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Sigma Lithium Announces 2Q 24 Results: Reduced Cash Costs BY 22%, Increased Fob Margins to 54% Achieving Guidance Ahead of Schedule 2Q Operational Highlights (USD)

Production Results Financials

SIGMA LITHIUM ANNOUNCES 2Q 24 RESULTS: REDUCED CASH

COSTS BY 22%, INCREASED FOB MARGINS TO 54%

ACHIEVING GUIDANCE AHEAD OF SCHEDULE

2Q OPERATIONAL HIGHLIGHTS (USD)

• Sigma Lithium achieved “ all-around” operational efficiency in 2Q24, reaching metrics of larger

seasoned producers:

o Further increased cadence of volumes sold of Quintuple Zero High Purity Lithium Concentrate

(“5.0 Green Lithium”)

o Achieved sales volumes of 52,572t in 2Q24

• The Company expects total production of 5.0 Green Lithium in 3Q 24 of 60,000t

• Continues to increase sales price premium relative to peer lithium producers:

o Maintained average of 10% price premiumization year to date

• Established track record of delivering high quality lithium materials to leading supply chains, increasing

commercial assertiveness and flexibility

o Diversified commercial relationships by selling and engaging with new South Korean industrial ,

trading and battery manufacturing companies

o Sigma’s 11th shipment sold to a large Japanese large industrial conglomerate

• Implemented culture of excellence and high standards, driving overall productivity and top global

indexes of employee safety & health:

o 1 Year: ZERO fatalities, ZERO acidentes

o 2nd place amongst world’s largest metals and mining companies (ICMM ranking)

2Q FINANCIAL HIGHLIGHTS (USD)

• Revenues from volumes of lithium concentrate sold in 2Q totaled $54.4 million

o Reported revenue totaled $45.9 million

• Achieved cost guidance ahead of schedule: 22% reduction in unit cash costs year to date, amongst the

lowest in the sector

o CIF equivalent (1) cash costs of $515/t / (2024 Guidance: $510/t)

o FOB cash costs of $424/t / (2024 Guidance: $420/t)

o Cash costs at industrial plant gate averaging $364/t / (2024 Guidance: $370/t)

• Robust adjusted cash EBITDA margins of 29%, up from 16% in 1Q 24

• Consistent operational performance and reliability of monthly shipments results in robust access to

liquidity via export-linked credit lines at attractive interest rates:

o Comfortable liquidity position with cash balances as of August 14 of $99 million

o Decreased cost of debt linked to export financing:

▪ From 15% per year in Jan. 24 to <6% per year (in USD)

Conference Call Information

The Company will conduct a conference call to discuss its financial results for the second quarter at 8:00 a.m.

EST on Friday, August 16, 2024. Participating in the call will be Co-Chairperson and Chief Executive Officer, Ana

Cabral and the Executive Vice President for Corporate Affairs and Strategic Development, Matthew Deyoe . To

register for the call, please proceed through the following link Register here. For access to the webcast, please

Click here.

São Paulo, Brazil – (August 16, 2024) – Sigma Lithium Corporation NASDAQ: SGML, BVMF: S2GM34, TSXV:

SGML), a leading global lithium producer dedicated to powering the next generation of electric vehicles with

carbon neutral, socially and environmentally sustainable Quintuple Zero High Purity Lithium Concentrate (“5.0

Green Lithium”), today announced its results for the second quarter ended June 30, 2024. The Quarterly Filings

and accompanying Management Discussion and Analysis (“MD&A”) will be available on SEDAR+

(www.sedarplus.ca), EDGAR (www.sec.gov) and the Company’s corporate website.

Ana Cabral, Co-Chairperson and CEO said: “We are extremely pleased to present Sigma’s robust financial results.

This quarter, we achieved operational excellence on key fronts: Continuing to deliver the sales volume cadence

of a seasoned producer, maintaining premiumization of our 5.0 Green Lithium while further diversifying our

commercial relationships by selling to new geographies such as Japan and South Korea . We focus ed on

increasing our robust cash margins, maintaining our draconian cost discipline culture, leading Sigma to achieve

our 2024 cash cost guidance this quarter, ahead of schedule.

