Ms. Anna Hartley reports

SIGMA LITHIUM TO RELEASE FOURTH QUARTER 2025 EARNINGS RESULTS ON MARCH 30, 2026

Sigma Lithium Corp. will release its fourth quarter 2025 earnings results before the market opens on Monday, March 30, 2026.

The company will hold a conference call to discuss its fourth quarter 2025 earnings results shortly after, on Monday, March 30, 2026, at 8:30 a.m. ET. Access to the call will be available via webcast. A link to the webcast can be found on Sigma Lithium's website.

Webcast details:

Event title:  Sigma Lithium fourth quarter 2025 earnings results call

Event date:   March 30, 2026

Start time:  8:30 a.m. ET

About Sigma Lithium Corp.

Sigma Lithium is a leading global lithium producer dedicated to powering the next generation of electric batteries with socially and environmentally sustainable lithium oxide concentrate.

The company operates one of the world's largest lithium production sites at its Grota do Cirilo operation in Brazil. Sigma Lithium is at the forefront of environmental and social sustainability in the electric battery materials supply chain. The company's greentech industrial plant combines dry stacking, the reuse of 100 per cent of water, zero use of toxic chemicals and the use of 100-per-cent renewable electricity. For more than two years Sigma Lithium has not experienced an accident with lost time.

Sigma Lithium currently has a nameplate capacity to produce 270,000 tonnes of lithium oxide concentrate on an annualized basis at its mine and state-of-the-art greentech industrial plant. The company has initiated the construction of a second plant to increase its production capacity to 520,000 tonnes.

We seek Safe Harbor.