Sigma Lithium Appeals Unwarranted Local Court Decision; Addresses 'Fake News'

Key Highlights

• Sigma Lithium is filing a legal appeal against an unwarranted decision issued by a local judge on May 17, 2026.
• The local decision included a potential legal collateral of US$10 million, due only upon a final negative ruling after full legal process.
• The Company asserts due process was not followed and the decision is in dissonance with Brazil's rule of law.
• A negative online "fake news" media campaign was launched against the Company, coinciding with record 1Q26 earnings.
• The "fake news" campaign led to a 15% drop in Sigma Lithium's share price.
• Legal authorities verified the Company's operations conform to environmental rules, including 100% dry stacking and water reuse.
• Over 200 people from neighboring communities attended a public hearing to support the 19,000 jobs generated by the Company.