“Operationally, the Company has invested in improving the throughput and recovery at our Greentech plant, which

will bear fruit in the third quarter further increasing the efficiency of the operations. As a result, we are forecasting

our 3Q sales to reach 60,000t, which will bring the extra benefit of a further decrease of our unit costs” , Ana

concluded.

Operational Update

Sigma Lithium is pleased to celebrate its first full year of shipments at Grota do Cirilo, achieving the operational

excellence of a seasoned lithium producer: Reaching r egular cadence of 22,000t shipments , deliver ing the

second highest operational employee safety index globally ( achieving the high standards equivalent to the

second place at ICMM rankings (International Council of Metals and Mining), while maintaining high cash margins

of 54% (FOB Brazil), equal to larger peer companies.

During 2Q, Sigma Lithium sold 52,572t of its 5.0 Green Lithium. The Company made two full shipments during the

quarter, with an additional sale FOB Brazil Port totalling 17,270 tonnes at the end of 2Q ’24. The Company

continued a strategy initiated in the 1Q 24, when it delivered 8,700 tonnes ( ultimately shipped in April 24) in a

similar FOB Brazil Port sale agreement.

Looking forward, the Company has deployed significant operational improvements at the Greentech Plant, which

should drive yield and recoveries:

• Developed enhancements to the flowsheet to increase recoveries and operational efficiency, which

brings an additional production boost by allowing reprocessing of previously dry stacked lithium high

quality fines (at 1.5% Li2O).

• Results of these improvements already reflected in production levels of Jul. 24 and Aug. 24 driving 3Q 24

sales guidance.

Lithium concentrate production in the second quarter totaled 49,389t, compared to 54,168t in 1Q24. The change

is primarily related to the replacement of a c rusher module which occurred in June . Production has since

normalized and continued to increase in July and August. For the third quarter, the Company expects to produce

roughly 60,000 tonnes of 5.0 Green Lithium.

Commercial Update

Establishing a track record as a reliable supplier to the batter y supply chain has enabled the Company to

increase its commercial independence. This has led to a diversification of sales and commercial relationships by

engaging with new South Korean and Japanese industrial, trading and battery manufacturing companies.

During the second quarter, the Co mpany internalized additional logistics and commercial functions, leading to

further efficiency and cost savings of approximately $20/t per shipment. The improved commercial capabilities

allowed Sigma to capture stronger market opportunities as they arose during the quarter.

Pricing mechanisms were also quite varied in 2Q , as Sigma deployed fixed price, fixed floating ratios and

provisional price models in its negotiations. Going forward, the Company will continue to remain flexible with its

commercial strategy to maximize the value for its premium product.

Financial Update

Key Performance Metrics for Quarter Ended June 30, 2024 ($ USD)

Unit 2Q24 1Q24

Reported Revenue $ 000s 45,920 37,202

Concentrate Sold tonnes 52,572 52,857

Concentrate Grade Produced % 5.35% 5.40%

Average Reported Selling Price CIF (1) $/t 1,056 1,010

Average Realized Price CIF (2) $/t 894 785

Unit Operating Cost (3) $/t 364 397

Adjusted Cash EBITDA (4) $ 000s 13,288 5,878

Net Income $ 000s (10,848) (6,962)

Cash and Cash Equivalents $ 000s 75,330 108,191

Accounts Receivable $ 000s 65,652 29,027

Revenues in the second quarter totaled USD $46 million, implying a realized CIF equivalent sales price (2) of

$894/t. Provisional price adjustments continued to impact results although at much lower levels than in 4Q23

and 1Q24. The Company notes that the average CIF equivalent price for product shipped during 2Q (1) was

$1,056/t.

Sigma Lithium’s focus on dynamic pricing strategies, combined with a disciplined cost focus, led the Company

to achieve the second-highest FOB unit cash margins amongst lithium producers in the second quarter, at 54%.

Year to date, cash unit operating costs have declined by 22%, leading the Company to achieve its guided cost

structure ahead of schedule.

• Cash unit operating costs(3) for lithium concentrate produced at the Company’s Grota do Cirilo operations

in the second quarter averaged USD $364/t.

• On an FOB Vitoria basis (which includes transportation and port charges) costs averaged USD $424/t.

• On a CIF China equivalent basis (includes ocean freight, insurance and royalties) costs averaged $515/t.

Sigma Lithium expects to further decrease its unit costs as it continues to increase the efficiency and recoveries

of the Greentech Plant increasing production volumes and leveraging fixed-costs.

