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Sigma Lithium Announces the Construction Mobilization ON Site, Presentation at COP26 and Filing of Preliminary Base Shelf Prospectus

Financings Mine Development & Operations

SIGMA LITHIUM ANNOUNCES THE CONSTRUCTION

MOBILIZATION ON SITE, PRESENTATION AT COP26 AND

FILING OF PRELIMINARY BASE SHELF PROSPECTUS

HIGHLIGHTS

- Announcing mobilization at Project site of the workforce and equipment for the

construction of the Production Plant

- Sigma concludes FEED and presents new 3D detailed design of its Production plant

- Sigma Co-CEO Ana Cabral-Gardner to participate at COP26 in Glasgow as a representative

party to the United Nations Convention on Climate Change

- Sigma will speak on the theme “Circular Economy and the 21st Century City: Unlocking the

Social & Environmental Benefits of the Sustainable City”

- Sigma will present at COP26 a video with the summary of its ESG strategy

- The Company announces that it filed, both in U.S. and Canada, a preliminary short form

base shelf registration statement to qualify the distribution, over a 25-month period of up to

US$250 million of the Company’s debt and equity securities

Sigma is reissuing its news release of Friday November 5, 2021 to clarify that the mobilization

initiatives detailed are for purpose of initiating construction (not pre -construction). The

Project´s advancement to this new stage is consistent with our previous disclosures to date.

VANCOUVER, British Columbia, November 9, 202 1- Sigma Lithium (“Sigma” or the

“Company”) (NASDAQ:SGML, TSXV:SGML), dedicated to powering the next generation of

electric vehicle batteries with environmentally sustainable and high-purity lithium, is pleased

to announce that it is mobilizing its workforce and equipment on site for the construction of

the Production Plant (as defined below) of its Grota do Cirilo lithium Project (the “Project”).

This stage of the construction comprises the execution of the earthworks to build the foundation

and infrastructure of the Production Plant, involving moving over one million cubic meters of

terrain and employing approximately 180 contractors. Completion of this stage of construction

is expected within three months.

Following the successful completion of FEED (front-end engineering and design), the Company

is releasing a new video with a comprehensive 3D rendering of its Production Plant and

adjacent facilities . The video can be accessed on the Company’s web site at

www.sigmalithium.ca.

COP26 PARTICIPATION

The Company also announces that Sigma Co-CEO Ana Cabral-Gardner arrived in Glasgow to

participate at COP26. She has been n ominated by a national focal point (NFP) as a

representative party to the United Nations Convention on Climate Change. Sigma will speak

on the theme “ Circular Economy and the 21st Century City: Unlocking the Social &

Environmental Benefits of the Sustainable City” and detail Sigma Lithium’s environmentally

friendly lithium project. Without using any hazardous chemicals, the company is working to

achieve zero net carbon emissions by 2024. Other highlights include recirculating 100% of the

water and dry stacking 100% of the tailings. The company is also introducing biodiesel into the

mining fleet to further reduce its carbon footprint. In her capacity as Co-Chair of Sigma, she

will also speak at the COP26 main event/blue zone regarding “The Future of ESG Investing:

Enabling the Energy Transition to a Net Zero World.”

Sigma is bringing to COP26 in Glasgow a delegation from Vale do Jequitinhonha to participate

in person as guests in the investment track of COP26, hosted by the World Climate Fund from

Denmark. The mission of the delegation is to create a plan for the cities of Araçuaí and Itinga

to achieve:

(i) environmentally sustainable development and

(ii) net zero by 2040

The plan will be presented to and is expected to be funded by global foundations and venture

capital, introduced by Sigma.

EPCM AND CONSTRUCTION

The Company is negotiating an EPCM agreement for the engineering, procurement,

construction of the Production Plant and associated infrastructure with Promon Engenharia

Ltda. (“Promon”) and Primero Group Ltd (“Primero”). Following successful conclusion of FEED,

both remain engaged by Sigma and have been focusing on negotiating and securing the long

lead items for the construction of the Production Plant. The Company is also in negotiations

with the two finalist mining contractors of the selection process, which will build and operate

the Company’s first mine at the Project.

The detailed design of the Production Plant is based on clean technologies including state of

the art environmental circuits for water recirculation, dry stacking of tailings as well as six dense

media separators (”DMS”), which do not utilize harmful chemicals in the production of high

purity lithium materials. The DMS will be automated and digitally controlled electronically by

an algorithm, developed to contemplate the specificities of the mineralogy in each of the

company’s mines.

FILING OF PRELIMINARY BASE SHELF PROSPECTUS IN U.S AND CANADA

The Company has filed a preliminary short form base shelf prospectus (the “Canadian Base

Shelf”) to qualify the distribution, from time to time over a 25-month period of up to US$250

million of the Company’s debt and equity securities. The Canadian Base Shelf was filed in each

province and territory of Canada, other than the Province of Quebec. The Company also filed

a corresponding shelf registration statement on Form F-10 (the “U.S. Base Shelf”) with the U.S.

Securities and Exchange Commission (the “ SEC”) under the Multijurisdictional Disclosure

System. The Canadian Base Shelf remains subject to completion or amendment. The U.S. Base

Shelf has been filed with the SEC but has not yet become effective. A copy of the U.S. Base

Shelf may be obtained on EDGAR at www.sec.gov and a copy of the Canadian Base Shelf may

be obtained on SEDAR at www.sedar.com.

