Cosan S.A. (CSAN) — real insider trading activity disclosed to the SEC, tracked automatically as new Form 4 filings are reported. Most recent: Cordes Burkhard Otto — 4 open-market purchases between 2026-05-18 and 2026-05-26, totaling $696,030.
Transactions disclosed by company insiders to the SEC on Form 4, most recent first.
| Insider | Role | Date | Shares | Value |
|---|---|---|---|---|
| Drummond Maria Rita de Carvalho | Insider | 2026-09-11 | 150,496 | $586,934 |
| Drummond Maria Rita de Carvalho | Insider | 2026-09-11 | 150,496 | $586,934 |
| Bergman Rafael | Insider | 2026-09-11 | 55,242 | $215,444 |
| Bergman Rafael | Insider | 2026-09-11 | 55,242 | $215,444 |
| Martins Marcelo Eduardo | Chief Executive Officer | 2026-08-10 | 276,475 | $1,103,135 |
| Drummond Maria Rita de Carvalho | Chief Legal Officer | 2026-08-10 | 103,765 | $414,022 |
| Cordes Burkhard Otto | Director | 2026-05-26 | 10,000 | $42,700 |
| Cordes Burkhard Otto | Director | 2026-05-26 | 50,000 | $213,000 |
| Cordes Burkhard Otto | Director | 2026-05-26 | 10,000 | $42,500 |
| Cordes Burkhard Otto | Director | 2026-05-18 | 89,000 | $397,830 |
Position changes disclosed in SEC Form 13F filings. These report a quarterly snapshot, not exact trade dates.
| Fund | Change | Quarter |
|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | RENAISSANCE TECHNOLOGIES LLC reduced this position by 49% ($15,699,956 -> $8,062,220). | 2026-06-30 |
| Aquamarine Financial (Cayman) Ltd | Aquamarine Financial (Cayman) Ltd reduced this position by 30% ($8,639,244 -> $6,039,084). | 2026-06-30 |
| TWO SIGMA INVESTMENTS, LP | TWO SIGMA INVESTMENTS, LP reduced this position by 84% ($2,068,462 -> $328,153). | 2026-06-30 |
| D. E. Shaw & Co., Inc. | D. E. Shaw & Co., Inc. exited a position previously worth $892,091. | 2026-06-30 |
| JANE STREET GROUP, LLC | JANE STREET GROUP, LLC reduced this position by 80% ($1,196,172 -> $245,157). | 2026-06-30 |
| Massar Capital Management, LP | Massar Capital Management, LP reduced this position by 80% ($1,236,709 -> $244,996). | 2026-06-30 |
| AXQ CAPITAL, LP | AXQ CAPITAL, LP exited a position previously worth $220,115. | 2026-06-30 |
| Tejara Capital Ltd | Tejara Capital Ltd exited a position previously worth $252,350. | 2026-06-30 |
Largest reported positions as of 2026-06-30.
| Fund | Value | Shares |
|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | $8,062,220 | 2,799,382 |
| Aquamarine Financial (Cayman) Ltd | $6,039,084 | 2,096,904 |
| Naman Capital Ltda | $783,190 | 271,941 |
| BTG Pactual Asset Management US LLC | $713,318 | 247,680 |
| XTX Topco Ltd | $609,111 | 211,497 |
| MILLENNIUM MANAGEMENT LLC | $341,352 | 118,525 |
| TWO SIGMA INVESTMENTS, LP | $328,153 | 113,942 |
| VANGUARD CAPITAL MANAGEMENT LLC | $318,168 | 110,475 |
| JANE STREET GROUP, LLC | $245,157 | 85,124 |
| Massar Capital Management, LP | $244,996 | 85,068 |
Data compiled from public SEC filings. This is informational reporting, not investment advice.
Cosan S.A. (CSAN) director Cordes Burkhard Otto disclosed another open-market purchase of company stock in a Form 4 filing, continuing a buying pattern that has now stretched across more than a week. On May 26, 2026, Cordes Burkhard Otto purchased 10,000 shares of Cosan at $4.27 per share, a transaction valued at $42,700.00. Following the … Read more