Sunshine Silver Mining & Refining Announces Exceptional Drill Results, Signals Production Growth, and Near-Term Expansion Initiatives

Key Highlights from July 23, 2026 8-K and Press Release

• Sunshine Silver Mining & Refining Company (NYSE: SSMR) has released new drill results from its ongoing 50,000-metre campaign at the historic Sunshine Mine, Idaho. The results include multiple intercepts exceeding 1,000 grams per tonne (gpt) silver in several zones, notably the newly discovered “10 Vein.”
• The drilling program advances two critical objectives:
  • Upgrading mineral resource classification for the 2027 Sunshine Mine Feasibility Study.
  • Expanding the resource in the Upper Country zone, supporting the company’s “Phase 1” goal to double production volume from ~1,000 to 2,000 tonnes per day (tpd).
• High-Grade New Discovery – “10 Vein”:
  • Drill intercepts include:
    • 0.11m @ 32,331 gpt silver, 16.5% copper, 12.8% lead, 11.1% antimony (35,370 gpt Ag-Eq).
    • 0.74m @ 1,667 gpt silver, 56% lead (2,454 gpt Ag-Eq).
    • 2.19m @ 1,135 gpt silver, 14.85% lead (1,404 gpt Ag-Eq).
    • 5m width @ 584 gpt Ag-Eq.
  • This is a new, unmined vein, yielding some of the highest intercepts in the mine’s history.
• Broader Upper Country Results:
  • Additional intercepts over 1,000 gpt silver, including hits of 3,043 gpt and 3,220 gpt Ag-Eq.
  • Results highlight near-mine growth potential and support expansion plans.
• Production & Feasibility Outlook:
  • Sunshine Mine is North America’s highest-grade primary silver resource.
  • Planned return to production in late 2028.
  • At ~1,000 tpd, projected to produce ~6.7 million ounces silver/year for the first five years, ~5.8 million ounces/year over a 24-year mine life.
  • Ambition to double production and realize significant by-product credits from copper, lead, and antimony.
• Largest Mineral Rights Position:
  • Controls ~9,561 hectares in Idaho’s Silver Valley – largest in the district.
  • Systematic exploration underway for additional targets, including district-scale opportunities.
• Recent IPO:
  • Company completed its IPO in June 2026, now trading on the NYSE under the symbol SSMR.
  • Emerging growth company status.

Details That May Be Price Sensitive

• The discovery and confirmation of extremely high-grade silver zones, especially the “10 Vein,” have the potential to materially increase the mine’s resource base and future production profile, directly impacting valuation and investor sentiment.
• The company’s stated ambition to double production volume and expand its mine life with additional critical minerals (copper, lead, antimony) is a significant growth catalyst.
• Ongoing technical studies and feasibility planning (2027 Feasibility Study) are expected to support final investment decisions and production restart, providing a clear timeline for value realization.
• Sunshine’s control of the largest mineral rights package in the Silver Valley suggests substantial exploration upside, further enhancing long-term growth potential.

Technical and Analytical Notes

• Silver equivalent grades calculated using metal prices: \$49.05/oz silver, \$4.89/lb copper, \$0.93/lb lead, \$11.24/lb antimony; metallurgical recovery assumption: 97% for all metals.
• All intercepts are reported as estimated true widths unless otherwise noted; verified by independent Qualified Person (Berkley J. Tracy, SRK Consulting).
• Analytical methods include ICP-OES for base metals; fire assay for silver where required.

Management Commentary

Heather White, CEO: “These drill results certainly reinforce what makes Sunshine America’s must-own silver developer: exceptional size and silver grades, great existing infrastructure with permits, and obvious growth potential… High-grade results from this portion of the drilling program across multiple vein systems strongly support our near-mine growth potential.”

“The in-fill drilling is confirming our expectations — particularly in areas such as the 10 Vein, a completely unmined new vein that is already yielding among the best known intercepts in the history of the Sunshine Mine. Although early days, what is proving extraordinary about this discovery is the expansive scope of its results.”

Investor Contacts

• Media Relations: [email protected]
• Investor Relations: [email protected]
• Website: sunshinesilvermining.com

Cautionary Statements & Disclaimer

This article contains forward-looking statements, including statements regarding mineral resource conversion, future drilling and feasibility studies, production targets, and exploration plans. These are not guarantees of future performance and are subject to risks and uncertainties including market conditions, technical results, permitting, and other factors. Investors should consult the company’s filings with the SEC and conduct their own due diligence. The author assumes no responsibility for investment decisions made based on this article.