Sunshine Silver Announces Silver Valley Land Expansion, New Exploration Program

What Happened
Sunshine Silver Mining & Refining Company announced on September 21, 2026 that it has expanded its Silver Valley land position and is initiating a district-scale, multi-year exploration program. The company furnished a press release announcing these developments as Exhibit 99.1 to its Form 8-K. The disclosure was made pursuant to Regulation FD.

Key Details

• Press release dated September 21, 2026 was furnished as Exhibit 99.1 to the Form 8-K.
• The company states it has expanded its land position in the Silver Valley (no acreage or financial terms disclosed in the filing).
• Sunshine Silver is initiating a district-scale, multi-year exploration program (no timeline, budget, or drill targets detailed in the filing).
• The Form 8-K was signed by Michelle Shepston, General Counsel, on September 21, 2026; the Regulation FD disclosure is furnished and is not “filed” for purposes of Section 18 of the Exchange Act.

Why It Matters
This is an operational update indicating Sunshine Silver is increasing its exploration activity in the Silver Valley. For investors, an expanded land position and a district-scale exploration program are early-stage steps that can lead to future updates such as drill results, resource assessments, permitting milestones or financing needs. The current filing does not include financial impacts, drill results, timelines or budgets — watch for subsequent company releases for those details.