LTUM’s 2025 infill drilling at the Vega Zone returned multiple significant lithium intercepts, including 55.0 m at 2.58% Li₂O (hole CV25-1006) with a higher-grade core of 29.9 m at 4.11% Li₂O, and 24.7 m at 4.00% Li₂O (hole CV25-1017A) including 7.0 m at 6.04% Li₂O. These results represent the widest interval exceeding 6% Li₂O and contribute to one of the largest pegmatite mineral inventories globally. A total of 57,024 m (245 holes) of diamond drilling was completed across the Property in 2025, of which 41,943 m (173 holes) had been reported previously.

The 2025 campaign uncovered the shallow Helios Zone at the CV13 pegmatite, marking LTUM’s latest high-grade discovery. Drill hole CV25-984 intersected 8.8 m at 2.97% Li₂O, including 5.4 m at 4.60% Li₂O, while CV25-977 returned 6.4 m at 2.61% Li₂O including 4.1 m at 3.94% Li₂O. Helios also exhibits coincident tantalum enrichment and has triggered multiple overlimit assays for caesium, pending final analysis. This zone expands potential underground resources along strike of the existing CV13 reserves.

At the Rigel Zone, infill drilling achieved an intercept of 11.5 m at 2.87% Li₂O in hole CV25-919, including 6.9 m at 4.40% Li₂O. High-grade tantalum was also encountered, notably 15.0 m at 1.15% Li₂O with 1,105 ppm Ta₂O₅ in hole CV25-913, including 7.9 m at 2.15% Li₂O and 1,974 ppm Ta₂O₅. These results bolster confidence in the continuity of lithium and tantalum mineralization within the CV13 complex and support ongoing reserve conversion efforts.

LTUM plans to integrate the newly acquired 2025 drill data into updated geological and block models for the CV5 and CV13 pegmatites, feeding into a revised economic study targeted for H2 2026. Concurrently, the Company is advancing permits for an underground bulk sample at CV5. Pending overlimit caesium assays will further refine resource estimates across Vega, Rigel and Helios zones, underpinning LTUM’s ambition to establish a critical mineral supply hub in North America.