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SLI.V ·

Standard Lithium Provides Quarterly Atm Sales Update

STANDARD LITHIUM PROVIDES QUARTERLY

ATM SALES UPDATE

VANCOUVER, BC, July 3, 2026 – Standard Lithium Ltd. (“Standard Lithium ” or the

“Company”) (TSXV: SLI) (NYSE American: SLI), a leading near-commercial lithium company,

today provided a quarterly update with respect to the Company’s previously announced “at-the-

market” equity program (the “ATM Program”) launched on August 8, 2025. The ATM Program

allows the Company to issue and sell, from time to time, up to US$50,000,000 (or the Canadian

dollar equivalent) of its common shares (“Common Shares”) from treasury to the public, at the

Company’s discretion, pursuant to a sales agreement (the “Sales Agreement ”) between the

Company, Canaccord Genuity and Evercore ISI (collectively, the “Agents”).

During the quarterly period ended June 30, 2026, the Company issued a total of 3,139,330

Common Shares on the NYSE American LLC (the “NYSE American”) at an average price of

US$3.59 under the ATM Program, providing gross proceeds of US$11,261,931. Commission and

fees of US$281,780 were paid to the Agents, in relation to these distributions.

About Standard Lithium Ltd.

Standard Lithium is a leading near-commercial lithium development company focused on the

sustainable development of a portfolio of large, high-grade lithium-brine properties in the United

States. The Company prioritizes projects characterized by high-grade resources, robust

infrastructure, skilled labor, and streamlined permitting. Standard Lithium aims to achieve

sustainable, commercial-scale lithium production via the application of a scalable and fully

integrated DLE and purification process. The Company’s flagship projects are in the Smackover

Formation, a world-class lithium brine asset, focused in Arkansas and Texas. In partnership with

global energy leader Equinor, Standard Lithium is advancing the SWA Project, a greenfield project

located in southern Arkansas, and actively advancing a promising lithium brine resource position

in East Texas, including the highest known lithium brine grade project in North America, the

Franklin Project.

Standard Lithium trades on both the TSX Venture Exchange (the “ TSXV”) and the NYSE

American under the symbol “SLI”.

Neither the TSXV nor its Regulation Services Provider (as that term is defined in policies of the

TSXV) accepts responsibility for the adequacy or accuracy of this release.

Investor Inquiries

Daniel Rosen

+1 604 409 8154

[email protected]

Media Inquiries

[email protected]