Companhia Energetica de Minas Gerais CEMIG : Notice to the Market- Blackrock - Significant shareholding

COMPANHIA ENERGÉTICA DE MINAS GERAIS - CEMIG

PUBLICLY HELD COMPANY

Corporate Taxpayer's ID (CNPJ): 17.155.730/0001-64

Company Registry (NIRE): 31.300.040.127

NOTICE TO THE MARKET

COMPANHIA ENERGÉTICA DE MINAS GERAIS - CEMIG ("Cemig or Company"), according to article 12 of CVM Resolution 44/2021, of August 23, 2021, hereby announces that it received a mail from BlackRock, Inc. ("BlackRock"), headquartered at 55 East 52nd Street, in the city and state of New York, 10022-0002, United States, informing that on April 04, 2023, its shares, in the aggregate, now retain 10.015% of the Company's total capital, of which 198,316,005 preferred shares and 22,149,447 American Depositary Receipts ("ADRs"), representing 22,149,447 preferred shares, totaling 220,465,452 (15.043%) preferred shares and 16,836,657 derivative financial instruments referenced to preferred shares with a financial settlement, accounting for approximately 1.148% of the total preferred shares issued by Cemig.

As a reference, according to the notice dated September 05, 2022, the date of the last mail received by the Company, BlackRock informed that it held 9.913% of Cemig's total capital, of which 14.89% preferred shares.

In the same mail, BlackRock, Inc. also states that:

"... the aforementioned equity interest is strictly for investment purposes, not for a change in the Company's shareholding control or administrative structure. BlackRock did not enter into any agreements or contracts that regulate voting rights or the purchase and acquisition of securities issued by the Company".

Belo Horizonte, April 10, 2023.

Leonardo George de Magalhães

Chief Financial and Investor Relations Officer