6-K
Sigma Lithium Corp (SGML)
UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549
FORM 6-K
REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR
15d-16 UNDERTHE SECURITIES EXCHANGE ACT OF 1934
For the month of August 2025
Commission File Number: 001-40786
Sigma Lithium Corporation
(Translation of registrant's name into English)
181, Bay Street, Suite 4400Toronto, Ontario, M5J 2T3, Canada
(Address of principal executive office)
Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
Form 20-F [ ] Form 40-F [ X ]
EXHIBIT INDEX
| Exhibit | Description |
|---|---|
| 99.1 | Press release dated August 15, 2025. |
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
| SigmaLithium Corporation | |
|---|---|
| (Registrant) | |
| Date: August 15, 2025 | |
| Ana Cristina Cabral Gardner | |
| Chief Executive Officer |
Exhibit 99.1 ****
SIGMA LITHIUM REPORTS 2Q25 RESULTS:
DELIVERS ON-TARGET PRODUCTION, FURTHER COSTREDUCTIONS AND DELEVERAGING
HIGH****LIGHTS
| · | Achieved 68,368t of lithium oxideconcentrate in 2Q25, a 38% year-on-year increase and slightly above the quarterly target of 67,500t. |
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| · | Maintained cost under control and below the target over previous quarter driven by economies of scale,stable plant gate costs, and efficient logistics: |
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| o | CIF China cash operating costs of $442/t in 2Q25, 12% below target of $500/t. |
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| o | All-in sustaining cash costs (AISC) totaled $594/t in 2Q25, 10% below target of $660/t. |
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| · | Reported gross sales revenue – lithium oxide concentrate of $21.1 million, 60.3% decrease comparedto 2Q24, reflecting a deliberate strategy to withhold product during intense price volatility, preserving pricing power and protectinglong-term margins. |
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| · | Advanced Plant 2 construction, completed key site preparation activities and advanced procurement strategyfor critical equipment, keeping the project on track to double nameplate capacity to 520,000 tonnes per year. |
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Conference Call Information
The Company will hold a conference call to discuss its financial results for the second quarter of 2025 at 8:00 a.m. ET on Friday, August 15, 2025. To register for the call, please proceed through the following link Register here (https://mzgroup.zoom.us/webinar/register/WN_nCrop-f3QkSOJ9It8F8u3w#/).
São Paulo, Brazil. August 15, 2025. Sigma Lithium Corporation(TSXV/NASDAQ: SGML, BVMF: S2GM34), a leading global lithium producer dedicated to powering the next generation of electric vehicles with carbon neutral, socially and environmentally sustainable lithium concentrate, reports its results for the second quarter ended June 30, 2025.
Ana Cabral, Co-Chairperson and CEO, commented: “Oursecond-quarter performance highlights the strength of Sigma Lithium’s low-cost, large-scale operations and disciplined commercialstrategy. We managed to further decrease our costs consolidating our operational resilience. We maintained production cadence at 68ktand are comfortably on track to deliver on our annual production target of 270kt while preserving pricing power in a volatile market —whileupholding some of the highest health and safety standards in the battery materials supply chain: we celebrated two years without accidentsor fatalities. These results demonstrate our ability to execute consistently, create value through market cycles, and reinforce our leadingposition as a global integrated industrial and mineral lithium producer.”
