Slide 1: Fourth Quarter 2025 Earnings Release Presentation
Fourth Quarter 2025 Earnings Release Presentation 30th of March 2026 : SGML : SGML : S2GM34
Slide 2: Disclaimer
Disclaimer No Offer or Solicitation Regarding Securities This presentation has been prepared by Sigma Lithium Corporation (“Sigma”) for general information purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any securities of Sigma or its affiliates in any jur
Slide 3: Disclaimer
Disclaimer (…) to risks associated with its reliance on consultants and others for mineral exploration and exploitation expertise; The current COVID-19 pandemic could have a material adverse effect on Sigma’s business, operations, financial condition and stock price; If Sigma is unable to ultimately
Slide 4: Sigma Lithium is the Largest Industrial-Mineral Producer in The Americas
Sigma Lithium is the Largest Industrial-Mineral Producer in The Americas: Operational Excellence, Low Cost, High Growth Management owner-operator fully aligned with shareholders to build long term value Competitive advantage: resilience 5th Largest industrial mineral 100% Sustainable: Quintuple Zero
Slide 5: Economic Development Engine of Vale do Jequitinhonha
Sigma Lithium is The Economic Development Engine of Vale do Jequitinhonha, Lifted Towards Prosperity: Key Region of Minas Gerais 1,000 11,000 21,000 Beneficiaries (Microcredit & Direct Jobs Indirect Jobs Small Scale Agriculture) 18,000 85% 50% People With Access to Economically Active Regional Workf
Slide 6: Sigma is "Built to Last": a Resilient Company Through Lithium Price Cycles
Sigma is “Built to Last”: a Resilient Company Thriving Throughout Lithium Price Cycles Large Scale Production 1. Speed of Execution 2. Low Capex to Build 3. Low-Cost Operating Country Traceability: Zero Accidents & Low Production Cost Highest Environmental Standards page 6
Slide 7: Operational and Financial Highlights of 2025 and 1Q26
Operational and Financial Highlights Of 2025 and 1Q26
Slide 8: Unparalleled Resilience: Generated Cash Flows Across 2025 Lithium Volatility
Sigma Lithium Unparalleled Resilience: Generated Cash Flows Across 2025 Lithium Volatility – Our Business is “Built to Last” 1. Signed US$146M In Offtake Agreements With Robust “Intrinsic Value” ▪ US$96M for 70,500t to be delivered in 2026 ▪ US$50M for 40,000t to be annually delivery within 3 years
Slide 9: Proven Industrial Cleantech-Enabled "Sustainability Premium"
Sale of Lithium Fines Represented Significant Revenues Proven Industrial Cleantech-Enabled “Sustainability Premium” page 9
Slide 10: New Offtake Agreements
Offtake Agreements: Enable Mining Upgrade, LT Debt Repayment and Capacity Expansions Annual Agreed US$ M Description Use of Proceeds Status Volume Upon Term New 3 years Conventional offtake with 40,000t (120,000t) US$50M prepayment Growth strategy 2025 (1) Prepayment of production 70,500t 1 Year US$
Slide 11: Competitive Advantage of Low Costs: CIF China Cost Curve
Competitive Advantage of Low Costs: Create Resilience From Price Pressures of New Regions and Refining Innovation Hard-Rock Lithium CIF China Cost-Curve (1) 1,400 Total Cash Cost Dec 25 ($1,200) Actual Guidance 1,200 CIF China US$/t Cost of Lithium Concentrate (US$ per tonne) 1,000 Sep 25 ($800) $11
Slide 12: 966+ Consecutive Days Over 2.7 Years with Zero Accidents
Over 2.7 Years with ZERO Accidents and Fatalities Highest operational global safety standards in the industry achieved in tandem with low costs One of the World’s Best Safety Records • Employee engagement & strict safety processes • Direct connection to factory floor • Enhanced performance • Constan
