Sigma Lithium Signs with a Major Brazilian Bank a US$100 Million Collateralized Bank Guarantee

The most recent news (April 2, 2026) announces that Sigma Lithium has signed a US$100 million collateralized bank guarantee with a major Brazilian bank. This guarantee is backed by client letters of credit and export receivables. The primary purpose of this facility is to fund the construction of "Greentech Industrial Plant 2." This expansion is projected to increase the company’s total annual production capacity from 270,000 tonnes to 520,000 tonnes of lithium oxide concentrate (approximately 80,000 tonnes of Lithium Carbonate Equivalent - LCE).

This news is Material - Positive because it provides the definitive financial bridge to Phase 2 expansion. - Capacity Doubling: Moving from 270k to 520k tonnes per year significantly changes the company's cash-flow profile and economies of scale. - Validation of Product: The fact that the guarantee is collateralized by "client guarantees and export receivables" confirms that Sigma has secured binding offtake or sales agreements that banks view as high-quality collateral. - Strategic Shift: This follows a difficult 2025 where the company faced a "severe lithium market downturn" and had to pause/restructure mining operations. This news confirms the company has successfully pivoted back to growth mode. - Cost Efficiency: By replicating Plant 1, the company minimizes engineering risk and leverages its existing sustainable "Quintuple Zero" infrastructure.

Sigma Lithium operates the Grota do Cirilo project in Minas Gerais, Brazil. It is one of the largest hard-rock lithium deposits in the world. The company distinguishes itself through its "Greentech" process, which uses 100% renewable energy, 100% recycled water, and dry-stacks tailings (eliminating the need for hazardous tailings dams). Its flagship product is a high-purity 5.5% to 6% Li2O spodumene concentrate.