Welcome to our dedicated page for Sigma Lithium Corporation SEC filings (Ticker: SGML), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
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 Corporation is calling a virtual-only annual shareholder meeting for June 30, 2026, at 11:00 a.m. Toronto time, accessible via live audio webcast. Shareholders of record on May 26, 2026 may vote online or by proxy on routine matters.
The agenda includes fixing the Board at five directors, electing the listed nominees, and appointing Grant Thornton Auditores Independentes Ltda. as auditors. The circular outlines detailed proxy procedures, governance practices, and an equity incentive plan covering up to 18,120,878 common shares out of 112,064,646 shares outstanding.
Sigma Lithium Corporation filed a legal appeal against a decision by a local court in Aracuai, Brazil, that includes the potential for a US$10 million legal collateral if charges ultimately result in a final negative ruling after all appeals. The Company states that no payments are currently due and that similar cases often take years to conclude. Sigma Lithium says the ruling is unwarranted, notes that authorities recently visited its operations and, according to the Company, verified conformity with Brazilian environmental rules. It also reports strong community backing, citing thousands of supportive attendees at prior public hearings. The Company links a negative online “fake news” campaign and a 15% share price drop to the period immediately after it reported record earnings for 1Q26.
Sigma Lithium Corp ownership disclosure: Van Eck Associates Corporation reports beneficial ownership of 5,705,514 common shares of Sigma Lithium Corp as of 03/31/2026. The filing states this represents 5.12% of the class and that Van Eck has sole voting and dispositive power over these shares.
Sigma Lithium Corporation reports strong operational and safety performance while responding to recent media coverage. The company has achieved 1,010 days without accidents and continues to report zero fatalities since operations began 14 years ago. Mining is fully ramped and on track to meet guidance of 240,000 tonnes per year of lithium oxide concentrate, supported by large-scale truck and excavator fleets and more than 1,000 direct jobs.
The company highlights its cleantech “Greentech Industrial Plant,” which uses dense media separation without drinking water or toxic chemicals, runs on 100% renewable power and uses dry stacked tailings that can be reprocessed or sold. Sigma Lithium expects to reach full circularity next quarter, aiming to be among the first zero mining waste battery material sites. It also notes a small R$10,000 (about US$2,000) fine from Brazil’s Ministry of Labor and Employment tied to an administrative enquiry regarding certain waste piles, which it states does not materially affect operations, and references a prior technical note from Brazil’s mining regulator attesting to the safety of its waste rock piles. The company characterizes recent negative media reports as inaccurate and points out they coincided with a surge in put option volumes and a 6.5% share price drop.
Sigma Lithium Corporation will release its first quarter 2026 earnings results before the market opens on Friday, May 15, 2026, and hold a webcast conference call at 8:30 a.m. EST the same day.
The company describes itself as the largest producer of lithium oxide concentrate in the Americas, operating the Grota do Cirilo complex in Brazil with nameplate capacity of 270,000 tonnes of lithium oxide concentrate annually, or about 38,000–40,000 tonnes of lithium carbonate equivalent. Sigma Lithium highlights its Greentech Industrial Plant, which reuses 100% of water, uses no toxic chemicals, has zero tailings and runs on 100% renewable electricity. A Phase 2 expansion has been initiated to nearly double production capacity to 520,000 tonnes.
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.