades and widths at Darby while Phoenix construction remains on track despite near-term stock headwinds.

By The Northwire Desk — AI Analysis Sep 16, 2026 · 08:01 DML · 3.98 Denison Mines Corp.
Executive Summary

Cosa Resources Corp. announced the commencement of its summer drilling program at the Darby Uranium Joint Venture, a project in which it holds a 70% interest and Denison Mines Corp. holds a 30% interest. The fully funded initiative will comprise up to 2,500 metres of drilling targeting the Gamma and Bravo trends. The drilling aims to follow up on structural, alteration, and uranium geochemistry anomalies identified during the winter 2026 program, specifically hole DB24-41.

The company also confirmed it is finalizing plans for a 100% partner-funded drilling program at its Aurora project, which is expected to commence shortly. Cosa reports a cash position of $16 million, which is sufficient for the summer program and follow-up activities in 2027. QA/QC protocols, assay methodology, and historical data verification processes were detailed, with samples sent to SRC Geoanalytical Laboratories.

Material Impact

The announcement does not alter the company's core investment thesis, which remains heavily weighted toward the Phoenix ISR mine construction and its 2028 production target.

The news was fully telegraphed by prior announcements concerning Cosa's 2026 drilling plans and does not represent a material change in guidance, production, or financial outlook. Following the release, the market reacted with a price decline from approximately $4.60 in early September to $3.98 by mid-September, suggesting investors are discounting early-stage joint venture exploration in favor of near-term Phoenix construction milestones and broader sector dynamics.

DML · Price
Company Overview

Denison Mines Corp. is a uranium development and exploration company focused on the infrastructure-rich eastern Athabasca Basin in Saskatchewan. Its flagship asset is the Wheeler River Project, in which it holds a 95% effective interest, comprising the Phoenix (ISR) and Gryphon (underground) deposits. The company also holds operating assets, including a 22.5% interest in the McClean Lake Mill & Mines, which includes toll milling for Cigar Lake and SABRE mining at McClean North.

Other interests include a 25.17% stake in the Midwest Project and a 70.55% interest in the Waterbury Lake Project. Additionally, Denison holds strategic interests via Joint Canada Uranium (JCU) in Millennium and Kiggavik. The company maintains strategic joint ventures with Cosa Resources, Skyharbour Resources, Foremost Clean Energy, and F3 Uranium.

Read the original news release →

More from Denison Mines Corp.

Oct 07, 2026 · 17:17

Denison’s JV partner drill start signals continued exploration momentum, but execution risk remains on flagship Phoenix.

Drill Results Sep 14, 2026 · 08:01

Denison’s Phoenix project drives value while Cosa’s MLN CPS-only update remains non-material.

Drill Results Aug 12, 2026 · 16:28

Denison’s Phoenix construction derisking and physical uranium sales fund capital expenditures without dilution.

Production / Operations Aug 04, 2026 · 08:01

Denison advances Phoenix construction and JV partner exploration at zero cost.

Drill Results Jul 28, 2026 · 06:30

Denison begins full-scale construction of Canada’s first new uranium mine in twenty years, targeting mid-2028 yellowcake production.

Production / Operations Jul 15, 2026 · 08:01

Denison’s Phoenix construction remains on track following final investment decision, while Cosa share settlement confirms joint venture execution.

M&A / Property