OTC · CIK 0001430162
CSANY Cosan S.A.
Insider trading from SEC Form 4. Last filing 28 d ago. Close $4.30 on Oct 9, 2026, +79% from the 52-week low and -21% from the high.
Cosan S.A. (CSANY) has 6 SEC Form 4 filings on file from 5 insiders, the latest filed on Sep 15, 2026. In the last 90 days insiders made 1 open-market buy worth $696k and 0 open-market sells worth $0, net +$696k.
4 open-market trades have been scored at CSANY. The newest: Burkhard Otto Cordes (director) bought $696k of stock on May 18, 2026, filed Sep 15, 2026, scored 39 (weak). The largest of the 4 shown: Marcelo Eduardo Martins (Chief Executive Officer) bought $24M on Apr 10, 2026, scored 64 (notable).
CSANY closed at $4.30 on Oct 9, 2026, 79% above its 52-week low and 21% below its 52-week high.
Last 90 days
Price and insider trades, last year
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at Cosan S.A., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 39Weak | Burkhard Otto Cordes director buy | $696k 159,000 shares | +12% | - | |
| 48Moderate | Rubens Ometto Silveira Mello director sell | $267k 77,640 shares | -100% | +3% from low-45% from high | |
| 34Weak | Maria Rita de Carvalho Drummond Chief Legal Officer sell | $603k 109,400 shares | -5% | +14% from low-30% from high | |
| 64Notable | Marcelo Eduardo Martins Chief Executive Officer buy | $24M 4,040,614 shares | +266% | +17% from low-28% from high |
Transactions
Every row filed, 18 in all.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 11, 2026 | Maria Rita de Carvalho Drummond Chief Legal Officer | JOther COMMON STOCK (BVMF: CSAN3) | +150,496 | $3.90 | $587k | 2,516,572 | 28 d ago |
| Sep 11, 2026 | Rafael Bergman other | JOther COMMON STOCK (BVMF: CSAN3) | +55,242 | $3.90 | $215k | 272,714 | 28 d ago |
| May 18, 2026 | Burkhard Otto Cordes director | POpen-market purchase COMMON STOCK (BVMF: CSAN3)indirect: DGF UBER ALLES FIM CP IE | +89,000 | $4.47 | $398k | 1,439,000 | 28 d ago |
| Sep 11, 2026 | Rafael Bergman other | JOther LONG TERM INCENTIVE (BVMF: CSAN3) | -55,242 | $3.90 | $215k | 0 | 28 d ago |
| Sep 11, 2026 | Maria Rita de Carvalho Drummond Chief Legal Officer | JOther LONG TERM INCENTIVE (BVMF: CSAN3) | -150,496 | $3.90 | $587k | 0 | 28 d ago |
| May 26, 2026 | Burkhard Otto Cordes director | POpen-market purchase COMMON STOCK (BVMF: CSAN3)indirect: DGF UBER ALLES FIM CP IE | +10,000 | $4.27 | $43k | 1,449,000 | 28 d ago |
| May 26, 2026 | Burkhard Otto Cordes director | POpen-market purchase COMMON STOCK (BVMF: CSAN3)indirect: DGF UBER ALLES FIM CP IE | +50,000 | $4.26 | $213k | 1,499,000 | 28 d ago |
| May 26, 2026 | Burkhard Otto Cordes director | POpen-market purchase COMMON STOCK (BVMF: CSAN3)indirect: DGF UBER ALLES FIM CP IE | +10,000 | $4.25 | $43k | 1,509,000 | 28 d ago |
| May 22, 2026 | Rubens Ometto Silveira Mello director | SOpen-market sale Common Stockindirect: Rio das Pedras Acoes | -77,640 | $3.44 | $267k | 0 | May 26, 2026 |
| Apr 10, 2026 | Marcelo Eduardo Martins Chief Executive Officer | POpen-market purchase COMMON STOCK (BVMF: CSAN3) | +1,599,086 | $7.05 | $11M | 3,120,178 | May 21, 2026 |
| Apr 15, 2026 | Maria Rita de Carvalho Drummond Chief Legal Officer | SOpen-market sale COMMON STOCK (BVMF: CSAN3) | -35,800 | $5.57 | $199k | 2,202,136 | May 21, 2026 |
| May 19, 2026 | Marcelo Eduardo Martins Chief Executive Officer | POpen-market purchase COMMON STOCK (BVMF: CSAN3) | +2,441,528 | $5.14 | $13M | 4,890,286 | May 21, 2026 |
| Apr 16, 2026 | Maria Rita de Carvalho Drummond Chief Legal Officer | SOpen-market sale COMMON STOCK (BVMF: CSAN3) | -36,200 | $5.48 | $198k | 2,165,936 | May 21, 2026 |
| Apr 10, 2026 | Marcelo Eduardo Martins Chief Executive Officer | JOther LONG TERM INCENTIVE (BVMF: CSAN3) | -1,552,511 | $7.05 | $11M | 4,794,842 | May 21, 2026 |
| Apr 17, 2026 | Maria Rita de Carvalho Drummond Chief Legal Officer | SOpen-market sale COMMON STOCK (BVMF: CSAN3) | -37,400 | $5.48 | $205k | 2,128,536 | May 21, 2026 |
| May 19, 2026 | Marcelo Eduardo Martins Chief Executive Officer | JOther LONG TERM INCENTIVE (BVMF: CSAN3) | -2,441,528 | $5.14 | $13M | 2,353,314 | May 21, 2026 |
| May 19, 2026 | Maria Rita de Carvalho Drummond Chief Legal Officer | JOther COMMON STOCK (BVMF: CSAN3) | +280,954 | $5.14 | $1.4M | 2,332,228 | May 21, 2026 |
| May 19, 2026 | Maria Rita de Carvalho Drummond Chief Legal Officer | JOther LONG TERM INCENTIVE (BVMF: CSAN3) | -280,954 | $5.14 | $1.4M | 409,122 | May 21, 2026 |
Insiders
Everyone who has filed a Form 4 here.
- Rafael Bergmanother
- Burkhard Otto Cordesdirector
- Maria Rita de Carvalho DrummondChief Legal Officer
- Marcelo Eduardo MartinsChief Executive Officer
- Rubens Ometto Silveira Mellodirector
Questions about CSANY
Answered from the filings on this page, as of the latest one.
Are insiders buying CSANY?
As of Sep 15, 2026, SEC Form 4 filings show 1 open-market buy worth $696k by 1 insider and 0 open-market sells worth $0 by 0 insiders at Cosan S.A. in the last 90 days, net +$696k. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade CSANY on the open market?
Burkhard Otto Cordes (director) bought $696k of CSANY on May 18, 2026 and filed the Form 4 on Sep 15, 2026. InsiderTell scored 39 (weak).
How many insiders file Form 4 at Cosan S.A.?
5 people have filed a Form 4 at Cosan S.A., among them Rafael Bergman (insider), Burkhard Otto Cordes (director), Maria Rita de Carvalho Drummond (Chief Legal Officer). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.