SABESP director files initial Form 3

COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP director Freire Amado Tinn has filed an initial Form 3 reporting insider status for the company’s shares.

Accepted by SEC EDGAR 03/19/2026 - 06:38 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP director Freire Amado Tinn has filed an initial Form 3 reporting insider status for the company’s shares. The excerpt shows no reported transactions, derivative positions, or holding entries associated with this reporting person.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the SABESP (SBS) Form 3 filing for Freire Amado Tinn show?

The Form 3 filing identifies Freire Amado Tinn as a director of SABESP. The excerpted data shows no reported transactions, derivative positions, or holding entries, indicating only an initial disclosure of insider status without trading activity in this filing.

Are there any buy or sell transactions in the SABESP (SBS) Form 3?

No transactions are reported. The transaction summary lists zero buys, zero sells, zero derivative exercises, and zero other transaction types, indicating the filing serves only to establish insider reporting status rather than to disclose trading activity.

Does the SABESP (SBS) Form 3 show any derivative securities for the director?

The filing excerpt shows no derivative positions. The derivative summary is empty and derivativeTransactionCount is zero, which means no options, warrants, or other derivative securities are reported for this director in this particular Form 3 disclosure.

What is the role of Freire Amado Tinn at SABESP (SBS) according to the Form 3?

Freire Amado Tinn is reported as a director of SABESP. The officer fields are not marked, and the ten percent owner field is not checked, so the filing classifies this individual solely as a board-level insider for reporting purposes.

Does the SABESP (SBS) Form 3 include any tax withholding or restructuring events?

No such events appear in the excerpt. Tax withholding count and shares are zero, and restructuring count and shares are also zero, indicating there are no compensation-related tax withholdings or entity restructuring transfers reported in this Form 3 data.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Understanding Insider Trading Forms →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

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
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Freire Amado Tinn

(Last) (First) (Middle)

300 COSTA CARVALHO STREET

(Street)

SAO PAULO 05429-900

(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
COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP [ SBSP3 ]

3a. Foreign Trading Symbol

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:

Due to the issuer's status as a foreign private issuer pursuant to Rule 3a12-3(b) under the Securities Exchange Act of 1934 (the "Act"), the reporting person's transactions in the issuer's equity securities are exempt from Sections 16(b) and 16(c) of the Act. Exhibit 24 - Power of Attorney.

No securities are beneficially owned.

	/s/ Beatriz Caroline de Sousa Daher, as attorney-in-fact for Tinn Freire Amado	03/18/2026
	** 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)