ISA ENERGIA BRASIL

What ISA ENERGIA BRASIL does

ISA ENERGIA BRASIL S.A. (formerly ISA CTEEP) is the largest electricity transmission operator in Brazil, holding 34 ANEEL concessions across 18 states and operating more than 23,000 km of transmission circuits and 137 substations at voltages up to 550 kV. The company is responsible for transmitting approximately 30% of all electricity in Brazil and 95% of the energy transmitted in the state of S\u00e3o Paulo, serving Brazilian distribution utilities connected to the national interconnected grid (SIN) and operating under the regulatory oversight of ANEEL. The company is listed on B3 under tickers ISAE3 and ISAE4, and is controlled by Colombian strategic parent ISA (Interconexi\u00f3n El\u00e9ctrica S.A.), which holds 35.82% of total capital.

The company's core technical infrastructure consists of high-voltage transmission lines, substations, shunt reactors, and grid management systems. It is a pioneer in several Brazilian grid technologies, including the first FACTS system using SSSC technology (Ribeir\u00e3o Preto Substation), the first 460 kV natural ester-filled shunt reactor in Latin America (Bauru Substation, with Hitachi Energy), the first digital and 4.0 substations, the first large-scale battery energy storage system, and the first automatic splicing implementation that reduces cable connection time by 87.5%. It is also piloting photovoltaic generation under transmission line rights-of-way, with simulated potential of 1,224 MWp. The product portfolio includes greenfield projects (Piraqu\u00ea, Serra Dourada, Itatiaia, \u00c1gua Vermelha, Riacho Grande, Jacarand\u00e1, Minuano), Refor\u00e7os e Melhorias (R&M) modernization services, and ESG/sustainability programs (Conex\u00e3o Jaguar REDD+ carbon credit initiative, Green Bond framework, Net Zero 2050 commitment).

The business model is a regulated B2G/B2B concession model. Revenue is earned via the Receita Anual Permitida (RAP) mechanism administered by ANEEL, an inflation-indexed annual permitted revenue stream with terms typically spanning 30 years. The 2026 RAP reaches R$6.4 billion. The company bids in ANEEL transmission auctions to win new greenfield concessions, each contributing additional RAP upon commercial operation; recently completed and active projects include Piraqu\u00ea (R$4.4 billion investment), Serra Dourada, Itatiaia, Jacarand\u00e1, and Minuano. The company additionally generates revenue through R&M modernization investments (R$5.1 billion in 2025, R$370 million in Q1 2026) and portfolio optimization transactions such as the March 2026 Axia Energia asset unwinding. Capital structure is funded primarily through debentures (21st issuance of R$3.9 billion in Q1 2026) and BNDES facilities, with net debt of R$15.4 billion and leverage of 3.72x at Q1 2026.

Name

ISA ENERGIA BRASIL

Legal name

ISA ENERGIA BRASIL S.A.

Website

https://isaenergiabrasil.com.br

Company type

Public

Operating status

Operating

Short description

ISA Energia Brasil is Brazil's largest electricity transmission operator, holding 34 ANEEL concessions across 18 states and operating 23,000+ km of transmission circuits and 137 substations that transmit approximately 30% of national and 95% of S\u00e3o Paulo's electricity to distribution utilities under the regulated RAP mechanism.

Ownership category

akta.pro rank

Product category

Electric Power Transmission Services

NAICS

Electric Bulk Power Transmission and Control (221121), Electric Power Transmission, Control, and Distribution (22112), Electric Power Generation, Transmission and Distribution (2211)

SIC

Electric Services (4911), Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

HVAC Transmission Lines (EHV/UHV Overhead & Underground) (EUADAAAD)

akta.pro secondary industries

High-Voltage (HV) Substations & AIS Switchgear (EUADACAA), High-Voltage Electrical Systems (Switchgear, Transformers, Protection & Control) (EUAEAFAA), Grid Interconnection & Collector Substation EPC (Utility-Scale Renewables) (EUAEABAK), EHV/HVDC converter station & FACTS EPC integration services (EUADAKAL)

Keywords

• Electricity transmission services
• High-voltage transmission infrastructure
• Regulated power transmission
• Transmission grid operations
• Energy transmission concessions

Headquarters

HQ city

São Paulo

HQ country

Brazil

HQ region

Latin America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Supply Chain, Operations, Personnel, Technology or R&D, Others, Marketing or Sales

Revenue model

1. Transmission Network Operation (RAP): ISA Energia Brasil operates as a regulated electricity transmission company under long-term concessions granted by ANEEL. The company earns revenue through the Annual Permitted Revenue (RAP/Receita Anual Permitida) mechanism, which is inflation-linked and provides stable, predictable returns. The regulatory revenue potential (RAP) reached R$ 6.4 billion for 2026. Revenue components include the base RAP and the Rede Básica Sistema Existente (RBSE) component.
2. Greenfield Project Investments: The company invests in new transmission projects (greenfield) won through ANEEL auctions, which generate revenue upon commercial operation. Projects include Serra Dourada (BA/MG), Itatiaia (MG/RJ), and Piraquê (MG/ES). Total investment of R$ 4.4 billion for Piraquê alone. These projects provide new RAP streams upon energization.
3. Reforços e Melhorias (R&M) — Modernization Projects: Investments in reinforcement and improvement projects for the existing transmission infrastructure, authorized by ANEEL, generating regulated returns. In 2025, the company invested R$ 1.7 billion in R&M projects. These are part of the regulated asset base and contribute to RAP.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

