• SABESP set a 1-for-5 stock split, turning each common share into five common shares with no change to share capital.
• Common shares will trade ex-split from April 29, 2026, based on shareholder positions as of April 28, 2026.
• Share capital will be divided into 3,524,534,025 common shares, plus one special class preferred share held by State of São Paulo.
• Split shares will be credited on April 30, 2026, then reflected in positions at market open on May 4, 2026.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. SABESP - Companhia de Saneamento Básico do Estado de São Paulo published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001292814-26-002627), on April 29, 2026, and is solely responsible for the information contained therein.