Standard Lithium Ltd. has initiated an at-the-market equity offering of up to US$50,000,000 (approximately C$68,493,150) in common shares, qualified by a prospectus supplement dated August 8, 2025. The offering will be conducted through a sales agreement with Canaccord Genuity Corp. (Canadian Agent), Canaccord Genuity LLC, and Evercore Group L.L.C. (U.S. Agents), who will act as agents or principals in the distribution. The agents will receive a placement fee of up to 3.0% of the gross proceeds and reimbursement of certain expenses.

Legal counsel for Standard Lithium includes Cassels Brock & Blackwell LLP (Canada) and Skadden, Arps, Slate, Meagher & Flom LLP (U.S.), while DLA Piper (Canada) LLP and Latham & Watkins LLP (U.S.) represent the agents.

The offering is being made in Canada and the United States, with shares to be listed on the TSX Venture Exchange and NYSE American under the symbol “SLI,” subject to regulatory approvals. Proceeds will fund ongoing work at the South West Arkansas Project, exploration and development in East Texas, working capital, and general corporate purposes. The offering is not subject to a minimum raise, and shares will be sold at prevailing market prices.