Sigma Lithium Commences Trading on Australian Securities Exchange, Expands Global Capital Markets Presence

Sigma Lithium announces the approval of the listing by the Australian Securities Exchange ("ASX") as a Foreign Exempt Issuer. The official quotation of Sigma Lithium on ASX commenced at 12:00 p.m. (AEST) on Sept. 3, 2026, under the ticker symbol "SAU" (ASX: SAU). The Australian listing broadens Sigma Lithium's access to one of the world's most established capital markets for lithium and battery materials. The ASX has a long history as a platform for vertically integrated industrial-mineral lithium producers, global peers of Sigma Lithium. The Company has grown a substantial investor base in the Asia Pacific region, and this strategy is expected to broaden Sigma Lithium's exposure among investors in these markets. ASX has a deep and liquid pool of sophisticated investors with a strong understanding of the Company's business, who are limited or restricted to only ASX-listed issuers.

Sigma Lithium successful listing process in Australia can be attributed to: The Company's strong corporate governance throughout 8-years as a publicly traded company. A track record of strict compliance with all applicable laws and regulations. Management of successful delivery of operational excellence.

Toronto, Ontario--(Newsfile Corp. - September 4, 2026) - Sigma Lithium Corporation (NASDAQ: SGML) (ASX: SAU) (TSXV:SGML) (BVMF: S2GM34) ("Sigma Lithium" or the "Company"), the largest producer of industrial lithium oxide concentrate in the Americas¹ and dedicated to supply global producers of batteries for energy security with sustainable and traceable lithium materials, announces that the Australian Securities Exchange ("ASX") approved Sigma Lithium's listing on the ASX, broadening its access to one of the world's most established capital markets for lithium industrial-mineral producers. Achieving the ASX listing is a milestone in the Company's global expansion across capital markets. The ASX provides Sigma Lithium with greater access to an investor base that has a strong understanding of the mining business and a deep expertise in vertically integrated industrial lithium producers supplying the growing demand driven by electrification across Asia Pacific, a key pillar of energy security in the region. Australian capital markets have a deep and liquid pool of sophisticated investors and market participants who are limited or restricted to only ASX-listed issuers. Australia represents a natural extension of the Company's global investor strategy: Sigma Lithium runs the world's fifth largest industrial-mineral lithium production complex, and it is the largest producer of industrial lithium oxide in the Americas¹. The Company's global peers are listed in Australia.

Sigma Lithium was admitted to the official list of the ASX, as an ASX Foreign Exempt Listing, on Sept. 3, 2026: The official quotation of Sigma Lithium CHESS Depositary Interests ("CDIs") commenced at 12:00 p.m. (AEST) on Sept. 3, 2026, under the ticker symbol "SAU" (ASX: SAU). Each CDI represents one fully paid share of common stock (1:1 ratio) of Sigma Lithium over foreign exempt Nasdaq-quoted securities, allowing local institutional investors seamless cross-border clearing. Sigma Lithium's common shares will continue trading on both Nasdaq (dual-primary listing) and TSXv. Sigma Lithium has grown a substantial investor base in the Asia Pacific region and this strategy is expected to broaden its exposure within these markets.

Sigma Lithium's Co-Chair and CEO, Ana Cabral, said " We are honored to join the ASX family of Australian mining companies. Australia is a natural next step in Sigma Lithium's global capital markets journey, as it is a country that is proud of its world class mining companies. Australia is home to one of the world's most sophisticated investor communities for lithium and critical minerals and therefore provides an important platform to broaden our global shareholder base. With an existing capital markets presence in the United States, Canada and Bra...