Sabesp CFO sells 7,381 common shares

COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP Chief Financial Officer Daniel Szlak reported selling a total of 7,381 Common Shares of the company in open-market transactions at a price of $28.30 per share.

Rhea-AI Filing Summary

COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP Chief Financial Officer Daniel Szlak reported selling a total of 7,381 Common Shares of the company in open-market transactions at a price of $28.30 per share.

Two separate sales on June 15, 2026 covered 81 shares and 7,300 shares. After these transactions, Szlak’s directly held Common Shares reported in this filing decreased to zero, indicating he no longer shows a direct share position in this Form 4.

Insights

Equity compensation and governance analyst

Sabesp’s CFO sold 7,381 shares, leaving no direct holdings in this filing.

The Form 4 shows Chief Financial Officer Daniel Szlak executed open-market sales totaling 7,381 Common Shares at $28.30 per share on June 15, 2026. Both transactions are classified as non-derivative, meaning they involved existing common equity rather than options or other derivatives.

After the sales, the reported direct ownership of Common Shares is zero, and there are no remaining derivative positions disclosed in this filing. The absolute share count is modest in market terms; the main point of note is that the CFO’s directly reported position is now fully sold in this specific account.

Insider Trade Summary

Net Seller: 7,381 shares

Net Sell 2 txns

Insider Szlak Daniel

Role Chief Financial Officer

Sold 7,381 shs ($209K)

Type	Security	Shares	Price	Value
Sale	Common Shares	7,300	$28.30	$207K
Sale	Common Shares	81	$28.30	$2K

Holdings After Transaction: Common Shares — 0 shares (Direct)

Key Figures

Total shares sold: 7,381 shares Sale price per share: $28.30 per share First transaction size: 81 shares +3 more

6 metrics

Total shares sold 7,381 shares Non-derivative Common Shares sold by CFO on June 15, 2026

Sale price per share $28.30 per share Price for both Common Share sale transactions

First transaction size 81 shares Common Shares sold in smaller open-market lot

Second transaction size 7,300 shares Common Shares sold in larger open-market lot

Direct holdings after sale 0 shares Total directly owned Common Shares following transactions

Net buy/sell shares -7,381 shares Net-sell direction from transaction summary

Key Terms

Common Shares, open-market sale, non-derivative, total_shares_following_transaction, +1 more

5 terms

Common Shares financial

"The Form 4 reports transactions in Common Shares as non-derivative securities."

Common shares are the basic units of ownership in a company that give holders a claim on profits and a right to vote on key matters, like electing the board. Think of them as membership cards in a club: they let you share in successes and losses, but in a bankruptcy or liquidation they are paid after creditors and preferred shareholders, so their value can swing more and matters for assessing risk and potential return.

open-market sale financial

"Each entry is described as an open-market sale of Common Shares."

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

non-derivative financial

"The transactions are classified as non-derivative, involving existing Common Shares."

total_shares_following_transaction financial

"Each sale lists total_shares_following_transaction as 0.0000."

transaction code "S" financial

"The filing uses transaction code "S" for the Common Share sales."

FAQ

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

What did Sabesp (SBS) CFO Daniel Szlak report in this Form 4?

Sabesp CFO Daniel Szlak reported selling a total of 7,381 Common Shares in open-market transactions. The sales occurred on June 15, 2026 at a reported price of $28.30 per share, reducing his directly reported Common Share holdings to zero.

How many Sabesp (SBS) shares did the CFO sell and at what price?

The CFO sold 7,381 Common Shares of Sabesp at $28.30 per share. The filing shows two non-derivative open-market sales: one for 81 shares and another for 7,300 shares, all executed on June 15, 2026.

What is the CFO’s reported Sabesp (SBS) shareholding after these transactions?

After the reported sales, the Form 4 lists the CFO’s directly held Common Shares as zero. Both transactions show a total_shares_following_transaction value of 0.0000, indicating no remaining directly reported Common Share position in this filing.

Were any Sabesp (SBS) derivative securities involved in the CFO’s Form 4?

No derivative securities are shown in this Form 4. The transactions are labeled as non-derivative involving Common Shares, and the derivativeSummary section is empty, indicating no remaining options or similar instruments reported here.

What type of transactions did the Sabesp (SBS) CFO use to sell the shares?

The filing characterizes both transactions as open-market sales of Common Shares. The transaction code is “S,” with the description “Sale in open market or private transaction,” and each entry is classified as non-derivative common stock.

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

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Accepted by SEC EDGAR 06/16/2026 - 04:19 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Szlak Daniel

(Last) (First) (Middle)

300 COSTA CARVALHO STREET

(Street)

SAO PAULO 05429-900

(City) (State) (Zip)

BRAZIL

(Country)

2. Issuer Name and Ticker or Trading Symbol
COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP [ SBS ]

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

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

2a. Foreign Trading Symbol
[SBSP3]

3. Date of Earliest Transaction (Month/Day/Year)
06/15/2026

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Shares	06/15/2026		S		7,300	D	$28.3	0	D
Common Shares	06/15/2026		S		81	D	$28.3	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Beatriz Caroline de Sousa Daher, as attorney-in-fact for Roberval Tavares de Souza	06/16/2026
	** 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 4 (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 4: SEC 1474 (03-26)