Critical One Energy drills antimony-gold mineralization at Howells Lake

Toronto, Ontario--(Newsfile Corp. - September 29, 2026) - Critical One Energy Inc. (CSE: CRTL) (OTCQB: CTLOF) (FSE: 4EF) (" Critical One " or the " Company ") is pleased to announce assay results from four drill holes at its flagship Howells Lake Antimony-Gold Project ("Howells Lake Project"), located approximately 120 kilometres west of the Ring of Fire access corridor in Ontario, Canada. The results extend antimony ("Sb") mineralization 30 metres ("m") northeast of the high-grade East Zone intersections, add near-surface antimony, further confirm gold ("Au") mineralization beneath the East Zone, and intersect additional gold mineralization in the West Zone.

Highlights:

Antimony zone extended northeast: HWL-2026-017 returned 11.9 m grading 1.75% Sb, including 3.6 m at 3.78% Sb . HWL-2026-017 was drilled down-dip of HWL-2026-016 ( released August 20, 2026 ) and extends Sb mineralization 30 m to the northeast of the Howells Lake East Zone. Assays from 168 m to 236 m are pending.

Additional near-surface antimony: HWL-2026-009 returned 1.15 m grading 3.32% Sb and 3.75 m grading 0.90% Sb in the East Zone, and 7.64 m grading 0.46 g/t Au .

Gold confirmed beneath the East Zone: HWL-2026-014 returned 7.0 m grading 1.49 g/t Au, including 3.0 m at 2.69 g/t Au , and a polymetallic interval of 6.0 m grading 0.39% Sb, 0.43 g/t Au and 0.40% Zn .

Gold in the West Zone: HWL-2026-013 returned 5.0 m grading 0.57 g/t Au .

"The 2026 Howells Lake drill program is going according to plan, delivering strong, high-grade, near-surface antimony results that have exceeded expectations at this stage," said Duane Parnham, Executive Chairman and CEO of Critical One Energy. "We're continuing to move forward quickly to drill at Howells Lake, with more data coming this fall. These results are building toward a planned mineral resource estimate while also helping define the next ste