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SGML.V ·

Sigma Lithium Upsizes Previously Announced Private Placement BY 42% to C$85 Million

Financings

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SIGMA LITHIUM UPSIZES PREVIOUSLY ANNOUNCED PRIVATE

PLACEMENT BY 42% TO C$85 MILLION

VANCOUVER, British Columbia, December 13, 2021 -- Sigma Lithium Corporation

(NASDAQ: SGML, TSXV: SGML) (“Sigma” or the “Company”) is pleased to announce that,

owing to strong global investor interest, it has increased the size of its previously announced

non-brokered private placement of common shares (the “Offering”) by approximately 42%

to C$ 85 million.

The Company now intends to issue approximately 7,234,042 common shares of the

Company (“Common Shares”) (compared with approximately 5,106,38 3 Common Shares

previously announced) to be issued at a price of C$ 11.75 per Common Share (for expected

aggregate gross proceeds of approximately C$ 85,000,000 (compared with

C$60,000,000 previously announced). Leading global investors focused on ESG &

sustainability, are expected to comprise the majority of the investors in the Offering.

The Company expects to use the net proceeds of the Offering for the construction and

development of its wholly owned Grota do Cirilo Project and for general corporate

purposes, at the sole discretion of the Company.

The Offering is scheduled to close on or about December 16, 2021, and is subject to certain

conditions including, but not limited to, the receipt of all necessary approvals, including the

approval of the TSX Venture Exchange.

The Company has entered into an agreement with the A10 Group to provide services in

respect of the Offering, and A10 Group will be entitled to finder’s compensation for

purchases by subscribers it introduces. Certain principals of the A1 0 Group are directors,

officers or indirect significant shareholders of the Company. The Common Shares will be

offered outside the United States pursuant to Regulation S under the U.S. Securities Act of

1933, as amended (the “1933 Act”).

This press release shall not constitute an offer to sell or the solicitation of an offer to buy

nor shall there be any sale of the Common Shares in the United States. The securities being

offered have not been, nor will they be, registered under the 1933 Act and may not be

offered or sold in the United States absent registration or an applicable exemption from the

registration requirements of the 1933 Act and applicable of state securities laws. The

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Common Shares are being issued by the Company in jurisdictions outside of Ca nada and

the United States in accordance with the securities laws of those jurisdictions.

This news release does not constitute an offer to sell or the solicitation of an offer to buy,

nor shall there be any sale of Common Shares under the Offering, in any jurisdiction in which

such offer, solicitation or sale would be unlawful.

About Sigma Lithium Corporation

Headquartered in Canada, Sigma Lithium (NASDAQ: SGML, TSXV: SGML) is dedicated to

powering the next generation of electric vehicle batteries with environmentally sustainable

and high -purity lithium, developing with an ESG -centric strategy, a leading integr ated

Lithium company in the Americas. Sigma is developing the largest hard rock lithium

spodumene deposits in the Americas, located in its wholly owned Grota do Cirilo Project in

Brazil.

The Company has processed these spodumene into Battery Grade Green and Sustainable

Lithium for three years having achieved certification status with the largest battery makers

in the world. Sigma has unique and differentiated environmental and social sustainability

practices: The Project will be powered by clean & renewable energy. The Processing Plant

will use state -of-the art water recirculation circuits combined with dry stacking tailings

management, to reuse 100% of the water and not to create tailing dams. Sigma has

sponsored a private agency to promote additional inve stments in the region and has been

fostering initiatives to both create sustainable economic development while lifting the

community from poverty.

With a goal of net zero carbon emissions by 2024, the Company has adhered consistently

to the highest standards of environmental, social and governance practices, established as

part of its core purpose at inception in 2012. For more information about Sigma Lithium, visit

www.sigmalithiumca.com.

FOR ADDITIONAL INFORMATION PLEASE CONTACT

SIGMA LITHIUM INVESTORS:

Marina Bernardini

+55 11 98263-1818

[email protected]

or [email protected]

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SIGMA LITHIUM MEDIA CONTACTS:

Colleen Robar

+1 313 207 5960

[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. This news release includes certain "forward -looking information" under applicable

Canadian and U.S. securities legislation, including but not lim ited to statements relating to

the Company completing the Offering, the use of proceeds of the Offering, the receipt of

TSXV approval, the operation of the Processing Plant, the ability of the Company to complete

construction and commence commercial production within the targeted timing and projected

budget, achieving net zero carbon, 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 jurisdictions 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 managemen t

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

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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 Exchan ge 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.