Slide 13: Operational Excellence: Unique Resilience and Robust Cash Flows
Operational Excellence: Unique Resilience and Robust Cash Flows (US$ millions) Offtake Debt repayment Lithium materials Cash flow agreements (deleveraging) production signed FY25 4Q25 Premium Fines 1Q26E (high grade) (low grade) $96M 60% $31M 183,000t + 70,000t Prepayment during 2026 Short-term debt
Slide 14: Revenues in 4Q25 Resulted From Optimum Commercial Strategy
Revenues in 4Q 25 Resulted From Optimum Commercial Strategy Pricing strategy efficiently captured seasonality Sigma Lithium Final Prices vs Provisional Prices (US$/t) Provisional Price Final Price SC6 Lithium Concentrate 1400 1300 Lithium Prices Volatility: Generated by Tariffs Uncertainty 1200 1100
Slide 15: Financial Discipline: High Operating Cash Margins
Financial Discipline: High Operating Cash Margins (US$ millions) Operating Net sales revenues Cash Gross Quarterly Annual Margin Margin $151 4Q25 FY25 $110 $48 $44 $17 $29 $17 1Q25 2Q25 3Q25 4Q25 1Q26E 2024 2025 Operating costs + SG&A + ESG + others 47% 17% 4Q25 FY25 Quarterly Annual $145 17% 21% $3
Slide 16: Financial Disciplined Execution: Significantly Deleveraged
Financial Disciplined Execution: Significantly Deleveraged, Despite Price Volatility Short-Term Debt Facilities (US$ Millions) $ 120 70.00% -68% $101 60.00% $ 100 Interest Rate per Year $90 -60% Trade Finance (US$ M) 50.00% $ 80 40.00% $59 $60 -49% $ 60 $51 30.00% $43 $ 40 $37 20.00% $24 $ 20 $19 9.
Slide 17: Cashflow Generation Outlook
Cashflow Generation Outlook Low-cost position makes Sigma Lithium resilient to lithium market volatility Estimated 12 Estimated Estimated Production Volumes and Costs per Tonne (US$/t) Month Period FY2027E FY2028E (Phase 1) (Phases 1 & 2) (Phases 1, 2 & 3) Production volumes 240,000t 520,000t 770,00
Slide 18: Operating Cash Generation Cash Flow Bridge
Disciplined Execution Created Operational Resilience Despite Market Conditions: Operating Cash Generation Cash flow bridge (US$ Millions) Financial discipline = conserved cash Increased cash by 100% 3 $14 Cash flow from operations: 5 $50 (1) $31M $6 ($10) ($4) 1 3 $30 ($24) 6 $32 $35 ($16) 2 ($10) (
Slide 19: Restructured Mining Operations: Preparing for Capacity Expansion
Restructured Mining Operations: Preparing for Capacity Expansion of Second and Third Plants
Slide 20: Fully Integrated Industrial and Mineral Operation
Sigma Lithium: Fully Integrated Industrial and Mineral Operation, Proprietary Industrial Cleantech Technology to Produce Clean Lithium Greentech Industrial Plant: 100% Owned Mines: • Advanced Clean Technology Industrial Lithium Production • 150Mt @ 1.4% Li2O Plant • 70% Recovery Integrated 100% x pa
Slide 21: Greentech Plant
Greentech Plant page 121
Slide 22: Mining Upgrade and Restructuring to Monetize Greentech Industrial Plant 3.0
Mining Upgrade and Restructuring Paramount to Monetize Investments in Greentech Industrial Plant 3.0 Plant 2.0 – 2023 Module 3: Tailings dry-stacking and total reengineering of the water reusage circuit Plant 3.0 – Current Module 1: Increase in efficiency Module 2: Optimization of recoveries via rep
Slide 23: Greentech 3.0 = Industrial Automation + Software Algorithms
Greentech 3.0 = Industrial Automation + Software Algorithms Implementing AI in the SCADA system : • Detection of Anomalies • Correction Recommendations • Self Learning Metallurgy from Mineralogy
Slide 24: Successfully Transitioned Mine from Third Party Contractor
Operations: Successfully Transitioned Mine from Third Party Contractor to Fully Controlled Greentech Plant Continued To Operate ▪ Reprocessed lithium materials in dry stacked tailings during 4Q25 and 1Q26 with superior recovery ▪ Resumed delivering high grade premium lithium oxide in 1Q26 ▪ Average
