Sabesp share-capital increase not yet effective

The share-capital increase remains subject to completion of certain corporate events before the amended bylaws take effect.

Rhea-AI Filing Summary

SABESP clarified that its shareholder-approved amended bylaws, including a corresponding share-capital increase, have not yet taken effect. Shareholders approved the amendments on July 30, 2026; they will become effective when certain corporate events are completed. SABESP intends to update investors promptly after those events.

Key Terms

Amended Bylaws, share capital, Form 20-F

3 terms

Amended Bylaws technical

"a copy of the Company’s amended bylaws"

share capital financial

"an increase in its share capital"

Share capital is the total amount of money a company raises by selling pieces of itself, called shares, to investors. It’s like a company’s savings from many owners, which helps fund its growth and operations. This money matters because it shows how much the company has raised from shareholders and how it’s financed its business.

Form 20-F regulatory

"annual reports under cover Form 20-F or Form 40-F"

Form 20-F is the standardized annual disclosure that non-U.S. companies must file with the U.S. securities regulator when their shares are traded in the U.S.; it contains audited financial statements, a plain-language description of the business, management discussion, governance details and key risk factors. It matters to investors because it provides a consistent, comparable company “report card” and rulebook, helping buyers assess financial health, governance and risks before investing.

FAQ

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

What is the status of the SABESP (SBS) share-capital increase?

Shareholders approved the amended bylaws, including the corresponding share-capital increase, on July 30, 2026, but the amendments have not yet taken effect. They will become effective when certain corporate events are completed.

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

Form 6-K: How Foreign Companies Report to the SEC →

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

Add on Google Not now

Available on EDGAR 10/02/2026 - 05:07 PM Accepted by SEC EDGAR 10/02/2026 - 05:06 PM Learn about SEC filing dates

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549 

AMENDMENT NO. 1 TO

FORM 6-K

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

SECURITIES EXCHANGE ACT OF 1934

For the month of September, 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 ______

This Amendment No. 1 to Report on Form 6-K (this “Report”) amends the Report on Form 6-K furnished by Companhia de Saneamento Básico do Estado de São Paulo - SABESP (the “Company”) on September 23, 2026 (the “Original 6-K”), which attached a copy of the Company’s amended bylaws (estatuto social) reflecting an increase in its share capital (the “Amended Bylaws”).

The Company is furnishing this Report solely to clarify that the Amended Bylaws, including the corresponding increase in share capital reflected therein, have been approved by the Company’s shareholders, on July 30, 2026, but have not yet taken effect. The Amended Bylaws, in the form filed with the Original 6-K, will become effective at a later date when certain corporate events are completed, following which the Company intends to update investors promptly. Except as set forth in this Report, the disclosure contained in the Original 6-K remains unchanged.

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.

Date: October 02, 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