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Hycroft Mining · HYMC news official

PO Box 3030 Winnemucca, NV 89446 NEWS RELEASE Hycroft Extends High-Grade Silver at Brimstone and Vortex 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, NV, August 18, 2026 – Hycroft Mining Holding Corporation (Nasdaq: HYMC) (“Hycroft” or “the Company”) announces additional drill results from the 2025-2026 Exploration Drill Program (the “Dri

Briefing

PO Box 3030 Winnemucca, NV 89446 NEWS RELEASE Hycroft Extends High-Grade Silver at Brimstone and Vortex 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, NV, August 18, 2026 – Hycroft Mining Holding Corporation (Nasdaq: HYMC) (“Hycroft” or “the Company”) announces additional drill results from the 2025-2026 Exploration Drill Program (the “Dri Key points: PO Box 3030 Winnemucca, NV 89446 NEWS RELEASE Hycroft Extends High-Grade Silver at Brimstone and Vortex 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 WI; 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; Hole H26D-6089X intersected an 18-meter zone of stockwork veining, including 1.5 meters at 120.00 g/t silver; Hole H26D-6088 extended high-grade silver mineralization at Vortex approximately 150 meters to the west, returning 12.5 meters at 375.41 g/t silver, including 4.2 meters at 748.02 g/t silver; Highlights: • High-grade silver continuity confirmed up-dip at Brimstone, moving the system closer to surface with H26D-6169 intersecting 82.7 meters at 87.52 g/t silver and 0.77 g/t gold, including 19.4 meters at 108.19; Together, these results reinforce the case for a high-grade underground mine. This brief is based on the cited source artifact and is intended as a research entry point, not a replacement for the original source or EGM canonical data tables.

Source Notes

PO Box 3030 Winnemucca, NV 89446 NEWS RELEASE Hycroft Extends High-Grade Silver at Brimstone and Vortex Vortex extends ~150 meters west, with...

Extractive summary evidence · source

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...

Extractive summary evidence 2 · source

Hole H26D-6089X intersected an 18-meter zone of stockwork veining, including 1.5 meters at 120.00 g/t silver.

Extractive summary evidence 3 · source

Hole H26D-6088 extended high-grade silver mineralization at Vortex approximately 150 meters to the west, returning 12.5 meters at 375.41 g/t silver, including...

