Material Fact - 5-year Investment Plan

The estimates consider an investment plan developed in a coordinated manner, aimed at addressing the local needs of the 31 municipalities in the concession area of its distribution company. The main guidelines of the projects in this plan include:

• Network modernization, with extensive digitalization and automation;

• Replacement and upgrade of legacy systems, aimed at greater operational efficiency and technological integration;

• Strengthening of grid resilience, focused on reliability and service continuity;

• Raising the standards of quality and customer service, sustaining the continuous improvement of the service provided;

• Construction works related to measures to combat non-technical losses, focused on the recovery of electric energy;

• Support for the modernization process, promoting structural technological advancement in the sector.

Rio de Janeiro, May 11, 2026.

Chief Financial and Investor Relations Officer LIGHT S.A. - IN JUDICIAL REORGANIZATION LIGHT SERVIÇOS DE ELETRICIDADE S.A.

Legal Notice Regarding Forward-Looking Statements:

This Material Fact contains forward-looking statements and information related to the Company, which reflect the current view and/or expectations of the Company and its management regarding future events and its business plan. Forward-looking statements include, among others, all statements that denote forecasts, projections, or that indicate or imply future results, performance or achievements, and may be identified by the use of terms such as "believe", "anticipate", "expect", "contemplate", "will likely result" or other words or expressions of similar meaning.

The projections presented herein are based on assumptions considered reasonable by management on the date of this Material Fact, but involve judgments and estimates that may prove inaccurate over time. We caution that several important factors may cause actual results to differ materially from the plans, objectives, expectations, estimates and intentions expressed in this Material Fact, including, among others, general economic and market conditions, industry conditions, corporate approvals, operational factors and other factors.

Accordingly, the forward-looking statements contained herein are made only as of the date of this Material Fact and do not constitute a guarantee of future performance and are subject to a number of risks, uncertainties and material assumptions, many of which are beyond the Company's control.

Under no circumstances shall the Company or its subsidiaries, their directors, officers, representatives or employees be liable to any third parties (including investors) for investment or business decisions or actions taken on the basis of the information and statements contained in this Material Fact, nor for any indirect, consequential or similar damages.

Except as required by Brazilian securities legislation and by the rules and regulations of the Brazilian Securities and Exchange Commission (CVM), or by regulators in other applicable jurisdictions, the Company does not intend to provide eventual shareholders with a revision of the forward-looking statements or an analysis of the differences between the forward-looking statements and actual results.