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SLI.V ·

Standard Lithium Provides Quarterly Atm Sales Update

Financings

LEGAL*68665514.4

STANDARD LITHIUM PROVIDES QUARTERLY

ATM SALES UPDATE

VANCOUVER, BC, July 4, 2025 – 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 November 17, 2023. 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, Citigroup and Canaccord Genuity (collectively, the “Agents”).

During the quarterly period ended June 30, 2025, the Company issued a total of 115,874 common

shares on the TSX Venture Exchange (the “TSXV”) at an average price of C$2.26 per share and

6,393,216 common shares on the NYSE American LLC (the “ NYSE American”) at an average

price of US$1.72 under the ATM Program, providing gross proceeds of C$262,300 and

US$10,990,422, respectively. Commissions and fees of C$6,560 and US$274,820 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 brine 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 direct lithium extraction and purification process. The Company’s flagship projects are

located in the Smackover Formation, a world-class lithium brine asset, focused in Arkansas and

Texas. In partnership with global energy leader Equinor ASA, the Company is advancing the

South West Arkansas project, a greenfield project located in southern Arkansas, and actively

exploring promising lithium brine prospects in East Texas.

Standard Lithium trades on both 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 and Media Inquiries

Dan Rosen

Standard Lithium Ltd.

[email protected]

+1 604 409 8154