Welcome to our dedicated page for Critical One Energy news (Ticker: MMTLF), a resource for investors and traders seeking the latest updates and insights on Critical One Energy stock.
Critical One Energy Inc. reports developments as a Canadian mining exploration company focused on critical metals and minerals. Its updates center on the Howells Lake Antimony-Gold Project in Ontario's Thunder Bay Mining Division, including exploration permitting, Ontario Junior Exploration Program funding, geophysical interpretation, drilling activity, and near-surface antimony and gold mineralization.
Company news also covers its broader critical-minerals portfolio, including uranium and copper assets in Namibia's Erongo uranium province, as well as exploration agreements with Indigenous communities, strategic advisory appointments, capital-market communications, and stock-option grants tied to its public-company governance.
Critical One Energy (OTCQB: MMTLF) reported new drill assay results from its Howells Lake Antimony-Gold Project in northwestern Ontario, highlighting additional near-surface high-grade antimony and newly defined gold mineralization. Key hole HWL-2026-016 cut 31.5 m grading 4.9% Sb, including 4.0 m at 21.2% Sb, plus 13.9 m at 6.6% Sb, including 1.0 m at 36.9% Sb.
HWL-2026-003, 004 and 005 returned multiple near-surface Sb intervals, while HWL-2026-016 also intersected 17.0 m grading 1.3 g/t Au. Over 200 m west, HWL-2026-011 hit 12.0 m at 1.3 g/t Au, including 1.0 m at 9.1 g/t Au. According to the company, this drilling extends a high-grade Sb zone about 70 m northeast and advances work toward a potential future mineral resource.
Critical One Energy (OTCQB: MMTLF) provided an update on its Kenora Property in northwestern Ontario after the termination of a mineral property option agreement with American Atomics. Critical One retains a 100% interest in the Kenora Property, as American Atomics did not earn any interest before ending the option on May 3, 2026.
The company reports that unpatented mining claim 531620, previously part of the property, lapsed while the option was in place and has since been staked and registered by an unrelated third party, and is no longer available to be re-staked or transferred back. Critical One also notes that American Atomics staked ten unpatented mining claims within the area of common interest defined in the option agreement, and under that agreement Critical One is entitled, after termination, to request the transfer of those claims to the company or its designee at no additional consideration.
Critical One Energy (CSE: CRTL, OTCQB: MMTLF, FSE: 4EF) has engaged Micon International to provide independent third-party technical review, compliance and oversight of its internal resource-definition program at the Howells Lake Antimony-Gold Project in northwestern Ontario.
Micon will review technical data, geological interpretations and workflow as the internal model moves beyond the historical resource, aiming to identify data gaps early and support efficient drill planning. According to Critical One, its 2026–2027 drilling campaign is funded, with about 7,000 metres of drilling already completed at Howells Lake.
Critical One Energy (CSE: CRTL, OTCQB: MMTLF) reported positive preliminary metallurgical results from four selected samples from drill hole HWL-2026-006 at its Howells Lake Antimony-Gold Project in northwestern Ontario. Blue Coast Research found antimony is mainly hosted in highly liberated stibnite, with modal stibnite contents between 10.9% and 97.1% and Sb grades from 1.41% to 70.7%.
No arsenic or mercury-bearing minerals or other deleterious materials were identified. Stibnite liberation ranged from 92.8% to 99.1% and berthierite from 84.9% to 89.7%. According to the company, these mineralogical results suggest the antimony-bearing minerals may be amenable to flotation and will guide the next phase of metallurgical testwork.
Critical One Energy (OTCQB: MMTLF) reported new 2026 drill results from its Howells Lake antimony-gold project in Ontario.
Hole 7 intersected 4.17 m grading 27.35% Sb, including 1.1 m at 70.3% Sb. Holes 1 and 2 confirmed near-surface Sb, while Hole 16 shows a 53.6 m visual massive stibnite interval, with mineralization remaining open along strike. Assays use accredited labs and documented QA/QC.
Critical One Energy (OTCQB: MMTLF) reported new assays from Hole 6 at the Howells Lake antimony-gold project in Ontario.
The lower antimony zone now runs 15.3 m at 1.76% Sb from 114.7–130 m, within a broader 79–130 m mineralized envelope, and includes gold-zinc intervals up to 1.17 g/t Au and 0.54% Zn. Eighteen holes (~4,000 m) are completed, with funding in place for 20,000 m of drilling through December 2026.
Critical One Energy (OTCQB: MMTLF) signed a strategic, non-binding MOU with Green Infrastructure Partners, one of Canada's largest civil infrastructure firms, for its Howells Lake Antimony-Gold Project in Northern Ontario.
The framework covers road planning, civil works, First Nation workforce training, and a first right of refusal on contract mining and material supply, aligning the project with the planned Ring of Fire road program and broader critical minerals infrastructure build-out.
Critical One Energy (OTCQB: MMTLF) reported new drill assays from its Howells Lake antimony-gold project in Ontario. Hole HWL-2026-006 cut 4.0 m grading 70.2% antimony within 8.0 m at 42.2% Sb, plus a deeper 7.3 m interval at 1.62% Sb.
All eight holes near the historic Howells Lake East Antimony Zone intersected visible stibnite. Results suggest potential for direct shipping ore to North American buyers. QA/QC used blanks, standards and accredited AGAT Labs; overlimit (>5% Sb) values are semi-quantitative pending further mineralogical work.
Critical One Energy (OTCQB: MMTLF) appointed General (Ret.) Charles A. Flynn to its Strategic Advisory Board, effective April 16, 2026.
General Flynn will advise on U.S. strategic engagement, government and defence relationships, supply chain partnerships and offtake discussions as the company advances drilling at the Howells Lake Antimony-Gold Project. The company granted him 200,000 stock options at CDN$1.03 for five years.
Critical One Energy (OTCQB: MMTLF) reported visible, near-surface antimony mineralization in the first Phase I diamond drill hole (HWL-2026-001) at Howells Lake. HWL-2026-001 reached 201 metres with multiple stibnite-bearing zones within the first ~100 metres, starting at 24 metres.
Core is being logged and samples were submitted to AGAT Laboratories; assays are pending. The project has a historical, non‑NI 43-101 estimate of 1.7 million tons at 1.4% antimony, which the company says requires verification.