- Business
- Terna - Rete Elettrica Nazionale Società per Azioni (TRN.MI) operates as Italy's transmission system operator, managing the national high- and extra-high-voltage electricity grid, dispatching, and metering services; it oversees approximately 75,000 kilometers of lines, 915 substations, multiple control centers, and interconnections with neighboring countries, including the SA.PE.I. submarine cable to Sardinia. The company provides regulated services for grid development, operation, and maintenance, alongside non-regulated offerings through subsidiaries such as Terna Energy Solutions, including engineering, procurement, and construction (EPC) for high-voltage substations, photovoltaic plants, and storage systems via Altenia; production of transformers through Tamini Group and overland cables through Brugg Cables Group; connectivity services like optical fiber rights, pylon rentals, and telecommunications housing; and private interconnectors. Terna serves energy producers, distributors, and large consumers across Italy and operates internationally through Terna International in regions including Latin America, with advisory services for grid modernization and renewable integration; it targets the energy transition with solutions for renewables, smart grids, energy efficiency, and digital infrastructure.
Founded in 1999 and headquartered in Rome at Viale Egidio Galbani 70, Terna structures its operations into regulated activities in Italy and non-regulated segments encompassing equipment supply, energy services, connectivity, and interconnectors, positioning it as Europe's leading grid operator by scale.
In its updated 2024-2028 Industrial Plan approved in March 2025, Terna commits €17.7 billion in total capital expenditure, including €16.6 billion for regulated grid enhancements—a 7% increase from prior plans—to fund major projects like the Tyrrhenian Link connecting Sardinia, Sicily, and Campania, Adriatic Link, Sa.Co.I.3 interconnector with Corsica and Tuscany, Elmed link to Tunisia, and Sicily's 380 kV Chiaramonte Gulfi-Ciminna line, alongside €2.4 billion for digitalization in areas such as substation automation, digital twins, IoT, and cyber security. The company advances its innovation strategy via Terna Forward, its corporate venture capital arm, with 2024 direct investments in startups including a 33% stake in Wesii S.r.l. for energy sector inspection services, plus Melaworks, D-orbit, and Unusuals World, and indirect stakes via CdP Venture Capital; it expanded Terna Innovation Zones with new hubs in Ascoli Piceno, San Francisco, and Tunis in early 2025 to foster open innovation ecosystems. Terna signed a strategic partnership with Microsoft in 2025 to deploy AI, cloud solutions, and Microsoft 365 Copilot for digitalization, security, predictive maintenance, and sustainability across operations; additionally, on September 30, 2025, it acquired 100% of Rete 2 S.r.l. from Areti/Acea, expanding its grid assets, while its 2025-2034 Development Plan outlines over €23 billion in investments, including €700 million in the Marche region for projects like the Adriatic Link.