Critical One Energy has intersected 31.5 metres grading 4.9% antimony, including a 4.0-metre section at 21.2% antimony, alongside a separate high-grade gold intercept at its flagship Howells Lake Antimony-Gold Project in northwestern Ontario.

Drillhole HWL-2026-016 returned the high-grade antimony mineralization, extending the footprint approximately 70 metres northeast of holes HWL-2026-006 and HWL-2026-007. The hole also intersected 13.9 metres grading 6.6% antimony, including a 1.0-metre interval grading 36.9% antimony.

Below the primary antimony intervals in hole HWL-2026-016, drilling returned 17.0 metres grading 1.3 g/t gold, including 3.0 metres at 2.0 g/t gold, with additional gold occurring in partial overlap with the lower portion of the main antimony interval. Located more than 200 metres to the west, hole HWL-2026-011 returned 12.0 metres grading 1.3 g/t gold, including 1.0 metre at 9.1 g/t gold, with additional gold intersected in holes 8 and 12.

Critical One holds the project as its flagship asset, targeting development as a domestic source of antimony for defence and industrial applications. The current drill program follows the initiation of Phase I diamond drilling in March 2026, representing the first modern drilling program at the property since its original discovery in 1979.

Drilling at Howells Lake will continue northeast and down-dip along the interpreted high-grade antimony structure, which dips approximately 55 degrees northeast and remains open for follow-up drilling. Western drilling will continue to test gold-bearing graphitic volcano-sedimentary horizons and altered mafic tuffs. The active drill program is designed to establish geometry, true widths, grade distribution and continuity while increasing drill density to provide the data required for potential future resource modelling.

“The grade profile and continuity of high-grade, near-surface antimony continue to validate management's confidence in the Howells Lake Project and further support our potential direct-shipping scenario. The bonus is that this new high-grade gold discovery adds another potential source of financial value to the deposit,” said Duane Parnham, Executive Chairman and CEO of Critical One Energy. “This year's drilling has moved us beyond the historical data and closer to defining a current mineral resource that could establish Howells Lake as a meaningful North American source of antimony.”

Read the full announcement: Critical One Energy Discovers Gold with More High-Grade Antimony at Howells Lake Project