Sigma Lithium Corporation (?Sigma Lithium? or the ?Company?) announced the internal promotions of three exceptional senior leaders, rewarding their outstanding operational accomplishments. Meritocracy Driven Culture: Promoting Exceptional Internal Leaders to co-General Managers: Sigma Lithium is formally appointing as co-General Managers the Director of Mining Reinaldo Brandao, Director of Processing Keith Prentice, and Director of Geology and Regional Institutional Relations Iran Zan.

For almost four months they have successfully overseen Sigma Lithium?s technical operations on-site in Brazil. They live permanently in Aracuai, at Vale do Jequitinhonha. Reinaldo and Keith have most recently been responsible for the critical commissioning and production ramp up of the Company?s Greentech Plant, including the re-engineering of the tailings dry-stacking/water reusage circuit to full functionality and subsequent achievement of peak daily production annualized at 320,000 tonnes/year, as previously announced on October 2, 2023.

Keith and Reinaldo have been working with the Company since 2022. They led their respective teams of mining and processing on-site, during the execution of the construction of the Greentech Plant and Mine of Phase 1. In addition to their operational roles, they also lead the detailed engineering of Sigma Lithium?s Production expansion (Phases 2 & 3). Iran Zan was the second employee hired by Sigma in 2012.

He has had multiple leadership roles: senior geologist, operational director, director of regional institutional relations and head of geology. During the pandemic in 2020, Iran became operational director on-site. Subsequently he became Director of Regional Institutional Relations and Head of Geology.

Brian Talbot Resigned for Health Reasons, Effective September 2023. In addition, Sigma Lithium informs the resignation of Brian Talbot, following a period of intermittent personal leaves that required his extended absences from Brazil, starting at the end of June 2023. Brian advised the CEO and Board of Directors in July 2023 that he was to retire from his role as technical lead for health reasons.

Mr. Talbot was not an officer nor a board member of Sigma Lithium. Biographies of Appointed Co-General Managers: Reinaldo Brandaois a senior mining executive with over 30 years of industry experience in complex mine systems operation from pit to port in global companies of mining and metallurgy. He holds a degree in Filtration Dry Stacking of Iron Ore Tailings from USP - Escola Politécnica da Universidade de São Paulo.

Reinaldo has extensive experience in greenfield projects involving R&D and implementation, as well as operations with a focus on sustainability and ESG. Prior to joining Sigma Lithium, Reinaldo was a senior mining and metallurgy consultant at Norsk Hydro, as well as COO of Iron Ore at Anglo American Brazil, and COO and Mining Managing Director (CEO) of Vallourec & Sumitomo Brazil. Reinaldo began his career in mining leadership at Vale, where he held roles including Mining Automation Manager, Mine Operations Coordinator, and various engineering positions.

Reinaldo has a PhD in mine planning from Universidade Federal de Ouro Preto and He also received an MS in Engineering and a Bachelors in Mining Engineering from Escola De Minas. Keith Prentice is a seasoned leader in mine development and construction, with significant experience in Africa and internationally. Keith was formerly the Director of Processing at Sigma Lithium, where he most recently co-led the operational ramp-up of the Greentech Plant.

Prior to joining Sigma Lithium, Keith served in leadership roles at Sierra Rutile Limited and Okavango Mining Engineering, where he developed and implemented major capital projects, managed project risk and mitigation, and worked alongside executive management on forecasting and reporting. Keith's experience also includes roles as General Manager of Business Development at ELB/PBA Engineering and Departmental Head of Process at Kenmare Resources Plc. Earlier in his career, Keith spearheaded mining projects across Africa, and held various managerial positions at De Beers.

Keith holds a degree in Extraction Metallurgy from the School of Mines at the University of Johannesburg and a Production Management Diploma from Technikon RSA. Iran Zan is a geologist with over 12 years of professional experience in mining. Throughout his career, his work has included exploration and operational geology as well as administrative management in the pre-construction, implementation, and pre-operation phases of lithium and heavy minerals mines.

Iran has held senior positions as Director of Community Relations and Institutions and Senior Exploration Geologist at Sigma Lithium over the past seven years. Previously, Iran was a Full Exploration Geologist at Mineração Taboca S.A. and Yamana Gold Inc. Iran holds a bachelor?s degree in Geology and Geosciences from the Universidade Estadual de Campinas.