06:29 AM EDT, 10/08/2025 (MT Newswires) -- Teck Resources Limited was at last look up 0.7% in US premarket trade early Wednesday after providing an update on the progress of the Quebrada Blanca (QB) Action Plan and providing an updated operational outlook following the completion of the Comprehensive Operations Review. In addition, Teck provided third quarter 2025 production and sales volumes and positive settlement pricing adjustments.

Teck noted its Comprehensive Operations Review, launched in August, focused on improving performance through a detailed QB Action Plan, "identifying opportunities to enhance operating practices and setting out plans that are reasonable and achievable".

In parallel, through the third quarter, Teck said it completed a detailed assessment of all operating plans, with review and input from third-party technical experts, independent advisors, and oversight by the Safety, Operations and Projects Committee of its Board of Directors. This work, it added, focused on redefining ranges of outcomes for key inputs and value drivers and the reassessment and quantification of risks to establish production and cost ranges for each operation based on proven performance, as well as identifying improvement opportunities to preserve and enhance asset value.

Specific to QB, Teck said updated production ranges capture impacts of the Tailings Management Facility (TMF) to date and the ongoing QB Action Plan. It added completion of this detailed review has resulted in revisions to its previously disclosed annual production guidance for QB and Highland Valley Copper for 2025-2028, Red Dog for 2026-2028, and Trail for 2026. Further, as a result of changes to its production guidance, Teck has updated its previously disclosed 2025 annual net cash unit cost guidance for QB and its copper segment and provided 2026 annual net cash unit cost guidance for its copper and zinc segments.

Further details on its updated guidance were outlined.

In an update on its QB Action Plan, Teck said production at QB continues to be constrained by the pace of development of the TMF, requiring downtime in the concentrator to manage the rate of tailings rise. "Teck's priority remains enabling safe, unconstrained production by raising the crest height of the dam. This is being delivered through construction of additional rock benches while continuing to progress efforts to improve sand drainage to support construction of the sand dam"

On Q3 2025 production and sales and 2025 production guidance, Teck said performance across its operations in Q3 2025 was in line with expectations in its previously disclosed annual 2025 guidance, with the exception of QB and HVC, as outlined. It noted copper prices remain strong, averaging US$4.44 per pound in the third quarter and closing the quarter at $4.67 per pound, contributing to $108 million of positive pricing adjustments in Q3 2025.