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6-K

Standard Lithium Ltd. (SLI)

6-K 2025-05-27 For: 2025-05-27
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Added on April 12, 2026

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 Securities Exchange Act of 1934

For the month of May 2025
Commission File Number 001-40569
Standard Lithium Ltd.
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(Translation of registrant’s name into English)
Suite 1625, 1075 West Georgia StreetVancouver,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

DOCUMENTS INCLUDED AS PART OF THIS REPORT

Exhibit
99.1 Confirmation of Notice of Record and Meeting Dates

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: May 27, 2025 By: /s/ Salah Gamoudi
Name: Salah Gamoudi
Title: Chief Financial Officer

Exhibit 99.1

TSX TRUST COMPANY

VIA ELECTRONIC TRANSMISSION

May 5, 2025

TO ALL APPLICABLE EXCHANGES AND COMMISSIONS:

RE: STANDARDLITHIUM LTD.
Confirmation of Notice of Record and Meeting Dates

We are pleased to confirm that Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities.

We advise the following with respect to the upcoming Annual General and Special Meeting of Security Holders for the subject issuer:

1 ISIN: CA8536061010
CUSIP: 853606101
2 Date Fixed for the Meeting: July 16, 2025
3 Record Date for Notice: May 30, 2025
4 Record Date for Voting: May 30, 2025
5 Beneficial Ownership Determination Date: May 30, 2025
6 Classes or Series of Securities that entitle the holder to receive Notice of the Meeting: COMMON SHARES
7 Classes or Series of Securities that entitle the holder to vote at the meeting: COMMON SHARES
8 Business to be conducted at the meeting: Annual General and Special
9 Notice-and-Access:
Registered Shareholders: YES
Beneficial Holders: YES
Stratification Level: Not Applicable
10 Reporting issuer is sending proxy-related<br> materials directly to Non-Objecting Beneficial Owners: YES
11 Issuer paying for delivery to Objecting Beneficial Owners: NO
Yours truly,
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TSX Trust Company
VANCOUVER CALGARY TORONTO MONTRÉAL
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733 Seymour Street, Telus Sky Building 301 - 100 Adelaide Street West 1701 - 1190, avenue des
Suite #2310 2110, 685 Centre Street SW Toronto ON  M5H 4H1 Canadiens-de-Montréal, C. P. 37
Vancouver, BC  V6B 0S6 Calgary Alberta  T2G 1S5 Montréal (Québec) H3B 0G7
Toll Free 1-866-600-5869
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