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Sigma Lithium Corporation files foreign issuer current reports that document operating and commercial updates for its lithium concentrate business. Its Form 6-K disclosures include earnings materials, production guidance, sales of high-grade lithium oxide concentrate and high-purity lithium fines, offtake agreements, and working-capital financing supported by bank guarantees or customer-backed arrangements.
The filing record also describes the Grota do Cirilo operation, the Greentech Industrial Plant, capacity-expansion disclosures, and sustainability-related operating practices such as dry stacking, water reuse, avoiding toxic chemicals, and renewable power. These disclosures connect reported financial results, commercial contracts, capital resources, and mine operations to the company's Brazilian lithium production platform.
Sigma Lithium has resumed mining at Mine 1 in Brazil as scheduled, with over 600 people working on site and a restructured, larger off-road equipment fleet designed to match its Greentech Industrial Plant capacity.
The company highlights Fines sales, where applying US$140/t to 950,000t of inventory could generate cash flow comparable to selling about 70,000t of high‑grade concentrate at US$1,800/t. Guidance scenarios show Phase 1 production of 220,000–270,000t in FY2026E and 520,000t for Phases 1 & 2 in FY2027E, with all‑in sustaining costs of US$599/t for Phase 1 and US$511/t for combined production, and illustrative cash flow ranging from $78M to $592M depending on realized lithium prices.
Sigma Lithium Corporation reported that it has sold an additional 100,000 tonnes of high purity lithium fines stored at the Port of Vitoria, priced at market levels referenced to the Shanghai Metals Market index, with an adjusted net final price of US$140 per tonne for 1% lithium oxide content.
The company reiterates that remobilization of its mining contractor, including equipment and personnel at its Brazilian mine, is proceeding as planned and is expected to conclude in January 2026, with operations continuing. Sigma Lithium notes that a mid-December administrative enquiry by Brazil’s Ministry of Labor and Employment into its waste piles, following a routine health and safety inspection, does not affect its ability to operate and was not considered material by management.
The company highlights its Greentech plant’s environmental features, including dry-stacked tailings, full water reuse, no toxic processing chemicals and 100% renewable power, and reminds investors it has nameplate capacity of 270,000 tonnes of lithium oxide concentrate annually at its Grota do Cirilo operation in Brazil and is building a second plant to double capacity.
Sigma Lithium reports several operational and governance updates. The company completed its first sale of 100,000 tonnes of high purity lithium fines stored at the Port of Vitoria, at market prices linked to the Shanghai Metals Market index, generating net revenues of approximately USD 11 million. It also has an additional 850,000 tonnes of high-purity lithium fines available for sale at its plant.
The company is advancing a remobilization plan at Mine 1 after restructuring mining operations in late 2025, combining company-led technical control with subcontracted execution and newly leased large-scale equipment that is expected to almost triple prior mining and earth-moving capacity. Sigma Lithium signed a working capital agreement with a major client tied to monthly sales totaling 70,500 tonnes by the end of 2026, with a first tranche of USD 5 million closed. The board appointed former Brazilian Minister of Agriculture Katia Abreu as an independent director, replacing Eugenio de Zagottis, while maintaining a majority-independent board and 40% female representation.
Fitpart Fund Administration Services Ltd. filed Amendment No. 2 to a Schedule 13G regarding Sigma Lithium Corporation and reports 0 common shares beneficially owned, representing 0% of the class. The filing identifies the reporting person as an investment adviser organized in the Bahamas and provides business addresses for both the issuer and the filer.
The statement says all securities referenced are directly owned by advisory clients of Fitpart and that none of those clients may be deemed to beneficially own more than 5% of the common shares. The filer also certifies the securities were not acquired to change or influence control of the issuer and disclaims beneficial ownership except to the extent of any pecuniary interest.