EQS — News: Successful LSC — 3a well test de — risks and strengthens confidence in the Lionheart Field Development Plan

============ EQS-News: Vulcan Energy Resources Limited / Key word(s): Drilling Result Successful LSC-3a well test de-risks and strengthens confidence in the Lionheart Field Development Plan 15.10.2026 / 08:24 CET/CEST The issuer is solely responsible for the content of this announcement. ══════════════════════════════════════════════════════════════════════════ Successful LSC-3a well test de-risks and strengthens confidence in the Lionheart Field Development Plan Key highlights • Successful completion of the seventh well (LSC-3a) in the planned 28 well Field Development Plan represents an important execution de-risking milestone for Project Lionheart (Lionheart) • Completed by Vulcan’s in-house drilling company, Vercana, LSC-3a is Vulcan’s first well to re-inject brine back into the matrix of the sandstone reservoir • Reinjection of lithium-depleted brine back into the reservoir matrix provides direct field validation of matrix-injection, key evidence supporting the base case production scenario • The Lionheart Field Development Plan is being delivered at or above expectations which supports the key subsurface assumptions, reduces uncertainty and allows additional optimisation oppo