Marcelo Eduardo Martins - 10 Aug 2026 Form 4 Insider Report for Cosan S.A. (CSAN)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: CSAN
Reported as of: 10 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 12 Aug 2026, 16:47:54 UTC
Prior SEC filing: 21 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Marcelo Eduardo Martins

Key filing fact

Marcelo Eduardo Martins filed Form 4 for Cosan S.A. (CSAN) on 12 Aug 2026.

Key facts

This page summarizes Marcelo Eduardo Martins's Form 4 filing for Cosan S.A. (CSAN).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 12 Aug 2026, 16:47.

Change

Previous filing in this sequence was filed on 21 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001983639 Primary reporting owner

Martins Marcelo Eduardo

Relationship: Chief Executive Officer, Director
Address: AV. BRIGADEIRO FARIA LIMA, 4,100 16TH FLOOR, SAO PAULO, BRAZIL
Signature: /s/ Marcelo Eduardo Martins
Signature date: 12 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CSAN transaction

COMMON STOCK (BVMF: CSAN3)

Other

Transaction value
Shares: +276,475
Change %: +5.7%
Price: $3.99^*
Shares after: 5,090,732
Date: 10 Aug 2026
Ownership: Direct
Footnotes: F1

CSAN transaction

LONG TERM INCENTIVE (BVMF: CSAN3)

Other

Transaction value
Shares: -276,475
Change %: -12%
Price: $3.99^*
Shares after: 2,074,530
Date: 10 Aug 2026
Ownership: Direct
Footnotes: F1, F2

CSAN holding

ADS CSAN

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,613,666
Date: 10 Aug 2026
Ownership: Direct
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Brazilian reais.

Footnote F2

Right to receive shares resulting from Long-Term Incentive Programs - The Program designates eligible individuals of the Cosan Group who are granted shares, subject to continued service with the Group for a specified period (vesting), and which may also be linked to the achievement of certain performance targets. As of this date, the amount reported represents the number of shares granted to the reporting person. Such amount may increase or decrease as of the actual delivery date, depending on the level of achievement of the applicable targets and the applicable tax effects. All amounts are shown in gross terms.

Footnote F3

Each American Depositary Shares represents four shares of Common Stock.