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.
In brief
Cosan S.A. (CSANY) has 8 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).
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, 22 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 |
| Aug 10, 2026 | Marcelo Eduardo Martins Chief Executive Officer | JOther COMMON STOCK (BVMF: CSAN3) | +276,475 | $3.99 | $1.1M | 5,090,732 | Aug 12, 2026 |
| Aug 10, 2026 | Maria Rita de Carvalho Drummond Chief Legal Officer | JOther COMMON STOCK (BVMF: CSAN3) | +103,765 | $3.99 | $414k | 2,407,459 | Aug 12, 2026 |
| Aug 10, 2026 | Marcelo Eduardo Martins Chief Executive Officer | JOther LONG TERM INCENTIVE (BVMF: CSAN3) | -276,475 | $3.99 | $1.1M | 2,074,530 | Aug 12, 2026 |
| Aug 10, 2026 | Maria Rita de Carvalho Drummond Chief Legal Officer | JOther LONG TERM INCENTIVE (BVMF: CSAN3) | -103,765 | $3.99 | $414k | 304,490 | Aug 12, 2026 |
| 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 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 |
| 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 |
| 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 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 |
| 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 |
| 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.