SABESP CFO Daniel Szlak Sells All Common Shares

This Form 4 filing reports that Daniel Szlak, Chief Financial Officer of Companhia de Saneamento Basico do Estado de Sao Paulo-SABESP (SBS), sold all of his common shares in the company on June 15, 2026. The transactions involved two separate sales: 7,300 shares at $28.30 per share and 81 additional shares at the same price, totaling 7,381 shares. Following these transactions, Szlak holds zero common shares in the company. The filing was signed by Beatriz Caroline de Sousa Daher as attorney-in-fact for Roberval Tavares de Souza on June 16, 2026. This represents a complete divestment of the CFO's direct ownership position in SABESP common stock.