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Cosan S.A. (New York Stock Exchange:CSAN)
BR · Delayed Price · Currency is USD
2.75-0.04 (-1.61%)
Insider Score
––Not scored
CSAN Insider Score
Insiders here have filed 8 Form 4s in the last 90 days, but all of them are share awards, grants or other non-market transactions. Those are compensation, not a decision to buy, so they are not scored.
CSAN Stock Insider Trading Activity
CSAN stock’s insider trading shows 5 purchases for an estimated $13.25M and 1 sale on the open market for an estimated $267.08K by company insiders over the last 6 months.
Not enough price history.
Prices below may not match the quote above. More than one filer reports under CSAN, so the quote above may belong to a different issuer than some of the filings below.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Drummond Maria Rita de Carvalho Other | Other | 150,496 | $3.90 | $586,934 | 100% | 0 | Sep 11, 2026 | — | Form 4 |
| Bergman Rafael Other | Other | 55,242 | $3.90 | $215,444 | 25.4% | 272,714 | Sep 11, 2026 | — | Form 4 |
| Bergman Rafael Other | Other | 55,242 | $3.90 | $215,444 | 100% | 0 | Sep 11, 2026 | — | Form 4 |
| Drummond Maria Rita de Carvalho Other | Other | 150,496 | $3.90 | $586,934 | 6.4% | 2,516,572 | Sep 11, 2026 | — | Form 4 |
| Drummond Maria Rita de Carvalho Other | Other | 103,765 | $3.99 | $414,022 | 4.5% | 2,407,459 | Aug 10, 2026 | — | Form 4 |
| Drummond Maria Rita de Carvalho Other | Other | 103,765 | $3.99 | $414,022 | 25.4% | 304,490 | Aug 10, 2026 | — | Form 4 |
| Martins Marcelo Eduardo CEO | Other | 276,475 | $3.99 | $1,103,135 | 5.7% | 5,090,732 | Aug 10, 2026 | — | Form 4 |
| Martins Marcelo Eduardo CEO | Other | 276,475 | $3.99 | $1,103,135 | 11.8% | 2,074,530 | Aug 10, 2026 | — | Form 4 |
| Cordes Burkhard Otto Director | Buy | 10,000 | $4.25 | $42,500 | 0.7% | 1,509,000 | May 26, 2026 | DDilution | Form 4 |
| Cordes Burkhard Otto Director | Buy | 10,000 | $4.27 | $42,700 | 0.7% | 1,449,000 | May 26, 2026 | DDilution | Form 4 |
| Cordes Burkhard Otto Director | Buy | 50,000 | $4.26 | $213,000 | 3.5% | 1,499,000 | May 26, 2026 | DDilution | Form 4 |
| Mello Rubens Ometto Silveira Director | Sell | 77,640 | $3.44 | $267,082 | 100% | 0 | May 22, 2026 | — | Form 4 |
| Drummond Maria Rita de Carvalho Other | Other | 280,954 | $5.14 | $1,444,104 | 40.7% | 409,122 | May 19, 2026 | — | Form 4 |
| Martins Marcelo Eduardo CEO | Other | 2,441,528 | $5.14 | $12,549,454 | 50.9% | 2,353,314 | May 19, 2026 | — | Form 4 |
| Martins Marcelo Eduardo CEO | Buy | 2,441,528 | $5.14 | $12,549,454 | 99.7% | 4,890,286 | May 19, 2026 | A+CEO BuyBig BuyDilution | Form 4 |
| Drummond Maria Rita de Carvalho Other | Other | 280,954 | $5.14 | $1,444,104 | 13.7% | 2,332,228 | May 19, 2026 | — | Form 4 |
| Cordes Burkhard Otto Director | Buy | 89,000 | $4.47 | $397,830 | 6.6% | 1,439,000 | May 18, 2026 | CFirst BuyDilution | Form 4 |
| Drummond Maria Rita de Carvalho Other | Sell | 37,400 | $5.48 | $204,952 | 1.7% | 2,128,536 | Apr 17, 2026 | — | Form 4 |
| Drummond Maria Rita de Carvalho Other | Sell | 36,200 | $5.48 | $198,376 | 1.6% | 2,165,936 | Apr 16, 2026 | — | Form 4 |
| Drummond Maria Rita de Carvalho Other | Sell | 35,800 | $5.57 | $199,406 | 1.6% | 2,202,136 | Apr 15, 2026 | — | Form 4 |
| Martins Marcelo Eduardo CEO | Buy | 1,599,086 | $7.05 | $11,273,556 | 105% | 3,120,178 | Apr 10, 2026 | A+First BuyStake DoublerDilution | Form 4 |
| Martins Marcelo Eduardo CEO | Other | 1,552,511 | $7.05 | $10,945,203 | 24.5% | 4,794,842 | Apr 10, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Buy (P) — Open-market or private purchase
- Sell (S) — Open-market or private sale
- Other (J) — Other acquisition or disposition — the filing explains it in a footnote
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.