Welcome to our dedicated page for Companhia De Saneamento Basico SEC filings (Ticker: SBS), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
This page provides access to Sabesp’s (Companhia de Saneamento Básico do Estado de São Paulo – SABESP, NYSE: SBS) U.S. regulatory filings, primarily Form 20‑F annual reports and Form 6‑K current reports filed as a foreign private issuer. These documents contain detailed information on the company’s basic and environmental sanitation activities in the State of São Paulo, its financial position and performance, and key regulatory and contractual developments.
Through its 6‑K filings, Sabesp furnishes earnings materials that include consolidated financial statements, notes, and management commentary. Investors can review data on revenue from sanitation services and construction, operating costs and expenses, adjusted EBITDA, net income, earnings per share, cash flows, capital structure, and investment levels in water supply, sewage collection and sewage treatment projects. Quarterly information (ITR) filed with the Brazilian regulator and furnished to the SEC provides granular balance sheet and income statement details, including borrowings and financings, PPP obligations, provisions, profit reserves and equity movements.
The company also uses 6‑K material facts to disclose regulatory and tariff decisions, such as ARSESP resolutions authorizing average rate adjustments, equilibrium rate calculations, and validation of the regulatory asset base. Other filings describe capital markets transactions, including the approval of multiple debenture issuances, their main characteristics and intended uses, as well as Board decisions on interest on equity payments and capital increases via capitalization of profit reserves.
Additional 6‑Ks cover strategic transactions and contracts, such as the planned acquisition of a controlling stake in EMAE – Empresa Metropolitana de Águas e Energia S.A. and a turnkey NB‑IoT smart metering contract with Telefônica group entities. On Stock Titan, these filings are complemented by AI‑powered summaries that highlight the main points of lengthy financial tables, regulatory notes and transaction descriptions, helping users quickly understand how each filing relates to Sabesp’s sanitation services business, tariffs, investments and capital structure.
Companhia de Saneamento Básico do Estado de São Paulo – Sabesp approved its 38th issuance of simple, non-convertible, unsecured debentures, in up to five series, for public distribution to professional investors, totaling R$ 6,292,086,000.00 on the issue date. The debentures will be offered under Brazil’s automatic registration procedure, pursuant to CVM Resolution No. 160, and are restricted to professional investors under Resolution No. 30. The distribution will be conducted by financial institutions in the securities distribution system under a firm-commitment underwriting regime, meaning underwriters commit to place the full offering.
Companhia de Saneamento Básico do Estado de São Paulo – Sabesp reports that in 2025 it invested a preliminary, unaudited total of R$ 15.2 billion in water supply and sewage infrastructure. This amount is 2.2 times higher than the R$ 6,9 billion invested in 2024, with spending accelerating in the second half of 2025 and rising 36% compared to the first half of 2025.
The company states that these higher investments support its goal of achieving universal access to basic sanitation by 2029 for the population in the URAE-1 contract concession area.
Companhia de Saneamento Básico do Estado de São Paulo – Sabesp has filed for registration of a public tender offer to buy up to 3,695,800 common shares of EMAE – Empresa Metropolitana de Águas e Energia S.A.. These shares represent 10.0% of EMAE’s total capital and 25.13% of its voting capital, excluding shares already held by Sabesp or in treasury.
The tender offer price is R$49.46 per share, equal to 80% of the R$61.83 per-share amount Sabesp paid in the direct sale of EMAE’s control, in which it acquired 11,009,550 common shares and 29,950 preferred shares for a total of R$682,643,113.65. The tender price will be updated by the SELIC rate from January 21, 2026 until settlement. Sabesp states it will keep shareholders informed about relevant developments.
Companhia de Saneamento Básico do Estado de São Paulo – Sabesp announced it has signed a Share Purchase Agreement with Iguá Saneamento S.A. to acquire common shares representing 90% of Saneamento de Mirassol – Sanessol S.A.