The Company delivered second quarter cash adjusted EBITDA (4) of $13.3 million (C$18.2 million), reflecting a

margin of 29%. Reported EBITDA for the second quarter totaled $8.6 million (C$11.9 million).

• The cash adjusted EBITDA number excludes $0.7 million (C$1.0 million) of non-recurring expenditures,

primarily related to legal initiatives, nearly $2 million (C$2.7 million) in non -cash, non-operating, accruals

adjustments, and $1.9 million (C$2.6 million) in non-cash stock-based compensation expenses.

Net income in the quarter totaled -$10.8 million (C$14.8 million), or -$0.10 per diluted share outstanding. Headline

net income was impacted by $14.6mn in non-operating currency related adjustments, the vast majority of which

were non-cash in nature.

Phase 2 Expansion

Recall, on April 1, 2024, the Board of Directors announced a Final Investment Decision (“FID”) for the Company’s

Phase 2 Greentech Plant expansion. The project is expected to add 250,000 tonnes of production capacity to

the current Phase 1 o peration. The Company has begun land clearing and fauna suppression to ready the site

for formal earthworks.

Total building and commissioning are expected to occur over a 12-month period. The total expected capex for

the Phase 2 construction is $100 million (C$136 million), and the Company has already secured all relevant

environmental licenses to build and operate its second Greentech Plant.

Land Suppression and Clearing for Phase 2 operations at Grota do Cirilo.

Balance Sheet & Liquidity

Sigma Lithium ended the second quarter with $ 75.3 million (C$103 million) in cash and cash equivalents. The

sequential decline is largely related to the timing of cash receivables and a reduction in our payables balance .

As of the time of filing, the Company’s cash balance had returned to $ 99 million. At the end of the quarter , the

Company had $219 million (C$300 million) in short-term loans and export prepayment liabilities. This included

$99 million in drawn and available, but unutilized, liquidity through trade finance lines.

Capital expenditures during the second quarter totaled $ 8.6 million (C$11.9 million) directed to wards

maintenance, mining, Phase 2 expansion work, and incremental investments in the Greentech Plant .

Free cash flow was a drag as a result of the timing of our receivables (~$ 45 million), which we received after

quarter end, and a decrease in payables balance.

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.

Sigma Lithium is one of the world’s largest lithium producers . The Company operates at the forefront of

environmental and social sustainability in the EV battery materials supply chain at its Grota do Cirilo Operation

in Brazil. Here, Sigma produces Quintuple Zero Green Lithium at its state-of-the-art Greentech lithium

beneficiation plant that delivers net zero carbon lithium, produced with zero dirty power, zero potable water,

zero toxic chemicals and zero tailings’ dams.

Phase 1 of the Company’s operations entered commercial production in the second quarter of 2023 . The

Company has issued a Final Investment Decision, formally approving construction to double capacity to 520,000

tonnes of concentrate through the addition of a Phase 2 expansion of its Greentech Plant.

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, Amended and Restated Technical Report” issued March 19,

2024, which was prepared for Sigma L ithium by Homero Delboni Jr., MAusIMM, Promon Engenharia; Marc -

Antoine Laporte, P.Geo, SGS Canada Inc; Jarrett Quinn, P.Eng., Primero Group Americas; Porfirio Cabaleiro

Rodriguez, (MEng), FAIG, GE21 Consultoria Mineral; and William van Breugel, P.Eng (the “Updated Technical

Report”). The Updated Technical Report is filed on SEDAR and is also available on the Company’s website .

For more information about Sigma Lithium, visit https://www.sigmalithiumresources.com/

FOR ADDITIONAL INFORMATION PLEASE CONTACT

Matthew DeYoe, EVP, Corporate Affairs and Strategic Development

+1 (201) 819-0303

[email protected]

Daniel Abdo, Director, Investor Relations

+55 11 2985-0089

[email protected]

Sigma Lithium

Sigma Lithium

@sigmalithium

@SigmaLithium

FORWARD-LOOKING STATEMENTS

This news release includes certain “forward -looking information” under applicable Canadian and U.S. securities legislation,

including but not limited to statements relating to timing and costs related to the general business and operational outlook of

the Company, the environmental footprint of tailings and positive ecosystem impact relating thereto, donation and upcycling

of tailings, timing and quantities relating to tailings and Green L ithium, achievements and projections relating to the Zero