Table 1. Summary of Key Operational and FinancialMetrics
| Production and Sales | Unit | 2Q25 | 2Q24 | Var. Y/Y(%) | 1Q25 | Var. Q/Q(%) |
|---|---|---|---|---|---|---|
| Production Volumes | tonnes | 68,368 | 49,389 | 38% | 68,308 | 0% |
| Sales Volumes | tonnes | 40,350 | 52,572 | -23% | 61,584 | -34% |
| Average grade of shipped product | % of Li2O | 5.2 | 5.5 | -0% | 5.0 | 0% |
| COGS | $/t | 584 | 566 | 3% | 556 | 5% |
| Operating Cash Cost at Plant Gate ^(2)^ | $/t | 348 | 364 | -4% | 349 | -0% |
| Operating Cash Cost CIF China ^(2)^ | $/t | 442 | 515 | -14% | 458 | -3% |
| All-in Sustaining Cash Cost ^(2)^ | $/t | 594 | 779 | -24% | 622 | -4% |
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| Financial Performance | Unit | 2Q25 | 2Q24 | Var. Y/Y(%) | 1Q25 | Var. Q/Q(%) |
|---|---|---|---|---|---|---|
| Sales Revenue^(3)^ | $ 000s | 21,148 | 56,311 | -62% | 47,833 | -56% |
| COGS | $ 000s | (23,564) | (29,766) | -20% | (34,217) | -31% |
| Average Revenue per Tonne ^(3)^ | $/t | 524 | 1071 | -51% | 777 | -32% |
| EBITDA^(4)^ | $ 000s | (16,876) | 8,639 | -295% | 10,010 | -268% |
| Stock-based compensation | $ 000s | 200 | 1,943 | -110% | 1,416 | -114% |
| Adjusted EBITDA^(4)^ | $ 000s | (17,077) | 10,582 | -261% | 11,426 | -249% |
| Net Income | $ 000s | (18,857) | (10,848) | 73% | 4,728 | -499% |
| Cash and Cash Equivalents, at the end of the respective period | $ 000s | 15,113 | 75,330 | -80% | 31,111 | -51% |
Revenues and Production
Sigma Lithium reported revenues of $21.1 million for 2Q25, representing a 62% year-on-year decrease and a 56% decrease over 1Q25 revenues. Sales volumes totaled 40,350 tonnes in 2Q25, down 23% from 2Q24 and down 34% compared to 1Q25, primarily due to our disciplined commercial strategy, under which we temporarily withheld product from the market during periods of intense price volatility to preserve pricing power and protect long-term margins.
The Company reported production volumes of 68,368 tonnes in 2Q25, slightly higher than quarter production target of 67,500 tonnes, and 38% higher compared to 1Q24. The Company expects its FY25 production to reach 270,000 tonnes.
Costs
The Company reported a cost of sales of $23.6 million for 2Q25, reflecting a 20% decrease compared to 2Q24 and a 31% decrease compared to 1Q25. On a per-tonne basis, the cost of sales averaged $584 per tonne of product sold, which represents a 3% increase year-over-year and a 5% increase from 1Q25.
The Company’s operating cash costs remain among the lowest in the industry, with CIF China cash operating costs averaging $442/t. This represents a 3% decrease from $458/t in 1Q25 and remains 12% below the 2025 cost target of $500/t. This reduction was supported by economies of scale from higher production volumes, stable plant gate costs, efficient freight and port operations, and lower CIF charges — achieved despite the recognition of ocean freight expenses related to prior-quarter shipments.
All-in sustaining cost (AISC) decreased by approximately 4% to an average of $594/t, remaining below the full-year target of $660/t.
Balance Sheet & Liquidity
As of June 30, 2025, the Company’s cash and cash equivalents totaled $31.1 million, representing a 32% decrease from $45.9 million as of December 31, 2024, primarily driven by operational costs and expenses, as well as the deleveraging of trade finance lines.
The Company reduced its short-term trade finance by approximately $6 million in 2Q25, bringing the balance to $45.5 million as of June 30, 2025. The total amount of short and long-term debts was $166.9 million as of June 30, 2025. The net interest paid in 2Q25 totaled $0.8 million or approximately $12/t of quarterly production.
The Company is evaluating potential long-term prepayment and offtake agreements, in line with standard industry practices. To date, it has maintained full commercial flexibility, with 100% of its production uncommitted. Any agreements executed would form part of the Company’s strategy to optimize its capital structure and support Phase 2 funding alongside BNDES reimbursements.
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Operational and Phase 2 Expansion Updates
During the six-month period ended June 30, 2025, Sigma continued to progress on the Phase 2 expansion project, with completion of key site preparation activities including formal earthworks and terracing. The Company remains focused on de-risking execution through strategic alignment of Phase 2 with the proven flowsheet, engineering concepts, and supplier partnerships established in Phase 1.
In parallel, Sigma has undertaken a detailed review of procurement priorities and project execution strategy, reinforcing its commitment to value-driven capital allocation and operational excellence. This includes evaluating optimal timelines for the contracting of long lead equipment and engineering services that will ensure readiness for the next construction milestones.
