{"filing":{"accession_number":"0001171843-26-006703","cik":"0001537137","ticker":"SLI","company_name":"STANDARD LITHIUM LTD.","form":"6-K","filing_date":"2026-10-20","report_date":"2026-10-20","primary_document":"f6k_102026.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1537137/000117184326006703/f6k_102026.htm"},"events":[{"id":36273,"run_id":33439,"accession_number":"0001171843-26-006703","anchor_item_number":"EX-99.1","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"summary":"Standard Lithium announced the filing of a Preliminary Economic Assessment (PEA) for the Franklin lithium project in East Texas, a partnership with Equinor. The PEA discloses attractive project economics (NPV8 of $5.9 billion, IRR of 25.7%, 3-year payback) and contemplates 70,000 tonnes annual production capacity beginning in the early 2030s. This is a material operational/strategic milestone advancing the project toward a Preliminary Feasibility Study, representing significant progress on the company's flagship development initiative. While not a discrete M\u0026A transaction or financial event, this project advancement would materially affect a reasonable investor's assessment of the company's near-term development prospects and value creation potential.","company_name":"STANDARD LITHIUM LTD.","ticker":"SLI","filing_date":"2026-10-20","form":"6-K","submitted_at":null,"items":[{"id":40634,"accession_number":"0001171843-26-006703","item_number":"EX-99.1","item_title":"exh_991.htm","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"Standard Lithium announced the filing of a Preliminary Economic Assessment (PEA) for the Franklin lithium project in East Texas, a partnership with Equinor. The PEA discloses attractive project economics (NPV8 of $5.9 billion, IRR of 25.7%, 3-year payback) and contemplates 70,000 tonnes annual production capacity beginning in the early 2030s. This is a material operational/strategic milestone advancing the project toward a Preliminary Feasibility Study, representing significant progress on the company's flagship development initiative. While not a discrete M\u0026A transaction or financial event, this project advancement would materially affect a reasonable investor's assessment of the company's near-term development prospects and value creation potential.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-10-20T11:45:38.506779+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":40634,"accession_number":"0001171843-26-006703","item_number":"EX-99.1","item_title":"exh_991.htm","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"Standard Lithium announced the filing of a Preliminary Economic Assessment (PEA) for the Franklin lithium project in East Texas, a partnership with Equinor. The PEA discloses attractive project economics (NPV8 of $5.9 billion, IRR of 25.7%, 3-year payback) and contemplates 70,000 tonnes annual production capacity beginning in the early 2030s. This is a material operational/strategic milestone advancing the project toward a Preliminary Feasibility Study, representing significant progress on the company's flagship development initiative. While not a discrete M\u0026A transaction or financial event, this project advancement would materially affect a reasonable investor's assessment of the company's near-term development prospects and value creation potential.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-10-20T11:45:38.506779+00:00","company_name":"STANDARD LITHIUM LTD.","ticker":"SLI","filing_date":"2026-10-20"}]}