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Sigma Lithium Provides Update ON Final Stage of Strategic Review: Initiates Primary Listing of Sigma Brazil ON NASDAQ and Singapore

Mergers & Acquisitions Listings & Exchange

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SIGMA LITHIUM PROVIDES UPDATE ON FINAL STAGE OF

STRATEGIC REVIEW: INITIATES PRIMARY LISTING OF SIGMA

BRAZIL ON NASDAQ AND SINGAPORE

HIGHLIGHTS

• In connection with its Strategic Review Process, Sigma Lithium has entered contractual and

detailed structural negotiations with finalists, which shall continue into the new year.

• To achieve optimal structural flexibility and maintain competitiveness of the Process until its

conclusion, Sigma Brazil is initiating the procedures for a primary listing of its shares on both

Nasdaq and Singapore Stock Exchange.

o Such listings can help maximize shareholder value, should the selected alternative in its

strategic review process involve only Sigma Brazil.

o The Board does not expect the listing processes to interfere with the conclusion of its

strategic review.

o Sigma Lithium’s high ESG standards, specifically Governance, as well as minority

shareholder led composition of Board of Directors, should be mirrored at Sigma Brazil.

SAO PAULO, BRAZIL – (December 18, 2023) – Sigma Lithium Corporation (“Sigma Lithium” or the

“Company”) (NASDAQ: SGML, TSXV: SGML, BVMF: S2GM34), a leading lithium producer dedicated to

powering the next generation of electric vehicles with carbon neutral, Triple Zero Green lithium concentrate is

continuing its Strategic Review Process (“Process”) into the new year.

The Board of Directors (“Board”) remains encouraged by the direction of negotiations between Sigma Lithium

and the finalists in the Process. These parties are committed to the Process and are actively engaged in

drafting contractual documentation.

As part of this Process, the Company is announcing its intention to initiate the procedures to list the shares of

Sigma Brazil at both Nasdaq and Singapore Stock Exchange.

• The dual listing of Sigma Brazil is solely contemplated for the purpose of closing the strategic

transaction, maximizing shareholder value.

• All shareholders, whether holding shares of Sigma Lithium or Sigma Brazil, would ultimately be taken

out in the event of an acquisition.

• Sigma Brazil selected a Nasdaq listing level equal to Sigma Lithium’s existing listing, to continue to

adhere to one of the highest levels of global corporate governance and transparency in the world.

• Sigma Lithium minority shareholder led composition of Board of Directors, should be mirrored at

Sigma Brazil.

• The Board remains committed to maximizing value for all stakeholders, especially the communities at

Vale do Jequitinhonha.

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Ana Cabral, CEO commented: “We are delighted with the overwhelming interest in our business from some of

the most admired companies in the battery materials and electric vehicles industries globally, including

automakers and battery manufacturers. We are also honored with the direct engagement of C-level executives

and board members from the consortiums with our leadership during this strategic process, significantly

strengthening our relationships with global leaders and key decision makers of our industry.”

Lucas Melo, Chair of the Audit Committee complemented: “Brazil is building thriving and globalized lithium

mining and materials industries: welcoming strategic partners from all over the world. The country’s lithium

industry has already received investments from companies headquartered in China, the United States, Canada,

Australia and the United Kingdom. The Singaporean listing of Sigma Brazil aims to maximize value for all

shareholders of Sigma Lithium by leveling the playing field across negotiating parties.”

Cesar Chicayban, Lead Independent Board Member added: “As the Company is a completely ramped up

producer, we can evaluate strategic alternatives from a position of maximum flexibility despite the current

lithium cycle downturn. Sigma is one of the largest and lowest cost producers in the industry and reached Net

Zero, achieving a key competitive advantage for the European Battery Passport. Therefore, Sigma Lithium in

parallel to its strategic review, has been laser focused on consolidating its position as one of the majors by

concluding the detailed engineering for its production capacity expansion plans.”

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

supply chain for six years and it is currently producing Triple Zero Green Lithium from its Grota do Cirilo Project

in Brazil. Phase 1 of the pro ject is expected to produce 270,000 tonnes of Triple Zero Green Lithium annually

(36,700 LCE annually). If it is determined to proceed after completion of an ongoing feasibility study, Phase 2 &

3 of the project are expected to increase production to 766,000 tonnes annually (or 104,200 LCE annually). The

project produces Triple Zero Green Lithium in 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 June 12, 2023,

which was prepared for Sigma Li thium 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 Noel O'Brien, B.E., MBA, F AusIMM (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

Jamie Flegg, Director, Business Development

+1 (647) 706-1087

[email protected]

Daniel Abdo, Director, Investor Relations

+55 11 2985-0089

[email protected]

Sigma Lithium

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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 Grot a 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.