Each one in plain English, with the numbers worked through for a shareholder.
10 Oct 2025resource reserve update▲ GoodMajor
An economic assessment of the Midwest deposit by in-situ recovery, effective 6 August 2025: on a whole-project basis and at US$80 a pound uranium, an after-tax value of C$964 million at an 8% discount, an 82.7% return and payback inside a year. Midwest was a conventional open-pit project for decades; the in-situ method is what makes it look like this.
The Wheeler River technical report effective 23 June 2023 puts the Phoenix in-situ recovery project at an after-tax value of $1.43 billion at an 8% discount, an 82.3% return and an eleven-month payback - a step up from the 2018 pre-feasibility figures, driven by the in-situ recovery design and higher uranium prices.
Filed the technical report for the Christie Lake uranium project, effective 31 December 2021, prepared for UEX Corporation and JCU (Canada) Exploration, which hold 50% each. Denison's exposure runs through its interest in JCU, the same third partner that held a right of first refusal over Cameco's Wheeler River stake in 2018.
An economic assessment of the Tthe Heldeth Tue (J Zone) deposit at Waterbury Lake, effective 30 October 2020, using in-situ recovery: base case pre-tax value of $177.3 million at an 8% discount, a 39.1% return and payback in about 22 months. At $35 a pound uranium the same project is worth $38.3 million and returns 17.4% - the study's own low case shows how much of the value is the uranium price.
Filed the pre-feasibility study for the now 90%-owned Wheeler River: 109.4 million lb of uranium oxide over a 14-year life, pre-tax net present value of $1.31 billion at an 8% discount, a 38.7% return and $322.5 million of initial capital. Phoenix would be mined by in-situ recovery with its own on-site plant; Gryphon underground, processed at the McClean Lake mill Denison part-owns.
An updated resource for the Midwest property, audited by SRK: indicated rose to 1,019,000 tonnes at 2.26% uranium oxide for 50.78 million lb, from 818,000 tonnes at 2.70% for 48.70 million lb - 25% more tonnes at a 16% lower grade for 4% more metal. Inferred moved from 34,000 tonnes at 6.30% to 845,000 tonnes at 0.98%, taking contained metal from 4.70 to 18.21 million lb.
Planned 18,000 metres in about 40 holes over the summer, all at Gryphon, with 18 of them infill drilling meant to lift the inferred resource to indicated confidence - the drilling a pre-feasibility study needs.
Chemical assays came back 45% above the radiometric probe estimates released during the winter programme, and delivered the best D-lens result to date. Denison's practice of publishing probe numbers first understated these holes.
Multiple high-grade intercepts in the D series of lenses, which lie outside the existing Gryphon resource, from a 16,000-metre winter programme aimed at making the deposit both bigger and better defined.
Reported winter drilling on the wider exploration portfolio - more than 340,000 hectares in the eastern Athabasca Basin outside Wheeler River - with mineralization intersected on several properties.
The first economic study of Wheeler River: a base-case pre-tax return of 20.4% at the then long-term uranium contract price, with Denison's 60% share of initial capital put at C$336 million out of C$560 million for the whole project.
WR-641, 160 metres northwest of Gryphon, returned 3.9% uranium oxide over 9.2 metres including 6.7% over 5.3 metres. These are radiometric probe estimates awaiting chemical assay.
WR-633D1, 100 metres north of Gryphon, cut about 11 metres of basement-hosted mineralization including 5.7% uranium oxide over 1.0 metre and 6.3% over 1.7 metres - the deposit is not closed off to the north.
The independent technical report covering both Wheeler River deposits after the Gryphon estimate, prepared by Roscoe Postle Associates and effective 25 November 2015.
The first resource estimate for Gryphon added 43.0 million lb of inferred uranium oxide to Wheeler River, alongside Phoenix's 70.2 million lb indicated. Eighteen months after the discovery hole, Wheeler River holds two deposits instead of one.
Phoenix passed 70 million lb: indicated resources rose from 52.3 to 70.2 million lb of uranium oxide on 166,400 tonnes, after 25 holes drilled since the 2012 estimate to convert inferred material and extend the higher-grade parts.
The first follow-up hole at Gryphon, WR-560, returned 17.3% uranium oxide over 4.2 metres, confirming the discovery two weeks after it was announced. The same filing carries the annual meeting circular and the chairman's letter to shareholders.
A new discovery: WR-556, 3 km northwest of Phoenix at the K North target, cut 9.7% uranium oxide over 4.6 metres in the basement rock. The zone was named Gryphon and became the second deposit at Wheeler River.
High-grade intersections at Zone A of Phoenix, best of them 29.6% uranium oxide over 6.5 metres in WR-548. The release sets out the ownership that mattered for the next five years: Denison operator with 60%, Cameco 30% and JCU 10%.
Optioned the Jasper Lake property - 18 claims over 45,271 hectares, 40 km east of the Cigar Lake mine - to Strateco Resources, which can earn up to 60% by funding work. Denison keeps its ground working without spending its own money.
First resource estimate for the Phoenix A and B deposits at Wheeler River: 52.3 million lb of uranium oxide indicated, from just 152,400 tonnes at 15.6% uranium oxide, plus 7.6 million lb inferred from 11,600 tonnes at 29.8%. Very small tonnages at extraordinary grades.