The Phase 2 expansion remains a transformative opportunity for the Company, with expected additional production capacity of 250,000 tonnes per annum of 5.5% Green Lithium. Together with Phase 1, this would bring the total annual production capacity to 520,000 tonnes of lithium oxide concentrate at Grota do Cirilo.
The Company continues to leverage the synergies and learnings from Phase 1 to enhance the efficiency and sustainability of the Phase 2 implementation, with ramping-up scheduled for 2026.
Qualified Person Disclosure
Please refer to the Company’s National Instrument 43-101 technical report titled “Grota do Cirilo Lithium Project Araçuaí and Itinga Regions, Minas Gerais, Brazil” issued March 31, 2025, which was prepared for Sigma Lithium by Marc-Antoine Laporte, P.Geo, SGS Canada Inc., William van Breugel, P.Eng, SGS Canada Inc., Johnny Canosa, P.Eng, SGS Canada Inc., and Joseph Keane, P. Eng., SGS North America Inc. (the “Technical Report”). The Technical Report is filed on SEDAR and is also available on the Company’s website.
The independent qualified person (QP) for the Technical Report’s mineral resource estimates is Marc-Antoine Laporte P.Geo., M.Sc., of SGS Group in Quebec, Canada. Mr. Laporte is a Qualified Person as defined by Canadian National Instrument 43-101.
Other disclosures in this news release of a scientific or technical nature at the Grota do Cirilo Project have been reviewed and approved by Iran Zan MAIG (Membership number 7566), who is considered, by virtue of his education, experience and professional association, a Qualified Person under the terms of NI 43-101. Mr. Zan is not considered independent under NI 43-101 as he is Sigma Lithium Director of Geology.
Mr. Zan has verified the technical data disclosed in this news release not related to the current mineral resource estimate disclosed herein.
ABOUT SIGMA LITHIUM
Sigma Lithium (NASDAQ: SGML, TSXV: SGML, BVMF: S2GM34) is a leading global lithium producer dedicated to powering the next generation of electric vehicle batteries with carbon neutral, socially and environmentally sustainable chemical-grade lithium concentrate.
The Company operates one of the world’s largest lithium production sites—the fifth-largest industrial-mineral complex for lithium oxide—at its Grota do Cirilo Operation in Brazil. Sigma Lithium is at the forefront of environmental and social sustainability in the electric vehicle battery materials supply chain, producing Quintuple Zero Green Lithium: net-zero carbon lithium made with zero dirty power, zero potable water, zero toxic chemicals, and zero tailings dams.
Sigma Lithium currently produces 270,000 tonnes of lithium oxide concentrate on an annualized basis (approximately 38,000–40,000 tonnes of LCE) at its state-of-the-art Greentech Industrial Lithium Plant. The Company is now constructing a second plant to double production capacity to 520,000 tonnes of lithium oxide concentrate (approximately 77,000–80,000 tonnes of LCE).
For more information about Sigma Lithium, visit our website (https://sigmalithiumcorp.com/)
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FOR ADDITIONAL INFORMATION PLEASE CONTACT
Anna Hartley, Vice President Investor Relations
anna.hartley@sigmalithium.com.br
Sigma Lithium
| Sigma Lithium |
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| @sigmalithium |
| @SigmaLithium |
FORWARD-LOOKING STATEMENTS
This news release includescertain “forward-looking information” under applicable Canadian and U.S. securities legislation, including but not limitedto statements relating to timing and costs related to the general business and operational outlook of the Company, the environmental footprintof tailings and positive ecosystem impact relating thereto, donation and upcycling of tailings, timing and quantities relating to tailingsand Green Lithium, achievements and projections relating to the Zero Tailings strategy, achievement of ramp-up volumes, production estimatesand the operational status of the Grota do Cirilo Project, and other forward-looking information. All statements that address future plans,activities, events, estimates, expectations or developments that the Company believes, expects or anticipates will or may occur is forward-lookinginformation, including statements regarding the potential development of mineral resources and mineral reserves which may or may not occur.Forward-looking information contained herein is based on certain assumptions regarding, among other things: general economic and politicalconditions; the stable and supportive legislative, regulatory and community environment in Brazil; demand for lithium, includingthat such demand is supported by growth in the electric vehicle market; the Company’s market position and future financial and operatingperformance; the Company’s estimates of mineral resources and mineral reserves, including whether mineral resources will ever bedeveloped into mineral reserves; and the Company’s ability to operate its mineral projects including that the Company will not experienceany materials or equipment shortages, any labour or service provider outages or delays or any technical issues. Although management believesthat the assumptions and expectations reflected in the forward-looking information are reasonable, there can be no assurance that theseassumptions and expectations will prove to be correct. Forward-looking information inherently involves and is subject to risks and uncertainties,including but not limited to that the market prices for lithium may not remain at current levels; and the market for electric vehiclesand other large format batteries currently has limited market share and no assurances can be given for the rate at which this market willdevelop, if at all, which could affect the success of the Company and its ability to develop lithium operations. There can be no assurancethat such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated insuch statements. Accordingly, readers should not place undue reliance on forward-looking information. The Company disclaims any intentionor obligation to update or revise any forward-looking information, whether because of new information, future events or otherwise, exceptas required by law. For more information on the risks, uncertainties and assumptions that could cause our actual results to differ fromcurrent expectations, please refer to the current annual information form of the Company and other public filings available under theCompany’s profile atwww.sedarplus.com.
