Sigma Lithium Corporation (NASDAQ: SGML | TSXV: SGML | ASX: SAU) announced on October 1, 2026 that all mining and industrial production at its Grota do Cirilo operation in Brazil was temporarily suspended on September 30, following a 15-day delay by Brazil's Federal Court of Appeals in reviewing the company's emergency legal motion. The suspension stems from a preliminary injunction issued in an NGO lawsuit seeking cancellation of the company's environmental licences. Despite the stoppage, Sigma Lithium confirmed it maintains its FY 2027 production guidance of 330,000 tonnes of lithium oxide concentrate, though its 12-month guidance of 240,000 tonnes will be postponed by three months.

Key Points

  • Sigma Lithium Corporation (NASDAQ: SGML | TSXV: SGML | ASX: SAU)
  • All mining and industrial production temporarily suspended on September 30, 2026, pending a Federal Court of Appeals ruling on the company's Emergency Motion For Suspensive Relief
  • FY 2027 guidance of 330,000 tonnes maintained; 12-month guidance of 240,000 tonnes postponed by three months
  • Investors may be watching the Federal Court of Appeals ruling and any secondary appeal proceedings for operational clarity

Legal Dispute Behind the Grota do Cirilo Suspension

The suspension follows a preliminary injunction issued by a local Federal Court in Teofilo Otoni in a lawsuit filed by NGO Ngolo, which requested Minas Gerais state authorities to suspend Sigma Lithium's environmental licences. The company states its legal defence demonstrates that its Grota do Cirilo complex sits outside Quilombola community boundaries and beyond legally defined environmental impact distances. Sigma Lithium contends it did not receive legal communication regarding the preliminary ruling until almost one week after it was issued, and that the ruling was made without technical evidence supporting imminent operational impacts on the Quilombola community.

Cash Flow Strategy During the Production Pause

Sigma Lithium stated it will maintain commercial and recycling operations throughout the suspension period, including the sale of high-purity lithium fines derived from its dry-stacked tailings circularity process. The company said it expects these activities to generate sufficient cash flow to self-fund operations during the temporary halt. The release states the suspension will generate significant negative economic impact across 12 municipalities in the Vale do Jequitinhonha, a region where the company reports contributing to 19,000 direct and indirect jobs and benefiting approximately 80,000 people.

FY 2027 Guidance Maintained Despite Near-Term Delay

Despite postponing its 12-month guidance of 240,000 tonnes by three months, Sigma Lithium confirmed that its FY 2027 target of 330,000 tonnes of lithium oxide concentrate remains unchanged. The company also noted existing Phase 2 and Phase 3 expansion plans targeting annual capacities of 580,000 tonnes and 830,000 tonnes respectively, though the release states Phase 2 is planned to resume in 2027. In the event of a negative ruling by the Federal Court of Appeals, the company stated it intends to pursue a secondary appeal in Brazil's superior federal courts.