• Cosan Chief Legal Officer Maria Rita de Carvalho Drummond reported selling 109,400 common shares on April 15-17 at prices ranging from BRL 5.48 to BRL 5.57.
• Direct holdings in common stock fell to 2,128,536 shares following the April sales.
• On May 19, she reported acquiring 280,954 common shares at BRL 5.14, lifting direct common-stock holdings to 2,332,228 shares.
• She also reported 672,888 ADS held directly.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Cosan SA published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001292814-26-003151), on May 21, 2026, and is solely responsible for the information contained therein.