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Midas Edge

STANDARD LITHIUM LTD.

For the period ended Oct 20, 2026. Filed Oct 20, 2026.

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What a company based outside the US has published at home or sent to its shareholders. It is how many foreign companies share results and news between annual reports.

Oct 20, 2026 · Filed Oct 20, 2026

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6-K 1 tm2627706d1_6k.htm FORM 6-K

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 · 2026
Commission File Number001-40569

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 oForm 40-F x

INCORPORATION BY REFERENCE

Exhibits 99.1, 99.2, 99.3, 99.4, 99.5, 99.6, 99.7 and 99.8 of this Report on Form 6-K are incorporated by reference into the Registration Statement on Form F-10EF (File No. 333-289110) of the Registrant, as amended or supplemented.

DOCUMENTS INCLUDED AS PART OF THIS REPORT

Exhibit
99.1NI 43-101 Technical Report Preliminary Economic Assessment for the Franklin Project Located in Hopkins, Franklin, and Titus Counties, Texas, United States with an effective date of July 20, 2026
99.2Consent of Randal Huffsmith
99.3Consent of Mayooran Somanathan
99.4Consent of Piers Wendlandt
99.5Consent of Ibrahim Karajeh
99.6Consent of Randal M. Brush
99.7Consent of Robert E. Williams, Jr.
99.8Consent of Marek Dworzanowski

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 20, 2026By:/s/ Salah Gamoudi
Name:Salah Gamoudi
Title:Chief Financial Officer
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