ISA Energia Brasil operates a regulated high-voltage electricity transmission business in Brazil, delivering power across more than 23,000 km of transmission circuits and 137 substations (up to 550 kV) under 34 ANEEL concessions spanning 18 states. The company transmits roughly 30% of Brazil's electricity and 95% of São Paulo state's electricity to distribution utilities, and earns revenue primarily through the inflation-indexed Annual Permitted Revenue (RAP) mechanism. It also delivers greenfield transmission projects won at ANEEL auctions and reinforcement/modernization (R&M) services on its existing asset base.

Product overview

ISA ENERGIA BRASIL operates as Brazil's largest electricity transmission operator with 34 concessions across 18 states. The core offering is electricity transmission infrastructure management, comprising over 23,000 km of transmission circuits and 137 substations operating at voltages up to 550 kV, handling approximately 30% of Brazil's electricity and 95% of São Paulo state's transmission. The company delivers greenfield transmission projects (Piraquê, Serra Dourada, Itatiaia, Água Vermelha, Riacho Grande, Jacarandá, Minuano), Reinforcement and Improvement (R&M) services, and operates pioneering technologies including Brazil's first FACTS SSSC system, first digital/4.0 substations, and first large-scale battery storage system. Sustainability programs include the Conexão Jaguar carbon credit program, Conexão Desenvolvimento social investment, and Green Bonds framework. The company is owned by Colombian ISA Group (35.82%).

Differentiator

Problem solved

Functional benefit

Brands

• Conexão Jaguar: Environmental program promoting biodiversity conservation and carbon credit generation through REDD+ and ARR projects supporting jaguar habitat protection.
• Conexão Desenvolvimento
• Programa Conectados com a Vida
• Programa Outros Olhares
• Programa VIDA

Products and services

• Electricity Transmission Services Regulated high-voltage electricity transmission service provided through 34 ANEEL concessions across 18 states, using more than 23,000 km of transmission circuits and 137 substations (up to 550 kV) to deliver approximately 30% of Brazil's electricity and 95% of São Paulo state's electricity to distribution utilities.
• Project Piraquê Greenfield transmission project between Minas Gerais and Espírito Santo, awarded in ANEEL Auction 01/22 with R$ 4.4 billion planned investment, focused on transmitting renewable energy from northern Minas Gerais.
• Project Serra Dourada
• Project Itatiaia Greenfield transmission project linking Minas Gerais and Rio de Janeiro, under execution with entry into operation planned by 2028, generating new RAP upon energization.
• Project Água Vermelha Greenfield transmission project in São Paulo state, already delivered and operational, contributing to the company's regulated asset base and RAP.
• Project Riacho Grande Underground transmission line project serving the São Paulo and ABC region, designed to increase the reliability of electricity supply in the metropolitan area.
• Project Jacarandá Substation expansion at Água Azul in Guarulhos, São Paulo, designed to reinforce the electrical infrastructure serving the Guarulhos Airport region.
• Project Minuano Transmission project under development in Rio Grande do Sul state, part of the company's greenfield expansion pipeline.
• Reforços e Melhorias (R&M) - Reinforcement and Modernization Service AN EEL-authorized reinforcement and modernization service for the existing transmission asset base, covering equipment replacement, capacity expansion, and reliability upgrades, contributing to the regulated asset base and RAP.
• Green Bonds Framework / Green Debentures Green bond framework and green debenture issuances — the first in Brazil's transmission segment — used to finance eligible sustainable transmission projects, with second-party opinions from Nint and ERM confirming alignment with international green bond standards.

