// company-profile
Cosan S.A.
CSANExchange: NYSESector: Retail-Auto Dealers & Gasoline StationsInc.: D5Filings: 3Insiders: 3
// activity-summary
Mixed insider activity over the last 30 days: 1 purchase and 1 sale (2 transactions total).
// 90-day insight
Over the last 90 days, Cosan S.A. insiders bought $23.8M (2 transactions) and sold $870K (4 transactions).
- Most active insider: Drummond Maria Rita de Carvalho with 5 transactions totaling $3.5M.
- Largest single purchase: $12.5M by Martins Marcelo Eduardo on May 19, 2026.
Activity skews bearish — sales outpace buys.
Institutional Ownership
Top 13F-HR holders of Cosan S.A. as of 2026-03-31
Total reported AUM
$76.0M
QoQ change
-2.0%
Reporting period
2026-03-31
#1
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
$15.7M
3.8M shares
#2
Monaco Asset Management SAM
CIK 1803593
$13.7M
3.3M shares
#3
Aquamarine Financial (Cayman) Ltd
CIK 2104187
$8.6M
2.1M shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 22, 2026 | Mello Rubens Ometto Silveira | CSAN | Sale | 77,640 | $3.44 | $267K |
| May 19, 2026 | Drummond Maria Rita de Carvalho | CSAN | J | 280,954 | $5.14 | $1.44M |
| May 19, 2026 | Drummond Maria Rita de Carvalho | CSAN | J | 280,954 | $5.14 | $1.44M |
| May 19, 2026 | Martins Marcelo Eduardo | CSAN | J | 2,441,528 | $5.14 | $12.55M |
| May 19, 2026 | Martins Marcelo Eduardo | CSAN | Purchase | 2,441,528 | $5.14 | $12.55M |
5 more transactions hidden
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