PUBLICLY HELD COMPANY COMPANY REGISTRY (NIRE): 313.000.363-75
CORPORATE TAXPAYER'S ID (CNPJ): 17.281.106/0001-03
Companhia de Saneamento de Minas Gerais - COPASA MG (B3: CSMG3) ("Company" or "COPASA MG"), in compliance with Resolution 44 of the Brazilian Securities and Exchange Commission (CVM) of August 23, 2021, and further to the Material Facts disclosed on November 14, 2024, November 05, 2025, December 17, 2025, January 28, 2026, and February 20, 2026, as well as the Notices to the Market disclosed on March 16, 2026 and April 16, 2026, hereby informs its shareholders and the market in general that it became aware of the decision issued by the Court of Accounts of the State of Minas Gerais ("TCE-MG") within the scope of Monitoring Proceeding no. 1208049, rendered during the 10th Ordinary Session of the Full Court initiated this morning, authorizing the continuation of the potential public follow-on offering of shares issued by COPASA MG, to be carried out within the context of the privatization process, pursuant to State Law 25,664/2025 ("Offering"). The TCE-MG established that the continuation of the privatization process shall remain subject to the oversight of such authority and shall comply with certain conditions and procedures.
The completion of the Offering is subject to, among other factors, obtaining the applicable approvals (including corporate and creditors' approvals), macroeconomic and market conditions, the execution of definitive agreements, and compliance with the procedures outlined in the applicable regulations.
This Material Fact is for informational purposes only and does not constitute, under any circumstances, an investment recommendation, an offer to sell, or a solicitation of an offer to purchase any securities issued by the Company, including under the applicable laws of Brazil, the United States of America, or any other jurisdiction.Belo Horizonte, May 18, 2026.
Adriano Rudek de Moura
Chief Financial and Investor Relations Officer