SGMA Sigma Lithium Corporation

SIGMA Lithium Resources Corporation (“Sigma” or the “Company”) ( TSX-V: SGMA ) ( OTC- QB: SGMLF ) has filed its audited consolidated financial and operating results and management’s discussion and analysis (“MD&A”) for the year ended December 31, 2020. The MD&A includes a comprehensive technical and corporate update to April 30, 2020. The financial statements and MD&A are available at on SEDAR (www.sedar.com) and at the Company corporate website at the following links: https://www.sigmalithiumresources.com/wp-content/uploads/2021/05/Sigma-FS-YE-2020-Final.pdf and https://www.sigmalithiumresources.com/wp-content/uploads/2021/05/Sigma-YE-2020-MDA-Final.pdf.

During this transformative 2020 year, the Company continued to demonstrate its development, commercial and market relevance by significantly advancing its strategic goals on three fronts: near-term production scheduled for 2022, studying the viability of production expansion contemplated for 2023, and the determination of the ultimate extent and unique high-purity quality of mineral resources at the Company´s wholly-owned Grota do Cirilo Project, all while maintaining its strategic leadership in ESG in the lithium supply chain.

The Company announces that it is considering a potential listing of its shares in the United States with a view to increasing access to U.S. capital and enhancing overall shareholder value. This follows the United States Department of State and Brazil Ministry of Mines and Energy launching the U.S. – Brazil bilateral cooperation in Critical Minerals, including lithium. This adds to the Company´s current relationships in Japan, South Korea and specialist chemical tolling partners in China.

ABOUT SIGMA LITHIUM

Sigma is a Canadian company developing, with an environmental sustainably ESG focused strategy, the largest hard rock lithium deposits in the Americas, located in its wholly owned Grota do Cirilo Project in Brazil (the “Project”). The Company has been producing low carbon high purity lithium concentrate at an on-site demonstration pilot plant (the “Pilot Plant”) since 2018. This pilot production has been an important part of the successful commercial strategy of the Company, shipping samples of its low carbon “green & sustainable” high purity lithium to leading global potential customers, for product certification and testing, with the goal of participating in the rapidly expanding electric vehicle (“EV”) supply chain.

The Company is in pre-construction and detailed engineering of an environmentally friendly, fully automated, dense media separator (“DMS”) production plant, that will apply proprietary algorithms to digitally control the dense media. 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 ESG practices, which were established as part of its core purpose at inception in 2012. The 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 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.

FOR ADDITIONAL INFORMATION PLEASE CONTACTAna Cabral-Gardner(Sao Paulo) +55 11 2985-0089 ana.cabral@sigmaca.com

FORWARD-LOOKING STATEMENTS

This news release includes certain "forward-looking statements" under applicable Canadian securities legislation including statements relating to the ultimate duration, impact and severity of the COVID-19 pandemic (including its impact on financial markets and national and multinational economies generally, and its impact on the growth of the electric vehicle market and other impacts on the demand for lithium products) and other forward-looking statements. Forward-looking statements are necessarily based upon a number of estimates and assumptions that, while considered reasonable, are subject to known and unknown risks, uncertainties, and other factors which may cause the actual results and future events to differ materially from those expressed or implied by such forward-looking statements. All statements that address future plans, activities, events, or developments that the Company believes, expects or anticipates will or may occur are forward-looking information, including statements regarding the potential development of resources and drilling plans which may or may not occur. Forward-looking statements and information contained herein are based on certain factors and assumptions regarding, among other things, the ability to complete the Annual Filings and Interim Filings; the market price of the Company's securities, metal prices, exchange rates, taxation, the estimation, timing and amount of future exploration and development, capital and operating costs, the availability of financing, the receipt of regulatory approvals, environmental risks, title disputes, litigation risks, failure of plant, equipment or processes to operate as anticipated, accidents, labour disputes, claims and limitations on insurance coverage and other risks of the mining industry, changes in national and local government regulation of mining operations, and regulations and other matters including the COVID-19 pandemic. 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 statements. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result 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 our public filings available 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.