Acea

M&A Activity • Sep 30, 2025

Press Release

ACEA: SALE OF HIGH-VOLTAGE ELECTRICITY GRID TO TERNA COMPLETED

Rome, 30 September 2025 – ACEA announces that today, through its subsidiary Areti (100% ACEA), it has completed the closing with Terna for the sale of 100% of the share capital of Rete 2 S.r.l., owner of the High Voltage (HV) electricity grid in execution of the agreement signed on 6 November 2024.

The assets owned by Rete 2 S.r.l. include 73 HV power lines extending over about 481 km of network (overhead and cable lines), fiber optic network extended on the HV lines included in the agreement, HV elements pertaining to 3 primary substations, and the employment contracts of the staff responsible for managing the high voltage network serving the Rome metropolitan Area.

The total consideration for the sale amounts to 251 million Euro, of which nearly 227 million Euro, subject to price adjustments, paid by Terna today and around 24 million Euro relating to the incentive, corresponding to 4% of the revalued historical cost, that will be recognised by ARERA after the closing.

Compared to the consideration defined in the agreement signed on 6 November 2024, the value of the transaction reflects the update of the overall value of the assets for regulatory purposes (Regulated Asset Base - RAB) subject to the sale, which, to date, amounts to 207 million Euro.

ACEA's Chief Executive Officer, Fabrizio Palermo, commented: "The transaction, consistent with ACEA's strategy outlined in the 2024-2028 Business Plan, offers the opportunity to reinvest the proceeds from the sale to improve the quality of the electricity distribution service in Rome by accelerating the transition to a more efficient, resilient, digitalized and increasingly safe network also through the use of robotics and artificial intelligence".

The transaction was finalized following the adoption of the decree of the Ministry of Environment and Energy Security (MASE) which provided for the inclusion of the assets subject to the sale in the National Electricity Transmission Grid starting from the date of completion of the transaction itself.

ACEA Group Contacts Investor Relations Tel. +39 0657991 investor.relations@aceaspa.it

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