SABESP officer reports RSU holdings in Form 3

COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP Corporate Services Officer Gustavo do Valle Fehlberg filed an initial ownership report showing holdings of restricted stock units (RSUs).

Rhea-AI Filing Summary

COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP Corporate Services Officer Gustavo do Valle Fehlberg filed an initial ownership report showing holdings of restricted stock units (RSUs). One RSU award covers 5,856 underlying common shares and another covers 5,672 underlying common shares.

Each RSU represents the contingent right to receive one common share. The 5,856-unit grant was awarded on April 29, 2025 and is scheduled to vest in equal parts on May 1 of 2026, 2027, 2028 and 2029, subject to continued service. The 5,672-unit grant was awarded on December 19, 2025 and is scheduled to vest in equal parts on January 1 of 2027, 2028, 2029 and 2030, also subject to continued service.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Do Valle Fehlberg Gustavo

Role Corporate Services Officer

Type	Security	Shares	Price	Value
holding	Restricted Stock Units	--	--	--
holding	Restricted Stock Units	--	--	--

Holdings After Transaction: Restricted Stock Units — 11,528 contracts (Direct)

Footnotes (3)

1. F1. Each restricted stock unit ("RSU") represents the contingent right to receive one Common Share.
2. F2. Represents RSUs granted on April 29, 2025, which will vest pro rata on each of May 1, 2026, May 1, 2027, May 1, 2028 and May 1, 2029, subject to continued service as an officer of the issuer.
3. F3. Represents RSUs granted on December 19, 2025, which will vest pro rata on each of January 1, 2027, January 1, 2028, January 1, 2029 and January 1, 2030, subject to continued service as an officer of the issuer.

FAQ

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

What insider position is reported for SABESP (SBS) in this Form 3?

The filing reports Corporate Services Officer Gustavo do Valle Fehlberg’s initial ownership of restricted stock units, representing rights to receive SABESP common shares, rather than any new share purchases or sales in the market.

How many SABESP RSUs does the officer report holding in this Form 3?

The officer reports two restricted stock unit awards: one linked to 5,856 common shares and a second linked to 5,672 common shares. Each RSU represents a contingent right to receive one SABESP common share upon vesting.

When do the April 29, 2025 SABESP RSU grants begin and finish vesting?

The April 29, 2025 SABESP RSU grant vests in four equal installments on May 1 of 2026, 2027, 2028 and 2029. Vesting depends on the officer’s continued service with the company through each vesting date.

What is the vesting schedule for the December 19, 2025 SABESP RSUs?

The December 19, 2025 SABESP RSU grant also vests in four equal annual installments, on January 1 of 2027, 2028, 2029 and 2030. Each installment requires the officer to remain in service through the applicable vesting date.

Do the SABESP RSUs reported in this Form 3 involve any exercise price?

The RSUs have an exercise price listed as 0.0000, meaning there is no cash exercise price. Instead, each vested RSU entitles the holder to receive one SABESP common share, subject to the vesting conditions being satisfied over time.

Does this SABESP Form 3 indicate insider buying or selling activity?

No, the Form 3 reflects existing restricted stock unit holdings and vesting terms, not market trades. The transactions are classified as holdings with unknown direction, and there are no recorded open-market purchases or sales in this dataset.

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

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Accepted by SEC EDGAR 03/19/2026 - 06:24 AM Learn about SEC filing dates

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^*

Do Valle Fehlberg Gustavo

(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)

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

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
Restricted Stock Units	(2)	(2)	Common Shares	5,856	(1)	D
Restricted Stock Units	(3)	(3)	Common Shares	5,672	(1)	D

Explanation of Responses:

1. Each restricted stock unit ("RSU") represents the contingent right to receive one Common Share.

2. Represents RSUs granted on April 29, 2025, which will vest pro rata on each of May 1, 2026, May 1, 2027, May 1, 2028 and May 1, 2029, subject to continued service as an officer of the issuer.

3. Represents RSUs granted on December 19, 2025, which will vest pro rata on each of January 1, 2027, January 1, 2028, January 1, 2029 and January 1, 2030, subject to continued service as an officer of the issuer.

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.

	/s/ Beatriz Caroline de Sousa Daher, as attorney-in-fact for Gustavo do Valle Fehlberg	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)