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Companies · HYMC · Gold And Silver Ores · Other events · Aug 18, 2026

Hycroft expands Brimstone and Vortex silver zones, but feeder evidence remains early

High-grade expansionpartly known
82.7m at 87.52 g/t silver at Brimstone; 12.5m at 375.41 g/t silver at Vortex
HYCROFT MINING HOLDING CORP (HYMC) — what happened, in plain English, and what it means versus what the market expected.

The benchmark is qualitative, not a published earnings consensus. Investors already expected continued drilling success: earlier 2026 disclosures said the program was targeting Brimstone and Vortex extensions, with follow-up assay results expected during the second quarter. That makes the direction of this release partly known; the news is the strength and geometry of the new intercepts, not the existence of more drilling results.

Area / holeNew resultWhat it adds
Brimstone — H26D-616982.7m at 87.52 g/t silver and 0.77 g/t gold, including 19.4m at 108.19 g/t silver and 2.10 g/t goldConfirms continuity through the widest section (Drill results — Brimstone)
Brimstone — H26D-6089X18m stockwork-veining zone, including 1.5m at 120.00 g/t silverSupports, but does not prove, a deeper feeder system (Drill results — Brimstone)
Vortex — H26D-608812.5m at 375.41 g/t silver, including 4.2m at 748.02 g/t silverExtends high-grade mineralization 150m west (Drill results — Vortex)
Remaining programApproximately 3,000m of core plannedMore expansion drilling across northern, southern, eastern and western zones (Exploration program)

The core result is genuine resource upside, not an operating result. Brimstone is now described as roughly 300 meters wide and 500 meters long, while Vortex exceeds one kilometer of strike and 500 meters of width. The filing says the Brimstone hole “confirmed continuity of the high-grade system through the widest section.” 〔0〕 Those dimensions and the westward Vortex extension strengthen the geological case for a future underground operation, but they do not yet establish mine economics.

The Vortex intercept is the cleanest incremental positive. The hole extended high-grade silver about 150 meters west and returned 12.5 meters at 375.41 g/t silver, including 4.2 meters at 748.02 g/t silver. That continues a pattern of high grades and expansion already established in prior releases, so it is supportive rather than a wholly new discovery.

The main limitation is that the most valuable geological interpretation is still preliminary. The deeper Brimstone drilling found alteration, geochemistry and stockwork veining consistent with a feeder pathway, but the drill holes remain high in the target. 〔1〕 The filing also explicitly warns that exploration targets are conceptual and not mineral resources or reserves. 〔2〕

Net read: modestly better than the standing exploration expectation, but not a step-change in project certainty. The release adds strong continuity at Brimstone and meaningful western growth at Vortex, while leaving the feeder, feasibility work and commercial mine path unresolved. That supports a mild positive read versus expectations, with the next material test coming from the remaining drilling and eventual incorporation of results into mine planning.

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