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ENERGY CO OF MINAS GERAIS

For the period ended Dec 31, 2026. Filed Nov 4, 2026.

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About this filing

What a company based outside the US has published at home or sent to its shareholders. It is how many foreign companies share results and news between annual reports.

Dec 31, 2026 · Filed Nov 4, 2026

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CIG-C$2.82-2.8%Stored close · as of Nov 6, 2026
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6-K 1 cig20261103_6k.htm 6-K

United States

Securities and exchange commission

washington, d.c. 20549

FORM 6-K

report of foreign private issuer

pursuant to rule 13 a-16 or 15 d-16 of

the securities exchange act of 1934

For the month of November 2026

Commission File Number 1-15224

Energy Company of Minas Gerais

(Translation of Registrant’s Name into English)

Avenida Barbacena, 1200

30190-131 Belo Horizonte, Minas Gerais, Brazil

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F a Form 40-F ___

Index

Item Description of Items

1.Material Fact – Election of Chief Executive Officer and Chair of the Board of Directors, dated September 11, 2026
2.Notice to Shareholders – Declaration of Interest on Equity, dated September 17, 2026
3.Notice to Shareholders – Nomination of Candidates to the Board of Directors and Request for Adoption of Cumulative Voting, dated September 23, 2026
4.Notice to the Market – Settlement of Debentures from Cemig GT’s 13th Issuance, dated September 9, 2026
5.Notice to the Market – Settlement of Debentures from Cemig D’s 16th Issuance, dated September 9, 2026
6.Material Fact – Extension of the Concession for the Sá Carvalho Hydroelectric Power Plant, dated August 31, 2026
7.Notice to the Market – Change of Depositary Bank for the ADR Program, dated October 16, 2026

Forward-Looking Statements

This report contains statements about expected future events and financial results that are forward-looking and subject to risks and uncertainties. Actual results could differ materially from those predicted in such forward-looking statements. Factors which may cause actual results to differ materially from those discussed herein include those risk factors set forth in our most recent Annual Report on Form 20-F filed with the Securities and Exchange Commission. CEMIG undertakes no obligation to revise these forward-looking statements to reflect events or circumstances after the date hereof, and claims the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

COMPANHIA ENERGÉTICA DE MINAS GERAIS – CEMIG

By:/s/ Leonardo George de Magalhães.

Name: Leonardo George de Magalhães

Title: Vice President of Finance and Investor Relations

Date: November 4, 2026

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