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Operating Context (Tables)

12 Months Ended

Dec. 31, 2023

Schedule of Distribution and Sale of Energy and Gas

CEMIG holds equity interests in the following subsidiaries, jointly controlled entities and affiliates, all of which principal activities are construction and operation of systems of generation, distribution and sale of energy and gas:


Investments	% share	Description
Subsidiaries
Cemig Geração e Transmissão S.A. (“Cemig GT” ou “Cemig Geração e Transmissão”)	100.00	Subsidiary engaged in the energy generation and transmission services. Its shares are listed in Brazil, but are not actively traded. CEMIG GT has interests in 68 power plants (60 of which are hydroelectric, 7 are wind power and 1 is solar) and associated transmission lines, most of which are part of the Brazilian national generation and transmission grid system, with total installed generation capacity of 5,517 MW.
Cemig Baguari Energia S.A. (“Cemig Baguari“)	100.00	Production and commercialization of electricity under an independent production regime and participation in other companies or consortia whose purpose is the production and commercialization of electricity in future projects.
Cemig Geração Itutinga S.A (“Cemig Geração Itutinga”)	100.00	A public limited company, a wholly-owned subsidiary of the Company, its purpose is to produce and sell electricity, as a public service concessionaire, through the operation of the Itutinga Power Station, as well as to sell electricity on the free trading market.
Cemig Geração Camargos S.A (“Cemig Geração Camargos”)	100.00	A public limited company, a wholly-owned subsidiary of the Company, its purpose is to produce and sell electricity, as a public service concessionaire, through the operation of the Camargos Power Station, as well as to sell electricity on the free trading market.


Investments	% share	Description
Cemig Geração Sul S.A (“Cemig Geração Sul”)	100.00	A public limited company, a wholly-owned subsidiary of the Company, its purpose is to produce and sell electricity, as a public service concessionaire, through the operation of the Coronel Domiciano, Marmelos, Joasal, Paciência and Piau SHPs, as well as to sell electricity on the free trading market.
Cemig Geração Leste S.A (“Cemig Geração Leste”)	100.00	A corporation, a wholly-owned subsidiary of the Company, its purpose is to produce and sell electricity, as a public service concessionaire, through the operation of the Dona Rita, Sinceridade, Neblina, Ervália, Tronqueiras and Peti SHPs, as well as to sell electricity on the free trading market.
Cemig Geração Oeste S.A (“Cemig Geração Oeste”)	100.00	A public limited company, a wholly-owned subsidiary of the Company, its purpose is to produce and sell electricity, as a public service concessionaire, through the operation of the Gafanhoto, Cajuru and Martins SHPs, as well as to sell electricity on the free trading market.
Rosal Energia S.A. (“Rosal”)	100.00	Production and sale of electricity, as a public electricity service concessionaire, through the Rosal Hydroelectric Power Plant, located on the border between the states of Rio de Janeiro and Espírito Santo.
Sá Carvalho S.A. (“Sá Carvalho”)	100.00	Production and sale of electricity, as a public electricity service concessionaire, through the Sá Carvalho Hydroelectric Power Plant, located on the Piracicaba River, in the municipality of Antônio Dias, in the state of Minas Gerais.
Horizontes Energia S.A. (“Horizontes”)	100.00	Generation and sale of electricity, under an independent production regime, through the Machado Mineiro and Salto do Paraopeba Hydroelectric Power Plants, located in the state of Minas Gerais, and Salto Voltão and Salto do Passo Velho, located in the state of Santa Catarina, in addition to the sale of electricity at the Electricity Trading Chamber ("CCEE").
Cemig PCH S.A. (“Cemig PCH”)	100.00	Production and sale of electricity under an independent production regime, through the Pai Joaquim Hydroelectric Power Plant, located on the Araguari River, in the municipalities of Sacramento and Santa Juliana, in the state of Minas Gerais.
Cemig Trading S.A. (“Cemig Trading”)	100.00	Marketing and intermediation of energy-related business.
Empresa de Serviços e Comercialização de Energia Elétrica S.A. (“ESCEE”)	100.00	Marketing and intermediation of energy-related business.
Cemig Geração Poço Fundo S.A. (“Poço Fundo”)	100.00	Production and sale of electricity, under an independent production regime, through the Poço Fundo hydroelectric plant, located on the Machado River, in the municipality of Poço Fundo, in the state of Minas Gerais.
Central Eólica Praias de Parajuru S.A. (“Central Eólica Praias de Parajuru”)	100.00	Generation and sale of electricity through a wind farm located in the municipality of Beberibe, in the state of Ceará. It has 19 wind turbines, with towers 85 m high. All its energy is sold through Proinfa.
Central Eólica Volta do Rio S.A. (“Central Eólica Volta do Rio”)	100.00	Generation and sale of electricity through the wind farm located in the municipality of Acaraú, in the state of Ceará. It has 28 wind turbines with 65-meter-high towers. All its energy is sold through Proinfa.
Cemig Distribuição S.A. (“Cemig D” ou “Cemig Distribuição”)	100.00	Operation of electricity distribution through networks and distribution lines in practically the entire state of Minas Gerais.
Companhia de Gás de Minas Gerais (“Gasmig”)	100.00	Acquisition, transportation and distribution of fuel gas or by-products and derivatives, through a gas distribution concession in the state of Minas Gerais.
Cemig Sim	100.00	A wholly owned subsidiary of CEMIG that operates in distributed generation and energy solutions, with investments in the acquisition of photovoltaic plants. Currently CEMIG SIM has reached 14,000 customers, providing energy efficiency, optimization and solution services, through studies and project execution, as well as operation and maintenance services for energy supply facilities.
Companhia de Transmissão Centroeste de Minas (“Centroeste”)	100.00	Construction, implementation, operation and maintenance of electricity transmission facilities in the National Interconnected System.
Sete Lagoas Transmissora de Energia S.A. (“Sete Lagoas”)	100.00	Operation of public electricity transmission service concessions, provided through the construction, operation and maintenance of electricity transmission facilities at the Sete Lagoas 4 Substation, in the municipality of Sete Lagoas, Minas Gerais.
Photovoltaic power plants (1)	100.00	Photovoltaic solar power generation for the distributed generation market.
Jointly Controlled Entities
Guanhães Energia S.A. (“Guanhães Energia”)	49.00	Production and sale of electricity through the implementation and operation of the Dores de Guanhães; Senhora do Porto; and Jacaré Small Hydroelectric Power Plants, located in the municipality of Dores de Guanhães; and Fortuna II, located in the municipality of Virginópolis. All in the state of Minas Gerais.
Paracambi Energética S.A. ("Paracambi")	49.00	Independent production of electricity, through the implementation and exploitation of the hydraulic potential called PCH Paracambi, located on the Ribeirão das Lages river in the municipality of Paracambi/RJ.
Usina Hidrelétrica Itaocara S.A. (“Itaocara”)	49.00	The UHE Itaocara Consortium, formed by Cemig GT and Itaocara Energia (Light Group), is responsible for building the Itaocara I Hydroelectric Power Plant (UHE Itaocara I).
Hidrelétrica Cachoeirão S.A. (“Cachoeirão”)	49.00	Production and sale of electricity, under an independent production regime, through the Cachoeirão Hydroelectric Power Plant, located in Pocrane/MG.


