Cosan S.A. Material Fact: Second Public Offering

Cosan S.A. announced a primary offering (Second Public Offering) of common shares today, November 3, 2025.

• Offering Size: Initially 187.5 million Shares, with an option to increase by up to 100 million shares based on demand.
• Price: Fixed at R$5.00 per Share, consistent with the October 23rd offering.
• Target Audience: Directed to professional investors in Brazil, Qualified Institutional Buyers (QIBs) in the US (Rule 144A), and non-U.S. institutional investors (Reg S).
• Regulatory Note: The offering is *