Drill Results
Zacatecas Silver Completes Surface Sampling and Mapping Program at Oso Negro Project, Sonora, Mexico
Zacatecas Silver Executes Acquisition Strategy Amidst Price Correction

Executive Summary
- Most Recent Event (April 16, 2026): Zacatecas Silver completed a surface sampling and mapping program at the Oso Negro Project in Sonora, Mexico.
- Key Findings: Identified a robust low sulphidation vein system with over 2 km of cumulative strike length and veins up to 3 m wide. Preliminary observations noted secondary silver minerals.
- Assay Status: 156 rock-chip grab samples dispatched to ALS; turnaround expected in 4–6 weeks.
- Historical Context: Oso Negro features historical channel sampling results including high-grade gold and silver intercepts (e.g., 5.15 g/t Au & 953 g/t Ag over 1.2 metres).
- Strategic Alignment: CEO Eric Vanderleeuw confirms Oso Negro was a priority acquisition target to secure a pipeline of high-impact, underexplored assets in proven mining districts.
Material Impact
- Current Status: The news is positive but incremental. It validates the execution of the March 2026 Heliostar portfolio acquisition strategy.
- Market Expectations: Investors anticipated sampling post-acquisition; therefore, this does not contain genuinely new market-moving information yet.
- Catalyst Timing: Material impact depends on assay results expected in 4–6 weeks (May/June 2026). Until then, the news is operational progress rather than financial revelation.
- Comparison to Recent Drilling: The El Cristo drilling program (April 1) showed visible sulphides and high-grade potential immediately. Oso Negro is currently at a less advanced stage (surface sampling only), making it lower impact than the El Cristo drill results.
- Conclusion: Routine - Positive. It confirms management is moving on the ground with new assets but lacks immediate grade confirmation to alter valuation significantly.
ZAC · Price
Company Overview
- Flagship Project: Zacatecas Silver Project (Panuco/El Cristo vein systems) in the historic Fresnillo silver belt.
- Resource Base: Inferred 20.5 Moz AgEq (19.0 Moz Ag + 19.2 koz Au) from 3.41 Mt at 187 g/t AgEq as of May 2023.
- New Assets: Heliostar portfolio acquired March 2026 includes Oso Negro, Cumaro, La Lola, and Ejutla in Sonora/Oaxaca.
- Secondary Project: Esperanza Gold Project (oxide heap-leach), currently paused due to permitting but preserved as an optionality asset.
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Jul 09, 2026 · 06:30