Tailings strategy, achievement of ramp -up volumes, production estimates and 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 -looking

information, 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 political conditions; the stable and supportive legislative, regulatory and community environment

in Brazil; demand for lithium, including that such demand is supported by growth in the electric vehicle market; the Company’s

market position and future financial and operating performance; the Company’s estimates of mineral resources and mineral

reserves, includi ng whether mineral resources will ever be developed into mineral reserves; and the Company’s ability to

operate its mineral projects including that the Company will not experience any materials or equipment shortages, any labour

or service provider outages or delays or any technical issues. Although management believes that the assumptions and

expectations reflected in the forward-looking information are reasonable, there can be no assurance that these assumptions

and expectations w ill 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 vehicles and other large format batteries currently has limited market share and no assurances can be given for the

rate at which this market will develop, if at all, which could affect the success of the Company and its ability to develop lithium

operations. There can be no assurance that such statements will prove to be accurate, as actual results and future events

could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on

forward-looking information. The Company disclaims any intention or obligation to update or revise any forward -looking

information, whether because of new information, future events or otherwise, except as required by law. For more information

on the risks, uncertainties and assumptions t hat could cause our actual results to differ from current expectations, please

refer to the current annual information form of the Company and other public filings available under the Company’s profile

at www.sedarplus.com.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX

Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release.

Financial Tables

The Company’s independent auditor has not performed a review of the unaudited interim consolidated financial statements

for the three -month period ended March 31, 2024 or these unaudited interim consolidated financial statements for the six -

month period ended June 30, 2024 in accordance with standa rds established by the Canadian Institute of Chartered

Accountants for a review of interim financial statements by the entity’s auditor.

Figure 1: Unaudited Income Statement Summary

Three Months Ended June

30, 2024

Three Months Ended

June 30, 2024

($000) CAD USD

Revenue 62,857 45,920

Operating costs (40,712) (29,766)

Gross profit 22,145 16,155

Sales expense

(515)

(376)

G&A expense

(6,297) (4,603)

Stock-based compensation (2,656) (1,943)

ESG and other operating expenses (4,966)

(3,627)

EBIT 7,711 5,606

Financial income and (expenses), net (5,453)

(3,987)

Non-cash FX & other income (expenses), net (20,045)

(14,646)

Income (loss) before taxes (17,787) (13,026)

Income taxes and social contribution 2,966 2,178

Net Income (loss) for the period (14,821) (10,848)

Weighted avg diluted shares outstanding 110,528 110,528

Earnings per share ($0.13) ($0.10)

Figure 2: Unaudited Balance Sheet Summary

Three Months Ended

June 30, 2024

Three Months Ended

June 30, 2024

($000) CAD USD

Assets

Cash and cash equivalents 103,090 75,330

Trade accounts receivable 89,846 65,652

Other current assets 39,821 29,098

Total current assets 232,757 170,080

Property, plant and equipment 223,269 163,147

Other non-current assets 110,611 80,825

Total Assets 566,637 414,053

Liabilities & Shareholder Equity

Financing and export prepayment 148,858 108,774

Accounts payable 51,761 37,822

Other current liabilities 21,888 16,002

Total current liabilities 222,507 162,598

Financing and export prepayment 151,544 110,736

Other non-current liabilities 14,858 10,857

Total non-current liabilities 166,401 121,593

Total shareholders' equity 177,729 129,863

Total Liabilities & Shareholders' Equity 566,637 414,053

Figure 3: Unaudited Cash Flow Statement Summary

Six Months Ended June

30, 2024

Six Months Ended June

30, 2024

($000) CAD USD

Operating Activities

Net income (loss) for the period (24,055) (17,757)

Adjustments, including FX movements 49,165 36,292

Interest payment on loans and leases (3,739) (2,631)

Adjustments to income (loss) for the period 21,371 15,904

Change in working capital (77,296) (56,466)

Net Cash from Operating Activities (55,926) (40,562)

Investing Activities

Purchase of PPE (17,244) (12,597)

Addition to exploration and evaluation assets (3,262) (2,383)

Other (478) (349)

Net Cash from Investing Activities (20,984) (15,329)

