Sigma is a mineral development company that is advancing into pilot production stage an environmentally focused lithium project in Minas Gerais, Brazil to produce battery grade spodumene concentrate from its high-quality deposits. Sigma corporate purpose is to execute its strategy while embracing environmental, social, and governance (“ESG”​) principles. Sigma has 28 mineral rights in four properties spread over 188 km² and 18,887 hectares with over 200 lithium bearing pegmatites and 11 former historical lithium mines. The Grota do Cirilo property, Sigma’s primary focus, includes 10 mining concessions (mining production authorizations) and is currently undergoing a 20,000m drilling campaign for resource expansion. Sigma has a National Instrument 43-101 (“NI 43-101″​) technical report on the Grota do Cicilo property prepared by SGS Canada-Geostat (“SGS”​), which includes estimated measured and indicated resources of approximately 12,900,000 tonnes for its main deposit (8,502,000t measured and 4,385,000t indicated), with a high average grade of 1.56% (for approximately 5,000,000t of LCE). The technical report also includes estimated inferred resources of 608,348t and further notes the potential for significant resource expansion.