CSAN
Cosan S.A.
Cosan S.A. insider trading
Insiders at Cosan S.A. have been buying its stock on the open market. The largest purchase in the last 30 days was Cordes Burkhard Otto (Director) buying $397.8K of CSAN, filed Sep 15, 2026. Every open-market purchase and sale its officers, directors and 10% owners filed in that time is listed below, each linked to the original Form 4.
- Bought on the open market
- $696K
- Sold
- —
- Insiders
- 1
- Latest trade
- May 18, 2026
From SEC filings · last 30 days
Recent CSAN insider transactions
Cordes Burkhard OttoDirector
Bought 89,000 sh at $4.47 · May 18, 2026
$397.8K
FilingCordes Burkhard OttoDirector
Bought 50,000 sh at $4.26 · May 26, 2026
$213K
FilingCordes Burkhard OttoDirector
Bought 10,000 sh at $4.27 · May 26, 2026
$42.7K
FilingCordes Burkhard OttoDirector
Bought 10,000 sh at $4.25 · May 26, 2026
$42.5K
Filing
SEC Form 4 data, Q3 2024 to Q2 2026
CSAN insider trading by quarter
Between Jul 01, 2024 and Jun 30, 2026, 3 insiders traded CSAN on the open market: 2 purchases worth $23.8M and 4 sales worth $869.8K. In the last four quarters alone: 2 purchases ($23.8M) and 4 sales ($869.8K), by 3 insiders.
| Quarter | Bought | Sold | Insiders |
|---|---|---|---|
| Q2 2026 | +$23.8M2 buys | −$869.8K4 sales | |
| Q1 2026 | — | — | |
| Q4 2025 | — | — | |
| Q3 2025 | — | — | |
| Q2 2025 | — | — | |
| Q1 2025 | — | — | |
| Q4 2024 | — | — | |
| Q3 2024 | — | — |
- Largest purchase
- +$12.5M of CSAN by Martins Marcelo Eduardo (Chief Executive Officer · Director) on May 19, 2026.
- Largest sale
- −$267.1K of CSAN by Mello Rubens Ometto Silveira (Director) on May 22, 2026.
Open-market transactions through Jun 30, 2026most recent first
Mello Rubens Ometto Silveira
Director
−$267.1K
May 22, 2026
77,640 sh · $3.44
Martins Marcelo Eduardo
Chief Executive Officer · Director
+$12.5M
May 19, 2026
2,441,528 sh · $5.14
Drummond Maria Rita de Carvalho
Chief Legal Officer
−$205K
Apr 17, 2026
37,400 sh · $5.48
Drummond Maria Rita de Carvalho
Chief Legal Officer
−$198.4K
Apr 16, 2026
36,200 sh · $5.48
Drummond Maria Rita de Carvalho
Chief Legal Officer
−$199.4K
Apr 15, 2026
35,800 sh · $5.57
Martins Marcelo Eduardo
Chief Executive Officer · Director
+$11.3M
Apr 10, 2026
1,599,086 sh · $7.05
| Date | Insider | Shares | Price | Value |
|---|---|---|---|---|
| May 22, 2026 | Mello Rubens Ometto SilveiraDirector | 77,640 | $3.44 | −$267.1K |
| May 19, 2026 | Martins Marcelo EduardoChief Executive Officer · Director | 2,441,528 | $5.14 | +$12.5M |
| Apr 17, 2026 | Drummond Maria Rita de CarvalhoChief Legal Officer | 37,400 | $5.48 | −$205K |
| Apr 16, 2026 | Drummond Maria Rita de CarvalhoChief Legal Officer | 36,200 | $5.48 | −$198.4K |
| Apr 15, 2026 | Drummond Maria Rita de CarvalhoChief Legal Officer | 35,800 | $5.57 | −$199.4K |
| Apr 10, 2026 | Martins Marcelo EduardoChief Executive Officer · Director | 1,599,086 | $7.05 | +$11.3M |
From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.
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Questions
- Are CSAN insiders buying or selling?
- Between May 26, 2026 and May 18, 2026, 1 Cosan S.A. insider made 4 open-market purchases worth $696K and no sales, a net purchase of $696K.
- How much CSAN stock have insiders bought and sold in the last two years?
- Between Jul 01, 2024 and Jun 30, 2026, 3 Cosan S.A. insiders made 2 open-market purchases worth $23.8M and 4 sales worth $869.8K. In the four quarters to Jun 30, 2026: 2 purchases ($23.8M) and 4 sales ($869.8K). The largest purchase was Martins Marcelo Eduardo buying $12.5M on May 19, 2026. The largest sale was Mello Rubens Ometto Silveira selling $267.1K on May 22, 2026.
- What was the largest recent CSAN insider trade?
- Cordes Burkhard Otto (Director) bought $397.8K of CSAN stock on May 18, 2026 at about $4.47 a share.
- When did an insider last buy CSAN shares?
- The most recent open-market purchase on file is Cordes Burkhard Otto (Director) buying $213K on May 26, 2026. The largest purchase in the period was $397.8K by Cordes Burkhard Otto.
- Where does CSAN insider trading data come from?
- From the Form 4 filings Cosan S.A.'s officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.
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