Extractive summary evidence 4 · source

Extracted Document Text

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# nr 20260818

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## Content

# nr 20260818
Hycroft Mining Holding Corp.
PO Box 3030
Winnemucca, NV 89446
NEWS RELEASE
Hycroft Extends High-Grade Silver at Brimstone and Vortex
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, NV, August 18, 2026 – 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:
• High-grade silver continuity confirmed up-dip at Brimstone, moving the system closer
to surface with H26D-6169 intersecting 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 2.10g/t gold and an interval of 0.7
meters at 14.35 g/t gold
• Vortex high-grade silver system extended approximately 150 meters to the west, with
H26D-6088 intersecting 12.5 meters at 375.41 g/t silver, including 4.2 meters of
748.02 g/t silver
• Potential feeder target below Brimstone advanced by newly confirmed stockwork
veining across a wider zone, as follow-up drilling on last year's geophysics survey
continues
• These exciting results confirm the continued growth of Brimstone and Vortex and
support the Company's strategy of expanding both systems to define the best path for
development, including the potential for a high-grade underground silver mine
• Since commencing the Drill Program in August 2025, the Company has completed
approximately 15,585 meters of core drilling of an approximately 26,000-meter core
drill program
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.”
www.hycroftmining.com
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Table 1. Drill Intercept Highlights
FROM TO INTERVAL GRADE
Hole ID
(meters) (meters) (meters) Ag (g/t) Au (g/t) AgEQ (g/t) AuEQ (g/t)
Brimstone High-Grade System
H25D-6080 79.6 132.1 52.5 18.46 0.43 50.71 0.68
Including 84.3 90.8 6.5 40.46 0.85 104.21 1.39
185.3 235.6 50.3 13.00 0.36 40.00 0.53
Including 215.0 219.5 4.5 66.66 0.62 113.16 1.51
H25D-6082 65.1 119.4 54.3 59.39 0.46 93.89 1.25
Including 69.9 75.5 5.6 173.58 0.44 206.58 2.75
H26D-6085 0.0 153.0 153.0 9.87 0.44 42.87 0.57
H26D-6086 0.0 142.2 142.2 17.66 0.37 45.41 0.61
H26D-6087 29.3 177.1 147.8 32.34 0.44 65.34 0.87
Including 50.6 55.0 4.4 546.83 0.36 573.83 7.65
Including 125.0 149.7 24.6 21.92 0.89 88.67 1.18
H26D-6169 71.2 76.1 4.9 92.81 0.18 106.31 1.42
91.0 106.0 15.0 41.96 0.70 94.46 1.26
122.2 204.9 82.7 87.52 0.77 145.27 1.94
Including 122.2 131.9 9.7 175.77 0.36 202.77 2.70
Including 143.6 147.4 3.8 108.90 0.33 133.65 1.78
Including 167.0 173.1 6.1 140.27 0.64 188.27 2.51
Including 181.7 201.1 19.4 108.19 2.10 265.69 3.54
H26D-6170 85.6 235.0 149.4 33.32 0.42 64.82 0.86
Including 100.2 108.7 8.5 148.12 1.37 250.87 3.34
Including 171.6 181.2 9.6 69.26 0.50 106.76 1.42
Including 220.5 235.0 14.5 70.74 0.17 83.49 1.11
Brimstone Geophysics
H26D-6089 200.9 303.0 102.1 11.26 0.39 40.51 0.54
Including 119.8 137.2 17.4 29.04 0.49 65.79 0.88
H26D-6089X 645.9 647.4 1.5 120.00 0.24 138.00 1.84
664.8 667.5 2.7 44.63 0.10 52.13 0.70
Vortex High-Grade System
H26D-6088 0.0 63.4 63.4 4.73 0.29 26.48 0.35
313.9 405.4 91.4 66.79 0.32 90.79 1.21
Including 387.2 399.6 12.5 375.41 0.21 391.43 5.22
Also including 395.3 399.6 4.2 748.02 0.28 769.02 10.25
Note: $3,600/oz gold and $48/oz silver are used for gold equivalent (AuEQ) and silver equivalent (AgEQ) numbers
www.hycroftmining.com
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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 in late 2025 and returned
alteration and geochemistry consistent with the Brimstone fluid pathway. Hole H26D-6089X
intersected an 18-meter zone of stockwork veining, including 1.5 meters at 120.00 g/t silver.
These results support the interpretation of a potential feeder system at depth. The signatures are
consistent with that interpretation, but drilling remains high in the system and will continue to
advance toward the target.
For the remainder of the Program, the Company will drill approximately 7,200 meters of core at
Brimstone.
Figure 1
Brimstone Section as of March 16, 2026 Brimstone Section as of August 18, 2026
Vortex Results
The strike length at Vortex is currently over a kilometer and is more than 500 meters wide at its
widest point. Like Brimstone, Vortex remains open in all directions and at depth. Recent drilling is
returning higher grades to the west, southwest and to the north.
Hole H26D-6088 extended high-grade silver mineralization at Vortex approximately 150 meters to
the west, returning 12.5 meters at 375.41 g/t silver, including 4.2 meters at 748.02 g/t silver. This
hole was an offset to hole H25D-6072 and continues to expand the high-grade silver system
www.hycroftmining.com
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consistent with the Company's structural targeting strategy at Vortex.
For the remainder of the Program, the Company is expanding drilling across the breadth of the
deposit, targeting the northern, southern and eastern extensions in addition to the western zone,
with approximately 3,000 meters of core planned.
Figure 2
Vortex Section as of April 2, 2026 Vortex Section as of August 18, 2026
www.hycroftmining.com
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About Hycroft Mining Holding Corporation
Hycroft Mining Holding Corporation is a US-based gold and silver company exploring and
developing the Hycroft Mine, among the world’s largest precious metals deposits, located in
northern Nevada, a Tier-1 mining jurisdiction. With a long history of heap leach operations,
Hycroft is advancing to the next phase of operations for processing sulfide mineralization. In
addition, Hycroft is engaged in a robust exploration drill program (2025-2026 Exploration Drill
Program) to expand and advance the two new high-grade silver systems Brimstone and Vortex.
These discoveries represent a significant value driver for the Hycroft Mine.
For Further Information
Investor Relations:
E: info@hycroftmining.com
P: 775-245-0564
Media:
E: media@hycroftmining.com
P: 775-245-0564
www.hycroftmining.com
Qualified Person
The Company's Qualified Person for exploration is Alex Davidson, Vice President, Exploration,
who has reviewed and approved the scientific and technical information contained in this news
release.
Cautionary Note Regarding Forward-Looking Statements
This press release contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of
1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities
Litigation Reform Act of 1995. All statements, other than statements of historical fact, included in this press release
and in public statements by our officers or representatives that address activities, events or developments that we
expect or anticipate will or may occur in the future are forward-looking statements. These include, but are not limited
to, statements regarding future business strategy, plans and goals, competitive strengths, the advancement and
development of the Hycroft Mine, the results and implications of metallurgical analysis and test work, and the
expansion and growth of our business.
Forward-looking statements are often identified by future or conditional words such as "estimate," "plan," "anticipate,"
"expect," "intend," "believe," "target," "budget," "may," "can," "will," "would," "could," "should," "seeks," "scheduled
to" and similar words or expressions but the absence of these words does not mean that a statement is not forward-
looking. Forward-looking statements are based on current expectations, estimates and projections that involve a
number of risks and uncertainties, which could cause actual results to differ materially from those reflected in the
statements. The risks include, but are not limited to: (i) risks related to changes in our operations at the Hycroft Mine,
including risks associated with the cessation of mining operations at the Hycroft Mine; uncertainties concerning
estimates of mineral resources; risks related to the lack of a completed feasibility study; risks related to metallurgical
test work and process development; and risks related to our ability to re-establish commercially feasible mining and
processing operations; and (ii) industry-related risks, including fluctuations in the price of gold and silver; the
commercial success of, and risks related to, our exploration and development activities; uncertainties and risks
related to our reliance on contractors and consultants; and the availability and cost of equipment, supplies, energy or
reagents.
Any exploration target described in this press release does not represent, and should not be construed to be, an
estimate of a mineral resource or mineral reserve. Ranges of potential tonnage and grade (or quality) of an exploration
target are conceptual in nature; there has been insufficient exploration of the relevant property or properties to
estimate a mineral resource; and it is uncertain if further exploration will result in the estimation of a mineral resource.
These and other risks may cause actual results to differ materially from those expressed or implied by the forward-
www.hycroftmining.com
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looking statements, and the occurrence of one or more of these events or circumstances, alone or in combination with
others, may have a material adverse effect on our business, cash flows, financial condition and results of operations.
Please see the "Risk Factors" outlined in our Annual Report on Form 10-K for the year ended December 31, 2025, and
in other reports filed with the SEC, for more information about these and other risks.
Given these risks and uncertainties, you are cautioned not to place undue reliance on these forward-looking
statements. Although we have attempted to identify important factors that could cause actual results to differ
materially from those described in forward-looking statements, there may be other factors that cause results not to be
as anticipated, estimated or intended. A

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