Business Context and Reporting Period
Company: Companhia de Saneamento Básico do Estado de São Paulo - SABESP
Filing Type: Form 6-K (Report of Foreign Issuer)
Reporting Period: Year ended December 31, 2025
Audit Status: Audited by Ernst & Young Auditores Independentes S/S Ltda. (Unmodified Opinion)
Context: 2025 marked the first full fiscal cycle following SABESP's privatization (completed July 2024). The company focused on universalization targets, operational efficiency, and financial restructuring under the new URAE-1 concession agreement.
Key Financial Metrics
| Metric (R$ Million) | 2025 | 2024 | Variance |
|---|---|---|---|
| Net Operating Revenue | 38,092 | 36,145 | +5.4% |
| Net Income | 8,462 | 9,580 | -11.7% |
| Adjusted Net Income* | 6,300 | 5,170 | +21.9% |
| EBITDA (Adjusted)** | 12,600 | 15,510 | -18.8% |
| Capital Expenditures (Capex) | 15,202 | 6,911 | +120.0% |
| Net Debt | 27,771 | 19,876 | +39.7% |
| Net Debt / Adjusted EBITDA | 2.2x | 1.3x | +0.9x |
| Equity | 42,401 | 36,928 | +14.8% |
| Operating Cash Flow | 8,361 | 7,405 | +12.9% |
*Adjusted for the R$ 5.5 billion one-time gain from financial asset bifurcation recognized in 2024.
**Calculated as Profit from operations before financial income/expenses + Depreciation & Amortization.
Material Changes vs. Prior Period
- Revenue Growth: Net revenue increased 4% to R$ 37.6 billion (Management Report) / R$ 38.1 billion (Consolidated Statements). Sanitation service revenue grew 2.2% driven by a 3.7% net price increase (removal of discounts) and 2.4% volume growth, partially offset by a mix shift toward subsidized customers.
- Profitability Impact: Reported Net Income declined 12% primarily due to the absence of the R$ 5.5 billion non-recurring gain from the financial asset bifurcation recorded in 2024. Adjusted for this item, underlying profitability increased 22% year-over-year.
- Investment Surge: Capex more than doubled to R$ 15.2 billion, surpassing all U-Factor targets for the 2024-2025 cycle. Investments included 152% of Water Units target and 133% of Sewage Units target.
- Cost Efficiency: Administrative costs and expenses improved 13.8% due to a 13% workforce reduction (to 9,204 employees), process standardization, and a 54.5% drop in general expenses related to municipal fund transfers.
- Debt Profile: Gross debt increased to R$ 40.1 billion to finance universalization investments. However, the cost of debt was reduced to CDI - 0.20%, and average maturity extended to 5.6 years.
Guidance, Outlook, and Risks
- Universalization Targets: The company estimates approximately R$ 70 billion in total investments by 2029 to achieve universalization across 371 municipalities. 2025 saw access to treated water for 1.8 million people and sewage collection for 2.1 million.
- Strategic Acquisitions: Post-period events include the acquisition of a controlling stake in EMAE (Empresa Metropolitana de Águas e Energia) to increase water storage capacity by 52% and the acquisition of Sanessol (Mirassol).
- Shareholder Returns: The Board approved Interest on Equity (IoE) of R$ 1.8 billion (R$ 2.64 per share) payable in April 2026. A share buyback program was authorized for up to 1% of capital.
- Key Risks & Contingencies:
- Legal Provisions: Total provisions for lawsuits (labor, environmental, tax) stand at R$ 1.9 billion, with contingent liabilities totaling R$ 9.9 billion.
- Regulatory: Revenue recognition is impacted by the FAUSP (Support Fund for Sanitation Universalization) mechanism, which requires transfers to escrow accounts when application tariffs exceed balancing tariffs.
- Financial Asset Bifurcation: Significant judgment is required regarding the valuation of the financial asset related to concession indemnity, which is restated annually based on IPCA.
- EMAE Integration: The EMAE acquisition faces delays in financial statement disclosure due to internal investigations into related-party transactions and investments in Banco Master securities.
Investor Verification Checklist
- Adjusted Earnings: Verify the R$ 6.3 billion adjusted net income figure to understand organic performance excluding the 2024 one-time gain.
- FAUSP Impact: Review Note 30 for the specific impact of the FAUSP escrow mechanism on net revenue and cash flow, as this reduces reported revenue when tariffs are higher than the regulatory balancing tariff.
- Debt Covenants: Confirm compliance with leverage covenants (Net Debt/Adjusted EBITDA < 3.50x) given the significant increase in gross debt to fund Capex.
- EMAE Due Diligence: Monitor the outcome of the internal investigations at EMAE, as this affects the final purchase price accounting and potential contingent liabilities.
- Construction Revenue: Scrutinize the R$ 14.4 billion in construction revenue recognized under the service concession model, as this is a key audit matter involving significant estimates.