Companhia de Saneamento Básico do Estado de São Paulo - SABESP (SABESP) Stock Split Announcement

Companhia de Saneamento Básico do Estado de São Paulo - SABESP (SABESP) announced a proposed stock split of all its common shares at a ratio of 1:5. This means each existing common share will be converted into five new common shares, with no change to the company's share capital. The split is subject to approval at an Extraordinary Shareholders’ Meeting on April 28, 2026. If approved, the new shares will be distributed to shareholders, with trading ex-split rights commencing on April 29, 2026, for shares on the Brazilian Stock Exchange (B3) and May 7, 2026, for American Depositary Receipts (ADRs) on the New York Stock Exchange (NYSE). The ADR to common share ratio will remain 1:1. This corporate action is not expected to alter the proportional ownership interests or the rights of shareholders regarding dividends and other distributions.