Smackover Lithium Reports Highest Lithium Brine Grade in SWA Project Area as FEED Studies Nearing Completion

LEWISVILLE, Ark., July 15, 2025 (GLOBE NEWSWIRE) -- Smackover Lithium, a Joint Venture (“JV”) between Standard Lithium Ltd. (“Standard Lithium” or the “Company”) (TSXV: SLI) (NYSE.A: SLI) and Equinor, is pleased to announce that it has completed sampling from its newest exploration well, the Lester well, in the South West Arkansas (SWA) Project area, and has recorded the highest lithium concentration reported to date from the SWA Project area; 616 mg/L lithium in brine.