CSAN3 Cosan S.A. Insider Trading

Cosan CEO Marcelo Martins acquired 4,040,614 shares totaling $23,820,131.87 in two purchases

Marcelo Eduardo Martins, as Chief Executive Officer of Cosan S.A., executed two separate share purchases totaling 4,040,614 shares for $23,820,131.87 at blended average price of $5.90. The first transaction on 2026-04-10 involved 1,599,086 shares at $7.05, followed by a larger acquisition on 2026-05-19 of 2,441,528 shares at $5.14—a notably lower price point six weeks later. This dual-tranche structure with the second purchase at a significantly reduced price, combined with the substantial dollar commitment from the CEO, reflects a material capital allocation decision by top company leadership. The post-transaction holdings of 2,353,314 shares represent a shift from negative prior holdings, establishing a direct positive stake in the company's performance.

CLO Maria Rita De Carvalho Drummond sells 109,400 shares (3 sales) for $602,808.82 at $5.51 avg; stock now -44.5% from 52-week high

Maria Rita De Carvalho Drummond, Chief Legal Officer, executed 3 separate sales totaling 109,400 shares for $602,808.82 between April 15–17, 2026, at a blended average price of $5.51 per share. Her post-transaction holdings of 409,122 shares represent a -21.1% reduction from her pre-transaction position of 518,522 shares. The sales occurred in a context of significant price deterioration: the stock trades at $3.47 currently, -44.5% from its 52-week high of $6.25, and the 90-day change stands at -31.4%. The timing of this substantial share reduction during a period of extended downward price movement is material context for investors assessing executive confidence in near-term prospects.