Comparable stake leader
Queluz Holdings Ltd.
SEC ownership of Cosan S.A.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001430162.
Disclosed value leader
Queluz Holdings Ltd.
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- CSAN on NYSE
- Parsed ownership sources
-
13D/G and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Queluz Holdings Ltd.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Queluz Holdings Ltd.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001430162
- Issuer location
- Sao Paulo, Sp, Brazil
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Cosan S.A. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Queluz Holdings Ltd.
Disclosed value leader
Queluz Holdings Ltd.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 21%
13D/G row: Queluz Holdings Ltd.
Showing 1-8 of 50 holder rows.
Quick read
Queluz Holdings Ltd. leads the comparable SEC ownership view at 21%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Queluz Holdings Ltd.'s linked filing trail.
Comparable ownership
Top 5
Queluz Holdings Ltd.
21%
BlackRock, Inc.
6.1%
RENAISSANCE TECHNOLOGIES LLC
0.1%
Monaco Asset Management SAM
0.08%
MARSHALL WACE, LLP
0.06%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Queluz Holdings Ltd. |
13D/G
Rubens Ometto Silveira Mello
|
21%
|
$3,782,639,478
822,312,930 shares
|
+$690,000,000 | 10 Nov 2025 |
| BlackRock, Inc. |
13D/G
13F
Company
|
6.1%
|
$627,623,630
114,321,244 shares
|
$0 | 30 Sep 2024 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
0.1%
|
$15,699,956
3,810,669 shares
|
— | 31 Mar 2026 |
| Monaco Asset Management SAM |
13F
Company
|
0.08%
|
$13,739,430
3,334,813 shares
|
— | 31 Mar 2026 |
| MARSHALL WACE, LLP |
13F
Company
|
0.06%
|
$9,767,739
2,370,810 shares
|
— | 31 Mar 2026 |
| Aquamarine Financial (Cayman) Ltd |
13F
Company
|
0.05%
|
$8,639,244
2,096,904 shares
|
— | 31 Mar 2026 |
| MORGAN STANLEY |
13F
Company
|
0.03%
|
$5,550,965
1,347,320 shares
|
— | 31 Mar 2026 |
| UBS Group AG |
13F
Company
|
0.02%
|
$3,557,366
863,438 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$22,950,241.
Buys
$23,820,132
Insiders: 1
Sells
$869,890
Insiders: 2
Net
+$22,950,241
Shares: +3,853,574
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 4,040,614
Shares: 187,040
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 2,441,528 | 77,640 | $12,549,454 | $267,082 | +$12,282,372 |
| 3-6 | 1,599,086 | 109,400 | $11,270,678 | $602,809 | +$10,667,869 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-10 of 10 reporting-owner rows connected to Cosan S.A.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
10
Largest Forms 3/4/5 holder
Marcelo Eduardo Martins
Net 12M change
+$22,950,241
Latest report
22 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Marcelo Eduardo Martins | Chief Executive Officer, Director | $25,136,070 | +$23,820,132 | +1810% | Filing P/S | 10 Apr 2026 |
| Rubens Ometto Silveira Mello | Director | $0 | -$267,082 | -100% | Mixed | 22 May 2026 |
| Maria Rita de Carvalho Drummond | Chief Legal Officer | -$602,809 | Mixed | 15 Apr 2026 | ||
| Flavia Cruz Simon | Director | Mixed | 18 Mar 2026 | |||
| Ralph Gustavo Rosenberg Whitaker Carneiro | Director | Mixed | 18 Mar 2026 | |||
| Renato Antonio Secondo Mazzola | Director | Mixed | 18 Mar 2026 | |||
| Cordes Burkhard Otto | Director | Mixed | 18 Mar 2026 | |||
| Rafael Bergman | Chief Finance Officer | Mixed | 18 Mar 2026 | |||
| Andre Santos Esteves | Director | Mixed | 18 Mar 2026 | |||
| Luis Claudio Rapparini Soares | Director | Mixed | 18 Mar 2026 |
Recent insider transactions for Cosan S.A.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Rubens Ometto Silveira Mello | CSAN | Common Stock | Sale | -100% | $267,082 | $3.44 | -77,640 | 0 | 22 May 2026 | Rio das Pedras Acoes |
| Marcelo Eduardo Martins | CSAN | LONG TERM INCENTIVE (BVMF: CSAN3) | Other | -50.9% | -2,441,528 | 2,353,314 | 19 May 2026 | Direct | ||
| Marcelo Eduardo Martins | CSAN | COMMON STOCK (BVMF: CSAN3) | Purchase | 99.7% | $12,549,454 | $5.14 | 2,441,528 | 4,890,286 | 19 May 2026 | Direct |
| Maria Rita de Carvalho Drummond | CSAN | LONG TERM INCENTIVE (BVMF: CSAN3) | Other | -40.7% | -280,954 | 409,122 | 19 May 2026 | Direct | ||
| Maria Rita de Carvalho Drummond | CSAN | COMMON STOCK (BVMF: CSAN3) | Other | 13.7% | 280,954 | 2,332,228 | 19 May 2026 | Direct | ||
| Maria Rita de Carvalho Drummond | CSAN | COMMON STOCK (BVMF: CSAN3) | Sale | -1.73% | $204,915 | $5.48 | -37,400 | 2,128,536 | 17 Apr 2026 | Direct |
| Maria Rita de Carvalho Drummond | CSAN | COMMON STOCK (BVMF: CSAN3) | Sale | -1.64% | $198,488 | $5.48 | -36,200 | 2,165,936 | 16 Apr 2026 | Direct |
| Maria Rita de Carvalho Drummond | CSAN | COMMON STOCK (BVMF: CSAN3) | Sale | -1.6% | $199,406 | $5.57 | -35,800 | 2,202,136 | 15 Apr 2026 | Direct |
| Marcelo Eduardo Martins | CSAN | LONG TERM INCENTIVE (BVMF: CSAN3) | Other | -24.5% | -1,552,511 | 4,794,842 | 10 Apr 2026 | Direct | ||
| Marcelo Eduardo Martins | CSAN | COMMON STOCK (BVMF: CSAN3) | Purchase | 105.1% | $11,270,678 | $7.05 | 1,599,086 | 3,120,178 | 10 Apr 2026 | Direct |
* marks a reported price that did not pass the local price check.