Quantifiable outcome

• 30% of all electricity transmitted in Brazil, 95% in São Paulo state
• +7 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature4 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Hitachi EnergycoreTechnology or Integration · 13 May 2026Hitachi Energy delivered its first 460 kV natural ester-filled shunt reactor to ISA Energia Brasil for installation at the Bauru Substation in São Paulo. This is the largest shunt reactor ever built by Hitachi Energy using natural ester oil and the first in Latin America. The project comprises four single-phase units with 66.67 MVAr capacity each, with the first unit operational in May 2026. The technology combines innovation, operational safety, and environmental sustainability with improved biodegradability compared to conventional oils. The company also worked with Hitachi Energy on the M-SSSC FACTS technology project at Ribeirão Preto Substation.
• BotCitycoreTechnology or Integration · 29 April 2026BotCity's automation platform is being used by ISA Energia Brasil to support the evolution of its automation governance and a newly launched Citizen Developer program. The initiative aims to centralize control, visibility, and standardization of automation processes across the Brazilian power transmission operator while enabling employees to create automations internally with an emphasis on security and traceability. This engagement signals growing traction in the utilities and infrastructure sector for BotCity.
• Axia Energia (Eletrobras subsidiary)coreStrategic or Co-development Partner · 19 March 2026ISA Energia Brasil and Axia Energia (Eletrobras) completed a cross-shareholding decrossing transaction in two electricity transmission ventures: ISA acquired full control of Interligação Elétrica (IE) Madeira while divesting its stake in IE Garanhuns to Axia. Axia paid ISA R$ 1.174 billion as part of the transaction. The deal simplifies corporate structures and optimizes each company's portfolio. IE Madeira represents a 2,385-km high-voltage system across five Brazilian states with annual permitted revenue of R$ 760.7 million.
• ERM (Independent Evaluation)minorOthers · 1 January 2024ERM provides independent evaluation and second-party opinion for ISA Energia Brasil's Green Bond Impact Report 2024, confirming alignment with international standards.
• Instituto Homem Pantaneiro (IHP)minorStrategic or Co-development Partner · 30 November 2023Partnership to map forest areas in the Pantanal with potential for developing new preservation and recovery projects for carbon credit generation. The initiative is part of the Conexão Jaguar program and focuses on the conservation of jaguar habitat. The partnership has already supported the first REDD+ project in the Pantanal (Serra do Amolar), protecting 135,000+ hectares with potential to reduce over 430,000 tonnes of CO2e until 2030.
• Onçafari (Documentary Sponsorship)minorGTM or Marketing Partner · 23 November 2023ISA CTEEP (now ISA Energia Brasil) sponsored the documentary 'Diário de Uma Onça', which tells the story of three generations of jaguars surviving in the Pantanal thanks to the work of the Onçafari NGO. Part of the Conexão Jaguar biodiversity program.
• Nint (Independent Evaluation)minorOthers · 23 January 2023Nint provides independent evaluation and second-party opinion for ISA Energia Brasil's Green Bond Framework, confirming alignment with international standards for green bond issuance.

Scale indicators21 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Alupar Investimento: Brazilian transmission and generation holding company operating multiple ANEEL-awarded concessions with revenue from the same RAP regulatory mechanism. Comparable scale, business model, and exposure to greenfield transmission project execution risk.
• Taesa (Transmissora Aliança de Energia Elétrica): Brazil's largest pure-play publicly traded electricity transmission operator after ISA Energia Brasil, with concessions won through ANEEL auctions and revenue earned under the same RAP mechanism. Highly comparable business model, regulatory framework, and end customers.
• State Grid Brazil Holding: Subsidiary of China's State Grid Corporation operating multiple high-voltage transmission concessions in Brazil through ANEEL auctions. Direct competitor in concession bidding with similar long-duration infrastructure business model.

Regional players

• Eneva: Brazilian integrated power company combining thermal generation with transmission concessions, focused on integrated solutions. Comparable ANEEL auction participation and Brazilian regulatory environment though primarily a generation-led business model.
• Transelec (Chile): Chile's main electricity transmission system operator serving the central and northern grids. Regional Latin American transmission peer with comparable high-voltage infrastructure, regulatory model (toll-based revenue), and exposure to renewable energy integration.

Broad incumbents

• Equatorial Energia: Brazilian multi-utility holding company with transmission, distribution, and generation assets. Operates transmission concessions under ANEEL regulation with comparable scale, though primarily a distribution-focused player with transmission as part of broader portfolio.
• ENGIE Brasil: Brazilian subsidiary of French multinational ENGIE with generation, transmission, and distribution assets. Operates transmission concessions under the same ANEEL regulatory framework as ISA Energia Brasil but as part of a diversified energy portfolio.
• Auren Energia: Brazilian integrated energy company resulting from the merger of AES Brasil and Auren, with transmission, generation, and commercialization operations. Competes in ANEEL auctions and shares Brazilian energy transition exposure with ISA Energia Brasil.
• Eletrobras (Axia Energia / Chesf): Brazil's largest electric utility with extensive transmission assets through subsidiaries like Chesf and Axia Energia. ISA Energia Brasil recently completed an asset unwinding transaction with Axia, demonstrating close peer status. Operates a broader generation/transmission/distribution portfolio rather than pure-play transmission.

Emerging players

• ISA (Interconexión Eléctrica S.A.): Colombian parent company of ISA Energia Brasil and the largest electricity transmission operator in Latin America with operations across Colombia, Peru, Chile, Bolivia, and Brazil. Parent-level peer demonstrating the broader Latin American transmission platform and capital allocation strategy.

Market position

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@ISAENERGIABRASILOficial
• Facebookfacebook.com/isaenergiabrasil
• LinkedInlinkedin.com/company/isaenergiabrasil
• Instagraminstagram.com/isaenergiabr

Compliance13 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ISA ENERGIA BRASIL