COMPANHIA DE SANEAMENTO BÁSICO DO ESTADO DE SÃO PAULO – SABESP - Form 6-K

COMPANHIA DE SANEAMENTO BÁSICO DO ESTADO DE SÃO PAULO - SABESP

Corporate Taxpayer's ID (CNPJ): 43.776.517/0001-80

Company Registry (NIRE): 35.3000/1683-1

NOTICE TO THE MARKET

Companhia de Saneamento Básico do Estado de São Paulo - SABESP ("Company" or "Sabesp"), pursuant to the provisions of article 33, item XXIX of CVM Resolution 80/22, hereby informs its shareholders and the market in general that, by resolution of the General Shareholders' Meeting held on April 28, 2023, the Company's Audit Committee is now composed as follows:

• Eduardo Person Pardini - Coordinator e Financial Expert

Mr. Pardini has been an independent member of our Board of Directors and Coordinator and Finance Specialist of our Audit Committee since May 2023. Mr. Pardini holds a bachelor's degree in Accounting from Faculdade de Ciências Econômicas de São Paulo, a postgraduate degree in Administration with an emphasis in Finance from Fundação Álvares Penteado, and several degrees in extension courses in Brazil and abroad, such as Business Strategy from Wharton Business School of the University of Pennsylvania, Corporate Management from Fundação Getúlio Vargas, Ethics and Corporate Governance from Milliken University, and Innovation from the Massachusetts Institute of Technology. He is currently a main partner at CrossOver Consulting & Auditing. He is also an Executive Officer of the Internal Control Institute Chapter Brazil, a member of the Audit Committee of Companhia de Saneamento de Santa Catarina, and a professor of the risk- based audit area in the MBA course at the Trevisan Business School. Mr. Pardini has more than 43 years of experience as an internal and external auditor, senior executive of Brazilian and multinational companies, professor and lecturer on audit, internal controls, risk management, and governance for government entities and entities in the private sector.

• Karolina Fonsêca Lima - Member

Mrs. Lima has been an independent member of our Board of Directors and a member of our Audit Committee since May 2023. Mrs. Lima holds a bachelor's degree in Accounting from the Federal University of Maranhão and in Law from University Ceuma. She is currently head of Concremat Engenharia e Tecnologia in São Luiz, Maranhão. She worked at Companhia Docas do Maranhão between 2002 and 2019, as head auditor, and member of the Audit Technical Committee, Eligibility Committee, and Correctional Technical Committee of the Ministry of Infrastructure.