Sanessol holds the concession to operate public water supply and sewage services in the city of Mirassol, São Paulo, serving approximately 65,000 people. Completion of the transaction is subject to customary conditions, including approval by Brazil’s antitrust authority CADE. Sabesp describes this step as advancing its strategic plan and strengthening its presence in Brazil’s water and sanitation sector.
Companhia de Saneamento Básico do Estado de São Paulo – Sabesp agreed a long-term loan of
The B Loan will back the issuance of blue senior secured notes in two tranches:
Sabesp plans to use the proceeds to support projects aimed at universalizing basic sanitation services in the State of São Paulo, including building and upgrading sewage treatment facilities and expanding collection systems, aligning the financing with environmental and infrastructure goals.
Companhia de Saneamento Básico do Estado de São Paulo – Sabesp completed the acquisition of 11,009,550 common shares of EMAE, representing approximately 74.9% of EMAE’s voting capital and about 29.79% of its total capital. The shares were acquired from Vórtx, acting as trustee for debentureholders of Phoenix Água e Energia S.A., at a price of R$62.00 per share, for a total cash payment of R$682,643,113.65, with no post-closing price adjustment.
Following this change of control, Sabesp will, within 30 days, apply for registration of a mandatory public tender offer to acquire EMAE’s remaining common shares, as required by Brazilian corporate law. Sabesp also states that it does not intend to cancel EMAE’s publicly-held company registration within one year and has made no decision on any potential corporate reorganization involving the two companies.
Companhia de Saneamento Básico do Estado de São Paulo – SABESP filed an update about its previously announced transaction involving Empresa Metropolitana de Águas e Energia S.A. (EMAE). The company explains that the effective completion of the transfer of corporate control of EMAE to SABESP still depends on additional formalities under the purchase and sale agreements signed with Vórtx Distribuidora de Títulos e Valores Mobiliários Ltda. and Axia Energia.
These contractual steps are described as being in the implementation phase, meaning the transaction has not yet been fully closed. SABESP states that it will keep shareholders and the market informed of any relevant developments related to this transaction.
Companhia de Saneamento Básico do Estado de São Paulo – Sabesp filed a Form 6-K reporting a material fact to investors. The company states that its Board of Directors, at a meeting held on December 18, 2025, unanimously approved resolutions without any restrictions or reservations.
Sabesp explains that additional information about these board resolutions is available in the minutes of the December 18, 2025 meeting and in related shareholder and market notices, which can be accessed at its headquarters, on its investor relations website, and on the B3 and Brazilian Securities Commission websites.
Sabesp is detailing a regulator-approved adjustment to its water and sewage tariffs. The company reports a 10.6% increase in the equilibrium rate, which is the technical rate level used in the regulatory framework. This change reflects factors such as recognition of the regulatory asset base, operating expenses, non-manageable costs, compensatory adjustments from the prior regulatory cycle, and other financial items.
After incorporating market effects, inflation measured by IPCA between July 2024 and October 2025, and tax items related to PIS/COFINS, Sabesp calculates that the average tariff applied to users will rise by 6.5%. The company links part of the improvement in operating items to a higher number of connections and volumes, driven by anticipated universalization of services, while also noting the end of rate coverage for the Alto Tietê PPP as a negative factor. These changes define the new price levels customers will pay going forward.
Companhia de Saneamento Básico do Estado de São Paulo – Sabesp reports that regulator ARSESP has approved a tariff adjustment for its water and sewage services. The resolution authorizes an average increase of 6.5% on the current rates charged to users, effective from January 1, 2026. According to Sabesp’s preliminary review, this corresponds to a 10.6% increase in its equilibrium rate, which is a benchmark level designed to balance revenues with operating and investment needs.
The company plans to provide further clarification on the main items behind this adjustment and has noted that ARSESP also published a technical note and an Excel model detailing the calculation. Sabesp states it will keep shareholders and the market informed about any additional developments related to this rate change.