Financing Activities

Proceeds of loans, net 126,900 92,702

Other (1,043) (762)

Net Cash from Financing Activities 125,857 91,940

Effect of FX (10,260) (9,304)

Net (decrease) increase in cash 38,687 26,745

Cash & Equivalents, Beg of Period 64,403 48,584

Cash & Equivalents, End of Period 103,090 75,330

Endnotes & Reconciliations:

To provide investors and others with additional information regarding the financial results of Sigma Lithium, we have disclosed

in this release certain non -IFRS operating performance measures such as realized price per tonne, unit operating costs,

EBITDA, EBITDA margin, Adjusted cash EBITDA, and Adjusted cash EBITDA margin. These non-IFRS financial measures are

a supplement to and not a substitute for or superior to, the Company's results presented in accordance with IFRS. The non-

IFRS financial measures presented by the Company may be different from non -GAAP/IFRS financial measures presented by

other companies. Specifically, the Company believes the non -IFRS information provides useful measures to investors

regarding the Company's financial performance by excluding certain costs and expenses that the Company believes are not

indicative of its core operating results. The presentation of these non-U.S. GAAP/IFRS financial measures is not meant to be

considered in isolation or as a substitute for results or gu idance prepared and presented in accordance with U.S.

GAAP/IFRS. A reconciliation of these financial measures to IFRS results is included herein.

1: Average reported selling price is a CIF equivalent metric with the associated adjustments made to FOB accounted shipments to

gross up for the relevant ocean freight and insurance costs. The associated revenue figure represents revenues associated with

shipments made during the reporting period. The final adjusted price may be higher or lower than the estimated realized price based

on future price movements.

$000 1Q24 2Q24

Revenues from Shipments Made 49,141 54,418

Tonnage Sold 52,857 52,572

Realized Price /t 930 1,035

Ocean Freight & Insurance 4,290 1,088

CIF Equivalent Revenues 53,431 55,506

Tonnage Sold 52,857 52,572

CIF Equivalent Realized Price /t 1,010 1,056

2: Average realized price is a reflection of net revenues for the quarter and tonnes shipped. Reported revenues are accounted for on

an “as accounted” basis, and thus reflect FOB and FOB & CIF shipments as was the case for 1Q and 2Q, respectively. These figures

have been grossed up for the associated CIF shipping costs to create a more peer comparable figure. The final adjusted price may

be higher or lower than the estimated realized price based on future price movements.

$000 1Q24 2Q24

Reported Revenues 37,202 45,920

Tonnage Sold 52,857 52,572

Realized Price /t 704 873

Ocean Freight & Insurance 4,290 1,088

CIF Equivalent Revenues 41,492 47,008

Tonnage Sold 52,857 52,572

CIF Equivalent Realized Price /t 785 894

3: Cash unit operating costs include mining, processing, and site based general and administration costs. It is calculated on an incurred

basis, credits for any capitalised mine waste development costs, and it excludes depreciation, depletion and amortization of mine and

processing associated activities. When reported on an FOB basis, this metric includes road freight, and port related charges. When

reported on a CIF it includes ocean freight, insurance and royalty costs. For CIF costs, management is making assumptions to right-

size its cost of goods sold balances for the effective ocean freight and insurance payments which were netted against revenues for

shipments that were accounted for on an FOB basis. Royalty costs include a 2% government royalty and a 1% private royalty.

Adjusted Cash EBITDA Bridge

Three Months Ended June

30, 2024

Three Months Ended June

30, 2024

($ 000) CAD USD

Revenues 62,857 45,920

Cost of goods sold (40,712) (29,766)

Gross Profit 22,145 16,155

Sales expenses (515) (376)

G&A expense (6,297) (4,603)

Stock-based compensation (2,656) (1,943)

ESG & other operating expenses, net (4,966) (3,627)

EBIT 7,711 5,606

Depreciation & Amortization 4,149 3,033

EBITDA 11,860 8,639

EBITDA (%) 19% 19%

Non-recurring expenses (1) 1,008 737

Stock-based compensation 2,656 1,943

Other non-cash expenses (2) 2,696 1,969

Adjusted Cash EBITDA 18,220 13,288

Adjusted EBITDA (%) 29% 29%

(1) This number includes US $650,000 in legal related expenses

(2) Primarily related to non-cash reversal of accrual liabilities