6-K

UNITEDSTATES****SECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TORULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of June 2023

Commission File Number: 001-40786

SigmaLithium Corporation

(Translation of registrant's name into English)

2200 HSBC Building

885 West Georgia Street

Vancouver, British Columbia

V6C3E8

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ¨      Form 40-F x

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

**Note:**Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K if submitted solely to provide an attached annual report to security holders.

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

**Note:**Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if submitted to furnish a report or other document that the registrant foreign private issuer must furnish and make public under the laws of the jurisdiction in which the registrant is incorporated, domiciled or legally organized (the registrant's "home country"), or under the rules of the home country exchange on which the registrant's securities are traded, as long as the report or other document is not a press release, is not required to be and has not been distributed to the registrant's security holders, and, if discussing a material event, has already been the subject of a Form 6-K submission or other Commission filing on EDGAR.

EXHIBIT INDEX

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Exhibit 99.1

SIGMA LITHIUM TO PRESENT AT J.P. MORGAN ENERGY,POWER & RENEWABLES CONFERENCE

VANCOUVER, CANADA – (June 21, 2023) – SIGMA LithiumCorporation (“Sigma Lithium” or the “Company”) (NASDAQ: SGML, TSXV: SGML), dedicated to powering the next generation of electric vehicles with environmentally sustainable and high-purity lithium, is pleased to announce that it will present and participate at the J.P. Morgan Energy, Power & Renewables Conference in New York City on June 21 & 22.

J.P. Morgan Energy, Power & Renewables Conference

InterContinental New York Barclay in New York, New York

Presentation Date: June 21, 2023

The Company will be available at the conference for one-on-one meetings. Investors may contact their J.P. Morgan representative to participate. Webcast replay will be available following the conference on Sigma Lithium’s investor relations website at https://sigmalithiumresources.gcs-web.com for a limited time.

ABOUT SIGMA LITHIUM

Sigma Lithium (NASDAQ: SGML, TSXV: SGML) is a company dedicated to powering the next generation of electric vehicle batteries with environmentally sustainable and high-purity lithium.

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 Green Lithium from its Grota do Cirilo Project in Brazil. Phase 1 of the project is expected to produce 270,000 tonnes of Green Lithium annually (36,700 LCE annually). Phase 2 & 3 of the project are expected to increase production to 766,000 tonnes annually (or 104,200 LCE annually), assuming the detailed engineering workstream and FEL3 CAPEX assessment currently being conducted by DRA supports an investment decision. The project produces Green Lithium in a state-of-the-art Greentech lithium plant that uses 100% renewable energy, 100% recycled water and 100% dry-stacked tailings. Please refer to the Amended and Restated Technical Report, which 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 INFORMATIONPLEASE CONTACT

Jamie Flegg, Chief Development Officer

+1 (647) 706-1087

jamie.flegg@sigmalithium.com.br

Daniel Abdo, Chief Communications Officer

+55 11 2985-0089

daniel.abdo@sigmalithium.com.br

Sigma Lithium

FORWARD-LOOKING STATEMENTS

This news release includes certain "forward-lookinginformation" under applicable Canadian and U.S. securities legislation, including but not limited to statements relating to timingand costs related to the general business and operational outlook of the Company, the environmental footprint of tailings and positiveecosystem 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 operationalstatus of the Groto 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-lookinginformation 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 demandis 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 intomineral reserves; and the Company’s ability to operate its mineral projects including that the Company will not experience anymaterials or equipment shortages, any labour or service provider outages or delays or any technical issues. Although management believesthat the assumptions and expectations reflected in the forward-looking information are reasonable, there can be no assurance that theseassumptions 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 market prices for lithium may not remain at current levels; and the market for electric vehiclesand other large format batteries currently has limited market share and no assurances can be given for the rate at which this marketwill develop, if at all, which could affect the success of the Company and its ability to develop lithium operations. There can be noassurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipatedin such statements. Accordingly, readers should not place undue reliance on forward-looking information. The Company disclaims any intentionor obligation to update or revise any forward-looking information, whether because of new information, future events or otherwise, exceptas required by law. For more information on the risks, uncertainties and assumptions that could cause our actual results to differ fromcurrent expectations, please refer to the current annual information form of the Company and other public filings available under theCompany’s profile at www.sedar.com.

Neither the TSX Venture Exchange nor itsRegulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacyor accuracy of this news release.