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Standard Lithium (NYSE American: SLI) reported progress across its portfolio for the three and nine months ended Sept. 30, 2025, highlighted by the completion of a Definitive Feasibility Study for its South West Arkansas (SWA) Project and a Maiden Inferred Resource for the Franklin Project in East Texas. CEO David Park said the results underscore the “attractiveness and cost-competitiveness” of the SWA Project and the strong foundation for scalable production in the Smackover formation. Subsequent to quarter-end, the company closed an upsized $130 million underwritten public offering to advance both projects, received final integration approval from the Arkansas Oil and Gas Commission, and reported the highest lithium-in-brine grade to date from the SWA area at 616 mg/L. Standard Lithium remains positioned to reach FID on the SWA Project and begin construction in 2026.

To view the full press release, visit https://ibn.fm/NPL11

About Standard Lithium

Standard Lithium is a leading near-commercial lithium development company focused on the sustainable development of a portfolio of large, high-grade lithium-brine properties in the United States. The Company prioritizes projects characterized by high-grade resources, robust infrastructure, skilled labor, and streamlined permitting. Standard Lithium aims to achieve sustainable, commercial-scale lithium production via the application of a scalable and fully integrated DLE and purification process. The Company’s flagship projects are located in the Smackover Formation, a world-class lithium brine asset, focused in Arkansas and Texas. In partnership with global energy leader Equinor, Standard Lithium is advancing the SWA Project, a greenfield project located in southern Arkansas, and actively advancing a promising lithium brine resource position in East Texas.

NOTE TO INVESTORS: The latest news and updates relating to SLI are available in the company’s newsroom at https://ibn.fm/SLI

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