Sigma Lithium Announces Full Resumption of Mining-Industrial Operations; Signed a TAC Agreement with the State of Minas Gerais; Expects to Produce 240,000t Within 12 Months

About this update from Sigma Lithium Corporation

HIGHLIGHTSThe Company's industrial and mining operations returned to being fully back online following the signature of a TAC Agreement.Sigma Lithium remains focused on ramping up mining operations and advancing its expansion plans, as per its 2Q 26 announcement:240,000t of lithium oxide concentrate within 12 months; and330,000t production in FY 27.The Company has greenlighted the next stage of upgrades of the haulage fleet in cooperation with their manufacturer SANY. Expects to increase fleet haulage capacity with 75t trucks and 98t excavators.Toronto, Ontario--(Newsfile Corp. - August 21, 2026) - Sigma Lithium Corporation (NASDAQ: SGML) (TSXV: SGML) (BVMF: S2GM34) ("Sigma Lithium" or the "Company"), the largest producer of lithium oxide concentrate in the Americas¹ and dedicated to industrializing lithium materials to supply global producers of batteries for energy security in a responsible manner, announces that it has signed a Terms for Adjustment of Procedures agreement ("Termo de Ajuste de Conduta" or "TAC Agreement") with the State of Minas Gerais.MINING AND INDUSTRIAL OPERATIONS FULLY BACK ONLINEFollowing the signing of the TAC Agreement, Sigma Lithium's mining and industrial operations are fully back online, with the Company resuming its regular operating activities. The Company remains focused on ramping up mining operations and advancing its expansion plans, as per its 2Q 26 announcement:240,000t of lithium oxide concentrate within 12 months; and330,000t production in FY 27.Operations related to the sale of high-purity lithium fines consisting of reprocessed tailings, as well as other intermediate grade products, continued without disruption throughout the partial suspension of operations.The signing of the TAC Agreement reflects Sigma Lithium's continued engagement with Minas Gerais State authorities and the Company's unwavering commitment to operating under the highest environmental and regulatory global framework in the Vale do Jequitinhonha, producing the Quintuple Zero Lithium. During negotiations, Minas Gerais environmental authorities reviewed an extensive amount of factual and quantitative environmental technical documentation provided by the Company.Sigma Lithium estimates that the execution of the adjustments of environmental procedures under the TAC Agreement will require capex of approximately US$1,000,000. The Company agreed to the...

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