COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP

We have adopted a compliance program which includes a Code of Conduct and Integrity, that applies to all of our employees, regardless of their position, as well as our suppliers and third-party contractors. The program was established in accordance with the Anticorruption Law, the Foreign Corrupt Practices Act, theNovo MercadoListing Regulation and the guidelines of the Brazilian Office of the Comptroller General (“CGU”). Our Code of Conduct and Integrity is available on our web site athttps://api.mziq.com/mzfilemanager/v2/d/9e47ee51-f833-4a23-af98-2bac9e54e0b3/d63d929f-4029-6ae7-bc17-2bf264c907fc?origin=2.

In addition, we have an external whistleblowing hotline, which can receive anonymous whistle blowing, to report cases of fraud, bribery, corruption, unlawful acts, breaches of the Code of Conduct and Integrity and other issues that could harm our interests and principles.

We periodically review our handling of anti-fraud, anti-bribery and anti-corruption measures. As part of the Compliance Program, we created the Conduct and Integrity Learning Track which consists of a continuous training program aimed at our entire staff about ethics and compliance issues.

When entering into business and professional relationships with higher risks, we carry out background checks in order to detect information relating to history and reputation, relationships with public agencies or agents, company corporate structure and restrictive lists, including corruption proceedings and investigations, to ensure that the terms and conditions of the transaction do not result in a material risk of violation of applicable anti-corruption laws or a reputational exposure, in order to assist the decision making and risk management of those responsible for the transactions.

As a result of our efforts, we did not register any corruption cases in 2025.