Companhia de Saneamento do Paraná SANEPAR : Notice to Shareholders - Information about change of the event date of the 60th AGM

COMPANHIA DE SANEAMENTO DO PARANÁ

NOTICE TO SHAREHOLDERS

Companhia de Saneamento do Paraná ("Sanepar"), ("Company"), informs its shareholders that the Board of Directors, at its 3rd/2024 Ordinary Meeting held on this date, approved the change of the event date of the 60th Annual General Meeting ("AGM") to April 29, 2024.

We hereby advise that the Company's shareholders may request the inclusion of candidates for the Board of Directors or resolution proposals in the Distance Voting Ballot, subject to the percentages of shares designated in Exhibits N and O, as well as compliance with the provisions set forth in Article 38 of CVM Resolution No. 81/2022.

Any request for inclusion must be submitted to the Company by March 15, 2024, in the case of resolution proposals, and by April 4, 2024, in the case of inclusion of Board of Directors candidates, by sending a written request to Rua Engenheiros Rebouças, 1376, Rebouças, Curitiba, Paraná, Zip Code (CEP) 80215-900, or by email to bvd@sanepar.com.br, addressed to the Chief Financial and Investor Relations Officer.

The Call Notice, the Management Proposal and the Participation Manual will be made available in due course, in accordance with the applicable legislation and regulations.

Curitiba, March 14, 2024.

Abel Demetrio

Chief Financial and Investor Relations Officer

This is a free translation for informative purposes only, without any legal validity. The original text in Portuguese is the only

legal version and must be consulted in order to elucidate any doubts or conflicts.