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Sigma Lithium is Awarded BY Bndes a Letter of Intention FOR Development Bank Debt to Fund Construction of Its Environmentally Fully Licensed Second Greentech Industrial Lithium Plant

Mine Development & Operations

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SIGMA LITHIUM IS AWARDED BY BNDES A LETTER OF

INTENTION FOR DEVELOPMENT BANK DEBT TO FUND

CONSTRUCTION OF ITS ENVIRONMENTALLY FULLY LICENSED

SECOND GREENTECH INDUSTRIAL LITHIUM PLANT

HIGHLIGHTS

• Sigma Lithium completed the certification process with BNDES, which included the filing of the

final FEL3 Capex for Construction and Engineering of the Second Greentech Plant totaling R$

492,4 million or approximately US$ 100 million

• The Letter of Intention by BNDES outlines its intention to extend the Company development bank

debt financing ("Development Bank Debt") to fund the Second Greentech industrial lithium

concentrate production plant ("Second Greentech Plant") at Vale do Jequi tinhonha in Brazil.

• Sigma is also pleased to announce it was awarded a concomitant LP, LI, LO environmental license

to install and operate ("Full Environmental License") the Second Greentech Plant by the State of

Minas Gerais on January 31, 2024.

o The Company's impeccable sustainability track record led it to receive, once more, a

unanimous vote by all members of the independent environmental board (COPAM), which

votes and awards environmental licenses in Minas Gerais, including the vote of the boar d

members representing the NGOs.

o The Full Environmental License allows the Company to further expand its industrial

beneficiation and processing capacity of lithium minerals to up to a total of 3.7 million

tonnes per year.

• With the Second Greentech Plant, Sigma expects to significantly increase its production capacity

of its Quintuple Zero Green Lithium from the current 270,000 tonnes (on an annualized basis) by

approximately 240,000 tonnes (at a design estimated capacity at 6% Li2O) to approximately

510,000 tonnes.

o The Second Greentech Plant will introduce additional innovations that will further

increase the efficiency of its industrial process to beneficiate spodumene ore into

Quintuple Zero Green Lithium.

o Sigma's learning curve while commissioning the First Greentech Plant, rapidly achieving

nameplate capacity has been essential to its ability to innovate and further enhance a

process that beneficiates spodumene ore into pre-chemical lithium concentrate.

• Sigma anticipates initiating construction in the first quarter of 2024 at the end of the wet raining

season, following a Final Investment Decision to be made by its Board of Directors .

São Paulo , Brazil – (February 09, 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, is pleased to announce that it received a Letter of Intention for a project finance credit line

(“Development Bank Credit Line”) from the Development Bank of the Brazil (the “BNDES”). The Development Bank

Credit Line will be used for the expansion of the Company’s world class unique Quintuple Zero Green Lithium

Grota do Cirilo project in Vale do Jequitinhonha in Brazil (the “Project”).

The Letter of Intent is non-binding, as the consummation of the Development Bank Credit Line remains subject to

completion of: (i) observation of operating policies of BNDES in place during the review of Sigma Lithium’s project

finance application; (ii) review of the financing structure proposed by the Company; (iii) the Company submission

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of satisfactory collateral to BNDES. The closing of the Development Bank Credit Line is subject to the final credit

approval by BNDES Credit Committee , negotiation of definitive documentation and other customary closing

conditions, followed by final credit approval for each draw -drown. The financial cost of this type of credit line is

typically based on the Brazilian reference rate (“taxa referencial” or “TR”).

However, the closing conditions do not include lithium market -related conditions and pricing elements that fall

outside of the control of the Company.

The development bank credit line is part of a broader strategic plan by BNDES to foster in Brazil the development

of a world class competitive industrial supply chain to lead the global supply of environmentally and socially

sustainable battery materials.

BNDES stated in the letter that the financing for projects to increase industrial production capacity of critical

minerals is one of the priorities of BNDES’s long term strategy to support the development of a strong, green and

inclusive industrial base in Brazil.

Ana Cabral -Gardner, CEO and Co -Chairman said: “ We are honored and delighted with the Letter of Intention

received today from BNDES. Development Bank Debt awarded by Brazil has the potential to significantly improve

our capital structure due to typical longer duration, significantly lower interest rates and grace periods. Having

BNDES as a creditor represents the support of the government of Brazil to Sigma Lithium ’s industrial expansion

plans at Vale do Jequitinhonha.”

She added “ Despite the recent deterioration in the outlook for lithium demand for the short term, the Company

believes that with the appropriate capital structure enabled by this development bank financing, it has a unique

opportunity to solidify its global industrial competitive leadership in producing low cost and sustainable pre chemical

lithium concentrate. We share with BNDES the belief that the Company’s competitive leadership could become the

vector to attract to Brazil other global industrial player s in the battery supply chain, who are focused in producing

using environmentally and socially sustainable materials supplying the next generation of electric vehicles: aligned

with the ethos of its climate conscious consumers”.

“This BNDES support also allows Sigma to further amplify its transformational impact in the Vale do Jequitinhonha,

one of the poorest regions in the country: illustrating the effects of how a just and inclusive energy transition has

the potential to lift an entire region. Sigma Lithium has been operating with an ESG -centered strategy since it was

founded: it is now producing the most sustainable lithium in the world, staying at the forefront of environmental

practices, effecting economic impact in the community and maintaining a diverse Board with the transparency and

compliance of a Nasdaq US listed public company”, she added.

ABOUT SIGMA LITHIUM

Sigma Lithium (NASDAQ: SGML, BVMF: S2GM34, TSXV: SGML) 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 Quintuple Zero Green Lithium from its Grota do Cirilo

Project in Brazil. Phase 1 of the project is expected to produce 270,000 tonnes of Quintuple 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 Quintuple 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" updated January 18,

2024, which was prepared for Sigma Lithium by Marc -Antoine Laporte, P.Geo, S GS Canada Inc; and Iran Zan,

MAIG, Sigma Lithium. The Updated Technical Report is filed on SEDAR and is also available on the Company’s

website.

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The Amended and Restated Technical Report from January 18, 2024 shows a Consolidated Mineral Resource

on the Grota do Cirilo property of 94.3Mt of Measured and Indicated Resources at a grade of 1.40% Li2O and

Inferred Resources of 14.6Mt also at a grade of 1.37% Li2O.

For more information about Sigma Lithium, visit https://www.sigmalithiumresources.com/

FOR ADDITIONAL INFORMATION PLEASE CONTACT

Mathew DeYoe, EVP of Corporate Affairs & Strategic Development,

+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 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.