GROTA DO CIRILO LITHIUM PROJECT ARAÇUAÍ AND ITINGA REGIONS, MINAS GERAIS, BRAZIL AMENDED AND RESTATED TECHNICAL REPORT Prepared for: Sigma Lithium Corporation Prepared by: Homero Delboni Jr., MAusIMM (CP), HDA Serviços S/S Ltda. Marc-Antoine Laporte, P.Geo, SGS Canada Inc Jarrett Quinn, P.Eng., Consulting Process Engineer Porfirio Cabaleiro Rodriguez, (MEng), FAIG, GE21 Consultoria Mineral Noel O'Brien, FAusIMM, Trinol Pty Ltd. Effective Date: 31 October 2022 Issue Date: 12 June 2023 NI DO IMPORTANT NOTICE ...

Exhibit 99.1 SIGMA LITHIUM CORPORATION MANAGEMENT'S DISCUSSION AND ANALYSIS THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2022 (Expressed in thousands of Canadian dollars, except per share amounts or unless stated otherwise) INTRODUCTION & BACKGROUND This management's discussion and analysis dated as of November 17, 2022 (this "MD&A") of the financial condition and results of operations of Sigma Lithium Corporation ("Sigma Lithium" or the "Company") constitutes management's review of the factors that affected t ...

Sigma Lithium Corporation (NASDAQ:SGML) Q4 2021 Results Conference Call April 11, 2022 11:00 AM ET Company Participants Calvyn Gardner - Co-Chairperson and Co-CEO Ana Cabral Gardner - Co-Chairperson and Co-CEO Unidentified Company Representative So, everyone, look, I apologize for the delay. We had technical difficulties, each one of us in a different part of the world. IÂ'm on a West Coast of United States, and Calvyn is on the mine site. Without further ados, we have great updates to give you. So, weÂ're ...