Sabesp (SBS) sets April 28, 2026 vote on 1-for-5 stock split

Rhea-AI Filing Summary

Companhia de Saneamento Básico do Estado de São Paulo – Sabesp plans to submit a stock split proposal to shareholders. At an Extraordinary General Meeting scheduled for April 28, 2026, shareholders will vote on splitting all common shares at a 1:5 ratio, so each existing share becomes five shares.

The action will not change the total share capital or the proportional ownership of any shareholder. The new shares will carry the same rights as current common shares, including participation in dividends, interest on equity and other distributions.

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FAQ

What stock split is Sabesp (SBS) proposing in this 6-K?

Sabesp is proposing a stock split of all its common shares at a 1:5 ratio, meaning each existing share would be split into five. The company states this will not change total share capital or any shareholder’s proportional ownership.

When will Sabesp (SBS) shareholders vote on the stock split?

Shareholders are scheduled to vote on the stock split at an Extraordinary General Meeting on April 28, 2026. The proposal must be approved at this meeting before the split can be implemented, according to the company’s disclosure.

Will Sabesp’s proposed stock split change shareholder ownership percentages?

The proposed stock split will not change any shareholder’s proportional ownership in Sabesp. While each share will be split so that one becomes five, the company’s overall share capital and each investor’s relative stake remain the same after the split.

Do the new Sabesp shares from the split keep the same rights?

Yes. Sabesp states that the resulting shares will grant the same rights as currently outstanding common shares. This includes rights to dividends, interest on equity and any other distributions the company may decide to make in the future.

Is Sabesp’s share capital affected by the 1:5 stock split proposal?

Sabesp explains that the stock split will not change the total amount of the company’s share capital. Only the number of common shares will increase through the 1:5 split, while the economic value of the capital remains unchanged overall.

What regulatory framework does Sabesp cite for this stock split disclosure?

Sabesp cites Resolution No. 44 of August 23, 2021, issued by the Brazilian Securities and Exchange Commission (CVM). The company states that this material fact is being disclosed in compliance with that resolution’s requirements for market communication.

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

REPORT OF FOREIGN ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16 OF THE

SECURITIES EXCHANGE ACT OF 1934

For March, 2026

(Commission File No. 1-31317)

Companhia de Saneamento Básico do Estado de São Paulo - SABESP

(Exact name of registrant as specified in its charter)

Basic Sanitation Company of the State of Sao Paulo - SABESP

(Translation of Registrant's name into English)

Rua Costa Carvalho, 300
São Paulo, S.P., 05429-900
Federative Republic of Brazil

(Address of Registrant's principal executive offices)

Indicate by check mark whether the registrant files or will file
annual reports under cover Form 20-F or Form 40-F.

Form 20-F ___X___ Form 40-F ______

Indicate by check mark if the registrant is submitting the Form 6-K
in paper as permitted by Regulation S-T Rule 101(b)(1)__.

Indicate by check mark if the registrant is submitting the Form 6-K
in paper as permitted by Regulation S-T Rule 101(b)(7)__.

Indicate by check mark whether the registrant by furnishing the
information contained in this Form is also thereby furnishing the
information to the Commission pursuant to Rule 12g3-2(b) under
the Securities Exchange Act of 1934.

Yes ______ No ___X___

If "Yes" is marked, indicated below the file number assigned to the
registrant in connection with Rule 12g3-2(b):

 

COMPANHIA DE SANEAMENTO BÁSICO DO ESTADO DE SÃO PAULO – SABESP

PUBLICLY HELD COMPANY

NIRE 35.300.016.831

CNPJ nº 43.776.517/0001-80

MATERIAL FACT

Companhia de Saneamento Básico do Estado de São Paulo S.A. (“Sabesp” or “Company”) in compliance with the terms set forth in Resolution No. 44, of August 23, 2021, as amended, of the Brazilian Securities and Exchange Commission (“CVM”), hereby informs its shareholders and the market in general that, as of this date, the Company has approved the submission to the shareholders, at an Extraordinary General Meeting to be held on April 28, 2026, of a proposal for the stock split of all common shares issued by the Company, at a ratio of 1:5, so that each 1 (one) common share will represent 5 (five) common shares, with no change to the amount of the Company’s share capital (“Stock Split”).

The Stock Split will not result in any change in the proportional ownership interest of the shareholders in the Company’s share capital. The resulting shares will grant their holders the same rights attributed to the currently outstanding common shares, including with respect to the distribution of dividends and/or interests on equity and other distributions that may be made by the Company.

The Company will keep its shareholders and the market duly informed of the developments of this matter, in accordance with applicable regulations.

São Paulo, March 27, 2026

DANIEL SZLAK

Chief Financial Officer and Investors Relations Office

SIGNATURE 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, in the city São Paulo, Brazil.

Date: March 30, 2026

Companhia de Saneamento Básico do Estado de São Paulo - SABESP
By:	/s/  Daniel Szlak
	Name: Daniel Szlak Title: Chief Financial Officer and Investor Relations Officer

FORWARD-LOOKING STATEMENTS

This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates of future economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, trends or results will actually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations.