Sigma Lithium Corporation SEC Filings

Sigma Lithium Corporation signed a US$100 million collateralized bank guarantee with a major Brazilian bank. This guarantee is intended to support construction and installation of the Company’s Greentech Industrial Plant 2, which would increase annual nameplate production capacity of high-grade lithium oxide concentrate from 270,000 tonnes to 520,000 tonnes.

Plant 2 is expected to replicate the environmentally focused technologies of Plant 1, including dry stacking, 100% water reuse, zero toxic chemicals and 100% renewable electricity. The guarantee is subject to completion of definitive agreements consistent with an agreed letter of intention among the parties.

Sigma Lithium Corporation filed its annual Form 40-F for the fiscal year ended December 31, 2025, disclosing 111,402,979 common shares outstanding as of December 31, 2025. The filing references its Annual Information Form, MD&A, and audited consolidated financial statements as exhibits and identifies Grant Thornton Auditores Independentes Ltda. as auditor.

The Board confirms an audit committee financial expert, affirms its code of ethics with no waivers for 2025, and notes differences between Canadian and U.S. reporting practices including use of IFRS and NI 43-101 mineral disclosure standards.

Sigma Lithium reported strong cash generation and new sales contracts as it released results for the three and twelve months ended December 31, 2025. In 4Q25, the company generated US$31 million in cash from operations, with cash and equivalents at US$6.2 million at quarter-end and US$12 million as of March 30, 2026. Cash inflows were US$35 million in 1Q26 and are expected to reach US$96 million in 2Q26.

The company signed two offtake agreements for high grade premium lithium oxide concentrate, including a US$96 million prepayment for 70,500 tonnes in 2026 and a US$50 million prepayment for 40,000 tonnes per year over three years starting in 2026. Sigma Lithium achieved approximately US$67 million in net sales revenues across 4Q25 and 1Q26 and reported a 47% operating cash margin in 4Q25, supported by a 77% decline in operating costs versus a 64% drop in net sales revenues.

In 2025, trade finance debt was reduced by 60% from 2024 and total debt declined by 35% to US$141 million, including a US$100 million loan the company expects to pay down in 2026 using offtake proceeds and cash generation. Looking ahead, Sigma Lithium expects to produce 240,000 tonnes of high grade premium lithium oxide concentrate over the next twelve months at an all-in sustaining cost of US$592 per tonne, with forecast annual cash flow ranging from US$158 million to US$258 million depending on realized lithium prices.

Sigma Lithium Corporation, a major producer of lithium oxide concentrate in the Americas, will host its 2025 full year earnings presentation call on March 30, 2026 at 7:30 a.m. EST, shortly after releasing results. The call will be accessible via live webcast, with a recording available about an hour later through the company’s investor relations website.

The company operates the Grota do Cirilo complex in Brazil, described as one of the world’s largest lithium production sites. Sigma Lithium highlights its Greentech Industrial Plant, which uses dry stacking, reuses all water, relies on renewable electricity and avoids toxic chemicals. It reports a nameplate capacity of 270,000 tonnes of lithium oxide concentrate per year, equivalent to roughly 38,000–40,000 tonnes of lithium carbonate equivalent, and has started building a second plant intended to double production capacity.

Sigma Lithium Corporation reports it has resumed sales of high-grade premium lithium oxide in 1Q26, reaching an industrial production cadence. The company expects gross revenue from approximately 28,000 tonnes of high-purity premium lithium oxide at a grade-adjusted price of about US$1,712 per tonne.

Sigma has also closed its inaugural sale of 400,000 tonnes of high-purity lithium fines at a fixed plant-gate price of US$50 per tonne, which is expected to generate around US$20 million in profit. The company retains about 300,000 tonnes of high-purity lithium fines inventory, projected to yield at least an additional US$15 million in profit, highlighting a new revenue stream from reprocessed tailings via its Greentech technology.

Sigma Lithium Corporation is notifying investors that it will release its fourth quarter 2025 earnings results before the market opens on Monday, March 30, 2026. The company will host a webcast conference call the same day at 8:30 a.m. EST to discuss the results.

Sigma Lithium operates the Grota do Cirilo lithium project in Brazil and describes itself as a leading global producer focused on socially and environmentally sustainable lithium oxide concentrate. It currently has nameplate capacity to produce 270,000 tonnes of lithium oxide concentrate annually and has started building a second plant to increase capacity to 520,000 tonnes.

Sigma Lithium Corporation issued 12‑month production and cost guidance for its Grota do Cirilo operation and outlined longer‑term targets ahead of a presentation at the 2026 BMO Global Metals, Mining & Critical Minerals Conference.

The company targets lithium oxide concentrate production of 220,000 tonnes for the coming 12‑month run‑rate period from Phase 1, rising to 270,000 tonnes and then 520,000 tonnes for estimated FY2027E with Phases 1 and 2. All‑in sustaining cost is guided at US$599 per tonne for Phase 1 and US$511 per tonne at full 520,000‑tonne capacity, based on a CIF China cash cost of US$440 per tonne. At realized lithium prices of US$1,000, US$1,400 and US$1,800 per tonne, the company forecasts annual cash flow of US$78 million, US$156 million and US$233 million for Phase 1, and up to US$225 million, US$408 million and US$592 million respectively at 520,000 tonnes.

Sigma Lithium reported two key commercial developments. The company sold 150,000 tonnes of low-grade lithium fines at a net final price of US$140/t, and granted the buyer an option to purchase an additional 350,000 tonnes at market prices upon delivery at the Port of Vitoria.

The company highlighted that successful sales of this Low Grade Product can generate proceeds equivalent to selling 70,000 tonnes of its High Grade Lithium Concentrate. Sigma Lithium also activated a production-backed revolving prepayment facility of US$96 million, tied to supplying 70,500 tonnes of High Grade Lithium Concentrate during 2026.

Under this revolver, fixed prepayment installments of US$8 million are made 30 days before production and delivery, bearing interest of SOFR plus 1% for 30 days. Sales prices are set to match prevailing spot market prices, preserving exposure to lithium price upside while supporting near-term liquidity.

Sigma Lithium reports that Brazil’s National Mining Agency has issued an official technical statement affirming the safety of the company’s waste piles. After drone and on-site inspections on January 20, the regulator found no geotechnical anomalies and no legal basis for precautionary closure measures.

The company reiterates that a separate administrative enquiry by the Ministry of Labor and Employment is not considered material to its ability to continue mining operations. Management says market volatility and confusion around its waste and tailings piles stem from disinformation, including phishing using fake government domains, and notes it is engaging with authorities such as FINRA.

Sigma Lithium explains that its “waste piles” are mainly hard schist rock from mining, distinct from dry-stacked lithium fines generated by its Greentech Industrial Plant, which it can sell and reinvest, and highlights its focus on environmentally sustainable lithium production at the Grota do Cirilo operation in Brazil.