Mr. Chris Lang reports

STANDARD LITHIUM ANNOUNCES STOCK OPTION GRANT

Standard Lithium Ltd. has granted 400,000 incentive stock options, effective June 23, 2025, of which 100,000 options will vest six months after the effective date, with the remaining options vesting in three equal tranches over a three-year period on each anniversary of the effective date.

The options will be exercisable until June 23, 2030, at a price equivalent to the closing price on the NYSE American exchange on the effective date and will at all times be subject to the terms of the incentive plan maintained by the company and the policies of the TSX Venture Exchange.

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 located in the Smackover formation, a world-class lithium brine asset, focused in Arkansas and Texas. In partnership with global energy leader Equinor ASA, Standard Lithium is advancing the South West Arkansas project, a greenfield project located in southern Arkansas, and actively exploring promising lithium brine prospects in eastern Texas.

Standard Lithium trades on both the TSX-V and the NYSE American exchange under the symbol SLI.

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