Companhia de Saneamento Básico do Estado de São Paulo - SABESP Material Fact

Companhia de Saneamento Básico do Estado de São Paulo - SABESP (SABESP) announced that its Board of Directors approved the payment of interest on equity (JCP) and a capital stock increase. The JCP will be paid in a gross amount equivalent to R$ 1,798,000,000.00. The capital stock will be increased by R$ 2,810,000,000.00 through the capitalization of profits reserves, resulting in the issuance of 20,264,000 new common shares. These new shares will be distributed to existing shareholders at a ratio of 0.029646975 new common shares for each common share held as of December 23, 2025. Further details are available in the minutes of the Board of Directors' meeting and related notices.