Neither the TSX Venture Exchange nor its Regulation ServicesProvider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy ofthis news release.
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Financial Tables
The unaudited condensed interim consolidated financial statementsfor the periods ended March 31, 2025 and 2024 were reviewed by the Company's independent auditor in accordance with IFRS Accounting Standards,as issued by the International Accounting Standards Board.
Figure 1: Consolidated Statements of Income (Loss) Summary
| Consolidated Statements of Income (Loss) | Three Months Ended<br><br> <br>June 30, 2024 | ||||
|---|---|---|---|---|---|
| (000s) | |||||
| Net sales revenue | 16,888 | 45,920 | |||
| Cost of goods sold & distribution | (23,564 | ) | (29,765 | ) | |
| Gross profit (loss) | (6,676 | ) | 16,155 | ||
| Sales expense | (183 | ) | (376 | ) | |
| G&A expense | (4,336 | ) | (4,603 | ) | |
| Stock-based compensation (1) | (472 | ) | (1,943 | ) | |
| ESG and other operating expenses | (8,491 | ) | (3,627 | ) | |
| EBIT | (20,158 | ) | 5,606 | ||
| Financial income and (expenses), net | 1,299 | (18,632 | ) | ||
| Income (loss) before taxes | (18,859 | ) | (13,026 | ) | |
| Income taxes and social contribution | — | 2,178 | |||
| Net Income (loss) for the period | (18,859 | ) | (10,848 | ) | |
| Weighted average number of common shares outstanding | 111,280 | 110,528 | |||
| Earnings per share | (0.17 | ) | $ | (0.10 | ) |
All values are in US Dollars.
(1) Excluding stock-based compensation allocated to operating costs. Starting January 1, 2025, the Company began allocating stock-based compensation for certain operational personnel directly to operating costs, in alignment with revised internal cost attribution practices. This change reflects a more accurate representation of total operating expenses. Prior to 2025, these costs were reported under general and administrative expenses.
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Figure 2: Consolidated Statements of Financial Position Summary
| Consolidated Statements of Financial Position | As of December 31, 2024 | ||
|---|---|---|---|
| (000s) | |||
| Assets | |||
| Cash and cash equivalents | 15,113 | 45,918 | |
| Trade accounts receivable | 16,765 | 11,583 | |
| Inventories | 24,566 | 16,140 | |
| Other current assets | 13,306 | 19,129 | |
| Total current assets | 69,750 | 92,771 | |
| Property, plant and equipment | 161,617 | 141,025 | |
| Other non-current assets | 104,834 | 93,322 | |
| Total Assets | 266,451 | 327,118 | |
| Liabilities & Shareholder Equity | |||
| Financing and export prepayment | 53,655 | 61,596 | |
| Suppliers & accounts payable | 44,325 | 32,627 | |
| Other current liabilities | 17,359 | 14,548 | |
| Total current liabilities | 115,339 | 108,771 | |
| Financing and export prepayment | 113,300 | 112,003 | |
| Other non-current liabilities | 15,639 | 14,004 | |
| Total non-current liabilities | 128,939 | 126,007 | |
| Total shareholders' equity | 91,923 | 92,340 | |
| Total Liabilities & Shareholders' Equity | 336,201 | 327,118 |
All values are in US Dollars.
