Marcelo Eduardo Martins - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Marcelo Eduardo Martins has filed 1 SEC Form 4 filing across 1 company in the last 90 days - buying. Lifetime open-market purchases: $23.82M.
Profile
Marcelo Eduardo Martins is the Chief Executive Officer at Cosan S.A. (CSAN). Martins has reported 1 insider filing with the SEC since 2026. The most recent filing was in May 2026.
| Role | Chief Executive Officer, Director |
|---|---|
| Notability | 40/100 |
Board memberships
- Cosan S.A.
Reported roles
- Chief Executive Officer
Trading Pattern
InsiderAlpha's records for Marcelo Eduardo Martins go back to 2026: 1 primary Form 4 filing, an average of 1.0 per year. The typical open-market purchase is $11.91M (2 buys totaling $23.82M). The largest single buy on record is $12.55M of CSAN in 2026. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role Marcelo Eduardo Martins has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Chief Executive Officer, Director at Cosan S.A. (CSAN) - 1 filing, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-22 | CSAN | Cosan S.A. | J - Other acquisition / disposition | 2.44M | $5.14 | $12.55M |
| 2026-05-22 | CSAN | Cosan S.A. | J - Other acquisition / disposition | 1.55M | $7.05 | $10.94M |
| 2026-05-22 | CSAN | Cosan S.A. | P - Open-market purchase | 2.44M | $5.14 | $12.55M |
| 2026-05-22 | CSAN | Cosan S.A. | P - Open-market purchase | 1.60M | $7.05 | $11.27M |
Companies - Last 90 Days
- Cosan S.A. (CSAN) - 1 filing, last 2026-05-22
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Marcelo Eduardo Martins has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Maria Rita de Carvalho Drummond - $603K of CSAN open-market activity in the last 12 months
- Rubens Ometto Silveira Mello - $267K of CSAN open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Frank Martell
- Martin Product Sales LLC
- Neil Mehta
- Keith A. Meister
- MetLife Investment Management, LLC
- John Micek
- Andrew J. Mills
- Charles N. Mills
Frequently Asked Questions
Who is Marcelo Eduardo Martins?
Marcelo Eduardo Martins is the Chief Executive Officer at Cosan S.A. (CSAN). Martins has reported 1 insider filing with the SEC since 2026. The most recent filing was in May 2026.…
How many SEC Form 4 filings has Marcelo Eduardo Martins submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Marcelo Eduardo Martins been buying or selling stock?
Recorded transactions: 2 open-market purchases ($23.82M) and 0 open-market sales across all tracked filings.
Where can I see all of Marcelo Eduardo Martins's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live Marcelo Eduardo Martins profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.