[6-K] STANDARD LITHIUM LTD. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Standard Lithium Ltd. furnished a Form 6-K as a foreign private issuer, noting it files annual reports on Form 40-F. The submission includes Exhibit 99.1: the South West Arkansas Project NI 43-101 Technical Report & Definitive Feasibility Study.

The report is dated October 14, 2025, with an effective date of September 3, 2025. This filing provides the finalized technical and feasibility documentation for the South West Arkansas lithium project within the company’s continuous disclosure record.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

For the month of	October		2025
Commission File Number	001-40569

Standard Lithium Ltd.

(Translation of registrant’s name into English)

Suite 1625, 1075 W Georgia Street

Vancouver, British Columbia, Canada V6E 3C9

(Address of principal executive offices)

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   o        Form 40-F   x

DOCUMENTS INCLUDED AS PART OF THIS REPORT

Exhibit
99.1	South West Arkansas Project NI 43-101 Technical Report & Definitive Feasibility Study, dated October 14, 2025 and with an effective date of September 3, 2025.

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.

			Standard Lithium Ltd.
			(Registrant)
Date:	October 14, 2025		By:	/s/ Salah Gamoudi
				Name:	Salah Gamoudi
				Title:	Chief Financial Officer