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Figure 3: Cash Flow Statement Summary
| Consolidated Statements of Cash Flows | Six Months Ended June<br><br> <br>30, 2024 | ||||
|---|---|---|---|---|---|
| (000s) | |||||
| Operating Activities | |||||
| Net income (loss) for the period | (14,131 | ) | (17,757 | ) | |
| Adjustments, including FX movements | (18,703 | ) | 22,941 | ||
| Interest payment on loans and leases | 6,644 | (2,971 | ) | ||
| Adjustments to income (loss) for the period | (12,059 | ) | 19,970 | ||
| Change in working capital | 3,854 | (22,740 | ) | ||
| Net Cash from Operating Activities | (8,205 | ) | (42,710 | ) | |
| Investing Activities | |||||
| Purchase of PPE | (6,479 | ) | (11,185 | ) | |
| Addition to exploration and evaluation assets | (545 | ) | (2,361 | ) | |
| Other | (1,042 | ) | (349 | ) | |
| Net Cash from Investing Activities | (8,066 | ) | (13,895 | ) | |
| Financing Activities | |||||
| Proceeds of loans, net | (16,642 | ) | 93,768 | ||
| Other | (1,226 | ) | (773 | ) | |
| Net Cash from Financing Activities | (17,868 | ) | 92,955 | ||
| Effect of FX | 3,344 | (9,644 | ) | ||
| Net (decrease) increase in cash | (30,805 | ) | 26,746 | ||
| Cash & Equivalents, Beg of Period | 45,918 | 48,584 | |||
| Cash & Equivalents, End of Period | 15,113 | 75,330 |
All values are in US Dollars.
Footnotes:
To provide investorsand others with additional information regarding the financial results of Sigma Lithium, we have disclosed in this release certain non-IFRSoperating performance measures such as unit operating costs, EBITDA, EBITDA margin, Adjusted EBITDA, and Adjusted EBITDA margin. Thesenon-IFRS financial measures are a supplement to and not a substitute for or superior to, the Company's results presented in accordancewith IFRS. The non-IFRS financial measures presented by the Company may be different from non-GAAP/IFRS financial measures presentedby other companies. Specifically, the Company believes the non-IFRS information provides useful measures to investors regarding the Company'sfinancial performance by excluding certain costs and expenses that the Company believes are not indicative of its core operating results. Thepresentation of these non-U.S. GAAP/IFRS financial measures is not meant to be considered in isolation or as a substitute for resultsor guidance prepared and presented in accordance with U.S. GAAP/IFRS. A reconciliation of these financial measures to IFRS resultsis included herein.
1. Cash unit operating costs include mining, processing, andsite based general and administration costs. It is calculated on an incurred basis, credits for any capitalised mine waste developmentcosts, and it excludes depreciation, depletion and amortization of mine and processing associated activities. When reported on an FOBbasis, this metric includes road freight, and port related charges. When reported on a CIF basis it includes ocean freight, insuranceand royalty costs. Royalty costs include a 2% government royalty and a 1% private royalty.
For CIF operating cost analysis purposes, the Company usesthe ocean freight costs of products that sailed during the reporting period. However, for accounting purposes, and therefore in this quarter’sreported cost of good sold and revenues, ocean freight is treated as a service provided to a customer and is recognized when the productis delivered.
Cash unit all-in sustaining cost includes unit CIF China cashoperating cost, SG&A, maintenance capex and financial expenses.
2. Cash operating profit represents revenue less cost of sales(COGS), excluding depreciation and amortization (D&A) expenses. Cash operating margin is cash operating profit divided by total revenuefor the period.
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3. Average revenue per tonne is calculated as total revenuefor the period divided by total sales volume in tonnes. Average COGS per tonne is calculated as total cost of sales (COGS) for the perioddivided by total sales volume in tonnes.
4. Adjusted EBITDA is a measure of the Company's recurringcore earnings profile. It is calculated as revenue minus cash operating and selling expenses. The calculation excludes non-cash itemssuch as depreciation and amortization (D&A) and stock-based compensation expenses. Adjusted EBITDA margin is calculated by dividingAdjusted EBITDA by total revenue for the period.
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