Standard Lithium Receives Approval to List on NYSE American

Trading is expected to commence on the NYSE American at the open of markets on July 13, 2021 under the ticker symbol "SLI". Trading on the OTCQX will cease concurrent with the NYSE American listing. The common shares of the Company will continue to trade on the TSX Venture Exchange under the new ticker symbol "SLI" concurrent with the NYSE American listing.

Robert Mintak, Chief Executive Officer of the Company, stated: "We are pleased to announce and privileged to receive approval for Standard Lithium to be listed on the NYSE American. This is a significant achievement for the Company. We believe the listing will greatly enhance Standard Lithium's profile with US capital markets, increasing exposure to a larger and more diverse group of institutional and retail investors. It is also important to highlight that we achieved this milestone without a share consolidation."

Dr Andy Robinson, President and Chief Operating Officer said: "This is an important step-up for Standard Lithium. Our team is working hard to becoming the next lithium producer in the United States while also demonstrating that with the right approach, extraction and sustainability are not exclusive of each other. This listing on the NYSE is a crucial step in growing the Company and will help us in hitting the important project and corporate goals over the coming quarters."

Existing shareholders of the Company are not required to take any action in connection with the change in ticker symbol or the listing on NYSE American. Shareholders trading on the existing OTCQB platform will be able to trade on the NYSE American following completion of the listing.

About Standard Lithium Ltd.

Standard Lithium is an innovative technology and lithium development company. The Company's flagship project is located in southern Arkansas, where it is engaged in the testing and proving of the commercial viability of lithium extraction from over 150,000 acres of permitted brine operations. The Company has commissioned its first-of-a-kind industrial-scale direct lithium extraction demonstration plant at Lanxess's south plant facility in southern Arkansas. The demonstration plant utilizes the company's proprietary LiSTR technology to selectively extract lithium from Lanxess's tail brine. The demonstration plant is being used for proof-of-concept and commercial feasibility studies. The scalable, environmentally friendly process eliminates the use of evaporation ponds, reduces processing time from months to hours and greatly increases the effective recovery of lithium. The company is also pursuing the resource development of over 30,000 acres of separate brine leases located in southwestern Arkansas and approximately 45,000 acres of mineral leases located in the Mojave Desert in San Bernardino county, California.

Standard Lithium is listed on the TSX Venture Exchange under the trading symbol "SLL"; quoted on the OTC - Nasdaq Intl Designation under the symbol "STLHF"; and on the Frankfurt Stock Exchange under the symbol "S5L". Please visit the Company's website at www.standardlithium.com.

On behalf of the Board of Standard Lithium Ltd.

Robert Mintak, CEO & Director

For further information, contact Anthony Alvaro at (604) 240 4793

Twitter @standardlithium

LinkedIn https://www.linkedin.com/company/standard-lithium/

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. This news 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 news release, the words "anticipate", "believe", "estimate", "expect", "target, "plan", "forecast", "may", "schedule" and other similar words or expressions identify forward-looking statements or information. These forward-looking statements or information may relate to future prices of commodities, accuracy of mineral or resource exploration activity, reserves or resources, regulatory or government requirements or approvals, the reliability of third party information, continued access to mineral properties or infrastructure, fluctuations in the market for lithium and its derivatives, changes in exploration costs and government regulation in Canada and the United States, and other factors or information. Such statements represent the Company's current views with respect to future events and are necessarily based upon a number of assumptions and estimates that, while considered reasonable by the Company, are inherently subject to significant business, economic, competitive, political and social risks, contingencies and uncertainties. Many factors, both known and unknown, could cause results, performance or achievements to be materially different 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 does not assume any obligation, to update these forward-looking statements or information to reflect changes in assumptions or changes in circumstances or any other events affections such statements and information other than as required by applicable laws, rules and regulations.