6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Reportof Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the SecuritiesExchange Act of 1934

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F     ¨             Form 40-F     x

DOCUMENTS INCLUDED AS PART OF THIS REPORT

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Exhibit 99.1

StandardLithium Completes Leadership Transition: David Park Appointed CEO and Board Member

September 2,2024 Vancouver, British Columbia. – Standard Lithium Ltd. (“Standard Lithium” or the “Company”) (TSXV:SLI) (NYSE American:SLI) (FRA:S5L), a leading near-commercial lithium development company, today announces that, effective September 1, 2024, David Park has officially assumed the role of Chief Executive Officer and has been appointed to the Company's Board of Directors.

As part of this leadership transition, Robert Mintak has stepped down from his position as CEO and from the Board of Directors. Mr. Mintak will continue to serve as a strategic advisor to the Company, ensuring a smooth transition and ongoing guidance.

About StandardLithium Ltd.

Standard Lithium is a leading near-commercial lithium development company focused on the sustainable development of a portfolio of lithium-brine bearing properties in the United States. The Company prioritizes brine projects characterized by high-grade resources, robust infrastructure, skilled labor, and streamlined permitting. The Company 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 signature projects, the Phase 1A Project and the South West Arkansas Project, are located on the Smackover Formation in southern Arkansas, a region with a longstanding and established brine processing industry. The Company has also identified a number of highly prospective lithium brine project areas in the Smackover Formation in East Texas and began an extensive brine leasing program in the key project areas.  In addition, the Company has an interest in certain mineral leases located 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”. Please visit the Company’s website at www.standardlithium.com.

Chris Lang, Director of Finance

+1 604 409 8154

[email protected]

Twitter: @standardlithium

LinkedIn: https://www.linkedin.com/company/standard-lithium/

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Neitherthe TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) acceptsresponsibility for the adequacy or accuracy of this release. This news release may contain certain “Forward-Looking Statements”within the meaning of the United States Private Securities Litigation Reform Act of 1995 and applicable Canadian securities laws. Whenused in this news release, the words “anticipate”, “believe”, “estimate”, “expect”, “target, “plan”, “forecast”, “may”, “schedule” and other similar words or expressions identifyforward-looking statements or information. These forward-looking statements or information may relate to intended development timelines,future prices of commodities, accuracy of mineral or resource exploration activity, reserves or resources, regulatory or government requirementsor approvals, the reliability of third party information, continued access to mineral properties or infrastructure, fluctuations in themarket for lithium and its derivatives, changes in exploration costs and government regulation in Canada and the United States, and otherfactors or information. Such statements represent the Company’s current views with respect to future events and are necessarilybased upon a number of assumptions and estimates that, while considered reasonable by the Company, are inherently subject to significantbusiness, economic, competitive, political and social risks, contingencies and uncertainties. Many factors, both known and unknown, couldcause results, performance or achievements to be materially different from the results, performance or achievements that are or may beexpressed or implied by such forward-looking statements. The Company does not intend, and does not assume any obligation, to update theseforward-looking statements or information to reflect changes in assumptions or changes in circumstances or any other events affectingsuch statements and information other than as required by applicable laws, rules and regulations.

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