Hycroft Extends High-Grade Silver at Brimstone and Vortex

About this update from Hycroft Mining Holding Corporation

Vortex extends ~150 meters west, with 12.5 meters at 375.41 g/t silver, including 4.2 meters of 748.02 g/t silver WINNEMUCCA, Nev., Aug. 19, 2026 /PRNewswire/ -- Hycroft Mining Holding Corporation (Nasdaq: HYMC) ("Hycroft" or "the Company") announces additional drill results from the 2025-2026 Exploration Drill Program (the "Drill Program") at the Hycroft Mine, located in Nevada, USA, a Tier-1 mining jurisdiction. Highlights:  Diane Garrett, Executive Chairman and CEO, commented: "Our drilling continues to confirm the size, continuity, and growth potential of the high-grade silver systems at Brimstone and Vortex. At Brimstone, we're expanding high-grade silver mineralization closer to surface while increasing confidence in the potential for a feeder system at depth. At Vortex, we've extended the high-grade zone an additional 150 meters to the west. Together, these results reinforce the case for a high-grade underground mine. With a strong, debt-free balance sheet, our operational focus this year is to determine the optimal path forward for the mine and drive shareholder value."  Brimstone Results The current dimensions of Brimstone are approximately 300m wide (north to south) and approximately 500m long (east to west down-dip). The system remains open in all directions and at depth. In addition to step-out drilling for expanding the mineralization, the exploration program is also drilling a geophysics anomaly identified in 2025 which indicated a potential feeder system below the known mineralization. Holes H26D-6085, H26D-6086, H26D-6087, H26D-6169, and H26D-6170 continued to expand the up-dip portion of the Brimstone high-grade system. In particular, hole H26D-6169 confirmed continuity of the high-grade system through the widest section. This hole returned an impressive intercept of 82.7 meters at 87.52 g/t silver and 0.77 g/t gold, including 19.4 meters at 108.19 g/t silver and 2.10 g/t gold and an interval of 0.7 meters grading 14.35 g/t gold. Grades of this nature can potentially be supportive of both an open pit and an underground context providing attractive optionality for mining operations. Drilling continued below the main high-grade system to test the potential feeder identified by the geophysics survey completed in 2025. Holes H26D-6089 and H26D-6089X stepped out approximately 90 meters down-dip from the initial holes tested...

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