Mr. David Park reports

STANDARD LITHIUM APPOINTS PAUL COLLINS TO THE BOARD OF DIRECTORS

Standard Lithium Ltd. has appointed Paul Collins as an independent member of its board of directors.

Robert Cross, non-executive chairman of the board of directors, commented: "On behalf of the Standard Lithium board, I am delighted to welcome Paul as an independent director. He brings over 35 years of advisory and investment banking experience in industrials, chemicals and energy to the board. Throughout his career, Paul served as a trusted adviser to executives and boards on strategic issues, including financing, capital allocation and transactions."

"Paul adds significant strategic leadership to Standard's board as our focus turns to bringing production on-line for our shareholders," said David Park, chief executive officer and director of Standard Lithium. "Two thousand twenty-five is expected to be a pivotal year for the company as we pursue customer offtake commitments and financing. His experience in these areas will be indispensable as we continue to advance our world-class lithium brine projects in partnership with Equinor."

Mr. Collins has advised on company strategy, mergers and acquisitions, and corporate finance. From 2014 to 2023, he was senior adviser and partner at Centerview Partners LLC, where he worked with C-suites and boards on long-term strategic issues and financing in the industrials and chemicals sectors. Prior to joining Centerview, Mr. Collins served as the vice-chairman of Barclay's North American investment banking division, energy and chemicals, from 2008 to 2014. Previously, he held various leadership positions at Lehman Brothers, Merrill Lynch, the Blackstone Group and Salomon Brothers. During his tenure in investment banking, he advised on approximately $190-billion in various transactions worldwide.

Mr. Collins holds a master of business administration from the Wharton School, University of Pennsylvania and a civil law degree with honours from University College in Dublin, Ireland.

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 the highest-quality resources, robust infrastructure, skilled labour and streamlined permitting. Standard Lithium aims to achieve sustainable, commercial-scale lithium production via the application of a scalable and fully integrated direct lithium extraction (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 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 East Texas. Additionally, the company is advancing the phase 1A project in partnership with LANXESS Corp., a brownfield development project located in southern Arkansas. Standard Lithium also holds an interest in certain mineral leases in the Mojave Desert in San Bernardino county, California.

Standard Lithium trades on both the TSX Venture Exchange and the NYSE American under the symbol SLI, and on the Frankfurt Stock Exchange under the symbol S5L.

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