Mr. Daniel Rosen reports

STANDARD LITHIUM PROVIDES QUARTERLY ATM SALES UPDATE

Standard Lithium Ltd. has provided a quarterly update with respect to the company's previously announced at-the-market equity program launched on Aug. 8, 2025. The ATM program allows the company to issue and sell, from time to time, up to $50-million (U.S.) (or the Canadian-dollar equivalent) of its common shares from treasury to the public, at the company's discretion, pursuant to a sales agreement between the company, Canaccord Genuity and Evercore ISI.

During the quarterly period ended Sept. 30, 2026, the company issued a total of 107,631 common shares on the NYSE American LLC exchange at an average price of $2.78 (U.S.) under the ATM program, providing gross proceeds of $299,569 (U.S.). Commissions and fees of $7,495 (U.S.) were paid to the agents in relation to these distributions.

About Standard Lithium Ltd.

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 labour and streamlined permitting. Standard Lithium aims to achieve sustainable, commercial-scale lithium production through the application of a scalable and fully integrated direct lithium extraction and purification process. The company's flagship projects are in the Smackover formation, an attractive lithium brine asset, focused in Arkansas and Texas. In partnership with global energy leader Equinor, Standard Lithium is advancing the South West Arkansas project, a greenfield project located in southern Arkansas, and actively advancing a promising lithium brine resource position in eastern Texas, including the highest known lithium brine grade project in North America, the Franklin project.

Standard Lithium trades on both the TSX Venture Exchange and the NYSE American exchange under the symbol SLI.