Securities may not be sold nor may offers to buy be accepted until a receipt for the final

Canadian Base Shelf has been issued by the Canadian securities regulators and the U.S. Base

Shelf has become effective. This press release does not constitute an offer to sell or the

solicitation of an offer to buy any securities. Further, there shall be no sale of these securities

in any province, state or jurisdiction in which such offer, solicitation or sale would be unlawful

prior to the registration or qualification under the securities laws of any such province, state or

jurisdiction.

ABOUT SIGMA LITHIUM:

The Company is developing, with an environmental sustainability focused and ESG-centric strategy, the

largest hard rock lithium deposits in the Americas, located in its wholly owned Grota do Cirilo Project

in Brazil with the goal of participating in the rapidly expanding global supply chain of electric vehicles.

The Company plans to produce 220,000/t annually of environmentally sustainable battery grade lithium

concentrate (33,000 t of lithium carbonate equivalent in Phase 1 production), note based on the 2021

updated Feasibility Study Report. In Phase 2 production, if warranted after ongoing feasibility study,

production would be increased to 440,000 t (66,000 tonnes of LCE) annually. The first and second phase

of production for the Project will utilize as feedstock spodumene from the Project’s own mines.

Since 2018, the Company has been producing low carbon high purity lithium concentrate at an on-site

demonstration pilot plant with the objective to ship samples to potenti al customers for product

certification and testing. This pilot production has been an important part of the successful commercial

strategy of the Company allowing it to ship samples of its low carbon “green & sustainable” high purity

lithium to leading global potential customers, for product certification and testing.

The Company is in pre -construction and detailed engineering of an environmentally friendly, fully

automated, dense media separator production plant that applies proprietary algorithms to digitally

control the dense media (the “Production Plant”). The Production Plant will be vertically integrated into

the Company ́s mining operations, exclusively utilizing as feedstock the high purity spodumene ore with

exceptional mineralogy from the Project. The Production Plant will process the spodumene ore into a

high purity 6% battery-grade lithium concentrate engineered to the specifications of its customers in the

lithium- ion battery supply chain for EVs.

In order to secure a leading position supplying the clean mobility and green energy storage value chains,

the Company has adhered consistently to the highest standards of environmental, social and governance

practices, which were established as part of its core purpose at inception in 2012. Its production process

will be powered by clean energy and the Company will use state -of-the art water recirculation circuits

in its processing combined with dry stacking tailings management. The DMS process of the Production

Plant does not utilize hazardous chemicals, as a result its tailings are 100% recyclable into ancillary

industries, such as ceramics.

The Company plans to achieve net zero carbon emission targets by 2023, partly as a result of its strategic

decision to pursue ge neration of carbon credits through “in -setting” carbon credits (preserving and

developing the agroforestry systems within its regional ecosystem). The Company is currently undergoing

an independent assessment of its net carbon footprint, conducting an independent ISO 14000 compliant

audit of its life cycle analysis together with an independent expert validation of its carbon credits

generated by its internal preservation, reforestation, and compensation forestry programs. The Company

expects to complete this workstream in the second half of 2021.

Sigma has significant potential for additional future expansion and growth, as it owns 27 mineral rights

spread over 191 km 2 (which include mining concessions, applications for mining concessions,

exploration authorizations and applications for mineral exploration authorizations). The Grota do Cirilo

Project area includes nine past producing lithium mines.

QUALIFIED PERSONS

The technical and scientific information related to geology and mineral resource estimate in this news

release has been reviewed and approved by Marc -Antoine Laporte P.Geo., M.S.c., of SGS Geological

Services. Mr. Laporte is a Qualified Person as defined by National Instrument 43-101 and is independent

of Sigma.

FOR ADDITIONAL INFORMATION PLEASE CONTACT

SIGMA LITHIUM INVESTORS:

Daniel Abdo

(Sao Paulo) +55 11 2985-0089

[email protected] or [email protected]

Vitor Ornelas

(Sao Paulo) +55 11 2985-0089

[email protected]

SIGMA LITHIUM MEDIA CONTACTS:

Anthony Dovkants

(Brazil) +55 11 99686 806

[email protected]

Colleen Robar

(United States) +1 313 207 5960

[email protected]

SIGMA LITHIUM SOCIAL MEDIA:

LinkedIn: @SigmaLithium

Instagram: @sigmalithium

Twitter: @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 the ability of the Company to complete offerings of its

securities under its shelf offering documents, the ultimate duration, impact and severity of the COVID-19 pandemic

(including its impact on financial markets and national and multinational economies g enerally, and its impact on

the growth of the electric vehicle market and other impacts on the demand for lithium products), the general business

and operational outlook of the Company, and other forward-looking information. All statements that address future

plans, activities, events, 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 the juri sdictions where the Company operates; anticipated

trends and effects in respect of the COVID -19 pandemic and post -pandemic; 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 developed into mineral reserves; and the Company’s ability to develop and

achieve production at its mineral projects. 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 inherently involves and is subject to risks and

uncertainties, including but not limited to that the Company may not develop its mineral projects into a commercial

mining operation; 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 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.