Sigma Lithium Recognized as Sustainability and Cleantech Pioneer at UN-Climate Week in NY Featuring Lithium Oxide Industrialization; Continues to Operate Following Brazil's Democratic Rule of Law

Toronto, Ontario--(. - September 28, 2026) - Sigma Lithium Corporation NASDAQ:SGML ASX:SAU TSXV:SGML (BVMF: S2GM34) ("Sigma Lithium" or the "Company"), the largest producer of industrial-mineral lithium oxide concentrate in the Americas¹ and dedicated to supplying global producers of b…