4 insiders reported 14 Form 4 transactions for Cosan S.A. (CSAN) over the past 18 months (most recent 2026-08-12). Recent activity: Drummond Maria Rita de Carvalho (Chief Legal Officer) Buy 103,765 shares, Martins Marcelo Eduardo (Chief Executive Officer) Sell 276,475 shares, Drummond Maria Rita de Carvalho (Chief Legal Officer) Sell 103,765 shares, Martins Marcelo Eduardo (Chief Executive Officer) Buy 276,475 shares, Cordes Burkhard Otto (Director) Buy 89,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-12 | Drummond Maria Rita de Carvalho | Chief Legal Officer | Buy | 103,765 | $414,022 |
| 2026-08-12 | Martins Marcelo Eduardo | Chief Executive Officer | Sell | 276,475 | $1.1M |
| 2026-08-12 | Drummond Maria Rita de Carvalho | Chief Legal Officer | Sell | 103,765 | $414,022 |
| 2026-08-12 | Martins Marcelo Eduardo | Chief Executive Officer | Buy | 276,475 | $1.1M |
| 2026-06-09 | Cordes Burkhard Otto | Director | Buy | 89,000 | $397,830 |
| 2026-06-09 | Cordes Burkhard Otto | Director | Buy | 10,000 | $42,700 |
| 2026-06-09 | Cordes Burkhard Otto | Director | Buy | 50,000 | $213,000 |
| 2026-06-09 | Cordes Burkhard Otto | Director | Buy | 10,000 | $42,500 |
| 2026-05-26 | Mello Rubens Ometto Silveira | Director | Sell | 77,640 | $267,082 |
| 2026-05-21 | Drummond Maria Rita de Carvalho | Chief Legal Officer | Buy | 280,954 | $1.4M |
| 2026-05-21 | Drummond Maria Rita de Carvalho | Chief Legal Officer | Sell | 35,800 | $199,406 |
| 2026-05-21 | Drummond Maria Rita de Carvalho | Chief Legal Officer | Sell | 36,200 | $198,488 |
| 2026-05-21 | Drummond Maria Rita de Carvalho | Chief Legal Officer | Sell | 37,400 | $204,915 |
| 2026-05-21 | Drummond Maria Rita de Carvalho | Chief Legal Officer | Sell | 280,954 | $1.4M |
Source: SEC Form 4 filings · as of 2026-08-12