Exhibit 99.1

TSX TRUST COMPANY

VIA ELECTRONIC TRANSMISSION

April 19, 2024

TO ALL APPLICABLE EXCHANGES AND COMMISSIONS:

RE: STANDARD LITHIUM 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:	June 27, 2024
3	Record Date for Notice:	May 15, 2024
4	Record Date for Voting:	May 15, 2024
5	Beneficial Ownership Determination Date:	May 15, 2024
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 materials
	directly to Non-Objecting Beneficial Owners:	YES
11	Issuer paying for delivery to Objecting Beneficial Owners:	NO

Yours truly,

TSX Trust Company

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