Cosan (CSAN) director Mazzola files initial insider Form 3 disclosure

Rhea-AI Filing Summary

Cosan S.A. filed an initial insider ownership report for director Renato Antonio Secondo Mazzola. This Form 3 establishes his status as a reporting person but, based on the provided data, does not list any transactions or share holdings at this time.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

MAZZOLA RENATO ANTONIO SECONDO

(Last) (First) (Middle)

AV BRIGADEIRO FARIA LIMA, 3477

ITAIM BIBI

(Street)

SAO PAULO SP 04538133

(City) (State) (Zip)

BRAZIL

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
Cosan S.A. [ CSAN ]

3a. Foreign Trading Symbol
[CSAN3]

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

No securities are beneficially owned.

	/s/ Renato Antonio Secondo Mazzola	03/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What did Cosan (CSAN) disclose in this Form 3 filing?

Cosan filed an initial insider ownership report identifying Renato Antonio Secondo Mazzola as a director. The Form 3 establishes him as a reporting person but, in the provided data, shows no specific transactions or holdings recorded yet.

Who is the reporting person in Cosan (CSAN)'s latest Form 3?

The reporting person is Renato Antonio Secondo Mazzola, identified as a director of Cosan S.A. This filing formally registers him as an insider subject to ongoing ownership reporting requirements under U.S. securities rules for the company’s securities.

Does this Cosan (CSAN) Form 3 show any insider share purchases or sales?

No, the summarized Form 3 data shows zero buy, sell, acquire, or dispose transactions. It is an initial ownership report, serving mainly to identify the director as an insider rather than to record trading activity.

Are any derivative securities reported for the Cosan (CSAN) director on this Form 3?

The derivative section in the summarized data is empty, and exercise-related counts are zero. This indicates no derivative securities, such as options or warrants, are reported for the director in this particular Form 3 snapshot.

What does the transaction summary indicate in Cosan (CSAN)'s Form 3?

The transaction summary shows zero counts across buys, sells, exercises, gifts, and restructurings, with net buy-sell direction marked neutral. This confirms the filing functions as an initial registration, not a report of trading activity.