HYMC · 10-Q · 2026Q1 · Full report

Exploration Drill Program

HYCROFT MINING HOLDING CORP · 2026-04-28 · Importance 45 · Surprise 42

The Company completed approximately 9,255 meters of drilling on 26 exploration holes under the 2025–2026 Exploration Drill Program focused on the high-grade silver systems at Brimstone and Vortex on the Hycroft property. IP geophysics identified a large chargeability anomaly at 400–500 meters in Brimstone; early holes extended mineralization ~150 meters down dip and 2026 drilling continues to target that anomaly. Results from Vortex returned higher-than-expected silver and gold grades with improved continuity, and additional assays (including Bay targets) are expected in Q2 and H2 2026, supporting resource expansion.

Key facts

• The Company identified a large IP chargeability anomaly at 400 to 500 meters depth supporting drilling in the Brimstone zone.
• The first three holes drilled in the IP anomaly were completed in the fourth quarter of 2025 and results were returned in the first quarter of 2026 extending the mineralized system approximately 150 meters down dip from the high-grade Brimstone deposit.
• Assay results from drilling in the IP anomaly target are expected in the second quarter of 2026.
• The Company began investigating potential leach opportunities in Bay at the north end of the property in late 2025 with results anticipated in the second half of 2026.
• The Company completed more than 9,000 meters of drilling under the 2025–2026 Exploration Drill Program to date.
• Approximately 9,255 meters of drilling have been completed on 26 exploration holes in the high-grade silver systems since initiating the Program on August 3, 2025.
• The 2025 drilling in Vortex extended high-grade mineralization further west at structural intersections of the Central, Albert, and Wild Rose faults.

Impact estimates