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Sigma Lithium Announces Its Strategic Review Process Advanced to a Final Round Strategic Review Update

Mergers & Acquisitions

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SIGMA LITHIUM ANNOUNCES ITS STRATEGIC REVIEW

PROCESS ADVANCED TO A FINAL ROUND

STRATEGIC REVIEW UPDATE

• Sigma Lithium announces that its strategic review process advanced to a final round, with

consortiums formed amongst certain strategic parties.

• The Company remains committed to concluding its strategic review process no later than

year-end.

• Remaining strategic parties have “agreed-in-principle” to preserve Sigma Lithium’s

environmental and social sustainability centered business model, one of the keys to its

successful execution.

SAO PAULO, BRAZIL – (November 1, 2023) – 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, responsibly

sourced chemical grade lithium concentrate, announces that its strategic review process is advancing

to a final round, with consortiums formed amongst certain strategic parties, reinforcing Brazil’s position

as one of the world’s most global investor-friendly mining jurisdictions

The significant global strategic interest in the process is a result of the Company’s large mineral

resource scale, coupled with its low-cost open pit mineral reserves and leading position on

environmental and social sustainability. It also demonstrates the strength of the Company’s

governance, transparency and compliance, resulting from its international listings. These unique traits

underscore Sigma’s potential as an “enabler” for the business plans of companies in both the electric

vehicles and battery materials industries.

Sigma Lithium and its board remain committed to its initial timeline with a goal of completing the

strategic review process no later than year-end.

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 project 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 766,0 00

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 Lithium by Homero Delboni Jr., MAusIMM, Promon

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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

Mathew Deyoe, Executive Vice President

+1 (201) 819-0303

[email protected]

Jamie Flegg, Director, Business Development

+1 (647) 706-1087

[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 Tailings 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, including 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 inherent ly 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 accurat e, 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 re vise 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 exp ectations, 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.

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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.