2022-05-24 | TSXV:SLI | Press release

VANCOUVER, British Columbia, May 24, 2022 (GLOBE NEWSWIRE) — Standard Lithium Ltd. (“standard lithium” or the “Company”) (TSXV: SLI) (NYSE.A: SLI) (FRA: S5L), an innovative lithium and technology project development company, today announced its participation in the upcoming Citi Lithium and Battery Virtual Investor Conference Day on May 26, 2022.

Event: Citi Virtual Lithium and Battery Day 2022

Topic: Round table: Emerging lithium

Date: Thursday, May 26, 2022

Weather: 9:30 a.m. to 10:05 a.m. ET

Location: Virtual — Webcast link

About Standard Lithium Ltd.

Standard Lithium is an innovative lithium technology and development company. The company’s flagship project is located in southern Arkansas, where it is engaged in testing and proving the commercial viability of extracting lithium from more than 150,000 acres of licensed brine operations. . The company operates its first utility-scale Direct Lithium Extraction (DLE) demonstration plant at the LANXESS South Plant in southern Arkansas. The demonstration plant uses the company’s proprietary LiSTR technology to selectively extract lithium from LANXESS tail brine. The demonstration plant is used for commercial feasibility studies. The scalable, environmentally friendly process eliminates the use of evaporation ponds, reduces processing time from months to hours, and dramatically increases efficient lithium recovery. The Company is also pursuing resource development of more than 30,000 acres of separate brine leases located in southwest Arkansas, referred to as the Southwest Arkansas Lithium Project, and approximately 45,000 acres of mining claims located in the Mojave Desert of San Bernardino County, California.

Standard Lithium is jointly listed on the TSX Venture Exchange and the NYSE American under the trading symbol “SLI”; and on the Frankfurt Stock Exchange under the symbol “S5L”. Please visit the Company’s website at http://www.standardlithium.com.

On behalf of the Board of Directors of Standard Lithium Ltd.

Robert Mintak, CEO and Director

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. This press release may contain certain “Forward-Looking Statements” within the meaning of the United States Private Securities Litigation Reform Act of 1995 and applicable Canadian securities laws. When used in this press release, the words “anticipate”, “believe”, “estimate”, “expect”, “target”, “plan”, “expect”, “may”, “plan” and d other similar words or expressions identify forward-looking statements or information. Such forward-looking statements or information may relate to future commodity prices, accuracy of mineral exploration or resource activities, reserves or resources, regulatory or governmental requirements or approvals, reliability of third-party information, continued access to mining properties or infrastructure, fluctuations in the market for lithium and its derivatives, changes in exploration costs and government regulations in Canada and the United States, and other factors or information. These statements represent the Company’s current views with respect to future events and are necessarily based on a number of assumptions and estimates which, while believed to be reasonable by the Company, are inherently subject to business risks, significant economic, competitive, political and social, hazards and uncertainties. Many factors, known and unknown, could cause actual results, performance or achievements to differ materially from the results, performance or achievements that are or may be expressed or implied by such forward-looking statements. The Company does not intend, and undertakes no obligation, to update such forward-looking statements or information to reflect changes in assumptions or changes in circumstances or any other event affecting such statements and information other than those required by laws, rules and regulations.

For further information contact: LHA Investor Relations David Barnard +1 415-433-3777 [email protected] [email protected]

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