Indicate by check mark whether the registrant by furnishing the
information contained in this Form is also thereby furnishing the
information to the Commission pursuant to Rule 12g3-2(b) under
the Securities Exchange Act of 1934.

Yes ______ No ___X___

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

EXCERPT OF THE MINUTES OF THE 1021st BOARD OF DIRECTORS’ MEETING

On September 24, 2024, at 2:00 p.m., the undersigned members of the Company’s Board of Directors listed below met at the call of the Chair of the Board of Directors, Karla Bertocco Trindade, on an ordinary basis, according to the main section and paragraph 5 of Article 15 of the Bylaws of Companhia de Saneamento Básico do Estado de São Paulo – SABESP (“Company”), located at Rua Costa Carvalho, no. 300, Pinheiros, in the City and State of São Paulo, to resolve on the agenda below. The absence of the Board member Antonio Julio Castiglioni Neto was justified. The remote participation of Board members Anderson Marcio de Oliveira and Karolina Fonsêca Lima was recorded, as well as the attendance of the Sustainability and Corporate Governance Superintendent, Virgínia Tavares Ribeiro.

(...)

The floor was offered to the Coordinator of the Eligibility and Compensation Committee, Ana Sílvia Corso Matte, who presented the points addressed in the Eligibility and Compensation Committee and recommended the approval of the appointment of Mr. Carlos Augusto Leone Piani to hold the position of CEO of Sabesp. Subsequently, the attending Board members approved the election of Mr. CARLOS AUGUSTO LEONE PIANI, Brazilian, married, Business Administrator, identification document (RG) number 09.578.876-6 – IFP/RJ, individual taxpayer’s ID (CPF) number 025.323.737-84, domiciled at Rua Costa Carvalho, 300, São Paulo/SP, CEP 05429-000, as the CEO of the Company for a term of office of 2 (two) years, who will be invested in office on October 01, replacing Mr. Andre Gustavo Salcedo Teixeira Mendes, who presented his resignation letter today, and whose effects are subject to the investiture of the new CEO. The Chair of the Board of Directors, Karla Bertocco, on behalf of the Board of Directors, thanked and acknowledged the CEO, Andre Salcedo, for all the accomplishments while in office. Mr. Andre Salcedo thanked the acknowledgments and recalled the main challenges and achievements of Sabesp’s management process during the privatization process.

(...)

Minutes signed by the attending Board of Directors members, namely Karla Bertocco Trindade, Ana Silvia Corso Matte, Anderson Marcio de Oliveira, Andre Gustavo Salcedo Teixeira Mendes, Aurélio Fiorindo Filho, Eduardo França de La Peña, Eduardo Person Pardini, Gustavo Rocha Gattass, Karolina Fonsêca Lima, and Nerylson Lima da Silva.

This is a free English translation of the excerpt of the minutes drawn up in the book of Minutes of the Board of Directors’ Meetings.

São Paulo, October 02, 2024.