Critical One Energy

Howells Lake is starting to show more than antimony.

Hole 6 now shows antimony, gold, and zinc in the East Zone.

Multi-element signatures can help explain what kind of system sits below surface.

The high-grade antimony interval came first:
→ 8.0 m at 42.2% Sb
→ including 4.0 m at 70.2% Sb

Now deeper assays are showing gold-zinc mineralization.

This gives us more than a single intercept to follow.

It adds geological context.

It helps set the next drill targets.

And it supports the interpretation that the East Zone may be part of a broader, vertically extensive antimony-gold system.

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What does a near-surface discovery of near-pure antimony actually mean?

Here’s one way to think about the latest Howells Lake result.

One cubic metre of stibnite-rich material at 70.2% Sb contains roughly 3.25 tonnes of antimony.

At an antimony price of US$35,000 per tonne, that equals about US$114,000 of gross contained antimony value.

This theoretical illustration shows why grade matters.

Now the focus turns to the next holes: proving size, continuity, recoverability, and the path to market.

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NEWS → Critical One signs strategic MOU with (GIP), one of Canada’s largest civil infrastructure companies.

With drilling underway and recent results showing near-pure stibnite, Howells Lake is starting to plan beyond exploration.

The MOU creates a framework for GIP to support:
→ road planning
→ civil works
→ infrastructure planning
→ potential contract mining and material supply
→ equipment/operator training programs in Pickle Lake

Timing matters. Northern Ontario is entering a major infrastructure build-out, with Ring of Fire road construction now underway. Howells Lake sits roughly 120 km west of that access corridor.

Infrastructure planning will move forward the same way the project has so far, in partnership with Eabametoong First Nation.

Recent drill results open the opportunity to evaluate direct-shipping-ore potential, which makes access, roads, and haulage a more important part of the Howells Lake plan.

Bringing in GIP now lets Critical One plan the next phase alongside drilling.

Full news release on our website now.

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LIVE WEBINAR → Critical One Energy will host a live investor webinar on Tuesday, May 19 at 1:00 PM ET to discuss the high-grade antimony drill results from the Howells Lake Antimony-Gold Project in Ontario.

Management will walk investors through drill hole HWL-2026-006, which intersected 4.0 metres of massive stibnite grading 70.2% antimony within a broader 8.0-metre interval grading 42.2% antimony. The hole also returned a second intercept of 1.62% antimony over 7.3 metres.

Duane Parnham, Executive Chairman & CEO, Chet Idziszek, Discovery Geologist, and Matthew Trenkler, Chief Geological Officer, will also take live questions.

Register at the link in the press release.

Can’t attend live? Register anyway and receive the replay.

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