Standard Lithium (SLI) adds material change report via Form 6-K

Rhea-AI Filing Summary

Standard Lithium Ltd. submitted a Form 6-K as a foreign private issuer for the month of October 2025. The report states that Exhibit 99.1, a material change report dated October 24, 2025, is incorporated by reference into the company’s Form F-10EF and Form S-8 registration statements. The filing is signed on behalf of the company by Chief Financial Officer Salah Gamoudi.

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           ¨         Form 40-F        x

INCORPORATION BY REFERENCE

Exhibit 99.1 of this Report on Form 6-K is incorporated by reference into the Registration Statements on Form F-10EF (File No. 333-289110) and Form S-8 (File No. 333-262400) of the Registrant, as amended or supplemented.

DOCUMENTS INCLUDED AS PART OF THIS REPORT

Exhibit
99.1	Material change report, dated October 24, 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 27, 2025		By:	/s/ Salah Gamoudi
				Name: Salah Gamoudi
				Title:   Chief Financial Officer

FAQ

What did Standard Lithium (SLI) file in this Form 6-K?

Standard Lithium filed a Form 6-K as a foreign private issuer for October 2025. The report primarily serves to furnish Exhibit 99.1, a material change report, and to incorporate that exhibit into existing Form F-10EF and Form S-8 registration statements.

What is Exhibit 99.1 in Standard Lithium’s (SLI) Form 6-K?

Exhibit 99.1 is described as a material change report dated October 24, 2025. This exhibit is the key document attached to the Form 6-K and is incorporated by reference into Standard Lithium’s Form F-10EF and Form S-8 registration statements.

How is this Form 6-K used in Standard Lithium’s (SLI) registration statements?

The Form 6-K specifies that Exhibit 99.1 is incorporated by reference into Standard Lithium’s Form F-10EF and Form S-8 registration statements. This means the material change report becomes part of the disclosure record for those existing registration filings.

Who signed the October 2025 Form 6-K for Standard Lithium (SLI)?

The Form 6-K was signed on behalf of Standard Lithium Ltd. by Salah Gamoudi, the company’s Chief Financial Officer. His electronic signature confirms the company’s authorization and submission of the report dated October 27, 2025.

Does this Form 6-K indicate whether Standard Lithium (SLI) uses Form 20-F or 40-F?

Yes, the Form 6-K indicates that Standard Lithium files or will file its annual reports under cover of Form 40-F rather than Form 20-F. This reflects its reporting framework as a foreign private issuer in Canada.

What period does this Standard Lithium (SLI) Form 6-K cover?

The Form 6-K is stated to be for the month of October 2025. Within that month, it highlights Exhibit 99.1, a material change report dated October 24, 2025, as the key document incorporated into the company’s registration statements.