United States

Cosan S.A.

Track

Over the last 90 days, Cosan S.A. saw significant insider buying, primarily from CEO Marcelo Eduardo Martins, totaling over $23.8 million. This contrasts with smaller sell-offs, including transactions by Chief Legal Officer Maria Rita de Carvalho Drummond. The net activity indicates a strong buying trend among insiders.
Top insiders
Trades
Mello Rubens Ometto Silveira
1 sale — total 100,000 USD
Sale 22 May 2026
Value US$547,797.94 | Price 332.12 | Shares 68,800
Buy 19 May 2026
Value US$3,700,711.40 | Price 101.41 | Shares 15,769
Sale 17 Apr 2026
Value US$100,000.00 | Price 5.48 | Shares 1,000
Sale 16 Apr 2026
Value US$100,000.00 | Price 5.48 | Shares 1,000
Sale 15 Apr 2026
Value US$100,000.00 | Price 5.57 | Shares 1,000
Buy 10 Apr 2026
Value US$100,000.00 | Price 7.05 | Shares 1,000
Proposed sale 4 Apr 2024
Value US$1,860,000.00 | Price 12.40 | Shares 150,000
Proposed sale 3 Apr 2024
Value US$2,441,860.00 | Price 12.21 | Shares 200,000
Proposed sale 2 Apr 2024
Value US$3,155,725.00 | Price 12.29 | Shares 256,723
Proposed sale 1 Apr 2024
Value US$475,981.00 | Price 12.45 | Shares 38,241
Proposed sale 5 Jul 2023
Value US$3,064,000.00 | Price 15.32 | Shares 200,000
Proposed sale 14 Apr 2023
Value US$120,426.89 | Price 12.68 | Shares 9,500
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-05-26 2026-05-22 S Sale
Mello Rubens Ometto Silveira
Non-Executive Director
68,800 -43.2%
332.12
US$547,798 		68,800 -43.2% 332.12 US$547,798
2026-05-21 2026-05-19 B Purchase
Martins Marcelo Eduardo

Chief Executive Officer

Executive Director
15,769 -30.5%
101.41
US$3,700,711 		15,769 -30.5% 101.41 US$3,700,711
2026-05-21 2026-04-17 S Sale
Drummond Maria Rita de Carvalho

Chief Legal Officer

Officer
4,227 +37.3%
204.87
US$4,609,954 		4,227 +37.3% 204.87 US$4,609,954
2026-05-21 2026-04-16 S Sale
Drummond Maria Rita de Carvalho

Chief Legal Officer

Officer
1,000 -1.6%
5.48
US$100,000 		1,000 -1.6% 5.48 US$100,000
2026-05-21 2026-04-15 S Sale
Drummond Maria Rita de Carvalho

Chief Legal Officer

Officer
1,000 -1.6%
5.57
US$100,000 		1,000 -1.6% 5.57 US$100,000
2026-05-21 2026-04-10 B Purchase
Martins Marcelo Eduardo

Chief Executive Officer

Executive Director
1,000 +105.1%
7.05
US$100,000 		1,000 +105.1% 7.05 US$100,000
2024-04-04 2024-04-04 PrS Proposed sale
Palania Corp

Director

Non-Executive Director
150,000
12.40
US$1,860,000 		150,000 12.40 US$1,860,000
2024-04-03 2024-04-03 PrS Proposed sale
Palania Corp

Officer

Officer
200,000
12.21
US$2,441,860 		200,000 12.21 US$2,441,860
2024-04-02 2024-04-02 PrS Proposed sale
Palania Corp

Director

Non-Executive Director
256,723
12.29
US$3,155,725 		256,723 12.29 US$3,155,725
2024-04-01 2024-04-01 PrS Proposed sale
Palania Corp

Director

Non-Executive Director
38,241
12.45
US$475,981 		38,241 12.45 US$475,981
2023-07-05 2023-07-05 PrS Proposed sale
Palania Corp

Director

Non-Executive Director
200,000
15.32
US$3,064,000 		200,000 15.32 US$3,064,000
2023-04-27 2023-04-14 PrS Proposed sale
Burkhard Otto Cordes

Director

Non-Executive Director
9,500
12.68
US$120,427 		9,500 12.68 US$120,427
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