Record Peak Production Achieved At Greentech Plant

SAO PAULO - Sigma Lithium Corporation reported that the Greentech Plant has reached record daily peak production of 890 tonnes, equivalent to annualized production of 320,000 tonnes of Triple Zero Green Lithium at battery grade with 5.5% of lithium oxide. As planned, the Company demonstrates it remains on track to achieve annual 2023 production guidance of 130,000 tonnes of Triple Zero Green Lithium. It successfully ramped up its Greentech Plant to enable it to operate at 100% of design nameplate throughput capacity of annualized production of 270,000 tonnes of Triple Zero Green Lithium.

Achieving these targets demonstrates the excellent performance of the Greentech Plant and its tailings dry-stacked circuit in synchronicity with Dense Medium Separation (DMS). The Company has exceeded the design utilization rate of 85%, running at 88%. Throughput has evolved, as planned, from 75% throughput capacity at the end of July 2023 to 100% design capacity, as of Sept. 30, 2023. DMS cyclones operating consistently at 200 tonnes/hour (maximum capacity is 230 tonnes/hour). Greentech Plant global recoveries have been tracking in line with design. The Company has been calibrating "down" the concentrate grade from 5.9% Li2O lithium concentrate.

Sigma Lithium's state-of-the-art Greentech Plant is the first lithium plant in the world to produce chemical grade lithium concentrate without a tailings dam and with 100% reuse of the water utilized in the processing. With 100% dry-stacked tailings and the absence of hazardous chemical products in processing the lithium, the Company is minimizing the risk of water and soil contamination. Actively contributing to the preservation of water and biodiversity (ecosystems of creeks, and "caatinga" vegetation in the region).

Actual ore grade and volumes mined are in line with long term geological and mining models reserves stated at the Company's NI 43101 Technical Report.

Achievement of these milestones is due to the dedication and commitment of the on-site Sigma Lithium team, led by Director of Mining Reinaldo Brandao and Director of Processing Keith Prentice. Over the past three months of their on-site supervision, Reinaldo and Keith have led the operational ramp-up of the Greentech Plant, including the re-engineering of the tailings dry-stacking/water reusage circuit.