Standard Lithium Prepares for Investment Decision on 22,500-Tonne-a-Year Arkansas Project
Key Facts
Standard Lithium has taken preliminary steps toward a final investment decision on its southwest Arkansas project, after completing the federal environmental review and signing two major construction contracts, according to the company’s second-quarter filing with the U.S. Securities and Exchange Commission. The company said the two milestones represented “two of the key prerequisites to making a final investment decision” on the project. The project is in the Smackover formation, but remains at the stage of preparing for an investment decision, and the filing does not establish that companies operating or interested in the area have collectively accelerated their investments. The significance of the progress is that it puts a specific project through steps that precede construction, while other companies’ plans in the area are at different stages of development. These steps indicate progress on the project; they are not an announcement that commercial production has begun.
The main project of the Smackover Lithium partnership is the southwest Arkansas project, in which Standard Lithium owns 55% and Equinor 45%, according to the project page. Phase 1 targets production of 22,500 tonnes a year of battery-grade lithium carbonate. The feasibility study puts planned average lithium concentration at 481 mg/L, supporting a projected operating life of at least 20 years. These figures provide a framework for the facility’s scale and expected life, but remain targets and feasibility-study estimates for a project that has not yet reached a final investment decision. The initial phase relies on Aquatech’s licensed selective lithium adsorption process, previously known as Koch Technology Solutions, and Standard Lithium says the technology includes performance guarantees.
Under a commercial agreement tied to the project, Standard Lithium has committed to supply LG Energy Solution with 8,000 metric tonnes a year of battery-grade lithium carbonate for 10 years after commercial production begins. The agreement sets out a buyer, an annual volume and a supply term for the project, but supply begins after commercial production, not at the current stage. After the agreement was announced in September 2026, Standard Lithium shares rose 2%, according to Reuters coverage cited by Mining Weekly. The recorded market reaction indicates how the shares moved after the agreement was announced, without changing the supply start conditions or the project’s execution schedule. The next operational step remains tied to the final investment decision and construction readiness.
The company says its demonstration plant in Arkansas has processed 1 million barrels of brine extracted directly from the Smackover formation and completed 15,000 direct lithium extraction cycles through April 22, 2026. It reported that tests of the technology designated for the southwest Arkansas project showed lithium recovery of more than 95% and rejection of major impurities of more than 99% in results announced during 2026. The results link demonstration-plant operations with performance indicators for the extraction process, while the commercial phase targets battery-grade lithium carbonate production. The test results alone do not mean the commercial project has begun production; it still requires a final investment decision before construction. The plant data show the scale of the pilot operations the company reported through the specified date.
Exxon Mobil is at a different stage from Standard Lithium’s project. The company said it had completed an appraisal well and seismic survey program in Arkansas, and that the work confirmed the presence of an attractive resource. It also announced that it had produced battery-grade lithium carbonate at its pilot facility in Texas from brine extracted in southern Arkansas. The company aims to become a leading supplier of lithium carbonate in North America in the first half of the 2030s. Its disclosure combines completed appraisal work, reported pilot production and a future supply target; that does not amount to an announcement of ongoing commercial production in the area. The company places its target within a timeframe extending to the first half of the next decade.
Chevron said it had acquired leases on land in the Smackover formation between northeast Texas and southwest Arkansas and intends to assess the lithium resource potential there. The company estimates its acquired land rights at about 135,000 net acres and says it will take a phased approach to expanding lithium development over the next decade, depending on market conditions. Its stated position is focused on assessing and developing the resource in stages, unlike Exxon’s announcement of pilot production or the progress of Standard Lithium’s specific project. In trading on November 6, 2026, Chevron shares closed at $212.61 and Standard Lithium shares closed at $1.46, according to EL7 data. These prices are the closing prices for that session and on their own do not compare performance across other sessions or provide evidence of the impact of the companies’ plans.
For the southwest Arkansas project, Standard Lithium expects construction to begin in 2026 shortly after a final investment decision, while targeting first commercial production in 2029. This schedule links the investment decision to construction and then production, making the decision the project’s next turning point. Until these stages are reached, the targeted capacity and long-term supply agreement remain contingent on commercial production starting. Exxon Mobil, meanwhile, aims to become a leading supplier in North America in the first half of the 2030s, while Chevron has outlined a phased approach to expansion over the next decade, depending on market conditions. These timelines show the different horizons for the project and the companies’ targets.