ISA ENERGIA BRASIL is the leading private company in the Brazilian electric power transmission sector. Through its operations and its subsidiaries and affiliates, the Company operates in 15 Brazilian states (Rio Grande do Sul, Santa Catarina, Paraná, São Paulo, Rio de Janeiro, Minas Gerais, Rondônia, Mato Grosso, Mato Grosso do Sul, Goiás, Tocantins, Maranhão, Piauí, Espírito Santo and Bahia) and is responsible for approximately 30% of all electricity transmitted through the National Interconnected System (Sistema Interligado Nacional – SIN). The coordination and control of the operation of the Company’s facilities, as well as all power generation and transmission facilities within the SIN, are the responsibility of the National Electric System Operator (Operador Nacional do Sistema Elétrico – ONS), under the supervision and regulation of the Brazilian Electricity Regulatory Agency (Agência Nacional de Energia Elétrica – ANEEL).
The Company is currently well established in the electric power transmission sector, operating as an economic group and directly controlling seventeen companies, in addition to holding shared control of three other companies. Together, these companies total 33 concession agreements, 22,4 thousand kilometers of constructed lines, 82.9 thousand MVA of transformation capacity.
ISA ENERGIA BRASIL’s shares are listed on the Level 1 Corporate Governance segment of B3 S.A., under the ticker symbols ISAE3 and ISAE4. The Company’s adherence to this segment since 2002 reinforces its commitment to high standards of transparency and corporate governance, facilitating the monitoring of management actions by investors, shareholders and other stakeholders. Currently, the Company is part of several market indices, including the Bovespa Index (IBOV), Brazil Broad Index (IBRA), Dividend Index (IDIV), Corporate Governance Trade Index (IGCT), MidLarge Cap Index (MLCX), Public Utilities Index (UTIL), Carbon Efficient Index (ICO2), Bovespa Smart Dividend Index (IBSD), Bovespa BR+ Index (IBBR), Bovespa Smart Low Volatility Index (IBLV), Diversity Index (IDVR), Bovespa Private Companies Index (IBEP), Bovespa B3 Equal Weight Index (IBEW), Corporate Sustainability Index (ISEE), Bovespa BR+ Cap 5% Index (IBBC), Bovespa BR+ Equal Weight B3 Index (IBBE), Bovespa B3 Index (IBXX), Bovespa Smart High Beta Index (IBST), Electric Energy Index (IEEX), Energy Funds Index (IFES) and Corporate Governance Index (IGCX).
Committed to the development of Brazil’s energy infrastructure, the Company continuously invests in the maintenance and modernization of its network, directly contributing to the expansion of the national transmission system. Since 2016, the Company has been awarded 19 lots in transmission auctions held by ANEEL, totaling a weighted regulatory investment of R$ 15.7 billion and an estimated increase of approximately R$ 1,909 million in Annual Allowed Revenue (“RAP”) in the 2026/2027 cycle, after all assets enter into operation.
In addition to auctions, another relevant growth avenue for the Company is investment in reinforcement and improvement projects (R&M). Over the first nine months of 2026, R&M investments totaled R$ 1.4 billion, reinforcing the Company’s commitment to efficient management, resilience and reliability of the transmission system. In addition to ensuring excellence in service delivery, asset renewal supports a reduction in O&M costs and increases the efficiency and profitability of operations. Currently, the Company has approximately R$ 7.6 billion to be executed over the coming years. These investments are fundamental to proper asset management, reduction of operating costs, extension of asset life and sustainable value creation, with CapEx remuneration in accordance with the applicable regulatory framework.
Updated on November 3, 2026.