Cosan S.A. (CSAN) Insider Trading & SEC Filings
Last SEC filing
Cosan S.A. (CSAN) has filed 3 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-05-26. Insiders disclosed 2 open-market purchases totaling $23.82M. Insider sales over the same period: 4 transactions worth $870K. InsiderAlpha tracks every CSAN SEC filing - Form 4, Form 144, and 8-K - in real time, including Rule 10b5-1 plan detection.
About Cosan S.A. (CSAN)
Cosan S.A. trades under the ticker CSAN. InsiderAlpha tracks 3 primary SEC Form 4 filings from 3 reporting insiders for CSAN since 2026, sourced directly from SEC EDGAR.
| SEC CIK | 0001430162 |
|---|
90-Day SEC Filing Activity
| Insider purchases (90d) | 2 ($23.82M) |
|---|---|
| Insider sales (90d) | 4 ($870K) |
| Form 4 filings (90d) | 3 |
| Latest Form 4 filing | 2026-05-26 |
Recent CSAN Insider Transactions (Form 4)
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Rubens Ometto Silveira Mello | Director | S - Open-market sale | 77.6K | $3.44 | $267K | SEC | |
| Maria Rita de Carvalho Drummond | Chief Legal Officer | J - Other acquisition / disposition | 281.0K | $5.14 | $1.44M | SEC | |
| Maria Rita de Carvalho Drummond | Chief Legal Officer | J - Other acquisition / disposition | 281.0K | $5.14 | $1.44M | SEC | |
| Marcelo Eduardo Martins | Chief Executive Officer | P - Open-market purchase | 2.44M | $5.14 | $12.55M | SEC | |
| Marcelo Eduardo Martins | Chief Executive Officer | J - Other acquisition / disposition | 2.44M | $5.14 | $12.55M | SEC | |
| Maria Rita de Carvalho Drummond | Chief Legal Officer | S - Open-market sale | 37.4K | $5.48 | $205K | SEC | |
| Maria Rita de Carvalho Drummond | Chief Legal Officer | S - Open-market sale | 36.2K | $5.48 | $198K | SEC | |
| Maria Rita de Carvalho Drummond | Chief Legal Officer | S - Open-market sale | 35.8K | $5.57 | $199K | SEC | |
| Marcelo Eduardo Martins | Chief Executive Officer | J - Other acquisition / disposition | 1.55M | $7.05 | $10.94M | SEC | |
| Marcelo Eduardo Martins | Chief Executive Officer | P - Open-market purchase | 1.60M | $7.05 | $11.27M | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Cosan S.A. (CSAN). Updated in real time as new filings are submitted to the SEC.
Most-Active CSAN Insiders - Last 90 Days
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Maria Rita de Carvalho Drummond | 5 | $3.49M |
| Marcelo Eduardo Martins | 4 | $47.31M |
| Rubens Ometto Silveira Mello | 1 | $267K |
Recent Insider Filings
- - Rubens Ometto Silveira Mello (Director)
- - Marcelo Eduardo Martins (Chief Executive Officer)
- - Maria Rita de Carvalho Drummond (Chief Legal Officer)
Form 4 Transaction Code Reference
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in CSAN insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
CSAN Insider Trading - FAQ
- What is the latest insider trade for CSAN?
- Cosan S.A. (CSAN) had 3 insider filings in the last 90 days, with the most recent on 2026-05-26. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
- How many insiders are buying CSAN stock?
- 2 insider purchases of CSAN were filed in the last 90 days, totaling $23.82M.
- How many insiders are selling CSAN stock?
- 4 insider sales of CSAN were filed in the last 90 days, totaling $870K.
- Where can I see CSAN SEC filings (Form 4, 10-K, 10-Q, 8-K)?
- This page tracks CSAN Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Learn More
- What is SEC Form 4?
- How to read insider buying signals
- Rule 10b5-1 trading plans explained
- The cluster buying signal
Open the live CSAN dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.