• Sigma Lithium was selected by Nasdaq to ring the closing bell during UN New York Climate Week, citing sustainability leadership in critical minerals.
• The ceremony marks five years since its Nasdaq listing, with Sigma citing progress to the largest lithium oxide concentrate producer in the Americas.
• ESG highlights included 19,000 jobs across 12 municipalities, benefiting about 80,000 family members; community hearings showed over 90% favorable depositions.
• Operational targets cited included 100% renewable electricity, no tailings dams, no potable-water use, no highly toxic chemicals, zero fatalities since inception.
• Sigma said operations continue normally while it contests a preliminary Brazilian court ruling tied to environmental licenses and surface-rights claims.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Sigma Lithium Corporation published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001292814-26-004580), on September 17, 2026, and is solely responsible for the information contained therein.