Business Context and Reporting Period
Company: Guardian Metal Resources PLC (NYSE.A: GMTL, LON: GMET, OTCQB: GMTLF)
Filing Type: Form 6-K (Report of Foreign Private Issuer)
Date: September 21, 2026
Subject: Positive drilling results from the Tempiute Tungsten Project in Nevada, USA, and the decision to accelerate underground rehabilitation.
Guardian Metal is a strategic exploration company focused on reviving U.S. tungsten production. The filing details the completion of Phase I regional exploration and initial results from Phase II resource drilling at the Tempiute project, a historically significant tungsten mine.
Key Financial and Operational Metrics
Note: This filing is an operational update and does not contain audited financial statements, revenue, profit, or cash flow data for the period.
- Drilling Progress (Phase II): 28 of 46 planned diamond drillholes completed; 4 holes reported with assays, 24 pending.
- Drilling Progress (Phase I): 41 regional drillholes completed; 20 intersected strong mineralization.
- Key Intersection (Phase II): 92.0m @ 0.34% WO3 (Tungsten Trioxide) in hole TP26-046.
- Key Intersection (Phase I): 32.4m @ 0.26% WO3 in hole TP25-021, including a high-grade interval of 1.7m @ 2.00% WO3.
- Capital Support: Received US$6.2M investment in July 2025 from the U.S. Department of War (DoW) under the Defense Production Act for the Pilot Mountain PFS (not Tempiute).
Material Changes and Operational Decisions
Based on the strength of the initial Phase II results and visual observations from pending assays, management has made the following material decisions:
- Underground Rehabilitation: The Company has engaged a contractor to rehabilitate historical underground workings, with work expected to commence in October 2026.
- Drilling Strategy Shift: Rehabilitation will allow the mobilization of underground drill rigs to access the South Thumb and Schofield Zones more efficiently than surface drilling.
- Exploration Scope: Phase I results confirmed that tungsten-rich zones exist well beyond the historical mine footprint, expanding the potential district scale.
Guidance, Outlook, and Risks
Management Commentary: CEO Oliver Friesen stated the results reinforce confidence in advancing the South Thumb and Schofield areas toward an initial Mineral Resource estimate. The objective is to define the scale of the mineralizing system and evaluate the fastest pathway to returning Tempiute to the U.S. supply chain.
Outlook:
- Continuation of Phase II drilling to support a Mineral Resource estimate.
- Assessment of permitting requirements for mining a near-surface lode on patented claims to potentially accelerate extraction.
Risks and Contingencies:
- Exploration Stage: Tempiute is an exploration-stage property; no Mineral Resource or Reserve has been estimated.
- Technical Risk: True thicknesses of intercepts are not yet known. There is no assurance that a Mineral Resource estimate will be defined.
- Forward-Looking Statements: Future plans are subject to risks including permitting, financing, technical issues, and regulatory actions.
Investor Verification Checklist
- Verify the status of the 24 pending Phase II assay results to confirm the continuity of the reported high-grade intersections.
- Review the timeline and budget for the underground rehabilitation program commencing October 2026.
- Confirm the permitting status for the near-surface lode on patented claims mentioned as a potential accelerated extraction pathway.
- Monitor the definition of the initial Mineral Resource estimate, noting that current data is insufficient for such a classification.
- Check for updates on the U.S. Department of War investment utilization regarding the Pilot Mountain project versus Tempiute.