In 2012 a mandatory tender offer for Edison ordinary shares was launched by Transalpina di Energia Srl, (TdE) a company that until May 24th, 2012 owned 61.28% of Edison’s ordinary capital.

The obligation to launch the offer arised as a result of the acquisition by WGRM (EDF Group) of remaining 50% of TdE from Delmi (51% owned by A2A) and of the concurrent expiry of the shareholders' agreement entered into by Delmi and EDF. Consequently EDF, which already owned directly and indirectly 49.97% of Edison reached 80.64% of ordinary capital.

At the closing date of the Offer (August 3, 2012) the threshold of 95% of Edison's voting share capital has been reached and exceeded. Therefore the conditions for the fulfilment of the sell-out right pursuant to article 108, first paragraph, of the Financial Services Act occured. TdE has fulfilled the sell-out obligation between August 13th and September 4th 2012 and thus EDF now owns 99.477% of Edison's voting capital.

Borsa Italiana Spa has decided the delisting of the ordinary shares of Edison from the electronic stock market (Mercato Telematico Azionario) as of September 10, 2012.

Edison's saving shares have not been involved in the offer and remain listed.