Investments	% share	Description
Hidrelétrica Pipoca S.A. (“Pipoca”)	49.00	Independent production of electricity, through the implementation and exploitation of the hydraulic potential called PCH Pipoca, located on the Manhuaçu River, in the municipalities of Caratinga and Ipanema/MG.
Amazônia Energia Participações S.A (“Amazônia Energia”)	74.50	Special-purpose company (SPE), created by the Company, which holds a 74.50% stake, and Light, which holds the remaining 25.50%, for the purpose of acquiring a 9.77% stake in Norte Energia S.A. ("NESA"), the company that holds the concession for the Belo Monte Hydroelectric Power Plant ("Belo Monte HPP"), on the Xingu River, located in the state of Pará.
Aliança Norte Energia Participações S.A. (“Aliança Norte”)	49.00	Special-purpose company (SPE), set up by the Company, which holds a 49.00% stake, and Vale S.A., which holds the remaining 51.00%, for the purpose of acquiring a 9.00% stake in Norte Energia S.A. ("NESA"), the company that holds the concession for the Belo Monte Hydroelectric Power Plant ("Belo Monte HPP"), on the Xingu River, located in the state of Pará.
Aliança Geração de Energia S.A. (“Aliança”)	45.00	Private limited company created by the Company and Vale S.A. to become a platform for consolidating generation assets held by the parties in generation consortia and investments in future electricity generation projects. Vale S.A. and the Company hold 55.00% and 45.00% of the total capital, respectively.
Transmissora Aliança de Energia Elétrica S.A. (“Taesa”)	21.68	Construction, implementation, operation and maintenance of electricity transmission facilities in all regions of the country, directly and through participation in investees.
FV Janaúba Geração de Energia Elétrica Distribuída SA UFV Corinto Geração de Energia Elétrica Distribuída SA UFV Manga Geração de Energia Elétrica Distribuída SA UFV Bonfinópolis II Geração de Energia Elétrica Distribuída SA UFV Lagoa Grande Geração de Energia Elétrica Distribuída SA, UFV Lontra Geração de Energia Elétrica Distribuída SA, UFV Mato Verde Geração de Energia Elétrica Distribuída SA, UFV Mirabela Geração de Energia Elétrica Distribuída SA, UFV Porteirinha Geração de Energia Elétrica Distribuída SA, UFV Porteirinha II Geração de Energia Elétrica Distribuída SA e UFV Brasilândia Geração de Energia Elétrica Distribuída S.A. Apolo I Empreendimentos e Energia S.A. G2 Campo Lindo I Energia S.A. G2 Campo Lindo II Energia S.A. G2 Olaria I Energia S.A. UFV Fazenda Prudente SPE LTDA	49.00	Photovoltaic solar power generation for the distributed generation market.