Cosan S.A. (CSAN) director Esteves Andre Santos files initial Form 3

Rhea-AI Filing Summary

Cosan S.A. director Esteves Andre Santos filed an initial ownership report on Form 3. This filing identifies him as a director of Cosan S.A. and establishes his status as a reporting person for future insider ownership and transaction disclosures.

Key Terms

Form 3, reporting person, ten percent owner

3 terms

Form 3 regulatory

"INSIDER FILING DATA (Form 3)"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

reporting person regulatory

""reportingPersons": [ { "name": "Esteves Andre Santos""

ten percent owner regulatory

""is_ten_percent_owner": 0"

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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

OMB APPROVAL

OMB Number:			3235-0104
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hours per response:			0.5

1. Name and Address of Reporting Person^*

Esteves Andre Santos

(Last) (First) (Middle)

AVENIDA BRIGADEIRO FARIA LIMA, 3477

14 FLOOR, ITAIM BIBI

(Street)

SAO PAULO SAO PAULO 04538-133

(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:

Remarks:

The director does not, directly or indirectly, hold any security of Cosan S.A.

No securities are beneficially owned.

	/s/ Andre Santos Esteves	04/13/2026
	** 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 does Cosan S.A. (CSAN) Form 3 for Esteves Andre Santos show?

The Form 3 shows that Esteves Andre Santos is a director and reporting person of Cosan S.A.. It serves as his initial insider ownership filing, forming the baseline for future Form 4 or Form 5 transaction reports.

Is Esteves Andre Santos a ten percent owner of Cosan S.A. (CSAN)?

Based on this Form 3, Esteves Andre Santos is identified as a director but not as a ten percent owner of Cosan S.A.. The ten percent owner indicator is not marked for him in the filing data.

Does the Cosan S.A. (CSAN) Form 3 report any insider transactions?

This Form 3 does not list any insider transactions for Esteves Andre Santos. It functions as an initial ownership and status report rather than a record of purchases, sales, or other movements in Cosan S.A. securities.

What is the role of the reporting person in Cosan S.A. (CSAN) Form 3?

The reporting person, Esteves Andre Santos, is identified as a director of Cosan S.A.. This role makes him subject to ongoing insider reporting obligations regarding his holdings and future transactions in the company’s securities.

Why is a Form 3 important for Cosan S.A. (CSAN) insiders?

Form 3 establishes an insider’s initial disclosure of their status and holdings in Cosan S.A.. It provides a starting point against which later Forms 4 and 5 can be compared to track changes in insider ownership over time.