Slide 25: MineTech: Software for Mining Operational Efficiency
MineTech: Implementation of Software for Mining Operational Efficiency = Upgrade & Restructuring ▪ Mine Planning ▪ Fleet & Fuel Control ▪ Cost Control ▪ Load & Blasting Simulation page 25
Slide 26: Upgrade, Modernization and Capacity Increase of Mining Fleet
Upgrade, Modernization and Capacity Increase of Mining Fleet • Upgrade to in-house operation replacing third party contractor • Larger machinery = more productivity • Ongoing larger equipment deployment • Leased equipment reduced operating costs page 26
Slide 27: Expansion to Resume in 2026
Expansion to Resume in 2026: Double Industrial Lithium Oxide Production Capacity
Slide 28: Funded to Close to Double Installed Industrial Production Capacity
Expansion: Funded to Close to Double Installed Industrial Production Capacity of Premium Lithium Oxide Concentrate in 2026 Annual Installed Industrial Capacity (Tonnes of high-grade premium lithium oxide concentrate) Production Production: 2027 FY 2028 FY 2026E 12 Months (Production Capacity) (Produ
Slide 29: Double Production with US$80 million Capex, Triple with Another US$100 million
Sigma Lithium Can Double Production with US$80 million in Capex and Triple With a Third Line With Another US$100 million 2025 Production Capacity (in kt LCE) Peer 1 200 Peer 2 180 Peer 3 120 Sigma 2028 104 Peer 4 90 Triple Production +49% Capex: US$ 100 million Peer 5 80 Sigma 2027 70 Peer 6 66 Doub
Slide 30: Existing Infrastructure and Mining Operations to Expedite Plant 2
Existing Infrastructure and Mining Operations of Plant 1 To Expedite the Construction of Plant 2 Construction Progress P1 P2 Water Pipelines In Place Power Substation In Place Moving High Voltage Power Lines In Place Sewage Water Treatment Plant In Place Support Infrastructure In Place Pre-Strip Min
Slide 31: Well Positioned to Deliver Substantial Returns to Shareholders in 2026
Sigma Lithium is Well Positioned to Deliver Substantial Returns to Shareholders in 2026
Slide 32: Cash Flow Generation and Growth Position it for a Re-Rate
Sigma Continued Cash Flow Generation, Production Cadence and Growth to 520,000t (Phase 2) Position it for a Re-Rate Market Cap(1) 2026 Production Guidance 845kt 90 0kt $1 2,0 00 M 80 0kt $1 0,0 00 M $9,650 M 70 0kt Disconnect 60 0kt $7,230 M $8 ,00 0 M 50 0kt $6 ,00 0 M 470kt 40 0kt 408kt 30 0kt $3,
Slide 33: Demonstrated Operational Discipline: Delivered on All Fronts
Demonstrated Operational Discipline: Delivered on All Fronts Resume Steady State Deleveraged Repaid Production from Mining Debt Operations: Cadence 2026 Increased Operating 2025 Cash Margins Close Offtake Transactions Signed New Revenues: Lithium Fines Receive Development Bank Funding for Expansion
Slide 34: Q&A
Q&A
Slide 35: Appendix
Appendix
Slide 36: Suppliers Down 16% in 4Q25 From 3Q25 to US$22M
Suppliers Down 16% in 4Q25 From 3Q25 on a Net Basis to US$22M US$ Millions Net suppliers 70.0 M (1) In dispute (2) 60.0 M In dispute subject to reclassification 50.0 M 19.2 M 40.0 M 12.9 M 25.6 M 10.8 M 30.0 M 6.3 M 9.4 M 8.0 M 5.6 M 6.1 M 2.0 M 20.0 M 23.4 M 26.2 M 10.0 M 20.7 M 21.7 M 21.9 M 0.0 M
Slide 37: Strong Production Cadence Profile
Strong Production Cadence Profile Commercial strength enabled decision to store production during a few weeks of intensive price volatility Production Volume Production Sales Annualized Production 308kt 273kt 274kt Average: 240kt 240kt 216kt 196kt 176kt 77kt 74kt 68kt 62kt 68kt 54kt 53kt 60kt 57kt 4
Slide 38: Sigma Lithium
W\4 SIGMA LITHIUM