• ISA’s share stood out in the MSCI Colcap index as one of the most actively traded, reaching a peak of COP 26,300, its highest level since 2021.
• The company reported EBITDA of COP 8.7 trillion, net income of COP 2.4 trillion, and a return on equity close to 14%.
• ISA secured projects with investments of approximately USD 283 million and brought into operation projects with a CAPEX of USD 664 million.
• The company closed the year with a Social Return on Investment (SROI) of 4.15, meaning that for every peso invested in social management, ISA generated 4.15 times in social value.

ISA closed 2025 with results that reflect its operational and financial strength, disciplined execution of its strategy, and leadership in the energy transition across Latin America.

This performance was reflected in the company’s share price, which stood out in 2025 as one of the most actively traded stocks within the MSCI Colcap index, increasing by 48% during the year. The share reached a peak price of COP 26,300, levels not seen since 2021. Including dividends paid during the year totaling COP 1,265 per share, total shareholder return reached 55%.

During 2025, ISA executed investments of COP 6.3 trillion, representing a 31% increase compared to 2024, consolidating its leadership in the countries where it operates. Over the next five years, the company plans to invest COP 25.5 trillion. In parallel, through innovation, ISA generated revenues of USD 6.76 million and achieved efficiencies of USD 0.46 million.

From an operational standpoint, the company secured projects with investments close to USD 283 million and commissioned projects with a CAPEX of USD 664 million. In Colombia, the energization of the Cuestecitas–Copey–Fundación interconnection stood out as a key milestone, enabling renewable energy generated in La Guajira to be transmitted to the rest of the country and strengthening the National Transmission System. In Brazil, ISA delivered Riacho Grande, the country’s longest underground transmission line. In the Roads business, the financial close of the Ruta Panamericana Este project for USD 281 million was achieved, securing resources for its execution. In Telecommunications, the year closed with more than 1,000 new kilometers of fiber optic infrastructure deployed across Latin America.

On the financial front, in 2025 ISA recorded EBITDA of COP 8.7 trillion and net income of COP 2.4 trillion. These results were impacted by extraordinary events in both 2024 and 2025. In 2024, the periodic tariff review in Brazil, adjustments to major maintenance in Peru, and the Air-e provision in Colombia resulted in an additional COP 186 billion in net income. In 2025, net income was negatively impacted by COP 344.6 billion due to two factors: an adjustment to the update formula of the financial component of assets of Brazil’s Existing System Basic Network (RBSE), amounting to COP 140.4 billion, and an increase in the provision for Air-e receivables in Colombia totaling COP 204.2 billion. As a result, net income for 2025 decreased by 14% compared to the previous year; excluding these effects, it would have increased by 5%.

“The 2025 results confirm market and stakeholder confidence in our strategy and our ability to execute investments with focus, discipline, and a long-term vision, strengthening our leadership in the region’s energy transition,” said Gabriel Melguizo, Acting CEO of ISA.

At the same time, ISA continued advancing its sustainability agenda and contributions to local communities. In 2025, the company invested approximately COP 28 billion in high-impact social management initiatives and closed the year with an SROI of 4.15. Additionally, ISA defined its decarbonization pathway toward Net Zero and achieved 114% of its annual target.

Key highlights of 2025

• Launch of the ISA2040 Strategy.
• Entry into the energy solutions business as a lever for energy transition and portfolio diversification.
• Transformation of ISA Transelca as the vehicle to develop the energy solutions business in Colombia.
• Intercolombia assumed operation, administration, and maintenance of energy transmission assets in Colombia’s Caribbean region.
• Evolution of the brand architecture under ISA ENERGÍA and ISA VÍAS across Latin America.
• Creation of Hi, ISA’s digital services hub, to drive operational efficiency, regional scale, and technology adoption.
• ALAS20 Award recognition for investor relations.
• Ranked among the Top 10 Best Companies to Work For by Great Place to Work in Colombia.
• Inclusion in S&P’s Sustainability Yearbook.
• Score of 85/100 in the Dow Jones Sustainability Index, placing ISA among the top 15 companies in the sector and within the top 10% globally for sustainability performance.