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Sigma Lithium Announces Loading 22,000t Shipment with 85% Prepayment at Premium Prices

Corporate Updates

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SIGMA LITHIUM ANNOUNCES LOADING 22,000t SHIPMENT

WITH 85% PREPAYMENT AT PREMIUM PRICES

HIGHLIGHTS

• Sigma Lithium announces that it has commenced loading its 8th shipment, totaling 22,000 tonnes

of its Quintuple Zero Green, high purity and coarse lithium concentrate, at the Port of Vitoria.

• The Company achieved a premium fixed price of US$ 1,333/t (13% VAT included), equivalent to

US$ 1,160/t (net of VAT) through a negotiated, fixed, “auction-price discovery” process.

• Sigma Lithium will continue to adapt its commercial strategy to maximize price discovery and

value creation for its April 2024 production, to be shipped in early May.

São Paulo , Brazil – (April 15, 2024) – Sigma Lithium Corporation (“Sigma Lithium ” or the “Company”)

(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 lithium

concentrate, announces it has commenced the on -time loading of its eighth shipment of quintuple zero green

high-purity coarse lithium concentrate (“Quintuple Zero High-Purity Lithium”) , totaling 22,000 tonnes, at the Port

of Vitoria.

The achieved price is final and non -provisional and represents a meaningful increase over the previous premium

prices achieved. As a reference, the final price net of VAT is equivalent to 8.75% of the LME Lithium Hydroxide

CIF market price, as previously disclosed in a news release on March 27, 2024. 85% of the eighth shipment’s value

has also been prepaid.

Keith Prentice, Co -General Manager commented: “The site team has been executing at a high level, with the

Greentech Plant delivering at the predictable cadence of an established producer.”

Catarina Noci, Commercial Director commented: “ We believe the market is now just starting to attribute value to

Sigma’s superior product qualities. We can build on the traction gained in April, with early indications pointing to

better economics for our upcoming May shipment.”

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 operates at the forefront of environmental and social sustainability in the EV battery materials

supply chain and is currently producing Quintuple Zero Green Lithium concentrate from its Grota do Cirilo

Project in Brazil. Phase 1 of the project entered commercial production in 2Q23 and has an annual capacity of

270,000 tonnes of concentrate (36,700 LCE annually). The Company has issued a Final Investment Decision

formally approving plans to nearly double capacity to 520,0 00 tonnes of concentrate through the addition of a

Phase 2 concentrate mine and associated mine. The project produces lithium concentrate at its state-of-the-art

Greentech lithium plant that uses 100% renewable energy, 100% recycled water and 100% dry-stacked tailings.

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 -

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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 & 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 Lithium, achievements and projections relating to the Zero Tai lings

strategy, achievement of ramp-up volumes, production estimates and the operational status of the Groto 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 de veloped 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 will prove to be correct.

Forward-looking information inhere ntly 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 batte ries

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 ac tual 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 that 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.sedar.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.