Centrais Eletricas Brasileiras S A Eletrobrás : RELEVANT FACT (Form 6-K)

RELEVANT FACT

CENTRAIS ELÉTRICAS BRASILEIRAS S/A CNPJ: 00.001.180/0001-26 | NIRE: 533.0000085-9 PUBLIC COMPANY

Centrais Elétricas Brasileiras S/A ('Company' or 'Eletrobras') (B3: ELET3, ELET5 & ELET6; NYSE: EBR & EBR.B; LATIBEX: XELT.O & XELT.B) hereby informs its shareholders and the market in general in addition to the Relevant Fact disclosed on April 29, 2021, that the Companhia de Geração e Transmissão de Energia Elétrica do Sul do Brasil ('CGT Eletrosul') entered into, on this date, the Share Purchase and Sale Agreement ('CCVA') with Companhia Estadual de Transmissão de Energia Eletrica ('CEEE-T'), through which it acquired 49% of the participation held by CEEE-T in Fronteira Oeste Transmissora de Energia SA ('FOTE'), now holding 100% of the shares of referred SPE.

According to the CCVA, CGT Eletrosul will pay CEEE-T the amount of BRL 83,101,000.00 (eighty-three million, one hundred and one thousand reais). The informed transaction must be concluded within 30 (thirty) days, with the respective transfer of the shares in the FOTE Share Registration and Transfer Book and the payment of the price.

CGT Eletrosul will in the future promote the incorporation of FOTE, within the scope of the initiative to rationalize Eletrobras' shareholdings, under the terms of the Business and Management Master Plan ('PDNG 2021-2025') disclosed to the market by means of a Relevant Fact on December 23, 2020.

The Company will keep the market informed about the next steps of the operations included in this Relevant Fact.

Rio de Janeiro, May 21, 2021

Elvira Cavalcanti Presta

CFO and Investor Relations Officer

This document may contain estimates and forecasts that are not statements of fact that occurred in the past but reflect our management beliefs and expectations and may constitute future events' forecasts and estimates under Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities and Exchange Act of 1934, as amended. The words 'believe', 'may', 'estimate', 'continue', 'anticipate', 'intend', 'expect' and related words are intended to identify estimates that necessarily involve risks and uncertainties, known or unknown . Known risks and uncertainties include, but are not limited to: general economic, regulatory, political and commercial conditions in Brazil and abroad, changes in interest rates, inflation and value of the Real, changes in volumes and the pattern of use of electricity by consumer, competitive conditions, our level of indebtedness, the possibility of receiving payments related to our receivables, changes in rainfall and water levels in the reservoirs used to operate our hydroelectric plants, our financing and capital investment plans, existing and future government regulations , and other risks described in our annual report and other documents filed with CVM and SEC. Estimates and forecasts refer only to the date they were expressed and we assume no obligation to update any of these estimates or forecasts due to the occurrence of new information or future events. Future results of the Company's operations and initiatives may differ from current expectations and the investor should not rely solely on the information contained herein. This material contains calculations that may not reflect accurate results due to rounding.